Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
43results about How to "Improve scavenging efficiency" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Air charging system for an opposed piston opposed cylinder free piston engine
InactiveUS6957632B1Avoid less frictionEfficient chargingElectrical controlInternal combustion piston enginesFree-piston enginePump chamber
A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, with a push rod connected between the inner pistons. The push rod extends through an inner pumping chamber in the fluid pumping assembly and forms a fluid plunger within this chamber. An outer piston assembly includes a pair of pistons, one each operatively located in a respective one of the engine cylinders, with at least one pull rod connected between the outer pistons. The pull rod extends through an outer pumping chamber in the fluid pumping assembly and forms a fluid plunger within this chamber. Each outer piston cooperates with an integrated scavenge pump in order to compress the charge air, thus significantly increasing the air charge density into the engine cylinders for each stroke of the engine.
Owner:FORD GLOBAL TECH LLC
Horizontally-opposed balance type gasoline range extender and operation method thereof
InactiveCN105240120AImprove powerImprove economyPropulsion using engine-driven generatorsCombustion enginesGasolinePure electric vehicle
The invention discloses a horizontally-opposed balance type gasoline range extender and an operation method thereof. The range extender comprises a horizontally-opposed piston two-stroke gasoline engine, a transmission case and an electric generator. The power output end of the horizontally-opposed piston two-stroke gasoline engine is connected with the transmission case, and an output port of the transmission case is connected with a rotor shaft of the electric generator. By means of the technical scheme, the defects that a traditional two-stroke gasoline engine is poor in economy and emission performance and the like are effectively overcome, the advantages of the simple and compact structure, good balance, high power density, high thermal efficiency and the like of the horizontally-opposed piston two-stroke gasoline engine are fully used, the engine is highly integrated with the electric generator, and therefore the range extender has a remarkable advantage as a range extender of a pure electric vehicle.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Layered scavenging two-stroke gasoline engine
ActiveCN105804858AEmission reductionImprove scavenging efficiencyInternal combustion piston enginesCylinder headsInlet channelCombustion chamber
The invention provides a layered scavenging two-stroke gasoline engine, and belongs to the technical field of gasoline engines. According to the layered scavenging two-stroke gasoline engine, a semi-closed inner channel is formed in a piston. When the piston ascends in a cylinder body, the air is stored in the semi-closed inner channel from an air inlet channel in advance, and then enters scavenging channels, mixed gas enters the scavenging channels from a mixed gas inlet channel afterwards, and therefore when scavenging operation is conducted, a large amount of air is scavenged in advance, then the mixed gas is scavenged, and the quantity of the mixed gas is greatly reduced. In addition, due to the facts that the scavenging channels on the two sides of the cylinder body are of an asymmetric structure, and are different in structure, paths are different, the gas has different flowing performance in the scavenging channels of the cylinder body, and vortexes are generated when the gas flows into a combustion chamber, the scavenging efficiency is greatly improved, and emission of compounds such as HC and CO in exhaust gas is reduced.
Owner:SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
Oppositely-arranged four stroke free piston internal combustion-linear electricity generating integrated device
InactiveCN103590899AGood dynamic balanceMaintain dynamic balanceFree piston enginesExternal combustion engineActive cell
The invention discloses an oppositely-arranged four stroke free piston internal combustion-linear electricity generating integrated device. The oppositely-arranged four stroke free piston internal combustion-linear electricity generating integrated device comprises a four-stroke internal combustion engine, two linear motors, a reversible electric energy storing device, an electric power unit and an electronic control unit, wherein each linear motor has an electricity generating working mode and an electric working mode, the electric power unit is used for connecting the linear motors and the reversible electric energy storing device, the electronic control unit is respectively connected with a valve timing mechanism, an ignition device and the electric power unit of the four-stroke internal combustion engine, active cells of the linear motors are fixedly connected with two pistons of the internal combustion engine, the active cell of each linear motor is provided with a position detecting component which is connected with the electronic control unit, the two ends of a combustor cylinder of the four-stroke internal combustion engine are open, the two pistons are symmetrically arranged inside the combustor cylinder, and the two linear motors are symmetrically arranged inside the combustor cylinder. The oppositely-arranged four stroke free piston internal combustion-linear electricity generating integrated device is good in operation dynamic balanced performance and high in scavenging efficiency.
Owner:NANJING UNIV OF SCI & TECH
Low-discharge two-stroke gasoline engine
InactiveCN101463753AReduce the opening areaIncrease pressureInternal combustion piston enginesGasolineEngineering
The invention discloses a low emission two-stroke gasoline engine, comprising a cylinder body, a piston, a cylinder cavity, a first half crankcase and a second half crankcase, and a crank chamber formed by the first half crankcase and the second half crankcase. The two-stroke gasoline engine is characterized in that scavenging air belts which communicates the crank chamber with the cylinder cavity are symmetrically arranged at the cylinder body, the scavenging air belts feature a closed type structure, and the closed type structure is realized by arranging end covers at the two sides of the cylinder body; gas partition walls are arranged at the scavenging air belts, the gas partition walls divide the scavenging air belts into a scavenging air belt 1 and a scavenging air belt 2 and the angle of the scavenging air belts is designed to be alpha; throttling holes are arranged at a cylinder body combination surface of the first half crankcase and the second half crankcase, and the throttling holes turn the gas flow in the lower reach of the scavenging air belts into impingiment flow, thus effectively reducing content of injurious ingredient (HC and NOx), improving initial discharge, effectively lowering fuel consumption rate of the gasoline engine, and improving economic performance.
Owner:SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
Air inlet device with two air inlet channels for two-stroke engine
InactiveCN102230421AIncrease air intakeGuaranteed to burnExhaust apparatusCombustion-air/fuel-air treatmentInlet channelShrinkage rate
The invention relates to a air inlet device with two air inlet channels for a two-stroke engine, which comprises an air inlet piston (1), a cylinder sleeve (3) and an exhaust piston (6), wherein the air inlet piston (1) and the exhaust piston (6) are arranged in the cylinder sleeve (3); an annular air inlet (2) and an annular exhaust opening (5) are circumferentially arranged on the excircle of the cylinder sleeve (3); double exhaust channels (7) are arranged on the annular exhaust opening (5); an oil sprayer installation opening (4) is arranged on the cylinder sleeve (3); the air channel cross-sectional area shrinkage rate of the double exhaust channels (7) is 10-12mm<2> / mm; and the fresh air is charged from both ends of double air inlet channels (7). The invention has the advantages of improving air inlet amount, reducing the pressure loss, preventing the problem of airflow congestion caused by overlarge initial airflow speed and ensuring the formation of isobaric airflow in the air channel.
Owner:CHINA NORTH IND GRP NO 70 RES INST
High-pressure exhaust gas recirculation (EGR) system of vehicle engine
InactiveCN106703978AImprove fuel saving effectReduce the difficulty of layoutInternal combustion piston enginesExhaust gas recirculationGasolineActuator
The invention discloses a high-pressure exhaust gas recirculation (EGR) system of a vehicle engine and relates to an EGR system. The high-pressure EGR system of the vehicle engine passes through the engine, wherein the engine is provided with a gas inlet and a gas outlet and comprises a gas inlet pipeline, a gas outlet pipeline, an EGR pipeline and an electronic pressurizer. The gas inlet pipeline is arranged in front of the gas inlet. The gas outlet pipeline is arranged behind the gas outlet. The ERG pipeline is connected between the gas inlet and the gas outlet pipeline of the engine and used for conducting ERG on part of gas exhausted by the gas outlet pipeline and then sending the exhaust gas to the engine again. The electronic pressurizer is arranged on one side of the gas inlet pipeline through a pipe. The electronic pressurizer is arranged on the gas inlet pipeline of the high-pressure EGR system, so that parts are fewer, the application cost is low, and the arrangement difficulty is relatively low; and actuators needing to be controlled are fewer, so that calibration is easy to conduct, the oil-saving effect of the electric pressurizer and the high-pressure EGR technology which are applied to a pressurizing gasoline engine is improved, and application of the electric pressurizer and the high-pressure EGR technology to the pressurizing gasoline engine is promoted.
Owner:ZHEJIANG GEELY HLDG GRP CO LTD +1
High compression ratio two-stroke gasoline compression ignition device and control method
ActiveCN106762102AIncrease layeringReduce mixInternal combustion piston enginesExhaust gas recirculationGas cylinderGasoline
The invention discloses a high compression ratio two-stroke gasoline compression ignition device and a control method. The stroke length of an air cylinder of the device is 90mm-110mm; a fuel injector and an electric heating plug are separately mounted on the top of the air cylinder; five scavenging ducts are separately formed in the side wall of a crankcase; the lower port of each scavenging duct communicates with the crankcase and communicates with the gas cylinder; a scavenging duct valve is mounted at the lower port of the fifth scavenging duct; a gas inlet is formed in the side wall of the crankcase, and a gas inlet pipe communicates with the crankcase; a gas compressor, a gas inlet control valve, an intercooler and a reed valve are successively mounted on the gas inlet pipe along the gas inlet direction; one end of a gas inlet by-pass pipe is connected to a gas inlet pipe between a turbine motor and the intercooler while the other end is connected to a gas inlet pipe between the intercooler and the reed valve; and an exhaust recycling pipe communicates between the outlet port of an exhaust pipe and the inlet port of the gas inlet pipe. The power is improved, and the oil consumption and discharge are reduced.
Owner:TIANJIN UNIV
HCCI micro free piston electric generator
ActiveCN107740727ASimple structureMiniaturizationInternal combustion piston enginesExhaust apparatusCombustion chamberMechanical energy
The invention provides an HCCI micro free piston electric generator. The HCCI micro free piston electric generator comprises a stator and micro free piston power devices. The stator is provided with amain air inlet, the stator is divided into stator work units through the main air inlet, the stator work units are symmetrically distributed and are of the same structure, fixed dividing rings are arranged in the stator work units, the micro free piston power devices are arranged in the stator work units, a work chamber comprises a combustion chamber and a pressure chamber, the pressure chamber is communicated with the main air inlet, a combustion chamber air inlet and a combustion chamber exhaust opening are formed in the combustion chamber, a pressure chamber air inlet is formed in the pressure chamber, the pressure chamber air inlet and the combustion chamber air inlet are connected through a pipeline, a one-way valve is arranged on the main air inlet, and an exciting winding and a stator winding are arranged on the inner wall of each stator work unit. Mechanical energy is directly converted into electric energy, waste gas waste heat is used for preheating mixed gas, the initial temperature of the mixed gas is improved, and compression combustion of the mixed gas is facilitated.
Owner:泰州市海创新能源研究院有限公司
Two-stroke gasoline engine cylinder
PendingCN109826719ALong scavenging pathImprove scavenging efficiencyCylinder headsCylindersCombustion chamberGasoline
The invention relates to a two-stroke gasoline engine cylinder. The cylinder comprises a cylinder body, a first side cover and a second side cover, wherein after the first side cover is matched with the cylinder body, one pure air storing chamber is formed; after the second side cover is matched with the cylinder body, another pure air storing chamber is formed; the cylinder body is provided witha pure air inlet, a mixer gas inlet, a scavenging port and an exhausting port; the installing flange positions, close to scavenging channels on the two sides, of the cylinder body are provided with aplurality of scavenging flow limiting holes; the structure of the scavenging flow limiting holes can limit the scavenging charge and increase the scavenging speed for mixed gas participating in scavenging, so that the mixed gas fast passes through the scavenging flow limiting holes to fast eject pure air in the pure air storing chambers into a combustion chamber, the charge of fresh gas in tail gas is faster occupied, and due to the fact that the tail gas exhausted out of the exhausting port of the cylinder body contains lots of fresh pure air, the content of THC and CO in the tail gas can begreatly lowered, and the purpose of energy saving and emission reducing is achieved.
Owner:SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
Scavenging system of constant-pressure air source type free piston internal combustion generator
ActiveCN102877929AHigh intake pressurePlay a supercharging effectCasingsInternal combustion piston enginesCombustionSource type
The invention relates to a scavenging system of a constant-pressure air source type free piston internal combustion generator, and belongs to the technical field of power machinery. The scavenging system comprises a scavenging box, an air cylinder and a constant-pressure air source, wherein the air cylinder comprises an air cylinder sleeve, a cylinder body and an air cylinder cover; the air cylinder sleeve is fixedly connected with the cylinder body; one end of the cylinder body is tightly and fixedly connected with the air cylinder cover, and the other end of the cylinder body is fixedly connected with the scavenging box; a sealing material such as a pad is clamped between contact faces at two ends, so that a sealing effect is achieved; a first main scavenging port, a second main scavenging port and an auxiliary scavenging port of the scavenging box are correspondingly connected with a first main scavenging port, a second main scavenging port and an auxiliary scavenging port formed in the air cylinder sleeve respectively through a first main scavenging pipeline, a second main scavenging pipeline and an auxiliary scavenging pipeline of the cylinder body; an air blower of the constant-pressure air source is connected with an air inlet of an air storage tank; and an air outlet is connected with an air inlet of the scavenging box. When the constant-pressure air source is used, the air inlet pressure intensity is higher than that of external atmosphere pressure; a pressurization effect is achieved; and the scavenging system adopts special design, so that the scavenging efficiency is obviously improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Structure of exhaust gas separation device of internal combustion engine
InactiveCN101818700AEasy drillingEasy to removeInternal combustion piston enginesCylinder headsHydraulic cylinderLower limit
According to the invention, the burnup of an internal combustion engine is improved and the reliability and work efficiency is increased. A low-temperature chamber (14) has a section area from a predetermined position as a starting point to a low-temperature exhaust channel inlet in a scroll shape gradually enlarged in a gas rotating direction. Rectification plates (17, 18) for guiding the high-temperature gas guided into a high-temperature chamber into a high-temperature exhaust channel are arranged on the inner wall surface (12a) of the high-temperature chamber. A hydraulic type zero point position controlling device (52) for defining the lower limit position of an accessory valve air piston and controlling the zero point limiting position of an accessory valve (25) is arranged in a hydraulic cylinder body (40) forming a plurality of hydraulic cylinders (43). the hydraulic cylinder body (40) is formed by an external hydraulic cylinder body (41) and an inner hydraulic cylinder body (42), the plurality of hydraulic cylinders (43) and a first hydraulic channel (65) are formed in the inner hydraulic cylinder body, a second hydraulic channel (69) is formed between the external hydraulic cylinder body and the inner hydraulic cylinder body, and third hydraulic channels (61, 62, 63) are formed in the external hydraulic cylinder.
Owner:MITSUI ENG & SHIPBUILD CO LTD
Air cylinder sleeve for two-stroke diesel engine and processing method for air cylinder sleeve
InactiveCN107917010AUnique structureReduce wearCylinder headsCylindersCooling effectPulp and paper industry
The invention discloses an air cylinder sleeve for a two-stroke diesel engine and a processing method for the air cylinder sleeve. The air cylinder sleeve comprises a cylinder sleeve body, a water sleeve, a water inlet flange, a water separator and a connecting stud, wherein an inner hole of the cylinder sleeve body is divided into an upper straight-hole section, a middle drum-shaped hole sectionand a lower straight-hole section which communicate with one another from top bottom; the water sleeve comprises an upper water sleeve and a lower water sleeve, and are separately brazed on the cylinder sleeve body to form an upper cooling water cavity and a lower cooling water cavity; the water inlet flange is welded on the lower water sleeve; the water separator is assembled in the water inlet flange; and the connecting stud is arranged at the upper end of the cylinder sleeve body. The two-stroke diesel engine disclosed by the invention can improve friction wear performances of the cylindersleeve, improves scavenging efficiency, and improves the cylinder sleeve cooling effect, so that the service life is prolonged and energy consumption is reduced.
Owner:CRRC CHANGZHOU DIESEL ENGINE COMPONENTS CO LTD +1
Opposed-piston and opposed-cylinder two-stroke internal combustion engine without connection rod
InactiveCN108049971AAchieve balanceEliminate side pressureCylinder headsCylindersFriction lossExternal combustion engine
The invention discloses an opposed-piston and opposed-cylinder two-stroke internal combustion engine without a connection rod. The opposed-piston and opposed-cylinder two-stroke internal combustion engine comprises opposed cylinder sleeves, wherein a plurality of opposed pistons are arranged in each cylinder sleeve, and the interior of cylinder sleeve is partitioned into a plurality of cylinders by the opposed pistons; a power output mechanism is arranged on each opposed piston; a synchronization mechanism is arranged on each power output mechanism; a plurality of groups of dual fuel injectorsare symmetrically arranged on each cylinder sleeve; and the power output mechanisms convert the reciprocating rectilinear movement of the opposed pistons in the cylinder sleeves to rotational movement under the constraint of the synchronization mechanisms, so that power output is completed. The opposed-piston and opposed-cylinder two-stroke internal combustion engine disclosed by the invention issimple and reasonable in structure, low in friction loss and high in mechanical efficiency, effectively eliminates a lateral pressure between each piston and the corresponding cylinder sleeve, whichis generated by a crank-connection rod mechanism, and is high in practicability and worthy of popularization.
Owner:ZHONGBEI UNIV
Crankshaft assembly and engine
ActiveCN112727905AReduce quality problemsImprove performanceCrankshaftsMachines/enginesWhole bodyCrankshaft
The invention discloses a crankshaft assembly. The crankshaft assembly comprises a crankshaft and a filler, wherein the filler is in interference connection with the crankshaft, so that the filler and the crankshaft are connected into a whole body. The filler is fixed to the crankshaft in an interference connection mode, so that the crankshaft assembly is simple and compact in structure, the number of assembled parts is reduced, the assembling efficiency is improved, the weight of the crankshaft assembly is reduced, the rotating inertia force of the crankshaft is reduced, and the production cost is saved; and the crankshaft assembly is installed on an engine, so that the overall mass of the engine is reduced, the lightweight design is realized, the scavenging efficiency of an engine cylinder body is improved, the performance of the engine is improved, the production cost is reduced, and the market competitiveness is improved.
Owner:CHONGQING IONCIN NAVIGATION ENGINE MFG C0 LTD
Scavenging boost structure of two-stroke engine
PendingCN110985195AImprove scavenging efficiencyImprove atomization effectCasingsInternal combustion piston enginesGas cylinderCrankcase
The invention provides a scavenging boost structure of a two-stroke engine. The scavenging boost structure comprises a cylinder body assembly and a crankcase assembly. According to the structure, a crankcase scavenging flow limiting hole is designed in a crankcase scavenging channel, a cylinder body scavenging flow limiting hole is designed in a cylinder body scavenging channel, and the effectivearea of the crankcase scavenging flow limiting hole is larger than that of the cylinder body scavenging flow limiting hole. When the engine works normally, mixed gas in the crankcase enters the cylinder body scavenging channel after being boosted by the crankcase scavenging flow limiting hole and then boosted again under the action of the cylinder body scavenging flow limiting hole, the two structures interact, the gas flow speed can be greatly increased, the scavenging efficiency in gas cylinders can be enhanced, the atomization effect on fuel can be promoted substantially, and the combustionefficiency can be improved, so that discharge of THC and NOx in tail gas is greatly reduced; and scavenging flow limiting holes, cylinder bodies and a crankcase body are set as an integrated structure, the scavenging flow limiting holes can be implemented by mold structures, processing procedures are not added, and the manufacturability and practicability are better.
Owner:SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
General technology of low emission and environmental protection for small two-stroke gasoline engine
InactiveCN105041455ALower combustion temperatureAct quicklyInternal combustion piston enginesCylinder headsCombustion chamberCombustible gas
The invention discloses general technology of low emission and environmental protection for a small two-stroke gasoline engine. Three air inlets and an air exhaust are arranged in a cylinder body. A closed-type air-scavenging duct is communicated with an inner cavity of the cylinder body by means of two air-scavenging ports in a cylinder sleeve. The area sizes of the two air-scavenging ports are respectively one third and a quarter of the sectional area sizes of a first air-scavenging duct and a second air-scavenging duct so that the effect of saving air is achieved. Openings of the air-scavenging ports of the cylinder sleeve are machined to be oblique ports of certain angles such that air-scavenging angle Alpha is kept in the range between 120 degrees to 150 degrees. The general technology of low emission and environmental protection for the small two-stroke gasoline engine has following beneficial effects: pure air directly enters a combustion chamber for air-scavenging operation in advance, thereby lessening adverse impact when air-scavenging operation is performed by solely using combustible gas mixture; at the same time, combustion temperature of the cylinder is decreased so that full combustion is achieved; the use of the alloy cylinder sleeve helps to improve the effect of the closed-type air-scavenging duct; while airflow velocity is increased, atomization of fuels is prompted and air-scavenging efficiency is increased; and the application of the alloy cylinder sleeve also helps to enhance abrasion resistance, corrosion resistance and resistance to high temperature of the inner wall of the cylinder body such that service lifetime of a machine is substantially prolonged.
Owner:SHANDONG BOSHENG POWER TECH CO LTD
A device for adjusting the height of the gas port of an internal combustion engine
InactiveCN109026461BSmall range of motionSmall structureMachines/enginesAir intakes for fuelEngineeringInternal combustion engine
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
A high compression ratio two-stroke gasoline compression ignition device and control method
ActiveCN106762102BIncrease layeringReduce mixInternal combustion piston enginesExhaust gas recirculationGas cylinderGasoline
The invention discloses a high compression ratio two-stroke gasoline compression ignition device and a control method. The stroke length of an air cylinder of the device is 90mm-110mm; a fuel injector and an electric heating plug are separately mounted on the top of the air cylinder; five scavenging ducts are separately formed in the side wall of a crankcase; the lower port of each scavenging duct communicates with the crankcase and communicates with the gas cylinder; a scavenging duct valve is mounted at the lower port of the fifth scavenging duct; a gas inlet is formed in the side wall of the crankcase, and a gas inlet pipe communicates with the crankcase; a gas compressor, a gas inlet control valve, an intercooler and a reed valve are successively mounted on the gas inlet pipe along the gas inlet direction; one end of a gas inlet by-pass pipe is connected to a gas inlet pipe between a turbine motor and the intercooler while the other end is connected to a gas inlet pipe between the intercooler and the reed valve; and an exhaust recycling pipe communicates between the outlet port of an exhaust pipe and the inlet port of the gas inlet pipe. The power is improved, and the oil consumption and discharge are reduced.
Owner:TIANJIN UNIV
A HCCI Micro Free Piston Generator
ActiveCN107740727BSimple structureMiniaturizationInternal combustion piston enginesExhaust apparatusCombustion chamberMechanical energy
The invention provides an HCCI micro free piston electric generator. The HCCI micro free piston electric generator comprises a stator and micro free piston power devices. The stator is provided with amain air inlet, the stator is divided into stator work units through the main air inlet, the stator work units are symmetrically distributed and are of the same structure, fixed dividing rings are arranged in the stator work units, the micro free piston power devices are arranged in the stator work units, a work chamber comprises a combustion chamber and a pressure chamber, the pressure chamber is communicated with the main air inlet, a combustion chamber air inlet and a combustion chamber exhaust opening are formed in the combustion chamber, a pressure chamber air inlet is formed in the pressure chamber, the pressure chamber air inlet and the combustion chamber air inlet are connected through a pipeline, a one-way valve is arranged on the main air inlet, and an exciting winding and a stator winding are arranged on the inner wall of each stator work unit. Mechanical energy is directly converted into electric energy, waste gas waste heat is used for preheating mixed gas, the initial temperature of the mixed gas is improved, and compression combustion of the mixed gas is facilitated.
Owner:泰州市海创新能源研究院有限公司
A two-stroke high power-to-weight ratio heavy oil piston engine intake buffer and its design method
ActiveCN107524514BPollution controlImprove intake air qualityInternal combustion piston enginesTotal workAir pump
The invention provides a gas inlet buffer applied to a two-stroke high power-to-weight-ratio heavy oil piston engine and a design method thereof. The buffer is located between a scavenging pump outlet and an air cylinder gas inlet, the whole buffer is a group of cuboid-shaped accommodating cavities, and no other mechanical and moving parts exist in the buffer; and through structure design of the structural section of multiple groups of accommodating cavities, pollution to fresh air in an air inlet by backflow fuel gas in an air cylinder can be effectively controlled by the engine during scavenging, the backflow fuel gas is pushed into the air cylinder again, scavenging efficiency is higher, the scavenging coefficient is greater, and the total work of each time of circulation of the engine is larger.
Owner:北京领动国创科技有限公司
Valve type air inlet two-stroke engine
PendingCN112879155AImprove scavenging efficiencyLower cylinder temperatureValve arrangementsInternal combustion piston enginesIntercoolerAutomotive engineering
The invention provides a valve type air inlet two-stroke engine. An air inlet valve, a VVT, a roller rocker arm, a cam shaft, a hydraulic tappet, a spark plug and an oil sprayer are fixed to a cylinder cover; an intercooler is fixed in an intake manifold; an intake air filter is connected with an electronic supercharger, the electronic supercharger is connected with the intake manifold, the intake manifold is connected with a cylinder body, and an engine oil pump and a cylinder body exhaust passage are respectively fixed on the cylinder body; the lower edge of the cylinder body exhaust passage is flush with the top surface of a piston at a lower dead center position; a three-way catalyst is connected with the cylinder body exhaust passage in a pipeline form; and an intake valve, the spark plug, the oil sprayer, the piston, the cylinder cover and the surface of the cylinder body form a combustion chamber. Valve type air intake is used, a variable cam phase system is matched, a scavenging window is expanded, and scavenging efficiency is improved; a high-pressure in-cylinder direct injection system is used, the in-cylinder temperature is reduced, and the fuel oil atomization efficiency is improved; and pressure lubrication is used for replacing spray lubrication, HC emission is reduced, and emission of a four-stroke engine at the same level is realized.
Owner:北京盛瑞科智能科技合伙企业(有限合伙)
Stratified scavenging two-stroke gasoline engine
ActiveCN105804858BEmission reductionImprove scavenging efficiencyInternal combustion piston enginesCylinder headsInlet channelCombustion chamber
Owner:SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
A Miniature Free Piston Generator with Compound Combustion Chamber Structure
ActiveCN109113860BSimple structureReduce space occupancyInternal combustion piston enginesExhaust apparatusHydraulic cylinderCombustion chamber
The invention provides a miniature free piston generator with a compound combustion chamber structure. The miniature free piston generator comprises a hydraulic cylinder and a temperature difference power generation device; a first miniature free piston power device is located on an axis of a machine body, and a plurality of second miniature free piston power devices are uniformly distributed in the circumferential direction of the axis of the machine body; a plurality of air inlets and a generator exhaust port are formed in the machine body, and the exhaust port of the generator communicateswith an inner cavity of the machine body; the hydraulic cylinder comprises a first piston rod, a second piston rod and a hydraulic cavity, wherein the hydraulic cavity is connected with the machine body, the first piston rod and the plurality of second piston rods are arranged in the hydraulic cavity, and a piston body of the first miniature free piston power device is in linkage with the first piston rod; piston bodies of the second miniature free piston power devices are in linkage with a second piston rod; and the temperature difference power generation device is arranged in the machine body. According to the generator, mechanical energy of piston movement can be directly converted into electric energy so as to obtain a relatively high energy conversion rate; and preheating is carried out on the mixed incoming air by utilizing high-temperature waste gas.
Owner:JIANGSU UNIV
Two-stroke diesel engine combustion system and diesel engine comprising two-stroke diesel engine combustion system
ActiveCN112196663AImprove scavenging efficiencySimple structureInternal combustion piston enginesCombustion chamberScavenging
The invention discloses a two-stroke diesel engine combustion system and a diesel engine comprising the two-stroke diesel engine combustion system, and belongs to the technical field of engines. The system comprises an air inlet channel, an air cylinder and a combustion chamber, at least one scavenging port is formed in the air inlet channel, and the different scavenging ports are communicated with the air cylinder at different inclination angles so as to conduct layered rotational flow scavenging in the air cylinder. According to the two-stroke diesel engine combustion system, the layered rotational flow scavenging mode is adopted, scavenging of different areas can be completed, meanwhile, a vortex structure in the combustion chamber can be achieved, a good combustion organization is achieved, and the oil consumption rate of the two-stroke diesel engine is reduced.
Owner:TSINGHUA UNIV
Crankshaft assembly and engine
ActiveCN112727905BReduce quality problemsImprove performanceCrankshaftsMachines/enginesCylinder blockCrankshaft
The invention discloses a crankshaft assembly, which includes a crankshaft and a filler, and the filler is connected to the crankshaft through an interference connection, so that the filler and the crankshaft are connected as a whole; the filler is fixed to the crankshaft through an interference connection In addition, it not only has a simple and compact structure, but also reduces the number of parts assembled, thereby improving assembly efficiency, reducing the weight of the crankshaft assembly, thereby reducing the rotational inertia force of the crankshaft, and saving production costs; The above-mentioned crankshaft assembly is installed on the engine, thereby reducing the overall mass of the engine, realizing a lightweight design, and improving the scavenging efficiency of the engine cylinder block, thereby improving the performance of the engine, reducing production costs, and improving market competitiveness .
Owner:CHONGQING IONCIN NAVIGATION ENGINE MFG C0 LTD
Internal combustion engine having scavenging control valve
InactiveCN100491707CEnsure a large areaStop the leakCylinder headsCombustion enginesCombustionDecreased energy
The invention aims to provide an internal combustion engine equipped with a scavenging control valve, in which blow-by of combustion gas from the upper annular space above the top piston ring to the scavenging ports is prevented by which reduction in engine performance due to deposition of combustion gas residuum to the scavenge openings and occurrence of piston ring sticking due to deposition of combustion gas residuum to the piston rings can be prevented, and further the amount of working oil to drive the scavenging control valve can be reduced resulting in decreased energy loss for pressurizing the working oil. An annular-shaped scavenging control valve is fitted-in to a fitting face formed on the inner side of the cylinder liner movably in circumferential direction of the cylinder liner for opening and closing said scavenging ports in order to allow scavenge air to be supplied into the cylinder or interrupted, said scavenging control valve has a plurality of scavenge openings arranged along circumferential direction and in a plurality of stages in axial direction thereof so that the scavenge openings are brought into communication or discommunication with the scavenging ports of the cylinder liner by moving the scavenging control valve in circumferential direction thereof, and the scavenge openings of each stage has a height L1 which is smaller than a inside distance L2 between a top piston ring and a bottom piston ring equipped to a piston of the engine as shown in.
Owner:MITSUBISHI HEAVY IND LTD
Combustion structure and engine with same
PendingCN114856796ASolve complex structuresSimple structureInternal combustion piston enginesLift valveThermodynamicsCombustion chamber
The invention provides a combustion structure and an engine with the same. The combustion structure comprises a cylinder body, and the cylinder body is provided with a combustion chamber and an air inlet channel communicating with the combustion chamber; the pre-combustion chamber is arranged on the cylinder body, and a first scavenging hole communicating with the air inlet channel is formed in the side wall of the pre-combustion chamber; the seat ring is arranged in the air inlet channel, the seat ring is connected with the pre-combustion chamber, and a second scavenging hole communicated with the first scavenging hole is formed in the seat ring; and the air inlet valve component is movably arranged in the seat ring so as to block or release the second scavenging hole, and the combustion structure solves the problem that the structure of the precombustion chamber with scavenging is complex.
Owner:CHINA FIRST AUTOMOBILE
Exhaust valve structure of low-speed two-stroke marine diesel engine
ActiveCN112727560BLow flow resistanceEfficient exclusionInternal combustion piston enginesLift valveExhaust valveMarine engineering
The invention discloses an exhaust valve structure for a low-speed two-stroke marine diesel engine. The scheme is as follows: the exhaust valve is provided with an exhaust flow passage, and the inlet of the exhaust passage is arranged on the bottom surface of the exhaust valve; the outlet is arranged on the sealing surface of the exhaust valve. The exhaust runners are arranged circumferentially along the central axis of the exhaust valve. The flow channel can choose a single-ring or double-ring structure, and the angle α between the centerline of the single-ring exhaust flow channel and the horizontal plane is 20° to 40°. The double-ring layout structure is divided into inner ring and outer ring, the inner ring flow path angle α is 20°-40°; the outer ring flow path angle α' is 30°-50°. The angle β between the centerlines of all exhaust runners and the centerline of the exhaust valve projected onto the horizontal plane is 10°-20°. By setting the exhaust flow channel between the bottom surface of the valve and the sealing surface, the residual exhaust gas accumulated in the exhaust gas accumulation area under the valve is effectively eliminated, and the scavenging efficiency can be obviously improved. Through the design of different structural angles of the exhaust flow channel, the flow resistance of the exhaust gas is minimized, and the working performance of the diesel engine is improved.
Owner:TIANJIN UNIV
A scavenging system for a two-stroke engine
ActiveCN105863818BLow content of harmful ingredientsReduce fuel consumptionCasingsInternal combustion piston enginesCombustionFour-stroke engine
The invention discloses a scavenging system of a two-stroke engine. The system comprises a cylinder provided with a combustion acting chamber, a crankshaft box provided with a crankshaft chamber, a piston and a crankshaft assembly, wherein a fresh mixed air inlet and an exhausting port are formed in the cylinder; a thick mixed air scavenging channel and a thin mixed air scavenging channel are arranged in the crankshaft chamber; the thick mixed air scavenging channel is provided with a first air inlet and a first air outlet; the thin mixed air scavenging channel is provided with a second air inlet and a second air outlet; the thick mixed air scavenging channel and the thin mixed air scavenging channel are arc-shaped and clung to the inner walls of two sides of the crankshaft chamber; a first scavenging port and a second scavenging port are formed in the combustion acting chamber; the first scavenging port is far away from the exhausting port and communicates with the first air outlet; the second scavenging port is close to the exhausting port and communicates with the second exhausting port; a first oil stopping rib and a second oil stopping rib are correspondingly arranged on the thick mixed air scavenging channel and the thin mixed air scavenging channel. According to the system, a layered scavenging state can be formed, so that the content of harmful components in exhaust gas can be reduced, and as a result, the environment can be protected; the consumption of oil in use can be saved.
Owner:ZHEJIANG SAFUN IND
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com