37results about How to "Variable compression ratio" patented technology

An improved turning point system and method for performing data compression is disclosed. The system improves the conventional turning point compression method by selecting a predetermined number of the "best" turning points in the sample window including data samples X0 and XN. From this sample-window, ones of the data samples X1 through X(N-1) will be identified as turning points using a selected one of a disclosed set of turning point detection methods. In one embodiment, a turning point is identified by determining that the slopes in the lines interconnecting adjacent data points have different polarities. In an alternative embodiment, a data sample XM is considered a turning point if the slope of the line between the data samples XM and X(M+1) has a different polarity as compared to the slope of the last waveform segment that was encountered that did not have a slope of zero. According to one mechanism, amplitude thresholding is used to detect whether an identified turning point is likely the result of noise such that the turning point status of the data sample should be disregarded. After data samples are identified as turning points, ones of the identified turning points are identified as the "best" turning points to be selected for retention. The best turning points may be identified by determining which waveform segment included within a sample window has the largest change of amplitude. An alternative embodiment detects which of the turning points has the greatest signal amplitude compared to a reference value. Yet another embodiment selects as the best turning point that point having an amplitude that differs the most from the amplitude of the first data sample in the sample window. Still other embodiments retain the turning point having an amplitude which is more positive, or alternatively, more negative, than the other data samples. According to one aspect of the invention, the compression ratio varies based on the frequency of the input waveform. In another embodiment, position data is retained to indicate the relative position of retained data samples as compared to the position of other retained data samples. This position data may be calculated at a frequency that is less than the frequency of the sampled data.

An internal combustion engine is adapted for operation with homogeneous combustion and compression ignition. The engine includes plural cylinders with the piston in each cylinder defining the main combustion chamber and connected to a crankshaft for reciprocating motion rotatably driving the crankshaft. An auxiliary combustion chamber and an inlet passage are formed in the engine head for each of the cylinders with a control valve for controlling communication between the main combustion chamber and the auxiliary combustion chamber and an inlet valve for controlling communication between the main combustion chamber and the inlet passage. The inlet valve is driven with rotation of the crankshaft, while the drive for the combustion control valve is independent of angular position of the crankshaft and has its own controller for timing its opening and closing to provide controlled homogeneous combustion.

The invention discloses an opposite-piston, two-stroke and variable-compression-ratio type gasoline engine, and relates to the field of internal combustion engines. The gasoline engine comprises a cylinder body, a gear synchronizing mechanism, a first spark plug, a second spark plug, a gasoline injector and a motor, wherein the cylinder body is connected with the gear synchronizing mechanism through a crankshaft; the first spark plug, the second spark plug and the gasoline injector are arranged on the outer circumferential wall of the cylinder body; the gear synchronizing mechanism provided with a gas feeding side gear and a gas exhausting side gear is connected to the motor; the gas feeding side gear is connected with a gas feeding side crankshaft; the gas exhausting side gear is connected with a gas exhausting side crankshaft; at least two intermediate gears are arranged between the gas feeding side gear and the gas exhausting side gear; the gas feeding side gear, the intermediate gears and the gas exhausting side gear which are engaged with each other are connected through connecting plates. According to the opposite-piston, two-stroke and variable-compression-ratio type gasoline engine, the movement phase difference of opposite pistons can be changed through the gear synchronizing mechanism, so that the cylinder working capacity can be changed when the opposite pistons are positioned at inner stopping points and outer stopping points, and as a result, the compression ratio of the gasoline engine in working can be varied.

The invention relates to a stretching type compression ratio variable device, and belongs to the technical field of internal combustion engines. The stretching type compression ratio variable device comprises an air cylinder, a cylinder cover, a piston, a first piton ring, a second piston ring, a connecting rod, a volume cavity, a moving body and a spring, wherein the cylinder cover is arranged at the upper end of the air cylinder; the piston is arranged inside the air cylinder; a combustion chamber is formed by the air cylinder, the cylinder cover and the piston together; the first piston ring and the second piston ring are respectively arranged on the top of the piston; the connecting rod is connected with the piston together; the volume cavity is arranged on the top of the piston; the moving body is arranged inside the volume cavity; the two ends of the spring are respectively connected with the lower end face of the moving body and the lower end face of the volume cavity. Under a high-speed working condition, when the pressure inside the combustion chamber is maximum and the combustion pressure is higher, the moving body moves downwards, and the volume of the combustion chamber becomes larger; under a low-speed working condition, when the pressure inside the combustion chamber is maximum and the combustion pressure is lower, the moving body moves upwards, and the volume of the combustion chamber becomes smaller. The stretching type compression ratio variable device is reasonable in structure and simple in design, and is suitable for the optimal design of the compression ratio of an engine.

Systems and methods are provided for varying a compression ratio in an engine having a pressure reactive piston. The pressure reactive piston may include a piston crown, and a spring positioned within the piston crown, wherein the spring includes a first ring, a second ring comprising a plurality of apertures, a rolling element positioned within each of the plurality of apertures, and a third ring. The first ring, the second ring, and the third ring of the spring may be arranged concentrically and the second ring may be positioned between the first ring and the third ring.

The invention relates to a reciprocating engine in a motor vehicle, comprising a coupling arrangement for transmission of a torque, from a crank shaft end, to a crank shaft flange supported in a cylinder block, the crank shaft end being movable in the radial direction with respect to the crank shaft flange, characterised in that the crank shaft end and the crank shaft flange together form an axially extended cavity adapted to contain the coupling arrangement.

The invention discloses a variable-compression-ratio mechanism of an engine and an air distribution system matched with variable-compression-ratio mechanism. An inner cavity is formed in the center position of the top of an air cylinder cover to serve as a hydraulic cylinder barrel. A piston cover is fixed to the top of the hydraulic cylinder barrel, and a hydraulic cylinder inner sleeve is arranged at the bottom of the center of the piston cover. An annular piston body is arranged in the hydraulic cylinder barrel in a sealed and sleeved manner. An upper oil cavity and a lower oil cavity are formed in the upper end and the lower end of the piston body correspondingly and communicate with an oil inlet pipe and an oil outlet pipe correspondingly. A spark plug installation head is arranged at the bottom of the annular piston body and is fixedly connected with a spark head. The compression ratio of the variable-compression-ratio mechanism can be adjusted in a stepless manner; the engine adopting the variable-compression-ratio mechanism is suitable for multi-fuel driving; emission can be better reduced; running stability is improved; torque is improved; implementation is simple, convenient and feasible; and the construction cost is low.

The invention relates to a reciprocating engine in a motor vehicle, comprising a coupling arrangement for transmission of a torque, from a crank shaft end, to a crank shaft flange supported in a cylinder block, the crank shaft end being movable in the radial direction with respect to the crank shaft flange, characterised in that the crank shaft end and the crank shaft flange together form an axially extended cavity adapted to contain the coupling arrangement.

The invention discloses a variable compression ratio engine which comprises an ECU (electronic control unit), a compression ratio sensor, a crank shaft, a connecting rod, a piston and the like, wherein crank shaft sleeves are sleeved on the crank shaft; one end of the connecting rod is rotatably connected with a neck bush, and the other end of the connecting rod is connected with the piston through a piston pin; two crank sleeves on each group of crank shaft sleeves are respectively installed in the manipulation holes of two manipulation sleeves; the crank shaft sleeves are controlled through regulating the manipulation sleeves; and the distance between a main journal and the neck bush is changed when the piston is at the top dead center though the upward or downward motion of the crank shaft sleeves along the central line of a cylinder body, thereby changing different compression heights when the piston is at the top dead center to realize different compression ratios. By adopting the technical scheme provided by the invention, the control can be carried out according to the air inlet charge and various loading working conditions as well as different compression ratios required by various fuels, so that the compression ratio of the motor is mostly matched with the current condition to achieve the optimum effect of fuel economy, dynamic property and emission, and the selections of fuel materials for one motor are wider.

A variable compression ratio apparatus is provided and is installed within an engine rotating a crankshaft upon receiving combustion power of a mixture from a piston and changes a mixture compression ratio based on an engine driving condition. The apparatus includes a connecting rod at which a small end forming a circular aperture to be rotatably connected with a piston pin moving together with the piston, a larger end rotatably connected with a crankpin eccentrically arranged with respect to the crankshaft, and an acting oil passage formed to supply hydraulic pressure from the larger end to the small end, are formed. An eccentric cam is concentrically arranged and rotatably disposed in the small end aperture and the piston pin is eccentrically inserted thereinto and is rotatably connected therewith. A latching pin selectively latches the small end with the cam by supply of hydraulic pressure through the acting oil passage.

The invention relates to a movable multipart piston device belonging to the technical field of an internal combustion engine. The movable multipart piston device comprises an air cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, a volume cavity, a spring and movable bodies, wherein the volume cavity is formed in the top of the piston, the movable bodies are all distributed in the volume cavity, a first movable body is arranged above a second movable body, a third movable body is arranged above a fourth movable body, and the lower end surface of the first movable body, the upper end surface of the second movable body, the lower end surface of the third movable body and the upper end surface of the fourth movable body are respectively of a slope structure. Under a high speed working condition, when pressure in a combustion chamber is highest and the combustion pressure is relatively high, the second movable body moves rightwards, the fourth movable body moves leftwards, and the volume of the combustion chamber is increased; under the low speed working condition, when the pressure in the combustion chamber is highest and the combustion pressure is relatively small, the second movable body moves leftwards, the fourth movable body moves rightwards, and the volume of the combustion chamber is reduced. The movable multipart piston device is reasonable in structure, simple in design and applicable to the optimized design of an engine piston.

The invention relates to a multi-cascaded double-cylinder linear compressor, and belongs to the field of energy power. The multi-cascaded double-cylinder linear compressor comprises double-cavity compression cylinders, a linear motor and cascading pipes. Each cylinder is composed of a cylinder cover and a cylinder body and is divided by a double-sided piston into two air cavities (a first-stage compression cavity and a second-stage compression cavity), wherein the two air cavities communicate with each other through the corresponding cascading pipe; and the double-sided piston is driven by thelinear motor to reciprocate to continuously change the volumes of the two air cavities, so that first-stage compression and second-stage compression are completed. Series connection and parallel connection of the multi-cascaded double-cylinder linear compressor are completed through different connection manners of the cascading pipes, and thus, variable-pressure ratio and variable-displacement output is achieved. According to the multi-cascaded double-cylinder linear compressor, the structure of the high-pressure compressor is simplified; and a multi-cascaded reciprocating-type linear compressor system is a resonant system, so that the energy utilization rate is increased.

A suspended type compression ratio variable device belongs to the technical field of internal combustion engines and comprises an air cylinder a cylinder cover, a piston, piston rings, a connecting rod, a volume cavity, hanger plates, springs and a moving body, wherein the volume cavity is arranged in the center of the piston; the first hanger plate and the second hanger plate are both arranged at the top end of the volume cavity; the moving body is arranged in the volume cavity; and the two ends of the moving body are connected with the first hanger plate and the second hanger plate through the first spring and the second spring respectively. Under a high speed working condition, when the highest combustion pressure in a combustion chamber is higher, the moving body moves down, and the volume of the combustion chamber is increased; and under a low speed working condition, when the highest combustion pressure in the combustion chamber is lower, the moving body moves down, and the volume of the combustion chamber is reduced. The suspended type compression ratio variable device is reasonable in structure, simple in design and applicable to the optimization design of the engine compression ratio.

The invention discloses an energy-saving compression ignition engine with continuously variable compression ratio and flexible operation. The energy-saving compression ignition engine with continuously variable compression ratio and flexible operation comprises a fuel supply system, a combustion system and a flexible operation adjusting system, wherein the fuel supply system comprises an oil tank,a filter, an oil injection pump, an electric control oil injector and an energy accumulator. The combustion system comprises an intake valve, a cylinder block, a telescopic cylinder head, an exhaustvalve, a piston, a connecting rod and a crank. The flexible operation adjusting system comprises an oil inlet, an oil outlet, a cylinder head oil storage cavity, a return spring, an electromagnetic clutch, a controller, a temperature sensor and a pressure sensor. The cylinder head oil storage cavity is formed in the telescopic cylinder head, and the return spring and the electromagnetic clutch areuniformly distributed in the cylinder head oil storage cavity in the circumferential direction. The energy-saving compression ignition engine with continuously variable compression ratio and flexibleoperation has simple structure, simple and feasible adjustment method and high working reliability, fully meets the requirements of high and low load and other working conditions of the engine on combustion parameters such as compression ratio, combustion pressure and combustion temperature, has wide application range, and has good energy saving effect and emission reduction effect.

The present invention provides an actuator that can realize the different compression ratios of the rotary engine. The invention actuator described above, includes three parts: the eccentric shaft part, the triangle rotor part and the control system. The eccentric shaft part which is described above, includes the front part of the eccentric shaft, the combination of electric three jaw and the rear part of the eccentric shaft. The triangle rotor part which is described above, includes the variable volume actuator, the front part of the rotor and the rear part of the rotor. The control system which is described above, includes the control system of electric three jaw and the rotating joint. The expansion and contraction of the electric three jaw described above, are controlled by the control system of electric three jaw described above. The eccentric shaft part described above passes through the triangle rotor part described above, to make the combination of electric three jaw to arrange in the annular groove described above. The reciprocating motion of the variable volume actuator described above, is controlled by the expansion and contraction of the claw top of the electric three-jaw. The invention can adjust the engine compression ratio through the whole compression ratio adjustment system, to make the rotary engine always work in the best compression ratio under different working conditions. Therefore, the invention can improve the performance of rotary engine significantly.

Systems and methods are provided for varying a compression ratio in an engine having a pressure reactive piston. The pressure reactive piston may include a piston crown, and a spring positioned within the piston crown, wherein the spring includes a first ring, a second ring comprising a plurality of apertures, a rolling element positioned within each of the plurality of apertures, and a third ring. The first ring, the second ring, and the third ring of the spring may be arranged concentrically and the second ring may be positioned between the first ring and the third ring.

The invention belongs to the technical field of internal combustion engines, and discloses a piston system with a volume cavity formed inside. The piston system comprises an air cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, the volume cavity, a spring, moving bodies and a penetrating hole. The volume cavity is formed inside the piston. The first moving body, the second moving body, the third moving body and the fourth moving body are all arranged in the volume cavity, and the lower end face of the third moving body, the upper end face of the first moving body, the lower end face of the fourth moving body and the upper end face of the second moving body are each of a slope structure. Under the high speed working condition, when the highest combustion pressure in a combustion chamber is high, the first moving body moves rightwards, the second moving body moves leftwards, and the volume of the combustion chamber is increased; under the lower speed working condition, when the highest combustion pressure in the combustion chamber is low, the first moving body moves leftwards, the second moving body moves rightwards, and the volume of the combustion chamber is decreased. The piston system is reasonable in structure, simple in design and suitable for optimization design of engine pistons.

A variable compression ratio device and an internal combustion engine are disclosed. The variable compression ratio device includes a main piston that moves in a reciprocating manner, a main combustion chamber having a volume that is varied by the main piston, a sub-compression chamber communicating with the main combustion chamber; a sub-piston configured to reciprocate in the sub-compression chamber to vary a volume of the sub-compression chamber; and a sub-piston reciprocating unit that reciprocates the sub-piston. Accordingly, the air-fuel ratio and output of the internal combustion engine can be improved.

The invention provides an automobile engine development and test system. The automobile engine development and test system comprises a dynamometer, a vacuumizing device, a high-pressure oil supply device, a combustion analyzer, an air inlet pressure control device and a control device, the dynamometer is in transmission connection with the single-cylinder engine through a transmission shaft; the vacuumizing device is connected with an engine crankcase; the high-pressure oil supply device is communicated with an air inlet of the single-cylinder engine so as to provide required oil supply pressure; the combustion analyzer is communicated with a combustion chamber of the single-cylinder engine so as to collect combustion data; the air inlet pressure control device is communicated with an air inlet of the single-cylinder engine, so that the air inlet pressure of the single-cylinder engine is adjusted; the control device is electrically connected with the dynamometer, the high-pressure oil supply device, the combustion analyzer and the air inlet pressure control device; by the adoption of the scheme, the engine design scheme with the most cost performance is obtained by integrating technology combination comparison tests of variable compression ratio, variable air inlet tumble ratio, variable valve timing lift and the like, and the engine design scheme has the advantages of being short in development period and low in development cost.

The improved-type internal combustion engine combustor is made up of exhausting valve needle; a part of exhaust pipe; variable lift stop bar; offset friction upper link rod and inertial spring. It has advantage of adjustable internal space of combustion room and capable of discharging empty of waste gas. It is adapted to using in internal combustion engine system.

A split-cycle internal combustion engine includes a variable displacement compressor having two or more cylinders, an adjustment mechanism for varying the displacement volume of the compressor and possibly the phase between the compressor and the motor, and a rotary motor having two or more expansion chambers. A passage valve system located between the compressor and the motor transfers working fluid and combustion exhaust products, and, in addition, mechanically and thermally isolates the compressor from the high pressures and temperatures present in the motor.

The invention provides a rotating mechanism type adjusting system for engine displacement, and belongs to the technical field of internal combustion engines. The system comprises a cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, a volumetric chamber, a spring, a rotating body, a rotating shaft and a through hole; the volumetric chamber is formed in the piston, and the left end of the volumetric chamber communicates with the top part of the piston through the through hole; the rotating shaft is embedded into the piston; the rotating body is arranged in the volumetric chamber and is integrally fixedly connected with the rotating shaft, wherein the rotating body is integrally connected with the piston through the spring; when the pressure in a combustion chamber reaches the top value and the combustion pressure is relatively high under a high-speed working condition, the rotating body anticlockwise rotates, and then the volume of the combustion chamber is increased; when the pressure in the combustion chamber reaches the top value and the combustion pressure is relatively low under a low-speed working condition, the rotating body clockwise rotates, and the volume of the combustion change is reduced. The system is reasonable in structure, simple in design, and suitable for the optimal design of the engine piston.

The invention relates to a multi-cascaded double-cylinder linear compressor, and belongs to the field of energy power. The multi-cascaded double-cylinder linear compressor comprises double-cavity compression cylinders, a linear motor and cascading pipes. Each cylinder is composed of a cylinder cover and a cylinder body and is divided by a double-sided piston into two air cavities (a first-stage compression cavity and a second-stage compression cavity), wherein the two air cavities communicate with each other through the corresponding cascading pipe; and the double-sided piston is driven by thelinear motor to reciprocate to continuously change the volumes of the two air cavities, so that first-stage compression and second-stage compression are completed. Series connection and parallel connection of the multi-cascaded double-cylinder linear compressor are completed through different connection manners of the cascading pipes, and thus, variable-pressure ratio and variable-displacement output is achieved. According to the multi-cascaded double-cylinder linear compressor, the structure of the high-pressure compressor is simplified; and a multi-cascaded reciprocating-type linear compressor system is a resonant system, so that the energy utilization rate is increased.

The invention relates to a compression ratio self-adaptation system and belongs to the technical field of an internal combustion engine. The compression ratio self-adaptation system comprises a cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, a volume cavity, a spring and moving elements, wherein the volume cavity is arranged in the piston; a first moving element is arranged at the left end of the lower part of the volume cavity; a second moving element is arranged at the right end of the lower part of the volume cavity; the first moving element and the second moving element are connected through the spring; outer wall surfaces of the first moving element and the second moving element are in sealing contact with the inner wall surfaces of the volume cavity; under a high-speed working condition, when pressure in a combustor is highest and combustion pressure is higher, the two moving elements are moved back to back and the volume of the combustor becomes big; under a low-speed working condition, when the pressure in the combustor is highest and the combustion pressure is lower, the two moving elements are moved face to face and the volume of the combustor becomes small. The compression ratio self-adaptation system is reasonable in structure, simple in design and fit for the optimal design for the engine compression ratio.

The invention discloses a piston device having a volume cavity in the top, and belongs to the technical field of internal combustion engines. The piston device comprises a cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, the volume cavity, a spring and mobile bodies, wherein the volume cavity is formed in the top of the piston, and is divided into left and right two parts; first and second mobile bodies are both arranged in the volume cavity; the first mobile body is arranged above the second mobile body; the lower end surface of the first mobile body, the upper end surface of the second mobile body and the upper end surface of the right part of the volume cavity are all slope structures; and the lower end surface of the first mobile body and the upper end surface of the second mobile body are in sealing contact. Under the working condition of high speed, when the pressure is the highest and the combustion pressure is higher in a combustion chamber, the second mobile body moves to the right side, the first mobile body downwards moves, and the volume of the combustion chamber is increased; and under the working condition of low speed, when the pressure is the highest and the combustion pressure is lower in the combustion chamber, the second mobile body moves to the left side, the first mobile body upwards moves, and the volume of the combustion chamber is decreased. The piston device is reasonable in structure and simple in design, and is suitable for optimal design of engine pistons.

A variable compression ratio rotor engine with reciprocating circular arc motion belongs to the field of mechatronics and includes a wet clutch, an angular displacement sensor, a transmission gear, a reversing shaft and the like. It is characterized in that: the angular displacement sensor can continuously detect the rotation angle of the rotor relative to position B, and when the on-board ECU judges that the angle reaches the angle set by the system, it controls the hydraulic system to connect or disconnect each wet clutch, and switches the transmission route, so that The reciprocating arc motion of the rotor is converted into the one-way circular motion of the output shaft. At the same time, the on-board ECU can judge whether it is necessary to change the engine compression ratio according to the driving conditions of the vehicle. When the compression ratio needs to be changed, the on-board ECU changes it according to the model preset by the vehicle. The maximum angle value that the rotor can rotate currently set by the system makes the maximum angle that the engine rotor can rotate different, the total volume of the cylinder changes, but the volume of the combustion chamber remains unchanged, so that the compression ratio is variable. The invention has the advantages of realizing variable compression ratio of the rotary engine, wide range of compression ratio and large maximum compression ratio.