56 results about "Combustion analysis" patented technology

A method and apparatus that applies corrections to the mass flow rate of combustion air into a gas or oil-fired, forced-draft burner, and thus provides for correcting the air-fuel ratio, by directly measuring the combustion air temperature and / or the barometric pressure of the combustion air, and using these measurements to develop a fan speed drive signal that corrects the volume of air inlet to the burner system without the use of the complex and expensive fully metered control systems, or elaborate feedback systems, or systems that require real-time combustion analysis, and the like.

The invention discloses an experiment system and method for stimulating the combustible matter smoldering reactions. The experiment system comprises a smoldering environment system for providing a smoldering environment, a smoldering reaction system for carrying out combustible matter smoldering reactions, and a smoldering process monitoring system for monitoring the heating temperature and the internal temperature of the combustible matter during the experiment process; wherein the smoldering environment system and the smoldering reaction system are connected through a gas supply pipeline; and the smoldering environment system comprises a gas environment adjusting device for adjusting the oxygen gas concentration and a heating environment adjusting device for adjusting the heating time. The experiment system can also comprise a smoke condensation sampling system, a gas chromatography (GC), a combustion analyzer, and the like. The provided system and method can be used to stimulate the typical combustible matter smoldering reactions, and the influence factors such as heating time, oxidant flow, oxygen gas concentration, and the like can be adjusted in the experiment system, so that people can research the typical combustible matter smoldering reactions more comprehensively.

A traversable, fiber-optic probe design for flow-related measurements in a production-car IC engine during normal operating conditions may be fitted into an M8 spark-plug hole and traversed as much as 50 mm in an axial direction of the spark plug, allowing measurements inside the engine cylinder including the spark plug location. Components of the laser-based system include on-table optics used to generate laser beams and a data acquisition and reduction system used to extract the information measured from the signal produced by the fiber-optic probe.

This invention relates to an automatic system used in collecting and analyzing the combustion pressure data in the cylinder of a lower-middle speed engine connected by a pressure sensor, a Hall sensor, an upper dead point gear disk, a signal amplifier, a terminal board, a data collection card and a PC, in which, said system amplifies the pressure signal in the cylinder collected by the pressure sensor by a signal amplifier and cuts in it together with the signal of the upper dead point collected by the Hall sensor to the terminal board then collects the signals into the PC set by a high speed collecting card and the software of the data collection and combustion analyzing system mounted in the PC set displays the collected signal waveforms to compute curves of combustion heat discharge rate, heating volume and the temperature in the cylinder.

With a device for combustion analysis, comprising an induction furnace with a furnace chamber, in which carrier gas can flow during operation via at least one gas inlet to a gas outlet, and in which a sample to be analyzed can be arranged and burned in a sample container, a hollow protective element is provided and, with normal operation of the device, is arranged in the furnace chamber directly above the sample in such a way that the end of the protective element facing towards the sample, together with the sample container, forms a constriction for the carrier gas flow, wherein the protective element is desgned to convey gases produced during the combustion of the sample through the protective element and to the gas outlet.

The invention discloses a portable automobile exhaust analyzer based on state IV standards, which consists essentially of an ARM microcontroller module, a human-computer interaction module, a sensor module, an external expansion interface module, a combustion analysis and fault diagnosis module and the like, wherein the ARM microcontroller module is respectively connected with the human-computer interaction module, the sensor module, the external expansion interface module and the combustion analysis and fault diagnosis module; and the invention fully complies with relevant national standards, has high accuracy and good dynamics, is applicable to the real-time measuring and analyzing of automobile exhaust for the institutions such as scientific research institutions, exhaust detecting stations, environmental protection departments and the like, and simultaneously is characterized by simple and convenient operation, low cost and the like. The advanced instrument and technology are utilized to strengthen the detection of automobile emission pollutant so as to further accurately monitor the automobile emission pollutant level, thus having important significance in making pollution control policies, improving the ambient air quality and guaranteeing the health of people.

A method and apparatus for combustion analysing a sample in a combustion analyzer (120,160,180), where the sample comprises a proportion of sulphur. The sample is supplied to the combustion analyzer and combusted to produce combustion products, comprising a yield of sulphur dioxide for detection. Nitrogen monoxide or a source of nitrogen monoxide is supplied to the combustion analyzer to improve the yield of sulphur dioxide in the combustion products. The yield improver may be supplied before and / or during the combusting step. A proportion of yield improver is preferably greater than the (expected) proportion of sulphur. Ozone may be supplied to the combustion products to convert at least a proportion of any nitrogen monoxide in the combustion products to nitrogen dioxide, before detection.

The present invention discloses an engine transient state discharge test analysis system and method. The system comprises a discharge device, a drum test bed control system, a drum test bed, a test vehicle, a combustion analyzer, an electronic injection parameter collection unit, a data analysis unit, a lower computer and cylinder pressure sensors. Two probes of the discharge device are respectively installed at front and back sides of a catalyst of a test vehicle, and the discharge device is connected with the drum test bed control system; the drum test bed is connected with the drum test bedcontrol system; the drum test bed control system is connected with the data analysis unit; the cylinder pressure sensors are respectively installed at cylinders, each cylinder pressure sensor is connected with the combustion analyzer, and the combustion analyzer is connected with the data analysis unit; the electronic injection parameter collection unit is connected with a vehicle ECU and a dataanalysis unit; and the data analysis unit is connected with the lower computer. The engine transient state discharge test analysis system and method can directly perform associated measurement and analysis of a discharge result in a whole vehicle work condition and a combustion result of the engine.

The invention relates to a burner for researching an oscillation combustion characteristic of metal particles, in particular to combustion of the metal particles in oscillation air currents, and belongs to the field of unstable combustion. The burner consists of a horn sounder, a horn port cover, an opposite hole joint, a metal joint, a porous medium, a stainless steel cold pipe and the like. The burner uniquely adopts the horn generator to provide external acoustic excitation, and can simulate the combustion condition of aluminum powder under a low-frequency oscillation environment; and as the combustion of the aluminum powder in a solid engine is in a low-frequency acoustic oscillation environment, the simulation environment is more appropriate, and the obtained result provides more reliable theory basis for unstable combustion analysis in the solid engine. The burner adopts a premixed fuel to replace a propellant, so that the safety is improved; the combustion condition of the added aluminum powder can be directly observed in the burner; and the burner can be repeatedly experimented. The burner is excellent in use value on future research of unstable combustion of the metal parts in the oscillation air currents.

A traversable, fiber-optic probe design for flow-related measurements in a production-car IC engine during normal operating conditions may be fitted into an M8 spark-plug hole and traversed as much as 50 mm in an axial direction of the spark plug, allowing measurements inside the engine cylinder including the spark plug location. Components of the laser-based system include on-table optics used to generate laser beams and a data acquisition and reduction system used to extract the information measured from the signal produced by the fiber-optic probe.

The invention relates to an optical synchronizing signal labeling system for optical diagnosis of a combustion system of an internal-combustion engine, comprising a labeling code disc, image acquisition equipment and a connection fixing mechanism; a light guide device and a laser tube are respectively arranged on the connection fixing mechanism, the laser beam inlet end of the light guide device and the laser beam transmitting terminal of the laser tube are oppositely arranged, the laser beam output end of the light guide device is toward to the image acquisition equipment, and two labeling holes are arranged on the labeling code disc; the labeling system has simple structure, and has no time-delay problems of circuits and optical-to-electrical conversion, and has no delay of optical signals; under a condition that the rotating speed of the engine caused by combustion is fluctuated instantaneously, accurate correction computation does not need aiming at the rotating speed, so as to ensure the brightness of the optical signals, be convenient for regulation, improve the signal synchronizing precision and the combustion analysis reliability, be suitable for a visual experiment rack of the internal-combustion engine structure which is frequently reconstructed or regulated and have great significance to the visual research in an internal-combustion engine cylinder.

Described is a new high-throughput method to measure a carbon containing compounds solubility. It centers on measuring the carbon dioxide gas released during the combustion of a saturated solution. The amount of carbon present (which is related to the carbon dioxide gas released) will be directly related to the amount of drug dissolved in the solution. This method can be automated to allow for a high throughput. An advantage of this present invention is that if the chemical formula of the compound is known, then no reference sample is required as in the case of other similar methods.

The invention discloses a correcting method of the crank angle value of the combustion cylinder pressure testing curve of a reciprocating engine. In the shut-down state, the diesel engine 10 is moved to the theoretically top dead center position of an air cylinder to be measured through a jigger, thin sheet iron 6 is bonded onto a timing disk 11, a pulse sensor 7 is installed above the sheet iron 6, and the other end of the sensor 7 is connected into a combustion analysis meter 9. The diesel engine 10 is adjusted to be in the working condition in need of measurement, a fuel pump rack of the air cylinder to be measured is pulled up, and the curve generated by software in the combustion analysis meter 9 and a pulse signal of the pulse sensor at the moment are obtained. The angle value of the pulse signal is a, the angle position of the maximum cylinder pressure is b, the corrected crank angle value of the combustion cylinder pressure testing curve is -b+a, and therefore the position of the actual crank angle corresponding to the combustion cylinder pressure curve can be located accurately.

The invention relates to a sample machining device, in particular for preparing samples for OES and / or XRF and / or combustion analyses, having at least one sample holder, and to provide a development which is advantageous in use proposes that the machining device includes a cylindrical milling cutter, the cylindrical milling cutter and the sample holder being movable relative to one another in such a manner that a sample which can be held in the sample holder can be divided by means of the cylindrical milling cutter to produce a free piece and a remainder piece of the sample which can still be held in the sample holder, and that at least one additional tool, in particular a drilling or separate milling tool, is provided in order to produce chips from the remainder piece of the sample. Moreover, the invention relates to a sample analysis device in which, according to the invention, the abovementioned sample machining device and means for carrying out OES analysis and / or XRF analysis and / or combustion analysis are provided.

The invention relates to an engine cylinder internal combustion measurement system and its measurement method. The system comprises an optical signal acquisition module, an optical fiber amplifier, a combustion analyzer and a signal processing module. The optical signal acquisition module is connected with the optical fiber amplifier through an optical fiber conduction wire and can send signals acquired by the optical signal acquisition module to the optical fiber amplifier. The optical fiber amplifier is communicatively connected to the combustion analyzer for amplifying the signals and sending the signals to the combustion analyzer. The combustion analyzer is communicatively connected to the signal processing module for transmitting signals thereto; the signal processing module is used for receiving and processing the signals. According to the invention, it is possible to directly acquire the transmission speed of flames inside the engine cylinder and the position of detonation. Based on the position of detonation and the transmission speed of the then flames, a designer can find out the explicit reasons for the detonation, such as the design for the cooling system, the air flow, and the hot spots in the combustion chamber, etc. Improvements can be made acting on these reasons to raise the phase of a set fire, increase the output performance and reduce oil consumption of the engine.

The invention provides a fuel injector needle valve displacement curve prediction method for a jerk fuel injection system. According to the motion characteristics of a fuel injector needle valve and the pressure fluctuation characteristics of a fuel pressure curve, the opening and closing phases of the needle valve are determined, and the delay of pressure waves is then calculated to obtain a displacement curve of the needle valve. A needle vale displacement sensor can be replaced, the problems of the displacement sensor, such as difficulty in installation and high cost, are solved, and the objectives of combustion analysis, fault diagnosis and feedback control carried out on an engine are achieved.

The invention discloses a cabin type diesel engine plateau low-temperature starting test device and method. A test chamber of the device is connected with a vacuum pump through a chamber penetrating pipeline, the test chamber is connected with a refrigerating unit II through a pipeline, and a refrigerating unit I is connected with a fan through a pipeline. An exhaust radiator is sequentially connected with an exhaust buffer tank, a vacuum pump and an oil-water separator; a diesel engine starting storage battery is connected with a diesel engine; an accelerator actuator is connected with an engine oil supply system and a control and data acquisition module; the two ends of a combustion analyzer are connected with engine exhaust and control and a data acquisition module respectively; an ECU and the data acquisition module are respectively connected with a display terminal; a fuel heater is connected with a fuel tank through an oil pipeline with an oil pump; and the exhaust is connected with a diesel engine exhaust pipe through a pipeline. The device and the method can be used to carry out diesel engine starting performance test and evaluation at different altitudes and different temperatures, and have the characteristics of short test period, good repeatability and the like.

The invention discloses a detection system for determining valve opening and closing moments. The detection system comprises a cylinder pressure sensor and a displacement sensor which are used for being installed on a cylinder cover of an engine, an electronic corner mark instrument used for being installed at the front end of a crankshaft of the engine, and a combustion analyzer connected with the cylinder pressure sensor, the displacement sensor and the electronic corner mark instrument. According to the detection system for measuring opening and closing moments of an engine valve in the invention, the non-contact eddy current displacement sensor is matched with the electronic angle marking instrument at the front end of the crankshaft to collect the valve lift of the engine in the ignition state, the valve opening and closing moment of the engine in the ignition state is accurately measured, and the accuracy of valve opening and closing measurement of the engine in the ignition state is guaranteed.

The invention discloses a cylinder interior sampling method two-stroke engine scavenging efficiency testing system acting on an air cylinder. An oil atomizer is arranged on the top of the air cylinder. A sampling probe is arranged on the top of an air cylinder combustion chamber and connected with a sampling head. The sampling head is connected with a combustion analyzer and a computer end througha control cabinet. A testing method is further disclosed and comprises the steps that the pressure and the temperature of the sampling probe are set at the computer end, the negative pressure existsin the sampling probe relative to the interior of the combustion chamber so that sample collection can be continuously conducted, and collected gas samples are conveyed to the sampling head for real-time analysis; and through comparison of the volume concentration of carbon dioxide before combustion and the volume concentration of carbon dioxide after complete combustion, the scavenging efficiencyof a two-stroke engine is finally determined. The cylinder interior sampling method two-stroke engine scavenging efficiency testing system is high in measuring precision, simple in structure and capable of calculating the volume concentration of carbon dioxide in the cylinder.

The invention discloses a gasoline engine high-pressure oil pump driving cam phase measuring method and system and a storage medium. The method comprises the following steps: measuring the rotating angle of an engine crankshaft through an angle marker, measuring the cam lift through a displacement sensor, and outputting a cam lift signal; measuring the pressure in an engine cylinder through a cylinder pressure sensor and outputting a cylinder pressure signal; acquiring a compression top dead center position of a cylinder piston of the engine through a cylinder pressure sensor, and defining thetop dead center position as 0 degree; making a cam lift signal and a cylinder pressure signal connected into a lower computer combustion analyzer and uploaded to an upper computer, measuring the angle position of the top dead center of the oil pump cam through the upper computer and realizing measurement of the phase of the oil pump cam. Compared with the prior art, existing resources are effectively utilized, the phase measurement precision of the gasoline engine high-pressure oil pump driving cam is improved, the labor intensity is reduced, the test time is shortened, and the working efficiency is improved.

The invention relates to a secondary air closed-loop optimization control system based on an air register resistance coefficient. The secondary air closed-loop optimization control system comprises a secondary air precise control module used for building a mapping relation between the secondary air register opening degree and the air volume of each layer, a boiler combustion analysis module used for obtaining a characteristic value of a boiler combustion boundary and a characteristic value of a combustion effect, an intelligent modeling module used for establishing a neural network model between the characteristic value of the boiler combustion boundary and the characteristic value of the combustion effect, an optimization module used for obtaining an optimal solution through an optimization algorithm based on the established neural network model, and a closed-loop control module used for acquiring parameters in real time, inversely calculating the optimal value of the boiler secondary air register opening degree after the parameters are processed by the boiler combustion analysis module and the optimization module, and executing closed-loop control in a DCS. The secondary air closed-loop optimization control system can conduct dynamic real-time optimization to adapt to the change of the load, coal quality and operation mode of a power station boiler, and can greatly improve the automation level of the boiler, effectively improve the efficiency of the boiler and reduce the NOx emission concentration of a hearth outlet.

The invention discloses an optical engine control method and a device. According to the control method and the device, subsystem data sharing is facilitated, the flexibility is high, the control strategy can be rapidly achieved, the universality is high, and adjustment is easy. Data sharing among different subsystems such as sensors, actuators, combustion analyzers, data acquisition systems, dynamometers and the like which can be used for different interfaces can be slightly modified according to signal characteristics, and results are convenient to store, analyze, display and process. Due tothe fact that the high-performance single-chip microcomputer is adopted, complex real-time signals can be processed conveniently, and when EGR and VVT control is needed, a control strategy algorithm can be achieved conveniently through model modification.

The invention discloses a crankshaft corner mark signal acquisition system suitable for 165-series engine combustion analysis. In the crankshaft corner mark signal acquisition system, the upper end ofa torsional vibration transmission arm is connected with the free end of a crankshaft; a laser fluted disc is installed at the lower end of the torsional vibration transmission arm; a fluted disc pressing flange is pressed on the laser fluted disc; a laser sensor installing and adjusting device comprises a laser sensor correcting supporting frame and an installing structure with a self-tighteningoil seal; the installing structure with the self-tightening oil seal is connected with the torsional vibration transmission arm in a sleeving fitting mode; a laser sensor is installed on a sliding bracket; and a fixing supporting frame is fixed to a disk of the installing structure with the self-tightening oil seal, and the sliding bracket is fixed to the fixing supporting frame. The crankshaft corner mark signal acquisition system suitable for the 165-series engine combustion analysis is steady in structure and easy to install and operate, is widely applied to the combustion indicator diagram measurement and the torsional vibration test of a 165-series engine, and has high measurement accuracy and good use stability.

The invention discloses an engine timing measurement method and system and a storage medium, and the method comprises the following steps: measuring an engine crankshaft rotation angle through an angle marker, measuring an engine crankshaft position through a crankshaft position sensor, and outputting an engine crankshaft position signal; measuring the pressure in an engine cylinder through a cylinder pressure sensor and outputting a cylinder pressure signal; acquiring a compression top dead center position of a cylinder piston of the engine through the cylinder pressure sensor, and defining the top dead center position as 0 degree; and connecting the crankshaft position signal and the cylinder pressure signal into a lower computer combustion analyzer, displaying the crankshaft position signal and the cylinder pressure signal through an upper computer, and measuring the angle of the tooth missing position to realize measurement of engine timing. Existing resources can be effectively utilized, the measurement precision is improved, the labor intensity is reduced, the test time is shortened, and the working efficiency is improved.

A combustion analyzer sample introduction apparatus and method for supplying a liquid sample into a combustion chamber (130,150) of a combustion analyzer. A supply member (108, preferably, cooled) extends through a combustion chamber opening (132,152) and comprises a downstream member end within the combustion chamber. A supply spray head (92) is received in the member end and comprises a discharge opening (94) to deliver liquid sample and carrier gas into the combustion chamber. A carrier gas supply conduit (106,114,122) supplies carrier gas (preferably, oxygen) to the discharge opening, along a carrier gas flow path. A sample supply conduit (100,102) having a downstream first end passes through the supply member towards the spray head and supplies liquid sample into the carrier gas flow path at a sample supply location within the combustion chamber at / adjacent the discharge opening. Liquid sample is thereby transported by carrier gas out of the discharge opening into the combustion chamber as a spray.

The invention discloses a method for obtaining the best advance angle of ignition of a coke-oven gas engine. A common advance angle of ignition optimization method, MBT, fails to take emission performance into account and leads to emission of nitrogen oxides exceeding the standard seriously when applied to the coke-oven gas engine. According to the method, the coke-oven gas engine improved by a gasoline engine is adopted, and with combination of a dynamometer, an emission analyzer and a combustion analyzer, influence rules on engine power performance and emission characteristics by the advanceangle of ignition under different working conditions are researched, algorithm of advance angle of ignition optimization is adopted based on the influence rules to establish a single objective solution model and calculate the best advance angle of ignition under different working conditions. The obtained best advance angle of ignition can be written in ignition MAP of ECU to be used for actual control of the coke-oven gas engine.

The embodiment of the invention provides a method for virtually calibrating an engine model, which is used for improving the precision of a calibration value of the engine model so as to reduce the workload of calibration work. The method comprises the steps of obtaining test data; acquiring a basic engine model; acquiring a combustion analysis data sample of the engine according to the test data; performing model training on a cylinder model of the basic engine model according to the combustion analysis data sample to obtain a target cylinder model; generating target cylinder calibration data according to the target cylinder model; calibrating a cylinder model of the basic engine model according to the target cylinder calibration data; calibrating the sub-model precision of the basic engine model according to the steady-state test data; operating the calibrated basic engine model to generate operation data; judging whether the precision of the sub-model in the operation data accords with preset precision or not; if yes, calibrating a temperature sensor of the basic engine model according to the transient test data, and forming a target engine.

The invention discloses an engine combustion isometric degree calculation method and device and an engine combustion analyzer, and belongs to the technical field of engines. The method comprises the steps that the total heat release amount Qn of an actual combustion cycle is equally divided into multiple sections of constant-volume heat release at different crankshaft corners, and the heat releasesections are considered to be adiabatic processes; and the actual combustion cycle is divided into multiple sections of Otto cycles, the average heat efficiency of the divided multiple sections of Otto cycles is compared with the theoretical heat efficiency of the combustion cycle of the engine, and the isometric degree of the actual combustion cycle is obtained and output. According to the invention, the isometric degree of the combustion cycle of the engine can be displayed in real time, direct and objective reference data is provided for combustion analysis and diagnosis in actual engineering, and reference data is provided for automatic calibration work of the engine.

The invention discloses an explosive environment-used explosion-proof diesel engine detection platform and an explosion-proof diesel engine development method, which belong to the field of power machinery. The detection platform comprises an in-cylinder measurement and control system for acquiring combustion-related parameters of the cylinder of the diesel engine, a conventional measurement and control system for measuring conventional parameters of the diesel engine and an exhaust emission testing system for acquiring the exhaust gas of the diesel engine, wherein the in-cylinder measurement and control system comprises a sensor for acquiring in-cylinder combustion parameters and a combustion analyzer connected with the sensor; and the conventional measurement and control system comprisesa dynamometer connected with an engine and a measuring and controlling instrument connected with the dynamometer. The development method comprises steps: the combustion-related parameters of the cylinder of the diesel engine are acquired; the conventional parameters of the diesel engine and the exhaust gas of the diesel engine are measured; when exhaust emission does not reach non-road stage-III emission regulations, all acquired parameters are compared with an original engine, the explosion-proof diesel engine is improved according to a comparison result until the exhaust emission reaches thenon-road stage-III emission regulations, and then, the development is ended.