Engine transient state discharge test analysis system and method

Abstract

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.

Description

technical field [0001] The invention belongs to the field of automobile testing, and in particular relates to an engine transient emission testing and analysis system and method. Background technique [0002] With the release of "Limits and Measurement Methods of Pollutant Emissions from Light-duty Vehicles (Phase 6 in China)", major car companies are facing huge challenges in the development of vehicle emission performance. Compared with the National V emission regulations, the National VI emission regulations have adjusted the test cycle from the NEDC test cycle to the WLTC test cycle, thus significantly improving the performance requirements of the vehicle under transient conditions. Therefore, enterprises will also focus more on improving the transient performance of engines and powertrains during vehicle product development. [0003] When carrying out the vehicle emission test according to regulations, due to the low sampling frequency of the emission analyzer and the ...

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Problems solved by technology

[0003] When carrying out the vehicle emission test according to regulations, due to the low sampling frequency of the emission analyzer and the high frequency of engine combustion analysis, it is usually impossible to directly conduct correlation analysis, so that it is impossible to accurately analyze the cause of emission deterioration under the vehicle operating condition. This leads to an increase in the number of tests in the process of vehicle emission development and optimization, which not only increases the development cost of the enterprise, but also prolongs the product development cycle

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