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Simulation prediction method for PEMS emission of whole vehicle based on universal characteristics of engine

A technology of universal characteristics and simulation prediction, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of unguaranteed prediction accuracy, huge workload and experimental benchmarking workload, etc.

Pending Publication Date: 2019-11-05
FAW JIEFANG AUTOMOTIVE CO
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AI Technical Summary

Problems solved by technology

The current method requires the physical model to have high precision, and some of the parameters depend on the test results at the same time, and the workload of the modeling process and experimental benchmarking of each model is relatively large, and the final prediction accuracy cannot be guaranteed

Method used

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  • Simulation prediction method for PEMS emission of whole vehicle based on universal characteristics of engine
  • Simulation prediction method for PEMS emission of whole vehicle based on universal characteristics of engine

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Embodiment Construction

[0019] The present invention proposes a relatively fast and accurate method for predicting PEMS vehicle emissions. The method interpolates the original emission results of the universal characteristics of the engine bench and adds the data processing of the transfer function, and simulates and predicts the PEMS emissions of the vehicle, which can improve Simulation predicts the speed, reduces the cost of PEMS vehicle experiments and improves the accuracy of emission prediction.

[0020] Such as figure 1 Shown, the simulation prediction method of the vehicle PEMS discharge based on engine universal characteristic of the present invention comprises the following steps:

[0021] Step 1: According to the technical parameter table provided by the OEM, obtain the vehicle parameters, engine universal characteristic map, and post-processor parameters, and build the target model CRUISE vehicle model, post-processor BOOST chemical reaction model, urea injection control model, Engine be...

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Abstract

The invention relates to a simulation prediction method for PEMS emission of a whole vehicle based on universal characteristics of an engine. The method comprise: carrying out coupling control on a CRUISE whole vehicle model, a postprocessor BOOST chemical reaction model, a urea injection control model, an engine pedestal and a whole vehicle postprocessor temperature difference model; constructinga PEMS road spectrum; exporting rotating speed torque information and actual environment information of the engine; performing interpolation processing to obtain original exhaust gas components, exhaust gas flow and exhaust gas temperature initial values of the PEMS road spectrum engine; carrying out transfer function processing to obtain optimized values of original exhaust gas components and exhaust gas flow of the engine; correcting the processor temperature; and calculating exhaust gas components and exhaust gas flow data at the outlet of the SCR catalyst, and the ammonia storage capacityand the urea injection capacity of the SCR catalyst. According to the method, the engine emission development test cost can be reduced, the project development period can be shortened, and the simulation prediction speed and precision are improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle emission pollutant testing, and relates to a simulation prediction method for off-line prediction of actual road vehicle PEMS emission based on the emission results of universal characteristics of the engine. Background technique [0002] With the deterioration of my country's atmospheric environment and the increasingly stringent emission regulations, heavy-duty vehicles need to pass the portable emission measurement system (PEMS) for emission detection based on actual road driving, which is different from the engine bench test. , The actual road emission test process takes into account the factors that affect the actual driving emission results, including driving conditions, traffic conditions, driving style, ambient temperature, humidity, and altitude, and can more truly reflect the emission level of the vehicle during actual use. [0003] The vehicle PEMS emission test usually selects the targe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 任学成陆晓燕芮庆西陈灿玉郭际家吴峰胜陈勤学
Owner FAW JIEFANG AUTOMOTIVE CO
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