Simple system for testing emission of motor vehicle through transient working condition method

Abstract

The invention provides a simple emission testing system of a motor vehicle based on a transient working condition method, which simplifies the functions of the equipment on the basis of retaining the large-scale emission detection equipment, and ensures the reliability and traceability of the data source. It includes the field, which is equipped with a test area and a control area. The control area can observe the test area. The test area is equipped with a test frame, a chassis dynamometer, a fan, and a surveillance camera. The front of the test frame is set There is a chassis dynamometer, the fan is located in the front of the chassis dynamometer, the blower outlet of the fan is arranged towards the front of the vehicle to be tested, and the monitoring camera is used to record the real-time images of the vehicle to be tested; the control area is equipped with an emission analyzer, The detection mechanism uses a main control computer, and a constant-volume sampling unit and a connecting pipe are arranged between the test area and the control area. The exhaust gas of the vehicle to be tested is connected to the inlet of the constant-volume sampling unit through the input connecting pipe.

Description

technical field [0001] The invention relates to the technical field of automobile exhaust testing, in particular to a simple emission testing system of a motor vehicle transient working condition method. Background technique [0002] The existing vehicle emission detection system mainly includes four core equipments: chassis dynamometer, environmental simulation cabin, emission test equipment, and main control equipment. , standard gas pipeline, compressed air and other supporting facilities. It is also necessary to build a dipping workshop, anti-static floor, and smoke exhaust pipes outside the laboratory. [0003] At present, most domestic vehicle emission equipment, chassis dynamometers, and main control computers use English operating systems, and not only for Chinese laws and regulations, but also for the laws and regulations of different countries and regions such as Europe, the United States, and Japan. Not only for emission tests, but also environmental simulation ...

AI Technical Summary

Problems solved by technology

[0010] 1. The emission detection accuracy of the five-gas analyzer is low

The measured value is the concentration value, which has no corresponding relationship with the g / km unit certified by regulations

[0011] 2. Two steady speed conditions of 25km / h and 40km / h were used in the measurement, which cannot truly reflect the driving conditions of the vehicle in the urban area

It cannot truly reflect the situation of the vehicle driving on the road.

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