Vehicle-mounted emission testing device and testing method thereof

Abstract

The invention discloses a vehicle-mounted emission testing device and a testing method thereof. The vehicle-mounted emission testing device comprises an exhaust mass measurement unit, a pollutant sampling and analyzing unit, a master control unit, a fuel consumption measurement unit and a road load simulation loading device which are arranged on a tested sample vehicle. The exhaust mass measurement unit, the pollutant sampling and analyzing unit, the fuel consumption measurement unit and the road load simulation loading device are all connected with the master control unit. Compared with existing devices and methods in the industry, the vehicle-mounted emission testing device and the testing method can rapidly and efficiently perform vehicle emission testing without depending on relevant information of an electronic control unit of the tested vehicle, and accordingly obtain the emission performance condition of the tested vehicle.

Description

technical field [0001] The invention relates to a vehicle-mounted emission test device and a test method thereof, belonging to the field of road vehicle emission tests. Background technique [0002] As far as the applicant knows, along with the rapid development of the automobile industry, automobiles have become an indispensable means of transportation in people's daily life. But at the same time, the number of automobiles keeps increasing, and automobile exhaust emissions have become an important source of air pollution. To further control motor vehicle exhaust pollution and improve air quality has become a focus of the global automobile industry and environmental protection agencies. [0003] In recent years, in order to effectively monitor the actual emission status of vehicles in use and make up for the defects that some road driving conditions cannot be fully reflected in bench tests, some targeted testing methods and regulations have been successively issued around t...

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Problems solved by technology

[0005] After retrieval, Chinese patent CN104849068A discloses a fast on-board emission test system and method for heavy-duty vehicles. This method performs multiple tests to calculate the specific emission of the prototype vehicle and obtain the specific emission coefficient. The unit is still g / kwh, which cannot be true. Efficient response to vehicle emission levels

Patent CN102162772A discloses a vehicle emission detection device and method. The method also reads the instantaneous fuel consumption of the vehicle through the on-board diagnostic system and calculates the carbon dioxide emission. This method has the uncertainty of OBD reading data, which affects the actual emission. As a result, it does not accurately reflect the vehicle's emission figures

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