Vehicle tail gas simulation generation device

Abstract

The invention discloses a vehicle tail gas simulation generation device. The vehicle tail gas simulation generation device comprises a combustion chamber, wherein a high-temperature gas generation mechanism is arranged on one side of the combustion chamber, an adjusting mechanism is arranged on the other side of the combustion chamber, and a tail gas purification unit is arranged on one side of the adjusting mechanism. According to the vehicle tail gas simulation generation device, after high-temperature gas is generated through combustion in a pipeline, a liquid booster pump is started to pressurize liquid (ammonia water or a urea solution), and therefore the liquid is kept at a certain pressure; the liquid spraying amount is controlled through a nozzle, vaporific liquid sprayed out of the nozzle and the high-temperature gas flowing in the pipeline are mixed in a first mixing chamber, and the mixed gas passes through an oxidation type catalytic conversion agent to generate nitric oxide which reaches the interior of a second mixing chamber; the amount of hydrocarbon gas entering the second mixing chamber is controlled through a first mass flow controller, and meanwhile the amount of carbon monoxide gas entering the second mixing chamber is controlled through a second mass flow controller; and by analogy, gases of other components can be added.

Description

technical field [0001] The invention relates to a vehicle exhaust post-treatment testing technology in the technical field of internal combustion engines, in particular to a vehicle exhaust simulation generating device. Background technique [0002] At present, with the increase of car ownership, more and more attention has been paid to the environmental pollution caused by automobile exhaust. The increasingly stringent regulations on automobile exhaust emission require that automobiles be equipped with more efficient and durable exhaust after-treatment devices. Motor vehicle exhaust pollution plays an important role. The performance evaluation of catalytic converters includes laboratory samples, bench evaluation and vehicle evaluation methods, among which bench evaluation is the most important part of the entire evaluation system. At present, the exhaust gas source used in the domestic bench evaluation system is basically the real exhaust of the engine, which has disadvanta...

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Problems solved by technology

In addition, once the engine control logic is changed, or the supplier needs the engine to provide a new test process, it is necessary to wait for the engine manufacturer to re-calibrate, which will undoubtedly increase the product development cycle; (3) high cost

When carrying out the aging test of the catalytic converter, according to the regulations, the catalytic converter has to undergo a long-term bench aging test on the engine bench, or carry out a road aging test of hundreds of thousands of kilometers on the whole vehicle, which consumes a lot of manpower , material and financial resources

[0003] Patent No. is CN107806636A "Diesel Engine Exhaust Simulator Generator", and the publication No. is Chinese Invention Patent by injecting nitrogen-containing fuel into the combustion chamber to generate nitrogen oxides. And through the control of the bypass pipe to obtain the exhaust gas at a specific temperature and flow rate, the nitrogen-containing fuel is unclear and the concentration and temperature of nitrogen oxides cannot be precisely controlled

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