Vehicle tail gas purifying device

Abstract

The invention discloses a vehicle tail gas purifying device. The device comprises a central electronic control unit ECU (1), a rotating speed sensor (3), a vehicle speed sensor (4), a water temperature sensor (6), and an engine waste gas recirculation EGR electric control system; the rotating speed sensor (3) is connected with an input end of the ECU (1) through a signal; the vehicle speed sensor (4) and the input end of the ECU (1) are connected through a signal; the water temperature sensor (6) and the input end of the ECU (1) are connected through a signal; the engine waste gas recirculation EGR electric control system comprises a bypass pipeline (9); a high-frequency electromagnetic valve (10) is arranged in the bypass pipe (9); and a control end of the high-frequency electromagnetic valve (10) is connected with an output end of the ECU (1) through a signal. The vehicle tail gas purifying device can reduce the NOx emission more effectively, and further widens the application range.

Description

technical field [0001] The invention belongs to the technical field of automobile tail gas emission purification, and relates to a vehicle tail gas purification device. Background technique [0002] At present, the problem of vehicle exhaust emissions is already one of the sources of air pollution, and developed countries such as Europe and the United States have become more and more strict on exhaust emission indicators. In the past, vehicles generally installed a three-way catalytic converter on the vehicle exhaust pipe to reduce the emission of harmful gases from the vehicle, but the three-way catalytic converter has the disadvantages of easy aging and low conversion efficiency. In the prior art, there are exhaust gas recirculation methods to reduce harmful gas emissions, for example: the invention patent published by the State Intellectual Property Office: a vehicle exhaust gas purification composite electronic control device, 2011100531134, specifically through the air ...

AI Technical Summary

Problems solved by technology

In the past, vehicles generally installed a three-way catalytic converter on the vehicle exhaust pipe to reduce the emission of harmful gases from the vehicle, but the three-way catalytic converter has the disadvantages of easy aging and low conversion efficiency

In the prior art, there are exhaust gas recirculation methods to reduce harmful gas emissions, for example: the invention patent published by the State Intellectual Property Office: a vehicle exhaust gas purification composite electronic control device, 2011100531134, specifically through the air injection electronic control subsystem and the engine exhaust gas recirculation EGR electronic control subsystem to reduce NOx emissions, but the input terminals of the two electronic control units in this technical solution are only the engine speed signal and the throttle position signal, that is, the input terminal of the first electronic contro

Images