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 control unit The engine speed signal and the throttle position signal are connected, and the input end of the second electronic control unit is connected to the engine speed signal and the throttle position signal. In this way, the data collected by the two electronic control units is limited and cannot truly reflect the engine Working conditions; resulting in the control of the two high-frequency solenoid valves by the output terminals of the two electronic control units, and thus the inability to accurately reduce NOx emissions

In addition, in the exhaust gas purification control device in the prior art, the working parameters of the electronic control unit are set for one vehicle type, that is, a set of exhaust gas purification control device can only be applied to one type of vehicle type, which greatly limits the emission of exhaust gas. Promotion and Popularization of Purification Control Devices

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