Control device for vehicle tail gas purification

Abstract

The invention discloses a control device for vehicle tail gas purification. The control device comprises a central electronic control unit (ECU) (1), a rotating speed sensor (3), a vehicle speed sensor (4), a water temperature sensor (6), a pressure / flow sensor (14) and an engine exhaust gas recirculation (EGR) electric control system, wherein the rotating speed sensor (3) is used for measuring the rotating speed of a crankshaft on an engine (2), the vehicle speed sensor (4) is used for measuring the rotating speed of automobile tires, the water temperature sensor (6) is used for measuring the temperature of a water tank (5) on the engine (2), and the pressure / flow sensor (14) is used for measuring the pressure / flow on the engine (2). The invention provides the control device for the vehicle tail gas purification. The control device for the vehicle tail gas purification has the advantages that the emission of NOx, HC and CO in the tail gas can be more effectively reduced, and the application range of the control device for the vehicle tail gas purification can be further expanded.

Description

technical field [0001] The invention belongs to the technical field of automobile tail gas emission purification and relates to a control device for vehicle tail gas purification. 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 throu...

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, specifically referring to: the first electronic control unit The input end is connected to the engine speed signal and the throttle position signal, 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 The working conditions of the engine; resulting in the control of the two high-frequency solenoid valves at the output of the two electronic control units, and thus cannot effectively reduce NOx emissions; in addition, for most of the current engine exhaust gas recirculation systems, often only Can reduce the NOx emission in the tail gas, but can not really reduce the discharge of HC and CO in the tail gas; Also, in the exhaust gas purification control device in the prior art, the working parameters of the electronic control unit are all set for a vehicle type, That is, a set of exhaust gas purification control device can only be applied to one vehicle type, which greatly limits the promotion and popularization of exhaust gas purification control device

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