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Protection system and protection method for cold end egr valve of exhaust gas recirculation system of vehicle-mounted diesel engine

A recirculation system, EGR valve technology, used in exhaust gas recirculation, charging system, electrical control, etc.

Inactive Publication Date: 2020-02-25
LIANCHUANG AUTOMOBILE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention also provides a method for protecting the cold-end EGR valve of the vehicle-mounted diesel engine exhaust gas recirculation system

Method used

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  • Protection system and protection method for cold end egr valve of exhaust gas recirculation system of vehicle-mounted diesel engine
  • Protection system and protection method for cold end egr valve of exhaust gas recirculation system of vehicle-mounted diesel engine
  • Protection system and protection method for cold end egr valve of exhaust gas recirculation system of vehicle-mounted diesel engine

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Embodiment Construction

[0029] Vehicle-mounted diesel engine exhaust gas recirculation system provided by the invention (refer to figure 1 The structure shown) cold end EGR valve protection system; a typical EGR valve body includes the following parts: EGR valve position sensor, installed on the output shaft of the transmission mechanism, can detect the position of the lifting body, and the electric control system can also Closed-loop control of the EGR valve; eccentric motion wheel, which converts the rotational motion of the gear transmission mechanism into the linear motion of the valve body EGR valve body gear transmission mechanism; the EGR valve drives the motor; the ECU control of the EGR valve in the exhaust gas recirculation system adopts the following methods :

[0030] Obtain the temperature when the engine starts, when the engine starting temperature meets the first preset temperature range, it is allowed to open the EGR valve, otherwise it is not allowed to open the EGR valve; calculate ...

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Abstract

The invention discloses a protection system for a cold end EGR valve of a vehicle-mounted diesel engine exhaust gas recirculation system. An ECU of the exhaust gas recirculation system controls the EGR valve in the following manners that the starting temperature of an engine is obtained, if the starting temperature of the engine meets the first preset temperature interval, the EGR valve is allowed to be started, and if the starting temperature of the engine does not meet the first preset temperature interval, the EGR valve is not allowed to be started; the work temperature of an EGR valve body is calculated, if the work temperature of the EGR valve body meets the second preset temperature interval, the EGR valve is allowed to be started, and if the work temperature of the EGR valve body does not meet the second preset temperature interval, the EGR valve is not allowed to be started. According to the protection system and method for the cold end EGR valve of the vehicle-mounted diesel engine exhaust gas recirculation system, for the cold end EGR valve body, the intake air temperature of the EGR valve body is recognized according to the engine running work condition in the ECU control strategy, the fault situation of EGR valve body carbon deposition and damage can be avoided, and the EGR valve body is protected.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a protection system for a cold-end EGR valve of a vehicle-mounted diesel engine exhaust gas recirculation system, and also relates to a protection direction for a cold-end EGR valve of a vehicle-mounted diesel engine exhaust gas recirculation system. Background technique [0002] Diesel engine is considered to be the model with the highest thermal efficiency, the best energy utilization rate and the most energy-saving model among all kinds of power machinery currently used in industrialization, especially in terms of vehicle power. Diesel engine combustion has the characteristics of high speed, high temperature and high pressure. Under the condition of the same power, the torque of diesel engine is large, and the speed of maximum power is low, which is suitable for the use of trucks. At the same time, however, harmful emissions from diesel engines have also had a serious impact on soci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/05F02M26/23F02M26/49F02D41/00
CPCF02D41/0065F02D2041/0067F02D2200/021F02D2200/04F02D2200/0414
Inventor 赵阳
Owner LIANCHUANG AUTOMOBILE ELECTRONICS