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A protection system, method and vehicle for egr gas check valve

A gas check valve and protection system technology, applied in the direction of charging system, electrical control, exhaust gas recirculation, etc., can solve the problem of large opening of EGR valve, accelerated damage of check valve, cold and heat shock of change range of check valve, etc. problem, to achieve the effect of improving SCR efficiency, alleviating high temperature impact, and ensuring emission

Active Publication Date: 2022-04-01
CHINA NAT HEAVY DUTY TRUCK GRP HANGZHOU ENGINE
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Since the opening of the EGR valve is not restricted by the closed-loop calculation, the opening of the EGR valve may be too large, resulting in the temperature of the gas after EGR cooling is too high. Closing the EGR valve repeatedly so easily causes the one-way valve to withstand very large changes in cold and heat shocks
Thereby accelerating the damage of the one-way valve

Method used

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  • A protection system, method and vehicle for egr gas check valve
  • A protection system, method and vehicle for egr gas check valve

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Embodiment Construction

[0046] The invention provides a protection system for an EGR gas check valve, such as figure 1As shown, it includes: ECU module 1, EGR cooler 2, engine 3, exhaust pipe 4, EGR control valve 5, check valve 6 and temperature sensor 7;

[0047] The engine 3, the exhaust pipe 4, the EGR control valve 5, the EGR cooler 2, and the one-way valve 6 are connected in sequence; the temperature sensor 7 is set near the output end of the one-way valve 6; the temperature sensor 7 and the EGR control valve 5 are respectively connected to the ECU module 1 is electrically connected; the temperature sensor 7 is used to sense the temperature of the EGR exhaust gas discharged from the output end of the one-way valve 6; the ECU module 1 is used to obtain the temperature value of the EGR exhaust gas sensed by the temperature sensor 7, and compare the sensed EGR exhaust gas temperature value with the preset threshold value For comparison, when the EGR exhaust gas temperature exceeds the threshold val...

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Abstract

The invention provides a protection system, method and vehicle for an EGR gas check valve, comprising: an ECU module, an EGR cooler, an engine, an exhaust pipe, an EGR control valve, a check valve and a temperature sensor; an engine, an exhaust pipe, The EGR control valve, the EGR cooler, and the check valve are connected in sequence; the temperature sensor is set close to the output end of the check valve; the temperature sensor and the EGR control valve are respectively electrically connected to the ECU module; the temperature sensor is used to sense the discharge from the output end of the check valve. EGR exhaust gas temperature: the present invention can effectively alleviate the instantaneous high-temperature impact, and prevent the EGR check valve from being damaged by high-temperature gas.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to a protection system and method for an EGR gas check valve. Background technique [0002] Compared with the National V technology, the National VI standard has more stringent restrictions on diesel engine emissions, and the use of exhaust gas recirculation (EGR) technology is the current way to reduce the NOx of diesel engines. X One of the main measures of emissions. The EGR check valve is one of the key components in the EGR technology of the vehicle diesel engine to ensure the low-speed EGR rate. Whether the EGR check valve works normally directly affects the economy of the diesel engine, and even affects the emission of the whole vehicle. [0003] The EGR check valve is installed downstream of the EGR cooler, which can prevent the backflow of fresh air in the engine intake pipe. The plastic structural products on the check valve have a temperature resistance limit (be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/47F02M26/65F02D41/00
CPCF02D41/0065F02D41/0077F02M26/47F02M26/65F02D2041/0067
Inventor 郑智展卢永信宋洪伟黄臻郭焱
Owner CHINA NAT HEAVY DUTY TRUCK GRP HANGZHOU ENGINE