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Low-pressure exhaust gas recirculation (EGR) system of vehicle engine

An engine and low-pressure technology, which is applied in the field of EGR system, can solve the problems of affecting EGR exhaust gas flow, slow EGR response speed, long EGR system path, etc., and achieve the effect of shortening response speed, lowering temperature and shortening response time

Inactive Publication Date: 2017-06-13
ZHEJIANG GEELY HLDG GRP CO LTD +1
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Problems solved by technology

However, in the development process of the low-pressure EGR system, slow response speed is an important problem affecting the application of low-pressure EGR technology
[0004] In the existing technical solution, due to the long path of the low-pressure EGR system of the turbocharged gasoline engine, the change of the exhaust back pressure affects the EGR exhaust gas flow, resulting in a slow EGR response speed

Method used

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  • Low-pressure exhaust gas recirculation (EGR) system of vehicle engine

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Embodiment Construction

[0028] figure 1 It is a structural schematic diagram of a low-pressure EGR system of a vehicle engine according to an embodiment of the present invention.

[0029] In particular, see figure 1 , the present invention provides a low-pressure EGR system for a vehicle engine, the system passes through an engine 5, wherein the engine 5 has an intake port and an exhaust port. The system may include an intake pipeline 2 , an exhaust pipeline 3 , an EGR pipeline 4 and an electronic supercharger 1 . Wherein, the air intake pipeline 2 is arranged before the air intake port, and is used for gas inflow of the engine 5 . The exhaust pipeline 3 is arranged behind the exhaust port, and is used for exhaust gas of the engine 5 to be discharged. The EGR pipeline 4 is connected between the intake pipeline 2 and the exhaust pipeline 3, and is used to send part of the exhaust gas discharged from the exhaust pipeline 3 into the intake pipeline after exhaust gas recirculation 2, so that part of ...

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Abstract

The invention provides a low-pressure exhaust gas recirculation (EGR) system of a vehicle engine and relates to an EGR system. The low-pressure EGR system of the vehicle engine passes through the engine, wherein a gas inlet and a gas outlet are formed in the engine, and the system comprises a gas inlet pipeline, a gas outlet pipeline, an EGR pipeline and an electronic supercharger. The gas inlet pipeline is arranged in front of the gas inlet and used for gas inflowing of the engine. The gas outlet pipeline is arranged behind the gas outlet and used for exhaust gas discharging of the engine. The EGR pipeline is connected between the gas inlet pipeline and the gas outlet pipeline. The electronic supercharger is arranged on one side of the gas inlet pipeline through a pipeline. According to the low-pressure EGR system of the vehicle engine, the electronic supercharger is additionally arranged on a gas inlet system, and response characteristics of the engine are improved under the working conditions such as cold starting, rapid accelerating, a low rotating speed and a low load accordingly. After the electronic supercharger is applied to the engine, natural aspirated working conditions, such as cold starting, the low rotating speed and the low load, of the engine are made up, the gas inlet speed of the engine is increased, and the response speed is reduced.

Description

technical field [0001] The invention relates to an EGR system, in particular to a low-pressure EGR system of a vehicle engine. Background technique [0002] EGR (English full name: Exhaust Gas Recirculation, Chinese translation: Exhaust Gas Recirculation) technology plays an important role in engine fuel saving and emission reduction. With the increasingly stringent fuel consumption and emission regulations, the application of EGR technology in supercharged gasoline engines has gradually become a trend. The application of EGR technology on supercharged gasoline engines will inevitably become a mainstream in engine technology upgrades of major OEMs. [0003] EGR technology applied to supercharged gasoline engines is mainly divided into two technical routes: high-pressure EGR and low-pressure EGR. Gasoline engine high-pressure EGR technology is relatively mature, but its contribution to the fuel consumption of the engine and the vehicle is relatively small. In the developme...

Claims

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Application Information

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IPC IPC(8): F02M26/06
Inventor 旷云龙杨林蒋恩杰张书恩李连豹韦虹李双清王瑞平
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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