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

An engine and vehicle technology, applied in the field of EGR system, can solve the problems of large diameter of EGR mixed gas circulation pipeline, increase the difficulty and cost of layout, increase the failure of EGR valve, etc. The effect of fewer parts

Inactive Publication Date: 2017-05-24
ZHEJIANG GEELY HLDG GRP CO LTD +1
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Problems solved by technology

[0003] In the current application of high-pressure EGR technology using electronic superchargers for supercharged gasoline engines, compared with conventional high-pressure EGR systems, multiple check valves, sensors, and intercoolers need to be added, which results in high application costs and increased difficulty in layout; There are many actuators to be controlled, and the calibration is difficult; the EGR valve is arranged behind the EGR cooler, which increases the risk of EGR valve failure due to coking and carbon deposits; the diameter of the EGR mixed gas pipeline is large, which increases the difficulty and cost of layout

Method used

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

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Embodiment Construction

[0026] figure 1 It is a structural schematic diagram of a high-pressure EGR system of a supercharged gasoline engine according to an embodiment of the present invention.

[0027] In particular, see figure 1 , the present invention provides a high-pressure EGR system 100 for a vehicle engine, passing through an engine 10, wherein the engine 10 has an intake port and an exhaust port. The high-pressure EGR system 100 of the vehicle engine may include an intake pipeline 20 , an exhaust pipeline 30 , an EGR pipeline 40 and an electronic supercharger 50 . Wherein, the air intake pipeline 20 is arranged before the air intake port for gas inflow of the engine 10 . The exhaust pipeline 30 is arranged behind the exhaust port, and is used for exhaust gas of the engine 10 to be discharged. The EGR pipeline 40 is connected between the intake port of the engine 10 and the exhaust pipeline 30, and is used to recirculate part of the exhaust gas discharged from the exhaust pipeline 30 and t...

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Abstract

The invention discloses a high-pressure exhaust gas recirculation (EGR) system of a vehicle engine and relates to an EGR system. The high-pressure EGR system of the vehicle engine passes through the engine, wherein the engine is provided with a gas inlet and a gas outlet and comprises a gas inlet pipeline, a gas outlet pipeline, an EGR pipeline and an electronic pressurizer. The gas inlet pipeline is arranged in front of the gas inlet. The gas outlet pipeline is arranged behind the gas outlet. The ERG pipeline is connected between the gas inlet and the gas outlet pipeline of the engine and used for conducting ERG on part of gas exhausted by the gas outlet pipeline and then sending the exhaust gas to the engine again. The electronic pressurizer is arranged on one side of the gas inlet pipeline through a pipe. The electronic pressurizer is arranged on the gas inlet pipeline of the high-pressure EGR system, so that parts are fewer, the application cost is low, and the arrangement difficulty is relatively low; and actuators needing to be controlled are fewer, so that calibration is easy to conduct, the oil-saving effect of the electric pressurizer and the high-pressure EGR technology which are applied to a pressurizing gasoline engine is improved, and application of the electric pressurizer and the high-pressure EGR technology to the pressurizing gasoline engine is promoted.

Description

technical field [0001] The invention relates to an EGR system, in particular to a high-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. EGR technology applied to supercharged gasoline engines is mainly divided into two technical routes: high-pressure EGR and low-pressure EGR. The technology of high-pressure EGR for gasoline engines is relatively mature. [0003] In the current application of high-pressure EGR technology using electronic superchargers for superc...

Claims

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Application Information

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IPC IPC(8): F02B37/04F02M26/08F02M26/20F02M26/16F02M26/23F02M26/50
CPCF02B37/04Y02T10/12
Inventor 周华程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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