Connecting structure of plastic intake manifold and EGR (exhaust gas recirculation) pipe

A technology for connecting intake manifolds and pipes, applied in the field of automotive gasoline engine intake systems, can solve problems such as failure of plastic intake manifolds, and achieve the effects of ensuring sealing, low cost, and wide application range

Inactive Publication Date: 2011-08-10
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem that EGR technology is used in plastic intake manifold engines or plastic intake manifolds are used in engines with EGR technology. Due to the high exhaust gas introduced from the EGR valve into the plastic intake man...

Method used

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  • Connecting structure of plastic intake manifold and EGR (exhaust gas recirculation) pipe
  • Connecting structure of plastic intake manifold and EGR (exhaust gas recirculation) pipe
  • Connecting structure of plastic intake manifold and EGR (exhaust gas recirculation) pipe

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and example the present invention will be further described:

[0017] Such as figure 1 As shown, the connection structure between the plastic intake manifold and the EGR pipe includes a plastic intake manifold 4, an EGR pipe 2, a connecting flange 1, a rubber sealing ring 3, etc., and their assembly sequence is: firstly, the rubber sealing ring 3 Assemble it into the EGR interface sealing groove 42 on the plastic intake manifold 4, then insert the EGR pipe 2 into the EGR exhaust gas inlet interface 43 on the plastic intake manifold 4, and finally connect the connecting flange 1 and the The plastic intake manifold 4 is fixed.

[0018] The specific working principle is as follows: figure 2 Shown:

[0019] 1. Realization of the cooling function: cooling the high-temperature exhaust gas entering the plastic intake manifold 4 is realized by reasonably arranging the position of the EGR exhaust gas inlet port 43 .

[0020] In...

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PUM

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Abstract

The invention discloses a connecting structure of a plastic intake manifold and an EGR (exhaust gas recirculation) pipe. The connecting structure comprises the plastic intake manifold and the EGR pipe, wherein the EGR pipe is connected to the EGR waste gas inlet interface of the plastic intake manifold by virtue of a bolt through a flange connecting disc; the EGR waste gas inlet interface is arranged right behind the cold air inlet channel of the plastic intake manifold; the EGR waste gas inlet interface is provided with a seal ring; a heat isolating sleeve is welded at the connecting end of the EGR pipe and is horn-shaped; a small end port and the connecting end are welded; a large end port is arranged at the EGR waste gas inlet interface of the plastic intake manifold through a flanging, and is pressed by a connecting flange disc. According to the invention, the temperature of the waste gas after entering the intake manifold can be reduced effectively, the heat which is conducted to the plastic intake manifold from the waste gas can be isolated effectively, and the tightness of the intake manifold is ensured.

Description

technical field [0001] The invention relates to an automobile gasoline engine intake system, in particular to an EGR waste gas cooling, heat insulation and sealing structure for a plastic intake manifold of the intake system. Background technique [0002] With the development of automobile technology, the plastic intake manifold has been widely used in various high and low grade gasoline engines due to its light weight, smooth air passage, high intake efficiency, flexible structural design, and low cost, gradually replacing aluminum Alloy intake manifold trend. [0003] With the strengthening of people's awareness of environmental protection and stricter emission regulations, how to purify exhaust gas is a difficult problem in current engine design and manufacture. Exhaust gas recirculation technology (EGR) is a relatively mature exhaust gas purification technology and has been widely used. In recent years, studies have found that EGR technology can not only purify the exh...

Claims

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Application Information

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IPC IPC(8): F02M25/07F02M35/104F02M26/12F02M26/17
CPCY02T10/121Y02T10/12
Inventor 薛亚飞张洋王万云何佳佳刘庆
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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