intake manifold connecting plate for egr engine

Abstract

The invention relates to an intake manifold connecting plate used for EGR (Exhaust Gas Recirculation) engine. The intake manifold connecting plate is provided with multiple through air channels sequentially from left to right, an end port at one side of each air channel is communicated with each air inlet of a cylinder lid in a one-to-one correspondence manner respectively, and the end port at the other side of each air channel is communicated with each air inlet channel of a plastic intake manifold in a one-to-one correspondence manner respectively; multiple EGR air grooves correspondingly matching with each air channel are formed in one side of the intake manifold connecting plate, and the side points to the cylinder lid; one end of each EGR air groove is communicated with the corresponding air channel while the other end of each EGR air groove is communicated with a lengthways EGR hole of the cylinder lid; an EGR communicative air groove for communicating the lengthways EGR hole of the cylinder lid with transverse EGR holes of the cylinder lid is also formed in the intake manifold connecting plate. The n intake manifold connecting plate used for the EGR engine is capable of isolating temperature which is transmitted from exhaust gas to the plastic intake manifolds efficiently, preventing deformation or accelerated ageing of the plastic intake manifolds due to high temperature, and guaranteeing reliability and service life of the plastic intake manifolds of the engine with the adoption of the EGR technology.

Description

technical field [0001] The invention relates to an automobile engine exhaust gas recirculation technology, in particular to an intake manifold connecting plate used in the EGR technology. Background technique [0002] With the development of automobile technology, plastic intake manifolds have been widely used in gasoline engines due to their advantages of light weight, low cost, smooth inner wall, small air flow resistance, and free structural design, presenting an opportunity to replace aluminum alloy intake manifolds. trend. [0003] At the same time, with the continuous enhancement of people's awareness of environmental protection and the increasingly stringent requirements of automobile emission regulations, Exhaust Gas Recirculation (EGR), as one of the key technologies for energy saving and emission reduction, has been widely used. [0004] EGR technology is used to reduce the emission of nitrogen oxides in automobile exhaust gas. Nitrogen and oxygen will only react ...

AI Technical Summary

Problems solved by technology

[0005] However, how to apply the plastic intake manifold and EGR technology to the same gasoline engine has become a research and development problem

Since the main material used in the production of plastic intake manifolds is PA6-30GF or PA66-30GF, the long-term use temperature of these two materials should not exceed 130°C. If the use temperature is higher than 130°C for a long time, the plastic intake manifold There will be deformation and aging problems, which will affect the normal operation and reliability of the engine

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