Intake and exhaust system of internal combustion engine

Abstract

The invention provides an intake and exhaust system of an internal combustion engine, and belongs to technical field of internal combustion engines. The intake and exhaust system of the internal combustion engine comprises an intake main pipe, an exhaust main pipe, an exhaust branch pipe, an intake mixed flow cavity and an intake branch pipe, wherein a low-speed intake manifold, two medium-speed intake manifolds and four high-speed intake manifolds are connected between the pipe wall of the intake main pipe and the intake mixed flow cavity, the low-speed intake manifold is close to the inlet end of the intake main pipe, the high-speed intake manifolds are close to the intake mixed flow cavity, a pneumatic piston is connected to the interior of the intake main pipe in a sliding mode, the pneumatic piston is connected with a hollow exhaust gas middle pipe, a locking ring I and a locking ring II which is located between the locking ring I and the pneumatic piston are arranged on the pipewall of the exhaust gas middle pipe, a reset spring I which is used for driving the pneumatic piston to move to the low-speed intake manifold is connected between the pipe wall of the intake main pipeand the pneumatic piston, and the exhaust branch pipe communicates with the exhaust main pipe by virtue of the exhaust gas middle pipe. The intake and exhaust system has the advantage that the intakepath can be adjusted.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and relates to an intake and exhaust system of an internal combustion engine. Background technique [0002] For internal combustion engines, such as gasoline engines used in conventional automobiles, the setting of the intake and exhaust systems is extremely critical, which directly affects the core parameters of the internal combustion engine such as the combustion efficiency, fuel-saving performance, and exhaust indicators of the automobile. [0003] Existing automobile engines, through the variable intake manifold, realize the adjustment of the intake path and intake volume under low-speed and high-speed conditions; by detecting parameters such as exhaust gas and vehicle speed, part of the exhaust gas is recovered and reenters the combustion chamber for combustion Although the above-mentioned function of adjusting the intake and exhaust can greatly improve the performance o...

AI Technical Summary

Problems solved by technology

[0003] Existing automobile engines, through the variable intake manifold, realize the adjustment of the intake path and intake volume under low-speed and high-speed conditions; by detecting parameters such as exhaust gas and vehicle speed, part of the exhaust gas is recovered and reenters the combustion chamber for combustion ;Although the above-mentioned function of adjusting the intake and exhaust can greatly improve the performance of the engine, its detection and judgment are based on various driving data, and it also particularly depends on sensing elements and electronic programs

Due to the instability of electronic components, coupled with the extremely harsh environment of the electronic components used for intake and exhaust, it is one of the important reasons for the high failure rate, poor stability and short maintenance cycle of automobiles. Therefore, the present invention aims to provide an intake and exhaust system with a simple structure that can be realized almost by a mechanical structure, which also has the functions of exhaust gas reuse, exhaust gas preheating, intake path adjustment, etc.

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