Intake and exhaust system of internal-combustion engine

Abstract

The invention discloses an intake and exhaust system of an internal-combustion engine, comprising an intake pipe and an exhaust pipe, wherein the intake pipe and / or the exhaust pipe are / is provided with reflection tubes. The invention enables the internal-combustion engine to have the pressure wave regulation function and control intake and exhaust pressure waves of the internal-combustion engine by arranging the pressure wave reflection tubes on the intake and exhaust system of the internal-combustion engine, thereby improving the performance indexes, i.e. exhaust temperature, economy, emission, and the like, of the internal-combustion engine.

Description

technical field [0001] The invention relates to an internal combustion engine, in particular to an intake and exhaust system of the internal combustion engine. Background technique [0002] The intake and exhaust piping system of internal combustion engine is closely related to the performance index of internal combustion engine, which is an important research direction of internal combustion engine technology. The pressure fluctuation in the pipeline must be considered in the design of the intake and exhaust piping system. The relevant parameters of the pressure wave in the pipeline are important indicators of whether the pipeline design is reasonable, and also directly affect the performance indicators of the engine. [0003] For the intake system of the internal combustion engine, it is hoped that the pressure at the intake valve is at the peak position when the intake valve is closed, so that a larger intake charge can be obtained, which is beneficial to the organization...

AI Technical Summary

Problems solved by technology

[0006] The measure of isolating the pressure wave by shrinking the nozzle cannot completely avoid the interference of the pressure wave of each pressure cylinder. The MPC exhaust pipe often has the problem of uneven exhaust temperature and high exhaust temperature of individual cylinders.

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