Variable inlet duct and inlet system containing same

Abstract

The invention provides a variable inlet pipe and the inlet system containing the variable inlet manifold. The inlet manifold comprises distributing pipe, control valve and resonator. Said distributing pipe comprises a first distributing pipe, a second distributing pipe and a third distributing pipe and three distributing pipes are connected with each other in parallel. Said control valve comprises a first control valve and a second control valve. Three distributing pipes connected in parallel and two control valves are adopted in the invention. By status switch of two control valves three different air-flowing paths are constituted so that air inlet channels under different rotating speed condition are distinguished and torque, power, volume efficiency and air inlet of engine can achieve better effect under the condition with high, middle and low speed zones.

Description

technical field [0001] The invention relates to a variable intake pipe and an intake system. Background technique [0002] The intake length of the traditional engine intake pipe is constant, which can only guarantee the good performance of the engine under a certain working condition, but cannot be adjusted during operation, so that the performance of the engine will decline under two extreme working conditions. Variable intake pipe length technology (VGIS) is an effective way to improve engine performance and reduce harmful emissions. [0003] The variable length technology of the intake pipe utilizes the pressure wave generated by the inertia of the intake air flow to improve the inflation efficiency. When the gas flows to the intake valve at high speed, if the intake valve is closed suddenly, the airflow near the intake valve stops suddenly, and the gas in the intake pipe continues to flow due to inertia, the gas near the intake valve is compressed and the pressure rise...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the disadvantages of the existing two-stage variable intake pipe and its intake system that the volumetric efficiency is not high and the intake effect is not good under the working condition of medium-speed driving, and provides a method to make the engine rotate at high, medium and low speeds. The variable intake pipe and its intake system can achieve better results in terms of torque, power, volumetric efficiency, and intake air

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