Variable air inlet manifold for gasoline engine

Abstract

The invention discloses a variable air inlet manifold for a gasoline engine. A short air passage and a long air passage which are communicated with each other are arranged in an air passage of the air inlet manifold, wherein a switching part which is used for opening or closing the short air passage is arranged at the air inlet of the short air passage. The switching part is a rotary drum capable of being in fixed-axis rotation, and a flow passing through hole is formed in the rotary drum along the direction vertical to the middle axis of the rotary drum; when the flow passing through hole in the rotary drum is enabled to be connected with the air inlet of the short air passage by rotating the rotary drum, the short air passage is in an opening state; and when the flow passing through hole in the rotary drum is enabled to be divorced from the air inlet of the short air passage by rotating the rotary drum, the short air passage is blocked and is in a closed state. The variable air inlet manifold for the gasoline engine has the advantages that the long air passage and the short air passage designed in the variable air inlet manifold are switched, and all air inlet branches are differently designed structurally, so that the uniformity of inlet air can be ensured, and the performance of the engine is improved.

Description

technical field [0001] The present invention relates to an intake manifold for an engine, in particular to a variable intake manifold for a gasoline engine. The length of the air passage is variable and the structure of each air passage is changed to ensure engine performance and uniform intake air. . Background technique [0002] The operating speed range of gasoline engines is getting wider and wider, and the intake air volume required for each working condition is different within the entire operating speed range. Gas enters the cylinder through the intake manifold to participate in combustion, but the current airflow entering the cylinder through the intake manifold is constant, which cannot meet the required intake air volume under various working conditions. Moreover, in order to ensure the uniformity of combustion in the cylinder, the deviation of the uniformity of the intake air of each cylinder must be kept within a small range at a certain speed of the engine, and...

AI Technical Summary

Problems solved by technology

The gas enters the cylinder through the intake manifold to participate in combustion, but the current airflow entering the cylinder through the intake manifold is constant, which cannot meet the required intake air volume under various working conditions

Moreover, in order to ensure the uniformity of combustion in the cylinder, the deviation of the uniformity of the intake air of each cylinder must be kept within a small range at a certain speed of the engine, and the current design of the intake manifold has the same size of each branch to ensure the uniformity of the intake air. The design schemes are more complex and not very clear

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