Automotive engine intake manifold

Abstract

The invention discloses an automotive engine intake manifold. A voltage-stabilizing cavity consists of a straight segment and an oblique upturned inlet manifold; the inlet manifold is connected with a throttle valve installation flange; a plurality of air inlet bent pipes are connected between the straight segment of the voltage-stabilizing and the installation flange of a cylinder cover, wherein, the quantity of the air inlet bent pipes is equal to that of the cylinders; a 145-155 degrees of included angle is arranged between the axes of the straight segment of the voltage-stabilizing and the inlet manifold; each air inlet bent pipe has the same shape and the same length, the length of each air inlet bent pipe is 390-410mm, and the inner diameter thereof is 34-37mm. By changing the shape, length and inner diameter of the air inlet bent pipe, and the included angle between the axes of the straight segment of the voltage-stabilizing and the inlet manifold, the automotive engine intake manifold of the invention can greatly increase the volumetric efficiency of the cylinder, thus improving the power performance of the engine, so that the maximum power of the engine can be increased by 17%, and the maximum torque can be increased by 20%, thereby greatly reducing vibration and noise of the engine.

Description

technical field [0001] The invention relates to an automobile component, in particular to an intake manifold on an automobile engine. Background technique [0002] The intake manifold of the automobile engine is installed between the engine cylinder head and the throttle valve, and its main function is to meet the individual intake of each cylinder. The intake manifold is generally composed of a pressure stabilizing chamber, an intake elbow, a throttle valve mounting flange and a cylinder head mounting flange. The stabilizing chamber is a cylindrical structure with one end open and the other closed. It consists of an upturned intake manifold, which is connected to the throttle valve mounting flange. A plurality of intake elbows are connected between the straight section of the plenum chamber and the mounting flange of the cylinder head, and the number of intake elbows is equal to the number of cylinders. In the traditional structure, there is an included angle of about 130...

AI Technical Summary

Problems solved by technology

In the traditional structure, there is an included angle of about 130° between the axis of the straight section of the plenum and the axis of the intake manifold. There will be sharp bends in the process, which will make the gas flow not smooth, which will affect the charging efficiency of the cylinder, resulting in poor engine performance

At the same time, the intake elbows are usually distributed in a comb shape, and the lengths of each intake elbow are different, but the inner diameters are equal (about 40mm), so that the air intake of each cylinder is uneven, which will cause engine vibration and noise.

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