car engine intake manifold

Abstract

The utility model relates to an intake manifold of an automobile engine. The pressure-stabilizing chamber is composed of a straight section and an intake manifold that is inclined upwards. A plurality of intake elbows are connected between them, and the number of intake elbows is equal to the number of cylinders, and the axis of the straight section of the pressure-stabilizing chamber and the axis of the intake manifold have an included angle of 145-155°; The shape and length of each intake elbow are the same, and the length of each intake elbow is 390-410 mm, and the inner diameter is 34-37 mm. By changing the shape, length, inner diameter of the intake elbow, and the angle between the axis of the straight section of the pressure-stabilizing chamber and the axis of the intake manifold, the invention can greatly improve the charging efficiency of the cylinder, thereby improving the power performance of the engine. The maximum power of the engine can be increased by 17%, the maximum torque can be increased by 20%, and the vibration and noise of the engine can be greatly reduced.

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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