A variable air intake system for a gasoline engine

Abstract

A variable air intake system for a gasoline engine, which overcomes the problem that the drum chamber, the vacuum chamber and the pressure stabilizing chamber are arranged in parallel in the upper, middle and lower rows in the prior art, occupying a large space, and the drum is not running smoothly The problem is that the roller is provided with 4 through-flow holes on the upper part of the roller and 4 through-flow holes on the side of the roller along the axial direction, and the roller is installed through a bearing inside the intake manifold assembly, and the roller passes through the left shaft of the roller Connected with the vacuum actuator, there is a vacuum chamber and a roller installation chamber in the lower part of the pressure stabilizing chamber. On the lower wall of the stabilizing chamber, there are 4 lower walls of the stabilizing chamber corresponding to the flow holes on the upper part of the roller. Through the flow holes, there are 4 flow holes on the side wall of the middle piece of the intake manifold corresponding to the 4 side flow holes on the drum on the side wall of the middle piece of the intake manifold. The beneficial effect is that it saves The space occupied by the variable manifold is smaller, which is conducive to the assembly of the complete engine, and the drum runs more smoothly.

Description

technical field [0001] The invention belongs to the technical field of automobile engine air intake systems, in particular to a variable intake system of a naturally aspirated gasoline engine that switches the length of an intake air passage by rotating a drum. Background technique [0002] In order to achieve the purpose of improving engine economy and power, the engine is required to be equipped with a shorter intake manifold at high speed and high load; In the traditional naturally aspirated gasoline engine, the longer intake manifold has high torque at low speed and low power at high speed; the short intake manifold is just the opposite, with low torque at low speed and high power at high speed. Gasoline engine air intake system can only meet one favorable condition, such as figure 2 and image 3 The existing intake manifold shown is formed by welding the upper piece 01, the middle piece 02 and the lower piece 03 as a whole, and the middle piece 02 is provided with a p...

AI Technical Summary

Problems solved by technology

However, by Figure 3 to Figure 5 As shown, the specific structure of the drum and the installation relationship between the drum and the intake manifold are not disclosed. Neither the installation structure between the drum and the intake manifold nor the implementation of the control actuator is disclosed. Therefore, It is only an incomplete technical solution. In addition, the utility model vacuum chamber and the pressure stabilizing chamber are composed of the upper middle piece and the lower middle piece. Arranged in parallel rows, occupying a large space

The known installation relationship between the drum and the intake manifold is that the two ends of the drum are processed with concave shaft holes, through which the shaft holes are fitted with the relevant shafts, so that the drum will run very unstable

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