Variable-vortex air inlet passage of multi-valve engine

Abstract

The invention discloses a variable-vortex air inlet passage of a multi-valve engine, and belongs to the technical field of air inlet systems of internal combustion engines. The variable-vortex air inlet passage comprises an air inlet manifold, a first air inlet passage, a second air inlet passage, an air inlet adjusting channel, a vortex adjusting valve and a vortex adjusting valve shaft. The air inlet manifold is connected with the first air inlet passage and the second air inlet passage; the first air inlet passage is communicated with the second air inlet passage via the air inlet adjusting channel; the vortex adjusting valve is mounted in the air inlet adjusting channel; the vortex adjusting valve is fixed onto the vortex adjusting valve shaft and rotates around the center of the vortex adjusting valve shaft; the opening of the vortex adjusting valve can be changed along with change of working conditions of the engine. Compared with the prior art, the variable-vortex air inlet passage has the advantages that the shortcoming of deterioration of the flow capacity of an existing air passage due to severe throttle effects which are realized for airflow in the existing air passage by an air valve during variable-vortex adjustment can be overcome; pumping loss of the engine can be greatly reduced; vortex in a cylinder can be conveniently controlled by the engine under the different working conditions, combustion can be organized, and the excellent fuel economy, dynamic performance and emission performance can maintain.

Description

technical field [0001] The invention relates to a variable vortex intake port for a multi-valve engine, which belongs to the technical field of intake systems for internal combustion engines. Background technique [0002] With the continuous improvement of engine power and economy requirements and the increasingly stringent emission regulations, the potential of energy saving and emission reduction in various parts of the engine is constantly being tapped. People have always regarded improving the combustion quality as the main way to improve the power and economy of diesel engines, and optimizing the formation of mixture gas is an important means to improve combustion. The main factors affecting the formation of the mixture in the direct injection diesel engine are: the kinetic energy of the oil beam, the geometric shape of the combustion chamber and the kinetic energy of the air. The kinetic energy of the air is mainly determined by the intake vortex. [0003] In order t...

AI Technical Summary

Problems solved by technology

This adjustment method has the following defects: 1. The cross-sectional area of ​​the flow is reduced during the adjustment of the throttle butterfly valve, which easily leads to insufficient intake air; 2. Air resistance and gas separation will occur near the throttle valve plate, which increases the local resistance of intake air loss

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