Variable intake tumble adjusting mechanism for gasoline engine

Abstract

The invention provides a variable intake tumble adjusting mechanism for a gasoline engine, which is used for realizing the adjustment of intake tumble ratio and air input of the gasoline engine. The mechanism comprises a support body, a tumble adjusting valve assembly, a diversion plate assembly and an electric actuator; the support body is arranged between an intake manifold airway and an engine cylinder cover inlet channel; the tumble adjusting valve assembly is assembled with the support body in a matched way; the front end of the diversion plate assembly is assembled with the support body in a matched way; the rear end of the diversion plate assembly is extended to the engine cylinder cover inlet channel; and the electric actuator is arranged on the support body. The mechanism provided by the invention is simple in structure, compact in arrangement, convenient to install, and can be used for realizing continuous control for the intake tumble of the gasoline engine, thus, the requirement of the engine on the airflow states under different working conditions can be met; and the discharge performance, the economic performance and the power performance of the engine are improved.

Description

technical field [0001] The invention relates to an engine air intake control mechanism, in particular to an intake tumble adjustment mechanism of a gasoline engine controlled by an electric actuator, and belongs to the technical field of combustion engines. Background technique [0002] With the improvement of automobile emission standards and consumers' requirements for automobile performance, new technologies applied to automobile engines are also increasing. For gasoline engines, the intake air flow and intake tumble ratio determine the combustion conditions of the engine, thereby affecting the emissions and performance of the engine and the vehicle. Therefore, a mechanism that can adjust the tumble ratio is set on the gasoline engine, which can meet the requirements of the engine on the airflow state under different working conditions by adjusting the engine intake flow and tumble ratio, and improve the engine's emission and performance. Performance. However, the exist...

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Problems solved by technology

However, the existing variable intake tumble adjustment mechanism has defects in the following aspects: First, the variable intake tumble adjustment mechanism is mostly integrated with the intake manifold, which not only makes the intake manifold manufacturing process more complicated , and poor versatility; the second is that the existing variable intake tumble adjustment mechanism shaft is usually located in the middle of the tumble valve plate, installed at a position lower than the deflector, because the tumble valve plate and the guide The plates are not on the same straight line. When the tumble valve plate is opened, it will have a certain impact on the air flow; third, the existing variable intake tumble adjustment mechanism is controlled by a vacuum pneumatic actuator, and the pneumatic actuator generally can only realize Two-stage control not only cannot achieve continuous variable control of the intake tumble flow, but also the layout of the vacuum aerodynamic control system is cumbersome, with a large number of components and large volume, which will reduce the reliability of the entire system and increase the difficulty of system space layout. In addition, the vacuum control needs the engine to provide a continuous vacuum source, which has high requirements on the whole machine; Fourth, most of the existing variable tumble adjustment mechanisms have no valve plate position feedback function, which cannot realize the monitoring of the tumble valve plate position, and is difficult Judging whether the tumble valve plate is in motion increases the difficulty of fault diagnosis

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