Intake manifold gasket device for engine

Abstract

The invention relates to an intake manifold gasket device for an engine, which comprises a gasket body 1, gasket inner cavities and channels 3a-3c, wherein the gasket inner cavities are used for communicating an intake manifold and a cylinder cover air duct; and the channels 3a-3c make cavities 2a-2d communicated mutually. The intake manifold gasket device can ensure that: the pumping loss can be effectively reduced under the partial load condition, particularly low load condition of the engine, and the fuel economy of the engine is improved; the air intake flow of the engine can be improved by fully utilizing return gas in the cylinder at the later stage of the intake stroke under the low-speed condition so as to improve low-speed power performance of the engine; and under high-speed and high-load conditions, because the air ducts of cylinders are communicated mutually through connecting passages and the intake flow area is increased, the power performance and the fuel economy of the engine can be further improved.

Description

technical field [0001] The invention relates to the field of motor vehicle engines, in particular to an intake manifold gasket device for an engine Background technique [0002] As we all know, the intake manifold gasket of the engine is installed between the intake manifold and the cylinder head to seal the intake system. The gasket has the same number of gasket inner cavities as the intake passages, which are used to connect the intake manifold intake passages and the cylinder head intake passages. The traditional intake manifold gasket is only to meet the function of sealing the intake port, and the research on the gasket only selects different materials according to the type of engine and the structural characteristics of the end face of the intake port of the cylinder head to achieve the best sealing effect . [0003] In the process of engine design, taking a naturally aspirated gasoline engine as an example, in order to match the performance of the engine under high-...

AI Technical Summary

Problems solved by technology

[0003] In the process of engine design, taking a naturally aspirated gasoline engine as an example, in order to match the performance of the engine under high-speed and heavy-load conditions, the intake valve closing angle (intake valve closing, hereinafter referred to as IVC) is relatively large, resulting in low-speed engine operation. The closing angle of the intake valve corresponding to the condition is too large, and there is a phenomenon that the mixture in the cylinder flows back into the intake port, which leads to a decrease in the intake charge to a certain extent. In addition, due to the The high degree of vacuum will lead to a large pumping loss during the intake stroke, but the structure of the traditional intake manifold gasket cannot avoid the above problems

Images