Engine intake manifold and engine

Abstract

The invention provides an engine intake manifold, comprising an air inlet, a pressure stabilizing chamber, a plurality of air passages, a PCV pipe joint and a fuel vapor pipe joint, the pressure stabilizing chamber communicates with the air intake, and the The plurality of air passages communicate with the plenum chamber, the intake manifold also includes a subchamber communicating with the plenum chamber, and the PCV pipe joint and fuel vapor pipe joint are connected to the subchamber . The engine intake manifold of the present invention is provided with an auxiliary chamber communicated with the pressure stabilizing chamber, and the PCV pipe joint and the fuel vapor pipe joint are connected on the auxiliary chamber, so that the PCV gas and the fuel vapor pass through the PCV pipe joint and the fuel vapor respectively. The steam pipe joint enters the auxiliary chamber, and then enters the plenum chamber from the plenum chamber through the auxiliary chamber, so that PCV gas and fuel vapor can mix with the fresh air entering the plenum chamber and then evenly enter the air passages of each cylinder to ensure the combustion of each cylinder In order to solve the problems of uneven combustion of each cylinder and large engine vibration caused by the existing intake manifold.

Description

technical field [0001] The invention belongs to the technical field of engine air intake, in particular to an engine intake manifold and an engine. Background technique [0002] The airway structure of the intake manifold is one of the main factors affecting the intake air volume and uniformity of the engine. The maximum air intake volume of each cylinder of the engine is the premise to ensure the highest power of the engine; and the uniformity of the intake air (including air, mixed gas of the crankcase forced ventilation system (hereinafter referred to as PCV gas) and fuel vapor) of each cylinder directly affects the engine. The uniformity and uniformity of each cylinder's working ability will cause problems such as unstable torque output and large engine vibration. output capacity. Therefore, a reasonable design of the airway structure of the intake manifold should not only reduce the intake pressure loss and increase the intake air volume, but also ensure the uniformit...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that due to the limitations of the space structure and the mold structure of the existing intake manifold, it can only meet the requirement that one of the mixed gas of PCV gas and fuel vapor enters the cylinder uniformly, but cannot ensure the combustion of each cylinder. defects of uniformity, providing an engine intake manifold

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