An automobile engine pcv valve and its combined valve core

Abstract

The invention provides a vehicle engine PCV valve and a combined valve element thereof. The vehicle engine PCV valve comprises a first valve body, a thrust spring, a retainer ring, an O-shaped ring, the combined valve element, a large spring and a second valve body. The combined valve element of the vehicle engine PCV valve comprises a valve element head part and a valve head; the valve element head part adopts a material of metal; the valve base adopts a material of plastic; and the valve element head part and the valve base are fixedly connected as a whole. The combined valve element structure adopts two materials of metal and plastic; and the metal valve element head part exerts the heat treatment and surface treatment advantages of the metal material to improve the wear resistance of the combined valve element. The plastic valve exerts the advantages of the plastic in NVH performances, so that the mass of the combined valve element is reduced, and the impact inertia of the combinedvalve element is reduced. The metal valve element head part is molded through machining, and is combined with the plastic valve base by a reverse buckling structure through injection molding, so thatthe reliability of the combined valve element is guaranteed.

Description

technical field [0001] The invention relates to the field of automobile engines, in particular to an automobile engine PCV valve and a combined valve core thereof. Background technique [0002] The automobile engine is an important part of the automobile, so the research on the PCV valve of the automobile engine is particularly important. At present, the PCV valves of automobile engines are mostly plunger type PCV valves, and the plunger PCV valves are generally divided into metal spool PCV valves and plastic spool PCV valves according to different spool materials. For PCV valves with metal spools, the metal spool knocks against the air intake chamber at high speed during axial movement. There are generally sharp knocking sounds in idling or low speed conditions, which affects NVH performance. For the plastic spool PCV valve, the high-speed axial movement and radial rotation of the plastic spool will easily cause wear at the joint between the head of the spool and the air o...

AI Technical Summary

Problems solved by technology

Metal spool PCV valve, the metal spool knocks against the air intake chamber at high speed during the axial movement, and there is generally a sharp knocking sound in the idling or low-speed working conditions, which affects the NVH performance

For PCV valves with plastic spools, the plastic spool moves axially and rotates radially at high speed, and the joint between the head of the spool and the air outlet cavity is prone to wear and tear, resulting in deviations in characteristic flow.

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