Guard for securing the torsion spring at the front end of the camshaft phaser

Abstract

The invention relates to a shield for fixing the torsion spring at the front end of a camshaft phase adjuster, which has a shield which is pressed by stacking the tail of the rivet and riveted with the cover plate of the phaser; The clad outer ring is integrally formed in a "convex" shape, and the center of the shield is provided with an avoidance hole for easy assembly and disassembly of the central bolt; the torsion spring cover is provided with a torsion spring fixing port; the clad outer ring has a ring array There are four avoidance grooves which facilitate full threaded contact between the mounting screw and the cover plate and increase the screw tightening force, and four shield rivet holes which are concentric with the rivet holes on the cover plate of the phaser and correspond one-to-one. The present invention not only solves the problem of poor fit between the central bolt and the phaser and large leakage, but also solves the problem of difficulty in installing the torsion spring and the risk of loosening during installation and transportation of the torsion spring. At the same time, the cylindrical torsion spring The structure reduces the centrifugal force of the torsion spring and improves the service life and safety performance of the torsion spring.

Description

technical field [0001] The invention relates to a variable valve timing system, in particular to a shield for fixing the torsion spring at the front end of a camshaft phase adjuster. Background technique [0002] The variable valve timing system is widely used in new gasoline and diesel automobile engines. It can increase engine power and torque, and reduce fuel consumption and exhaust emissions. The camshaft phase adjuster is an important executive component in the variable valve timing system. According to the control signal sent by the engine ECU control system, the oil control valve switches the oil channel leading to the camshaft phaser to control the camshaft phaser. The angle of rotation, so as to achieve the purpose of precise control of valve timing. In order to improve the response speed of the phaser, increase the driving torque, and realize the low oil pressure quick reset of the exhaust phaser, the usual practice is to add a torsion spring at the front end of t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a shield for fixing the torsion spring at the front end of the camshaft phase adjuster which solves the difficulty in installing the torsion spring and the risk of the torsion spring being loose during installation and transportation

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