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Camshaft phaser

A phaser and camshaft technology, applied in the direction of machines/engines, valve devices, mechanical equipment, etc., can solve problems such as high oil pressure, reliability of camshaft phasers and adverse effects of manufacturing costs

Active Publication Date: 2020-02-25
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the working process of the camshaft phaser, the oil pressure of the oil in each oil chamber may be too high, which will have a negative impact on the reliability and manufacturing cost of the camshaft phaser

Method used

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Examples

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings. The camshaft phaser according to the present invention has a substantially cylindrical shape as a whole, and unless otherwise specified, the axial, radial and circumferential directions of the present invention refer to the axial, radial and circumferential directions of the camshaft phaser respectively; side refers to Figure 1a The left side of the axis, the other side of the axis refers to Figure 1a on the right side of the .

[0026] Such as Figure 1a and Figure 1b As shown, a camshaft phaser according to an embodiment of the present invention includes a stator 1 , a rotor 2 , a sealing cover 3 and an end cover 4 .

[0027] In this embodiment, the stator 1 includes a cylindrical stator main body 11 and four stator protrusions 12 protruding radially inward from the stator main body 11 . The four stator protrusions 12 all extend in t...

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Abstract

The invention relates to camshaft phaser. The camshaft phaser comprises a stator, a rotor and a sealing cover, wherein a plurality of oil chambers distributed in the circumferential direction are formed among the stator, the rotor and the sealing cover; and a plurality of through holes extending in the axial direction and penetrating through the sealing cover are formed in the sealing cover, eachoil chamber communicates with at least one through hole correspondingly, and each through hole is provided with a control valve enabling the through hole to open / close, so that the control valves control the through holes to open only when the oil pressure in the oil chambers is greater than a predetermined value. In this way, the camshaft phaser can control the oil pressure in the oil chambers inside the camshaft phaser, and high oil pressure is eliminated, so that the reliability of the camshaft phaser is improved; and in addition, by controlling the oil pressure, the load borne by the partsof the camshaft phaser is reduced, and the requirements for material performance such as tensile strength and fatigue strength of related parts are reduced so that the manufacturing cost can be saved.

Description

technical field [0001] The present invention relates to camshaft phasers. Background technique [0002] In the prior art, the engine valve timing system is a system for controlling the opening and closing time of the valves of the automobile engine, and the engine valve timing system optimizes the working performance of the engine by controlling the opening and closing of the valves. The camshaft phaser is one of the most important components of the engine valve timing system. [0003] Generally, a camshaft phaser according to the prior art includes a stator, a rotor and an end cover (sealing cover). The end cover is fixed on the stator from both axial sides. The rotor is disposed radially inside the stator and can rotate relative to the stator. The stator includes a cylindrical stator main body and a plurality of stator protrusions protruding radially inward from the stator main body. The rotor includes a cylindrical rotor body and a plurality of rotor blades protruding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/344F01L1/46
CPCF01L1/3442F01L1/46
Inventor 何艳桦陈宇
Owner SCHAEFFLER TECH AG & CO KG
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