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Hydraulic camshaft adjuster

A camshaft adjuster, hydraulic technology, applied in the direction of machine/engine, engine components, mechanical equipment, etc., can solve the problem of complex intermediate locking mechanism

Active Publication Date: 2020-08-28
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The intermediate locking mechanism is therefore designed to be relatively complex, which entails corresponding costs in the manufacture of the camshaft adjuster.

Method used

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  • Hydraulic camshaft adjuster
  • Hydraulic camshaft adjuster
  • Hydraulic camshaft adjuster

Examples

Experimental program
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Embodiment Construction

[0031] A camshaft adjuster 1 is shown schematically in the drawing, having a stator 2 and a rotor 3 rotatable relative to the stator 2 . The rotor 3 has a plurality of wings 4 which protrude into corresponding hydraulic chambers 5 of the stator 2 and separate the first subchamber A from the second subchamber B there. During normal operation of camshaft adjuster 1 , the desired relative rotational position between stator 2 and rotor 3 is produced by feeding hydraulic oil into subchamber A or subchamber B via central valve 6 .

[0032] Since the general mode of operation of this hydrostat is well known, only the novel features of the hydrocamshaft adjuster are described below. For the hydraulic control of this element, in particular via central valve actuation of the regulator, reference is made expressly, for example, to the applicant's DE 10 2013 226 437 B4, which contains detailed information on this.

[0033] During normal operation of the camshaft adjuster 1 , the partial ...

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Abstract

The invention relates to a hydraulic camshaft adjuster (1), wherein the locking system (7, 8) comprises a first and a second control element (7, 8). In order to approach the middle position easily, according to the invention the first control element (7) has a first and a second switch position, wherein in the first switch position a fluidic connection between the hydraulic pump (P) and a first ofthe two sub-chambers (B) and a fluidic connection between the other, second sub-chamber (A) and the tank (T) can be established, wherein in the second switch position a fluidic connection between thehydraulic pump (P) and the second of the two sub-chambers (A) and a fluidic connection between the other, first sub-chamber (B) and the tank (T) can be established, and wherein the second control element (8) is free from different switch positions and has no influence on the flow of hydraulic fluid.

Description

technical field [0001] The invention relates to a hydraulic camshaft adjuster comprising: [0002] - a stator in which the rotor is rotatably arranged, wherein the stator has at least one wing, wherein the wing is arranged in a hydraulic chamber of the stator such that the first subchamber is separated from the second subchamber, [0003] - a central valve controlling the flow of hydraulic fluid into the first subchamber and into the second subchamber, [0004] - a locking system by which the stator is locked in an intermediate position relative to the rotor, wherein the locking system comprises a first control element and a second control element, the first control element and the second control element are applied via a central valve The hydraulic fluid can be held in the unlocked position, and the control element can cause locking when the pressure of the hydraulic fluid is removed, wherein the first control element and the second control element can be brought into active...

Claims

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Application Information

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IPC IPC(8): F01L1/344
CPCF01L1/3442F01L2001/3443F01L2001/34463F01L2001/34466F01L2001/34469F01L2001/34426F01L2001/34459
Inventor 阿里·巴伊拉克达尔
Owner SCHAEFFLER TECH AG & CO KG
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