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Control valve for controlling pressure-medium flows comprising integrated check valve

A pressure medium and control valve technology, which is applied in the direction of valve devices, thin material processing, machines/engines, etc., can solve problems such as damage and component damage, and achieve the effect of simple methods, fixed support, and low-cost technical implementation solutions

Active Publication Date: 2014-03-05
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If other hydraulic components are connected to the pressure medium circuit, this pressure peak can have the consequence that these components are damaged or destroyed

Method used

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  • Control valve for controlling pressure-medium flows comprising integrated check valve
  • Control valve for controlling pressure-medium flows comprising integrated check valve
  • Control valve for controlling pressure-medium flows comprising integrated check valve

Examples

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Embodiment Construction

[0040] refer to figure 1 To 3, a first embodiment of the control valve according to the present invention is first explained. The control valve 1 is part of a hydraulic adjustment mechanism for a hydraulic rotary piston adjuster of an internal combustion engine, designated generally by the reference number 2 .

[0041] The rotary piston adjuster 2 comprises an outer rotor 4 in drive connection to a crankshaft (not shown) and an inner rotor 5 connected in a rotationally fixed manner to a camshaft 3 , wherein the outer rotor and the inner rotor are relative to the camshaft 3 The common axis of rotation is arranged concentrically. The outer rotor 4 is rotationally coupled to the crankshaft via a sprocket 6 and a (not shown) chain drive. It is also conceivable to drive the outer rotor 4 to the crankshaft via a belt drive or a gear drive. The outer rotor 4 is mounted on the inner rotor 5 in a rotationally adjustable manner. The inner rotor 5 has a central opening (not shown in ...

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PUM

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Abstract

A control valve for controlling pressure medium flows, including: a valve housing having a hollow construction and having at least one feed connection, at least two working connections, and at least one discharge connection; a control piston held displaceably inside the valve housing, through which, dependent on position, the feed connection can be connected via at least one pressure medium line to the one or to the other working connection, while the respectively other working connection is connected via at least one second pressure medium line to the discharge connection. The control piston has a piston cavity and the first pressure medium line includes a feed opening allocated to the feed connection and a discharge opening allocated to the working connections, with each of these openings opening into the piston cavity. At least one check valve that can be hydraulically opened and that releases the first pressure medium line in the feed direction is provided, having a closing part that has a sealing surface, by which part a valve opening can be closed. The control valve has an elastically deformable closing part, such that the sealing surface thereof is movable, through elastic deformation of the closing part, into a closed position in which it lies against the valve opening in sealing fashion and an open position in which the valve opening is completely open, one of the openings of the control piston acting as valve opening. Alternatively, the closing part is mounted resiliently via at least one spring tongue.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines and, according to its genus, to a control valve according to the preamble of claim 1 with an integrated non-return valve for controlling a flow of a pressure medium. Background technique [0002] In internal combustion engines with mechanical valve controls, the gas exchange valves are actuated via a camshaft driven by the crankshaft, wherein the timing of the gas exchange valves can be determined by means of the arrangement and shape of the cams. The use of special devices for freely changing the phase between the crankshaft and the camshaft is sufficiently known, which are often referred to as "camshaft adjusters". Depending on the immediate operating state of the internal combustion engine, the timing of the gas exchange valves can be influenced in a targeted manner via the camshaft adjuster, whereby a series of advantageous effects such as reduced fuel consumption and reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/34F01L1/344
CPCF01L1/34F01L1/3442F01L2001/34433F01L2001/34426Y10T137/8667
Inventor 延斯·霍佩拉斯·布赫曼
Owner SCHAEFFLER TECH AG & CO KG
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