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Proportional valve, in particular for a camshaft adjuster

A proportional valve and check valve technology, applied in the field of proportional valves, can solve problems such as proportional valve failures, achieve the effects of short hydraulic distance, minimize the risk of assembly errors, and simple and reliable assembly

Active Publication Date: 2012-11-07
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a collision can lead to failure of the proportional valve

Method used

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  • Proportional valve, in particular for a camshaft adjuster
  • Proportional valve, in particular for a camshaft adjuster
  • Proportional valve, in particular for a camshaft adjuster

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] The proportional valve 1 according to the invention is provided for a camshaft adjuster of an internal combustion engine. The effect of the camshaft driven via the camshaft adjuster in the internal combustion engine is that it counteracts the force of the valve springs mounted on each gas exchange valve and opens the gas exchange valve for discharging burned gas and taking in fresh gas. gas valve. The rigid valve timing for the gas exchange valve is related to the achievable maximum medium pressure or torque maximum and its position in the usable speed range and the power achievable at rated speed A compromise in terms of design. An optimal adaptation of the timing of the gas exchange valves to the respective operating state can be achieved by means of the camshaft adjuster.

[0018] Proportional valve 1 basis figure 1 There is an electromagnetic control part 2, the control piston 6 of the control part and the valve piston 3 ( figure 2 , 3 , 4) Work together in pr...

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PUM

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Abstract

The invention relates to a proportional valve (1), comprising a piston guide sleeve (4) and a valve piston (3) that can be moved in the piston guide sleeve (4), and further comprising a check valve (13) arranged in a pressure medium inlet (10) to the proportional valve (1). According to the invention a proportional valve (1) is provided, in which the adaption of the check valve (13) to the proportional valve (1) is improved with respect to the prior art. This is achieved in that the check valve (13) is arranged in an annular gap (14) surrounding the piston guide sleeve (4) in the region of the pressure medium inlet (10).

Description

technical field [0001] The invention relates to a proportional valve with a piston guide sleeve and a valve piston movable in the piston guide sleeve and with a non-return valve arranged in the pressure medium inlet to the proportional valve and for such Proportional valve assembly method. Background technique [0002] A proportional valve of this type is known from DE 10 2005 060 111 A1. The proportional valve is designed for a camshaft adjuster for an internal combustion engine and is integrated in a central screw for attaching the camshaft adjuster to the camshaft. In this case, the proportional valve has a non-return valve which is designed in the form of a spring disk and is arranged laterally beside the proportional valve on the outer circumference of the central screw in the annular pressure medium inlet. Care must be taken during assembly that installing the non-return valve, which is arranged separately from the proportional valve, creates a risk of damage, at lea...

Claims

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Application Information

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IPC IPC(8): F01L1/344F16K15/14
CPCF01L1/344Y10T29/49405Y10T137/7837F01L1/047F01L2001/34426
Inventor 延斯·霍佩斯特凡·科尼亚斯王毅
Owner SCHAEFFLER TECH AG & CO KG
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