Valve, especially for hydraulic automotive brake systems
AssigneeContinental Teves AG & Co. oHG
InventorChristoph Voss
Life of this patent
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Abstract
The present invention relates to a valve, especially for slip-controlled brake systems in automotive vehicles, with a valve tappet guided in a valve housing and including a valve closure member, with a valve seat facing the valve closure member, and with a piezoelectric element for actuating the valve closure member. A first and a second force transmission element is arranged between the piezoelectric element and the valve tappet, wherein the first force transmission element is made of a high-strength material that elastically deforms the second force transmission element in the direction of the valve tappet when the piezoelectric element is activated electrically.
Claims20
A valve comprising:
- a valve tappet guided in a valve housing and including a valve closure member;
- a valve seat facing the valve closure member;
- and
- a piezoelectric element for actuating the valve closure member,
- wherein a first and a second force transmission element is interposed between the piezoelectric element and the valve tappet,
- wherein the first force transmission element is made of a high-strength material which elastically deforms the second force transmission element in the direction of the valve tappet when the piezoelectric element is activated electrically, and
- wherein for sensing the hydraulic pressure by way of the two force transmission elements, the pressure applied to the valve closure member acts on the piezoelectric element, and the electric change in voltage of the piezoelectric element resulting from mechanical deformation is converted into a pressure value by means of an electronic evaluating unit.
A valve comprising:
- a valve tappet guided in a valve housing and including a valve closure member;
- a valve seat facing the valve closure member;
- a piezoelectric element for actuating the valve closure member;
- a first force transmission element interposed between the piezoelectric element and the valve tappet and abutting the piezoelectric element;
- a second force transmission element interposed between the piezoelectric element and the valve tappet and abutting the valve tappet, wherein the first force transmission element is made of a high-strength material which elastically deforms the second force transmission element in the direction of the valve tappet when the piezoelectric element is activated electrically;
- and
- an electronic evaluating unit responsive to the piezoelectric element,
- wherein the electronic evaluating unit measures the electric change in voltage of the piezoelectric element and converts it into a pressure value for sensing the hydraulic pressure applied to the valve closure member.
Dependencies are inferred from the claim text.