Valve especially for hydraulic automotive brake systems
AssigneeContinental Teves AG & Co. oHG
InventorChristoph Voss
Life of this patent
Estimating the term…
Abstract
The present invention relates to a valve, especially for slip-controlled brake systems in automotive vehicles, with a valve tappet (4) guided in a valve housing (5) and including a valve closure member (6), with a valve seat (7) facing the valve closure member (6), and with a piezoelectric element (1) for actuating the valve closure member (6). A first and a second force transmission element (2, 3) is arranged between the piezoelectric element (1) and the valve tappet (4), wherein the first force transmission element (2) is made of a high-strength material that elastically deforms the second force transmission element (3) in the direction of the valve in the direction of the valve tappet (4) when the piezoelectric element (1) is activated electrically.
Claims21
Valve, especially for slip-controlled wheel brakes, with a valve tappet (4) guided in a valve housing (5) and including a valve closure member (6), with a valve seat (7) facing the valve closure member (6), and with a piezoelectric element (1) for actuating the valve closure member (6), wherein a first and a second force transmission element (2, 3) is interposed between the piezoelectric element (1) and the valve tappet (4),
- characterized in that the first force transmission element (2) is made of a high-strength material which elastically deforms the second force transmission element (3) in the direction of the valve tappet (4) when the piezoelectric element (1) is activated electrically.
Valve as claimed in any one of the preceding claims,
- characterized in that the second force transmission element (3) is preloaded by choosing the adjustment depth of the piezoelectric element (1) in the valve housing (5).
Valve as claimed in any one of the preceding claims,
- characterized in that for sensing the hydraulic pressure by way of the two force transmission elements (2, 3), the pressure applied to the valve closure member (6) acts on the piezoelectric element (1), and the electric change in voltage of the piezoelectric element resulting from the mechanical deformation is converted into a pressure value by means of an electronic evaluating unit.
Valve as claimed in any one of the preceding claims,
- characterized in that the second force transmission element (3) seals the hydraulically applied inside area of the valve housing (5) in relation to the dry inside area of the valve housing (5).
Valve as claimed in any one of the preceding claims,
- characterized in that for sensing the hydraulic pressure by means of the two force transmission elements (2, 3), the pressure applied to the valve closure member (6) acts on the piezoelectric element (1), and the electric change in voltage of the piezoelectric element resulting from the mechanical deformation is converted into a pressure value by means of an electronic evaluating unit.
Dependencies are inferred from the claim text.