发明授权
- 专利标题: Tire pressure sensor for motor vehicles
- 专利标题(中): 汽车轮胎压力传感器
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申请号: US347775申请日: 1989-05-26
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公开(公告)号: US4954677A公开(公告)日: 1990-09-04
- 发明人: Gunther Alberter , Helmut Deeg , Gerhard Hettich , Klaus Neidhard , Hans-Dieter Schmid , Hans Schrumpf
- 申请人: Gunther Alberter , Helmut Deeg , Gerhard Hettich , Klaus Neidhard , Hans-Dieter Schmid , Hans Schrumpf
- 申请人地址: DEX Stuttgart
- 专利权人: Robert Bosch GmbH
- 当前专利权人: Robert Bosch GmbH
- 当前专利权人地址: DEX Stuttgart
- 优先权: DEX3639688 19861120
- 主分类号: G01L17/00
- IPC分类号: G01L17/00 ; B60C23/00 ; B60C23/04
摘要:
A tire pressure sensor to be fastened to a rim of a vehicle wheel for sensing an inflation pressure of a tire mounted on the rim, the tire pressure sensor comprising a reference pressure chamber having a gas filled reference pressure volume, an electrically conductive diaphragm for sealingly separating the reference pressure chamber at a tire interior, a sensor electric circuit, a contact pin located in the reference pressure chamber and cooperating with the electrically inductive diaphragm for closing the sensor electric circuit when the tire inflation pressure is at a predetermined value, and an additional pressure chamber communicating with the reference pressure chamber and deformable to change the reference pressure volume therein to thereby establish a predetermined reference pressure in the reference pressure chamber.
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