发明授权
US06973820B2 Combustion pressure sensor designed to ensure stability of output characteristic and sensitivity
有权
燃烧压力传感器设计用于确保输出特性和灵敏度的稳定性
- 专利标题: Combustion pressure sensor designed to ensure stability of output characteristic and sensitivity
- 专利标题(中): 燃烧压力传感器设计用于确保输出特性和灵敏度的稳定性
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申请号: US10865956申请日: 2004-06-14
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公开(公告)号: US06973820B2公开(公告)日: 2005-12-13
- 发明人: Takehiro Watarai , Fuminori Nakashima , Hiromi Hiramatsu
- 申请人: Takehiro Watarai , Fuminori Nakashima , Hiromi Hiramatsu
- 申请人地址: JP
- 专利权人: Denso Corporation
- 当前专利权人: Denso Corporation
- 当前专利权人地址: JP
- 代理机构: Nixon & Vanderhye PC
- 优先权: JP2003-167868 20030612; JP2003-167869 20030612; JP2004-074761 20040316
- 主分类号: F02B77/08
- IPC分类号: F02B77/08 ; G01L23/22
摘要:
A combustion pressure sensor for an internal combustion engine is provided. The sensor includes a sensing element such as a piezoelectric device sensitive to a physical load applied thereto to produce an electric signal indicative thereof and a bendable member. The bendable member is bent upon application of the combustion pressure in the engine to apply the physical load to the sensing element. Specifically, the physical load is applied to the sensing element which arises from the bend deformation of the bendable member, thus eliminating the need for a complete surface-to-surface contact between the sensing element and the bendable member. This results in a decreased unit-to-unit variation in sensitivity of combustion pressure sensors and ensures the stability of output characteristics of the combustion pressure sensor.