Measuring and testing – Engine detonation – Specific type of detonation sensor
Reexamination Certificate
2005-12-13
2005-12-13
Williams, Hezron (Department: 2856)
Measuring and testing
Engine detonation
Specific type of detonation sensor
Reexamination Certificate
active
06973820
ABSTRACT:
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.
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Hiramatsu Hiromi
Nakashima Fuminori
Watarai Takehiro
Denso Corporation
Fitzgerald John
Nixon & Vanderhye PC
Williams Hezron
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