Piezoelectric pressure sensor suitable for sensing pressure at h

Details Piezoelectric pressure sensor suitable for sensing pressure at h Piezoelectric pressure sensor suitable for sensing pressure at h

1996-12-13

1998-12-22

Dombroske, George M.

Measuring and testing

Fluid pressure gauge

Diaphragm

73702, 73DIG4, 73115, 310338, G01L 908, G01L 708

Patent

active

058522450

ABSTRACT:
A piezoelectric pressure sensor for detecting pressure in a combustion chamber of an internal combustion engine includes a backing plate secured within a housing. The sensor also includes a resilient prestress plate stacked on the backing plate. The resilient plate is formed of silicone elastomer. A sensor element is stacked on the resilient plate. The sensor element is composed of a piezoelectric material formed from a mixture of lead titanate and lead zirconate. A thermally insulating plate is stacked on the sensor element and a diaphragm plate is stacked on the thermally insulating plate and also secured to the housing. The diaphragm plate is exposed to combustion atmosphere and is adapted to transmit a pressure being determined onto the sensor element.

REFERENCES:
patent: 3801838 (1974-04-01), Kistler
patent: 4519254 (1985-05-01), Sonderegger et al.
patent: 5142914 (1992-09-01), Kusakabe et al.
patent: 5249468 (1993-10-01), Benedikt et al.

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