Engine cylinder pressure sensor

Details Engine cylinder pressure sensor Engine cylinder pressure sensor

2005-09-06

2005-09-06

Oen, William (Department: 2855)

Measuring and testing

Fluid pressure gauge

Electrical

Reexamination Certificate

active

06938491

ABSTRACT:
A pressure sensor for an internal combustion engine cylinder. The sensor has a housing with a pair of ends and a bore that extends through the housing. A barrel is mounted in the bore toward one end. The barrel has a cavity. A piezoelectric body is mounted in the cavity. The piezoelectric body has a first and second electrode. The piezoelectric body generates an electrical signal that is indicative of the pressure in the cylinder. A plate is mounted adjacent the barrel. The plate retains the barrel in the housing. An electronic circuit is mounted in the bore toward the other end. The electronic circuit is electrically connected to the electrodes. The electronic circuit receives the electrical signal from the electrodes and provides a conditioned electrical signal as an output.

REFERENCES:
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patent: 3673443 (1972-06-01), Siegel
patent: 3801838 (1974-04-01), Kistler
patent: 4524625 (1985-06-01), Takeuchi
patent: 4620438 (1986-11-01), Howng
patent: 5025228 (1991-06-01), Gerard et al.
patent: 5777239 (1998-07-01), Fuglewicz
patent: 6138654 (2000-10-01), Pretorius et al.
patent: 6279395 (2001-08-01), Insalaco
patent: 1246925 (1971-09-01), None
Dirk Schiefer, Ralf Maennel, Wesley Nardoni “Advantages of Diesel Engine Control Using In-Cylinder Pressure Information for Closed Loop Control” Mar. 3, 2003 Reprinted fromElectronic Engine Controls2003 (SP-1749).

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