Measuring and testing – Engine detonation – Specific type of detonation sensor
Reexamination Certificate
2005-08-02
2005-08-02
McCall, Eric S. (Department: 2855)
Measuring and testing
Engine detonation
Specific type of detonation sensor
C073S115060
Reexamination Certificate
active
06923042
ABSTRACT:
An earth electrode is formed on the brim surface of the plug insulator and on the outer surface of the middle portion of the plug insulator along the axial direction. The earth electrode connected with one side of the combustion pressure sensor is provided on a whole surface opposite to a combustion pressure signal electrode. The earth electrode works also a shield member for shielding the high frequency noise generated inside the insulator. A part of the outer side of the earth electrode is covered by an insulating layer for insulating the earth electrode from the combustion pressure signal electrode. The combustion pressure sensor held between the insulator brim and electrode brim is given a prescribed compression load by a metal cylindrical bolt which presses down the electrode brim of the toward the combustion pressure sensor.
REFERENCES:
patent: 2003/0183215 (2003-10-01), Miwa et al.
patent: 2003/0183218 (2003-10-01), Maekawa et al.
patent: 2004/0083795 (2004-05-01), Butler et al.
patent: 61-224288 (1986-10-01), None
patent: 64-54686 (1989-03-01), None
patent: 1-283786 (1989-11-01), None
patent: 2900034 (1999-03-01), None
patent: 2900061 (1999-03-01), None
Denso Corporation
McCall Eric S.
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