Ionization sensor
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United States of America Patent
Stats
-
Nov 19, 1991
Grant Date -
N/A
app pub date -
Apr 12, 1990
filing date -
Oct 16, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cylinder head gasket is described which also serves as an electrode of an ionization sensor. The gasket (16) has an electrically conductive surface portion (16c) which is electrically insulated from the cylinder head (14) and from the engine block (12) so that it may serve as an electrode of an ionization sensor. The gasket of the preferred embodiment is of five layer sandwich construction comprising two outer layers (16a, 16b) of soft metal capable of deformation under pressure to effect a gas tight seal with the block (12) and the cylinder head (14), a central core (16c) of electrically conductive material to serve as an ionization electrode and two layaers of ceramic material (16e, 16f) insulating the central core (16c) from the two outer layers (16a, 16b).
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