US PATENT SUBCLASS 73 / 35.03
.~ Combustion signal compared to reference signal varied by a condition of the engine

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

35.01  DF  ENGINE DETONATION (E.G., KNOCK) {4}
35.03.~ Combustion signal compared to reference signal varied by a condition of the engine {2}
35.04  DF  .~.~> Including calculation means
35.05  DF  .~.~> Automatic gain control or feedback control

DEFINITION

Classification: 73/35.03

Combustion signal compared to reference signal varied by a condition of the engine:

(under subclass 35.01) Subject matter including a combustion signal produced by a sensing means whose characteristic changes in response to the combustion and which is compared with a reference signal responsive to a condition of the engine to determine detonation.

(1) Note. A reference signal is presumed to be varied by a condition of the engine unless otherwise stated as being fixed.

(2) Note. The reference signal may be derived from the combustion itself as, for example, by integration.