US PATENT SUBCLASS 73 / 35.01
ENGINE DETONATION (E.G., KNOCK)

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

35.01ENGINE DETONATION (E.G., KNOCK) {4}
35.02  DF  .~> Fuel rating (e.g., octane rating)
35.03  DF  .~> Combustion signal compared to reference signal varied by a condition of the engine {2}
35.06  DF  .~> Combustion signal compared to a fixed reference signal or utilizing a threshold value
35.07  DF  .~> Specific type of detonation sensor {3}

DEFINITION

Classification: 73/35.01

ENGINE DETONATION (E.G., KNOCK):

(under the class definition) Subject matter comprising a process or an apparatus for performing a test or measurement by determining or detecting abnormal rapid combustion in an internal combustion engine.

SEE OR SEARCH THIS CLASS, SUBCLASS:

116+, for engine or motor testing, per se, including pressure measuring in an engine or a motor.

570+, for testing (a) by applying vibration to a body or (b) by sensing vibration, per se.

700+, for a fluid pressure gage, per se.

865.6, for testing, per se, in a simulated environment.

SEE OR SEARCH CLASS 123, Internal-Combustion Engines,

425, for engine knock control of ignition timing and subclass 435 for knock control of a pressure responsive charge forming device.

324, Electricity: Measuring and Testing,

378+, for purely electrical testing of an internal combustion engine ignition system or device.

701, Data Processing: Vehicles, Navigation, and Relative Location,

111, for determining engine knock by use of an electrical computer wherein no more than a nominally recited knock sensor is claimed.