US PATENT SUBCLASS 701 / 111
.~.~.~.~ Vibration, roughness, knock

Current as of: June, 1999
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701 /   HD   DATA PROCESSING: VEHICLES, NAVIGATION, AND RELATIVE LOCATION

1  DF  VEHICLE CONTROL, GUIDANCE, OPERATION, OR INDICATION {19}
99  DF  .~ With indicator or control of power plant (e.g., performance) {2}
101  DF  .~.~ Internal-combustion engine {1}
102  DF  .~.~.~ Digital or programmed data processor {7}
111.~.~.~.~ Vibration, roughness, knock

DEFINITION

Classification: 701/111

Vibration, roughness, knock:

(under subclass 102) Internal-combustion engine control or indication wherein the digital or programmed data processing system is designed to control or sense vibration, roughness, or knocking condition of the engine.

SEE OR SEARCH CLASS

73, Measuring and Testing,

116+, for motor or engine testing.

123, Internal Combustion Engines,

406.16, for a knock control malfunction response system, subclass 406.21 for a closed loop feedback control of spark timing responsive to engine knocks, subclass 406.24 for a closed loop feedback control system responsive to instanteous changes in the engine speed (e.g. roughness, unstable combustion, etc.) and subclass 406.5 for acceleration and deceleration electronic ignition timing control.