US PATENT SUBCLASS 123 / FOR 114
.~.~ Responsive to instantaneous changes in engine speed (e.g., roughness) (123/419)

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

FOR 101  DF  SPARK IGNITION TIMING CONTROL (123/406) {16}
FOR 113  DF  .~ Speed responsive (123/418) {2}
FOR 114.~.~ Responsive to instantaneous changes in engine speed (e.g., roughness) (123/419)

DEFINITION

Classification: 123/FOR.114

Responsive to instantaneous changes in engine speed (e.g., roughness):

Subject matter in which the timing control is responsive to instantaneous changes in engine speed, which signal at least partial misfires in combustion.