US PATENT SUBCLASS 123 / 406.43-- .~.~.~.~.~ Responsive to derivative, integral or average of pressure

US PATENT SUBCLASS 123 / 406.43
.~.~.~.~.~ Responsive to derivative, integral or average of pressure

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

406.11	DF	SPARK IGNITION TIMING CONTROL {5}
406.12	DF	.~ Electronic control {10}
406.19	DF	.~.~ Closed loop feedback control of spark timing {5}
406.26	DF	.~.~.~ Combustion condition responsive {4}
406.41	DF	.~.~.~.~ Engine cylinder pressure responsive {2}
406.43		.~.~.~.~.~ Responsive to derivative, integral or average of pressure

DEFINITION

Classification: 123/406.43

Responsive to derivative, integral or average of pressure:

(under subclass 406.41) Subject matter wherein the regulating means for varying spark ignition timing (a) receives a signal indicative of the force per unit area of the fluid in the combustion chamber, and (b) either (1) determines a rate of change of the force per unit area as a function of time, (2) determines on a continuous basis the total value of the force per unit area being measured as a function of time, or (3) determines on a continuous basis the sum of the forces per unit area measured divided by the number of force per unit area measurements taken.

(1) Note.The signal indicative of the pressure within the combustion chamber may be treated to remove noise or distortion.