US PATENT SUBCLASS 123 / 478
.~.~.~ Actuator circuit (e.g., engine condition responsive electronic circuit actuates injector valve)

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

434  DF  CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29}
445  DF  .~ Fuel injection system {5}
472  DF  .~.~ Electrically actuated injector {5}
478.~.~.~ Actuator circuit (e.g., engine condition responsive electronic circuit actuates injector valve) {15}
479  DF  .~.~.~.~> Backup systems, fail-safe, failure indicator
480  DF  .~.~.~.~> Having microprocessor
481  DF  .~.~.~.~> Engine cylinder cutout
482  DF  .~.~.~.~> Circuit activates valve for continuous fuel flow
483  DF  .~.~.~.~> Having plural multivibrators
484  DF  .~.~.~.~> Having single multivibrator
485  DF  .~.~.~.~> Having ramp generator
486  DF  .~.~.~.~> Having a digital memory addressed by an engine parameter
487  DF  .~.~.~.~> Having an up or up-down counter in circuit
488  DF  .~.~.~.~> Subcircuit operates on a parameter sensor output before input to main fuel control (e.g., function generator)
490  DF  .~.~.~.~> Injector solenoid drive
491  DF  .~.~.~.~> Starting condition responsive
492  DF  .~.~.~.~> Acceleration or full load condition responsive
493  DF  .~.~.~.~> Deceleration condition responsive
494  DF  .~.~.~.~> Having specific transducer

DEFINITION

Classification: 123/478

Actuator circuit (e.g., engine condition responsive electronic circuit actuates injector valve):

(under subclass 472) Subject matter wherein the said fuel injector valve is controlled by an electronic circuit having at least one engine parameter sensing means to determine the correct amount of fuel to be metered to the engine.