US PATENT SUBCLASS 123 / 402
.~ Charge volume varying (e.g., total amount of mixture fed to engine is varied; relative amounts of air and fuel are fixed)

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

319  DF  ENGINE SPEED REGULATOR {16}
402.~ Charge volume varying (e.g., total amount of mixture fed to engine is varied; relative amounts of air and fuel are fixed) {3}
403  DF  .~.~> Throttling (e.g., volume varying using throttle valve)
404  DF  .~.~> Suction operated supply valve lift regulating
405  DF  .~.~> By engine operated valve

DEFINITION

Classification: 123/402

Charge volume varying (e.g., total amount of mixture fed to engine is varied; relative amounts of air and fuel are fixed):

(under subclass 319) Subject matter for regulating the speed of an internal combustion engine by varying the volume at constant pressure of successive charge of air-fuel mixture fed to the working cylinder.

(1) Note. The relative amount of air and fuel is fixed.