US PATENT SUBCLASS 123 / 403
.~.~ Throttling (e.g., volume varying using throttle valve)

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

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

DEFINITION

Classification: 123/403

Throttling (e.g., volume varying using throttle valve):

(under subclass 402) Subject matter in which the flow of fuel, oxidant, or combustible mixture to the engine or mixing chamber is controlled by varying the cross-sectional area of the mixture conduit or of the conduits of the components of the mixture, thereby varying the volume of charge for induction into the engine cylinder.