US PATENT SUBCLASS 123 / 442
.~ Injection or carburetion system having a series of throttle valves

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

434  DF  CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29}
442.~ Injection or carburetion system having a series of throttle valves

DEFINITION

Classification: 123/442

Injection or carburetion system having a series of throttle valves:

(under subclass 434) Subject matter in which the charge-forming device has more than one throttle valve in series flow relation in the engine intake.