US PATENT SUBCLASS 123 / 320
.~ Responsive to deceleration mode (e.g., engine acting as a brake)

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

319  DF  ENGINE SPEED REGULATOR {16}
320.~ Responsive to deceleration mode (e.g., engine acting as a brake) {7}
321  DF  .~.~> Valve timing altering means (e.g., axially sliding cam shaft) {1}
323  DF  .~.~> Exhaust throttling or blocking
324  DF  .~.~> Part of the air or combustible mixture to the engine cylinder omitted
325  DF  .~.~> Deceleration responsive cutoff of fuel to engine (e.g., pollution control) {1}
327  DF  .~.~> Auxiliary air fed to the engine
328  DF  .~.~> Idle jet bypassed by a slight opening of the throttle
329  DF  .~.~> Having means to retard spark (e.g., ignition timing)

DEFINITION

Classification: 123/320

Responsive to deceleration mode (e.g., engine acting as a brake):

(under subclass 319) Subject matter wherein the speed regulator senses high manifold vacuum, closed throttle, and rpm above idle and responds to cause or attempt to cause a further reduction in engine rpm.

(1) Note. In many instances, the speed regulator includes means to reduce pollutants in the exhaust gas causes by the deceleration condition.