US PATENT SUBCLASS 477 / 151
.~.~.~.~.~ Engine parameter controls back pressure

Current as of: June, 1999
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477 /   HD   INTERRELATED POWER DELIVERY CONTROLS, INCLUDING ENGINE CONTROL

34  DF  TRANSMISSION CONTROL {15}
115  DF  .~ Transmission controlled by engine {4}
121  DF  .~.~ By input manifold pressure or engine fuel control {6}
143  DF  .~.~.~ Servo motor timing {5}
150  DF  .~.~.~.~ With fluid accumulator {2}
151.~.~.~.~.~ Engine parameter controls back pressure

DEFINITION

Classification: 477/151

Engine parameter controls back pressure:

(under subclass 150) Subject matter wherein a movable piston functions to vary the capacity of the accumulator space, and a signal representing input manifold pressure or engine* fuel control biases the piston to change the resistance to movement of the piston.