US PATENT SUBCLASS 477 / 130
.~.~.~.~ Plural shift valves


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}
127  DF  .~.~.~ Shift valve control {5}
130.~.~.~.~ Plural shift valves {3}
131  DF  .~.~.~.~.~> Electric control {2}
135  DF  .~.~.~.~.~> Downshift control {1}
137  DF  .~.~.~.~.~> Selector valve overrule


DEFINITION

Classification: 477/130

Plural shift valves:

(under subclass 127) Subject matter wherein two valves are regulated by signals responsive to input manifold pressure or engine* fuel control to trigger actuation of two speed ratio* changes.