US PATENT SUBCLASS 477 / 161
.~.~.~.~.~.~.~ Duty ratio control

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
156  DF  .~.~.~ Transmission pressure controlled {3}
158  DF  .~.~.~.~ Line pressure controlled {3}
159  DF  .~.~.~.~.~ Responsive to speed {1}
160  DF  .~.~.~.~.~.~ Electric valve control {1}
161.~.~.~.~.~.~.~ Duty ratio control

DEFINITION

Classification: 477/161

Duty ratio control:

(under subclass 160) Subject matter wherein the electric signal is variable and effective to variably regulate a fluid pressure by pulse width modulation of on-off signals to the valve.