Vehicle speed control
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United States of America Patent
Stats
-
Feb 28, 1984
Grant Date -
N/A
app pub date -
Mar 18, 1981
filing date -
Mar 19, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for controlling speed of a vehicle having a retarder includes a receiver (1) for receiving signals from a transmitter (2) indicative of a reference speed and a processor (26) for comparing actual speed of the vehicle with the reference speed and for generating output signals if the actual speed is in excess of the reference speed, the output signals controlling valves (13, 14 and 15) of an air supply system (12) to the retarder and being arranged to operate sequentially to control progressively magnitude of power supplied to the retarder if the vehicle speed is not reduced during sequential periods of predetermined duration.
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