Fluid motor control system providing speed change by combination of displacement and flow control
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United States of America Patent
Stats
-
Oct 19, 1982
Grant Date -
N/A
app pub date -
Nov 1, 1979
filing date -
Nov 1, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fluid motor control system (11) assures that automatic changes of motor displacement, which are initiated by occurrence of a predetermined operational condition in the system (11), result in a change of motor speed of the desired magnitude. Flow adjustment elements (76) respond to a displacement increase by reducing the flow of working fluid available to the motor or motors (12, 13) and respond to a motor displacement reduction by increasing the available flow. In one specific form, the system (11) controls a pair of right and left side vehicle drive motors (12, 13) and automatically increases motor displacements while reducing the fluid flow supplied to the motors (12, 13) to reduce travel speed during a turn of travel direction.
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