Hydrostatic test stand
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United States of America Patent
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Apr 14, 1992
Grant Date -
N/A
app pub date -
Nov 28, 1990
filing date -
Nov 28, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A test stand for testing hydrostatic drive units which have a variable displacement hydraulic pump in a closed fluid circuit with a hydraulic motor and are characterized by a motor output speed and a system fluid pressure. The test stand includes a power source for energizing a hydrostatic drive unit, a speed control for controlling the level of motor output speed, a pressure control for controlling the level of system fluid pressure, sensors for detecting the instantaneous level of motor output speed and system fluid pressure, and logic circuits for providing a command signal responsive to the sensed instantaneous levels to the speed control and the pressure control.
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