| 摘要 |
<p>LOAD SENSING STEERING Fluid in the relatively long lines between a control valve and a fluid actuator can become overly viscous in cold weather. Fluid is circulated through such lines, at least during cold weather, even when the fluid actuator is not being used. This flowing is discontinued in response to shifting of the control valve to a position where it motivates the actuator and in response to pressure in the circulating path exceeding a selected level.</p> |
