发明名称 |
Hydraulic system having variable back pressure control |
摘要 |
A hydraulic system for a work machine having a linkage system is disclosed. The hydraulic system has a tank configured to hold a supply of fluid and at least one hydraulic actuator associated with the linkage system to affect movement of the linkage system. The at least one hydraulic actuator has a first pressure chamber and a second pressure chamber. The hydraulic system also has an independent metering valve associated with the first pressure chamber. The independent metering valve has a valve element movable between a first position at which fluid communication between the first pressure chamber and the tank is blocked, and a second position at which fluid is allowed to drain from the first pressure chamber to the tank. The hydraulic system further has at least one sensor configured to sense a parameter indicative of a pressure in the second pressure chamber, and a controller in communication with the independent metering valve and the sensor. The controller is configured to move the valve element of the independent metering valve in response to the pressure.
|
申请公布号 |
US7210292(B2) |
申请公布日期 |
2007.05.01 |
申请号 |
US20050092617 |
申请日期 |
2005.03.30 |
申请人 |
SHIN CATERPILLAR MITSUBISHI LTD |
发明人 |
PRICE ROBERT J.;RAAB FRANCIS J. |
分类号 |
F16D31/02 |
主分类号 |
F16D31/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|