公开(公告)号：US20070209982A1

公开(公告)日：2007-09-13

申请号：US11369352

申请日：2006-03-07

申请人： Dwayne Nystrom ,  David Sigl ,  Brian Durbin ,  Scott Davison ,  Reno Rodeghiero

发明人： Dwayne Nystrom ,  David Sigl ,  Brian Durbin ,  Scott Davison ,  Reno Rodeghiero

IPC分类号： B01D35/14

CPC分类号： F15B21/041 ,  F15B2211/20584 ,  F15B2211/50518 ,  F15B2211/50545 ,  F15B2211/611 ,  F15B2211/615

摘要： A vehicle hydraulic system which has a component lube circuit, a pump supplying hydraulic fluid from a sump to a first and a second hydraulic control circuit includes a filter circuit. The filter circuit includes a first filter circuit outlet connected to a inlet of the lube circuit, a sump line connected to the sump, and a second filter circuit outlet connected to an inlet of the pump. A suction filter or screen is connected between the sump line and the second filter circuit outlet. A suction bypass filter or screen is connected in series with a suction bypass valve between the sump line and the second filter circuit outlet. A return filter or screen is connected to an outlet of the first control circuit. A return line is connected between the return filter and the first filter circuit outlet. A return bypass filter or screen is connected in series with a return bypass valve between an outlet of the first control circuit and the return line. A pressure responsive backpressure valve has an outlet connected to the second filter circuit outlet, and has an inlet and a pressure sensing pilot line both connected to an outlet of the return filter. The backpressure valve also has a valve member biased by a spring to a normally closed position and movable to an open position in response to pressure in the pilot line. An orifice is located in the return line. A pressure sense line has one end connected to the return line between the orifice and the first filter circuit outlet, and has a second end connected to the valve member in opposition to the pilot line.

摘要翻译： 具有部件润滑回路的车辆液压系统，从油底壳向第一和第二液压控制回路供给液压流体的泵包括过滤器回路。 该滤波器电路包括连接到润滑回路的入口的第一过滤器回路出口，连接到贮槽的贮槽管线和连接到泵的入口的第二过滤器回路出口。 抽吸过滤器或筛网连接在集水管线和第二过滤器回路出口之间。 抽吸旁路过滤器或筛网与集水管线和第二过滤器回路出口之间的吸入旁通阀串联连接。 返回滤波器或屏幕连接到第一控制电路的出口。 返回线路连接在返回滤波器和第一滤波器电路插座之间。 返回旁路过滤器或筛网与第一控制回路的出口与返回管路之间的回流旁通阀串联连接。 压力响应背压阀具有连接到第二过滤器回路出口的出口，并且具有连接到返回过滤器的出口的入口和压力感测引导管线。 背压阀还具有由弹簧偏压到常闭位置的阀构件，并响应于先导管线中的压力而可移动到打开位置。 孔口位于返回管路中。 压力感测线的一端连接到孔口和第一过滤器回路出口之间的返回管线，并且具有与引导管线相对的阀构件连接的第二端。