10 results about "Hydraulic fluid" patented technology

A control system and method for detecting a hydraulic system leak in an engine includes a pressure sensor that senses a first pressure reading of a hydraulic fluid supply at a first time and a second pressure reading of said hydraulic fluid supply at a second time. A comparison module calculates a pressure ratio based on the first and second pressure readings and signals a fault condition based on a relationship between the pressure ratio and a pressure threshold.

The invention relates to a heat radiation member and a cabinet to be installed outdoors in a hermetic state, having a heat radiation function for heat radiation of devices contained therein. The object of the invention is to facilitate maintenance, downsize the cabinet, and prevent occurrence of noise. It includes: a cabinet body containing a heat source; a cover member attached to an aperture of the cabinet and having a guide portion guiding, to an exterior of the cabinet, a heat transfer member for transferring therethrough heat from the heat source by use of a hydraulic fluid; and a heat radiation part being a thermal conductor and in contact with the heat transfer member on a face and covering the heat transfer member from the exterior of the cabinet and having a heat radiation member on a face opposite to the face in contact with the heat transfer member.

The gas exchange valve arrangement for a piston engine (1) comprises a fluid chamber (52), into which chamber (52) hydraulic fluid can be introduced during cam-controlled opening of a gas exchange valve (3). A control valve (10) is used for restricting outflow from the fluid chamber (52) for delaying or slowing down the closing movement of the gas exchange valve (3). The control valve (10) comprises a valve member (13) having at least a first position, in which position maximum flow through the control valve (10) is allowed, a second position, in which position the flow through the control valve (10) is throttled, and a third position, in which position flow through the control valve (10) is prevented.

A control system for a work implement of a machine having a frame is provided. The control system includes a pair of lift cylinders operatively coupled to the work implement and configured to raise or lower the work implement with respect to the frame. Each of the lift cylinders has a rod end and a cap end. The control system includes a first cross-over line configured to fluidly communicate the rod ends to each other and a second cross-over line configured to fluidly communicate the cap ends to each other. The control system includes a cross-over valve disposed in one of the first and second cross-over lines and configured to regulate a flow of hydraulic fluid therethrough. The control system further includes a controller communicably coupled to the cross-over valve and configured to at least partially close the cross-over valve during a dump cycle of the work implement.

The invention relates to a rotary or pivoting device (10) comprising a housing (12), at least one working piston (14) that is located in the housing and can be impinged by hydraulic fluid and a pivoting part (20), which is rotatably driven by the working piston via a rotary coupling (18) and is rotatably mounted in the housing. According to the invention, the working piston is displaceably mounted in at least one cylindrical tube (22).

An opposed-piston engine includes a backlash reducing gear with at least a first and second gear that move relative to each other because of a hydraulic pressure applied within the gear. A backlash control system that includes the backlash reducing gear can dynamically adjust backlash between at least two gears in the gear train of the engine during operation of the engine instead of setting backlash prior to operation of the engine. A method for adjusting backlash in a two-stroke-cycle, opposed-piston engine with a backlash reducing gear includes providing hydraulic fluid, such as oil, to thegear, and allowing the backlash reducing gear to adapt to changes in the engine that include temperature changes, torque reversals, changes in load and the like. The backlash reducing gear adapts tochanges in the engine by controlled leaking and intake of oil.

The invention is directed to a tensioner assembly for providing tensile force from a floating vessel at the surface of the ocean to the blowout preventer stack, or production tree, which is connected to the wellhead at the sea floor. The tensioner assembly compensates for vessel motion induced by wave action and heave and maintains a variable tension to the riser string alleviating the potential for compression and thus buckling or failure of the riser string. The tensioner assembly of the present invention includes a cylinder, a stop tube disposed with the cylinder, and a ram slidably engaged within the stop tube. The tensioner assembly also includes at least one gas, or air, transfer tube to create a pressurized air over hydraulic fluid arrangement to provide tensile force to the tensioner assembly.