A metering pump system includes a variable displacement pump having an inlet and an outlet, a flow sensing valve fluidically connected to the outlet of the variable displacement pump, and an actuator mechanically coupled to a displacement mechanism of the variable displacement pump. The metering pump system also includes an electronic engine controller in communication with the flow sensing valve. An electrohydraulic servo valve is electrically connected to the electronic engine controller and hydraulically connected to the actuator. The electrohydraulic servo valve is configured to hydraulically drive the actuator to move the displacement mechanism to change displacement of the variable displacement pump.

A pumping system includes a first variable displacement pump having a first inlet and a first outlet. The first outlet is fluidically connected to a system outlet. A first actuator is mechanically coupled to a first displacement mechanism of the first variable displacement pump A second variable displacement pump includes a second inlet and a second outlet. The second outlet is fluidically connected to the system outlet. The pumping system also includes a second actuator mechanically coupled to a second displacement mechanism of the second variable displacement pump. An electrohydraulic servo valve is hydraulically connected to the first and second actuators. An electronic engine controller is in communication with the electrohydraulic servo valve and is configured to send electrical current to the electrohydraulic servo valve to drive the first actuator and the second actuator.

A pumping system includes a first variable displacement pump having a first inlet and a first outlet. The first outlet is fluidically connected to a system outlet. A first actuator is mechanically coupled to a first displacement mechanism of the first variable displacement pump A second variable displacement pump includes a second inlet and a second outlet. The second outlet is fluidically connected to the system outlet. The pumping system also includes a second actuator mechanically coupled to a second displacement mechanism of the second variable displacement pump. An electrohydraulic servo valve is hydraulically connected to the first and second actuators. An electronic engine controller is in communication with the electrohydraulic servo valve and is configured to send electrical current to the electrohydraulic servo valve to drive the first actuator and the second actuator.

An oil dispersion system uses an actuator for propellers and includes a pumping device that circulates oil when a driving motor is operated to drive a propeller, whereby the propeller and an oil circulation structure are integrated, and a circulation amount of oil is adjusted based on an angle of a swash plate of the pumping device when the driving motor is operated in order to drive the propeller, thereby controlling a supply of oil to no more than that required by oil-using parts.

An oil dispersion system uses an actuator for propellers and includes a pumping device that circulates oil when a driving motor is operated to drive a propeller, whereby the propeller and an oil circulation structure are integrated, and a circulation amount of oil is adjusted based on an angle of a swash plate of the pumping device when the driving motor is operated in order to drive the propeller, thereby controlling a supply of oil to no more than that required by oil-using parts.

The present disclosure discloses a swashplate-type axial plunger pump with multi-channel oil feed and full-flow self-cooling and double-end-face flow distribution. The cooling oil suctioned by the plunger pump firstly cools the friction pair of the cylinder block and the plunger; then, one part of the cooling oil passes through a gap between the pump case and the cylinder block and enters the control chamber by passing by the friction pair of the oil distribution plate and the cylinder block to cool the friction pair of the oil distribution plate and the cylinder block; and the other part of the cooling oil passes through a gap between the pump case and the cylinder block and enters the control chamber by passing by the friction pair of the slipper and the swashplate to cool the friction pair of the slipper and the swashplate.

The present disclosure discloses a swashplate-type axial plunger pump with multi-channel oil feed and full-flow self-cooling and double-end-face flow distribution. The cooling oil suctioned by the plunger pump firstly cools the friction pair of the cylinder block and the plunger; then, one part of the cooling oil passes through a gap between the pump case and the cylinder block and enters the control chamber by passing by the friction pair of the oil distribution plate and the cylinder block to cool the friction pair of the oil distribution plate and the cylinder block; and the other part of the cooling oil passes through a gap between the pump case and the cylinder block and enters the control chamber by passing by the friction pair of the slipper and the swashplate to cool the friction pair of the slipper and the swashplate.

A coolant pump for an internal combustion engine (ICE) in a vehicle with a central engine control, having a pump shaft that drives an impeller for pumping a coolant. An axial piston pump operated via a wobble plate on a rear face of the impeller, conducts part of the pumped coolant away to a hydraulic circuit that extends from the axial piston pump via a proportional valve back to the pumped coolant and has a branch-off between the axial piston pump and the proportional valve as the hydraulic actuator. A regulating slide valve adjusts coolant volume flow of depending on pressure in the hydraulic circuit. A sensor detects a parameter characteristic of the coolant volume flow and outputs an actual value signal. A dedicated pump control controls the proportional valve based on the actual value signal of the sensor and a desired value signal of the central engine control.

The invention relates to a piston type axial expander (4) comprising: an intake cylinder head (10) for vapor under pressure comprising a vapor intake opening (100), an expansion zone comprising a plurality of cylinders (110), wherein a piston (111) sliding in each respective cylinder is connected to a shaft (40) by an inclined plate (20), each piston being parallel to said shaft. a plurality of poppet valves (12) arranged orthogonally to the shaft (40) in the intake cylinder head (10) allowing alternating intake of vapor into said cylinders (110), each valve (12) being controlled by a cam (21) arranged on the shaft (40), a lift mechanism (13) for each valve cooperating with the cam, a return mechanism for each valve.

The intake cylinder head (10) comprises: an enclosed and lubricated central zone (10A) comprising the cam and the lift and return mechanisms of the valves, a peripheral zone (10B) in which the intake opening (100) leads, extending around the central zone (10A).

In an embodiment, a variable flow pump may include a swashplate rotatably driven by a driveshaft. The swashplate may be movable between a first and second tilt angle relative to the driveshaft. A piston pump may be reciprocatingly driven by the swashplate based upon, at least in part, the tilt angle of the swashplate. An actuator piston may be moveable between a first and second position based upon, at least in part, a downstream backpressure of a fluid pumped by the piston pump. An actuator assembly may be moveable between a first and second position based upon, at least in part, the position of the actuator piston. The actuator assembly may include a swashplate driver configured urge the swashplate between the first and second tilt angles, and a biasing driver configured to apply a force urging the swashplate into contact with the swashplate driver.