A fluid pump includes an inlet plate with an inlet; an outlet plate, the outlet plate having an outlet plate outlet passage; an outlet; an electric motor having a shaft which rotates; a pumping element coupled to the shaft such that rotation of the pumping element by the shaft causes fluid to be pumped from the inlet to the outlet, the inlet plate interfacing with the pumping element in an inlet sealing surface interface and the outlet plate interfacing with the pumping element in an outlet sealing surface interface; a purge passage which receives fluid from the outlet plate outlet passage, the purge passage being in fluid communication with the inlet sealing surface interface and the outlet sealing surface interface; and a filter downstream of the outlet plate outlet passage which filters fluid that passes through the purge passage prior to reaching the inlet and outlet sealing surface interfaces.

The invention relates to a rotary piston pump (16) for conveying a fluid, comprising at least two rotors (52) with conveyor elements (53), a rotational movement being implementable thereby about an rotational axis (61), a working chamber on the at least two rotors (52), a multi-part housing (42) with a first housing part (44) and a second housing part (43), at least two radial bearing shapes (37, 38) being designed on the housing (42) to act as a radial sliding bearing for the at least two rotors (52), and the at least two radial bearing shapes (37, 38) being designed on only one of said housing parts (44).

The invention relates to a rotary piston pump (16) for conveying a fluid, comprising at least two rotors (52) with conveyor elements (53), a rotational movement being implementable thereby about an rotational axis (61), a working chamber on the at least two rotors (52), a multi-part housing (42) with a first housing part (44) and a second housing part (43), at least two radial bearing shapes (37, 38) being designed on the housing (42) to act as a radial sliding bearing for the at least two rotors (52), and the at least two radial bearing shapes (37, 38) being designed on only one of said housing parts (44).

A fuel turbine and a throttle body in a fuel system for an internal combustion engine. The fuel turbine includes a fuel turbine housing. The at least one fuel turbine output port is oriented substantially parallel to the fuel turbine housing axis and coupled to the throttle body. A primary fan capable of circumferential rotation and a secondary fan adapted for opposite circumferential rotation are oriented substantially parallel to the fuel turbine housing axis such that atomized fuel enters the fuel turbine input port to be forced by the primary fan and secondary fan into a higher pressure condition before exiting the fuel turbine housing by the at least one fuel turbine output port.

A fuel turbine and a throttle body in a fuel system for an internal combustion engine. The fuel turbine includes a fuel turbine housing. The at least one fuel turbine output port is oriented substantially parallel to the fuel turbine housing axis and coupled to the throttle body. A primary fan capable of circumferential rotation and a secondary fan adapted for opposite circumferential rotation are oriented substantially parallel to the fuel turbine housing axis such that atomized fuel enters the fuel turbine input port to be forced by the primary fan and secondary fan into a higher pressure condition before exiting the fuel turbine housing by the at least one fuel turbine output port.

The problem arises of how to control a plurality of hydraulic pumps to achieve desired performance criteria, such as reduced wear and/or power consumption. The hydraulic pumps are operated in a hydraulic system for delivering hydraulic fluid to a hydraulic motor in a cryogenic pumping apparatus in an engine system fuelled with a gaseous fuel. A controller is operatively connected with the plurality of hydraulic pumps and is programmed to periodically determine a priority for each hydraulic pump as a function of predetermined criteria such as respective cumulative pumping cycles. Higher priority hydraulic pumps are operated before lower priority hydraulic pumps, that is in descending order of priority, to supply hydraulic fluid to the hydraulic motor. Hydraulic pumps are selected to operate according to the desired performance criteria.

The problem arises of how to control a plurality of hydraulic pumps to achieve desired performance criteria, such as reduced wear and/or power consumption. The hydraulic pumps are operated in a hydraulic system for delivering hydraulic fluid to a hydraulic motor in a cryogenic pumping apparatus in an engine system fuelled with a gaseous fuel. A controller is operatively connected with the plurality of hydraulic pumps and is programmed to periodically determine a priority for each hydraulic pump as a function of predetermined criteria such as respective cumulative pumping cycles. Higher priority hydraulic pumps are operated before lower priority hydraulic pumps, that is in descending order of priority, to supply hydraulic fluid to the hydraulic motor. Hydraulic pumps are selected to operate according to the desired performance criteria.

A fuel system for a hydrogen-fueled internal combustion engine vehicle. A compressor/expander is installed in fluid connection between the fuel tank and the engine's fuel delivery system. The compressor/expander operates in compressor mode when the hydrogen fuel in the fuel tank is below a pressure desired for fuel delivery. It operates in expander mode when the hydrogen fuel in the fuel tank is above the desired pressure. The compressor/expander has inlet and outlet metering valves. A controller receives fuel tank pressure and temperature measurements and calculates timing of the metering valves to maintain the desired pressure into the fuel delivery system.

A fuel system for a hydrogen-fueled internal combustion engine vehicle. A compressor/expander is installed in fluid connection between the fuel tank and the engine's fuel delivery system. The compressor/expander operates in compressor mode when the hydrogen fuel in the fuel tank is below a pressure desired for fuel delivery. It operates in expander mode when the hydrogen fuel in the fuel tank is above the desired pressure. The compressor/expander has inlet and outlet metering valves. A controller receives fuel tank pressure and temperature measurements and calculates timing of the metering valves to maintain the desired pressure into the fuel delivery system.

A fuel pump, including a driven impeller, which rotates in a pump housing and on the two sides comprises guide blades that each delimit a ring of blade chambers, and further including partial ring-shaped channels, which are arranged on both sides in the region of the guide blades in the pump housing and which form delivery chambers with the blade chambers for delivering fuel, wherein an inlet channel leads into the one delivery chamber and the other delivery chamber leads into an outlet channel, and mutually opposing blade chambers are connected to each other. The cross-sectional surface of the partial ring-shaped channel arranged on the inlet side decreases toward the end of the partial ring-shaped channel to zero. The region in which the cross-sectional surface decreases extends over an angular region of more than 45.