Fuel pump for a liquid fuel injection system of a motor vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsStephan Revidat, Johannes Ullrich
Life of this patent
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Abstract
A fuel pump for a liquid fuel injection system of a motor vehicle is provided. The fuel pump for a fuel injection system includes a low-pressure pump that provides liquid fuel from a fuel tank of the motor vehicle at a low pressure. A high-pressure pump in fluid communication with the low-pressure pump and compresses the liquid fuel from the low pressure to a high pressure for injecting the liquid fuel into an internal combustion engine of the motor vehicle. A pump drive drives the low-pressure pump and the high-pressure pump synchronously with a pump frequency independently from an engine speed of the internal combustion engine of the motor vehicle.
Claims12
A pump for a liquid fuel injection system of a motor vehicle, comprising:
- a low-pressure pump configured to provide liquid fuel from a fuel tank of the motor vehicle at a low pressure;
- a high-pressure pump in fluid communication with the low-pressure pump and configured to compress the liquid fuel from the low pressure to a high pressure for injecting the liquid fuel into an internal combustion engine of the motor vehicle;
- and
- a pump drive configured to drive the low-pressure pump and the high-pressure pump synchronously with a pump frequency independently from an engine speed of the internal combustion engine of the motor vehicle,
- wherein the pump drive is configured as an electric motor,
- wherein the pump drive includes at least two electric submachines axially coupled to each other between the low-pressure pump and the high-pressure pump, and
- wherein each electric submachine includes a helical cooling channel configured to flush the liquid fuel from a low-pressure side to a high-pressure side along a helical path around an axial direction of the respective electric submachine.
Dependencies are inferred from the claim text.