Abstract: A fuel supply device includes a filter device, a pump, a suction pipe, and a bubble removing device. The filter device includes a first filter that filters a fuel, a filter chamber surrounded by the first filter, and a filter opening that is in fluid communication with the filter chamber. The pump has a pump suction port for drawing the fuel from the filter chamber. The suction pipe fluidly connects the filter opening to the pump suction port. The bubble removing device is disposed in at least one of the filter device and the suction pipe. The bubble removing device includes a valve device that is configured to discharge a bubble contained in the fuel to the internal space of the fuel tank, and a foreign matter regulator that is disposed between the valve device and the internal space and that regulates or prevents a foreign matter contained in the fuel from flowing into the fuel supply device.

Abstract: A fuel supply device includes a filter device, a pump, a suction pipe, and a babble removing device. The filter device includes a first filter that filters a fuel, a filter chamber surrounded by the first filter, and a filter opening that is in fluid communication with the filter chamber. The pump has a pump suction port for drawing the fuel from the filter chamber. The suction pipe fluidly connects the filter opening to the pump suction port. The babble removing device is disposed in at least one of the filter device and the suction pipe. The bubble removing device includes a valve device that is configured to discharge a bubble contained in the fuel to the internal space of the fuel tank, and a foreign matter regulator that is disposed between the valve device and the internal space and that regulates or prevents a foreign matter contained in the fuel from flowing into the fuel supply device.

Abstract: A suction filter has a filter member including multiple filter layers stacked in a thickness direction. The suction filter removes extraneous matters contained in fuel when the fuel passes through the filter member in the thickness direction. The filter member has gaps among the filter layers adjacent to each other in the thickness direction. An opening area variable section is formed in at least one of the filter layers. The opening area variable section enlarges and opens when the filter layer bends. The opening area variable section enlarges and opens to form a through hole penetrating through the filter layer if the filter layer bends to a downstream filter layer side due to flow pressure caused when the fuel flows.

Abstract: A filter device is connected to a fuel pump for supplying filtered fuel to an internal combustion engine. The filter device has a bag-shaped filter element forming therein a fuel passage, wherein fuel passes through the filter element to enter into the fuel passage. The filter element further forms a vapor pooling chamber above the fuel passage, so that vapors separated from the filtered fuel in the fuel passage are moved toward the vapor pooling chamber. A valve device is provided at a portion of the filter device, which is close to the vapor pooling chamber, so that vapors are discharged from the vapor pooling chamber to an outside of the filter device.

Abstract: A fuel supply system includes a fuel pump, a filter element, a pressure regulating valve, and a filter case. The filter case is configured to cover radially inner and outer surfaces of the filter element. The filter case has a receiving portion. A bottom portion of the receiving portion and an end portion of the filter element defines therebetween an outflow chamber for storing fuel. The outflow chamber includes a partitioning member that partitions the outflow chamber into first and second outflow chamber sections. The second outflow chamber section is communicated with an inlet portion of the pressure regulating valve. The partitioning member has a communication portion that provides communication between the first and second outflow chamber sections.

Abstract: A fuel supply device includes a subtank in a fuel tank, a fuel pump in the subtank having a first pump unit suctioning fuel in the subtank to supply fuel to an external equipment and a second pump unit suctioning fuel outside the subtank to pump fuel into the subtank, and a filter connected to a first suction port of the first unit and a second suction port of the second unit and filtering supply fuel supplied to the equipment and pump fuel pumped into the subtank. The filter includes a case, a first filter, and a second filter. The first filter in a first passage of the case directing fuel in the subtank into the first port filters the supply fuel. The second filter in a second passage of the case directing fuel outside the subtank into the second port filters the pump fuel.

Abstract: A fuel supply system includes a fuel pump, a filter element, a pressure regulating valve, and a filter case. The filter case is configured to cover radially inner and outer surfaces of the filter element. The filter case has a receiving portion. A bottom portion of the receiving portion and an end portion of the filter element defines therebetween an outflow chamber for storing fuel. The outflow chamber includes a partitioning member that partitions the outflow chamber into first and second outflow chamber sections. The second outflow chamber section is communicated with an inlet portion of the pressure regulating valve. The partitioning member has a communication portion that provides communication between the first and second outflow chamber sections.

Abstract: A fuel supply device includes a subtank in a fuel tank, a fuel pump in the subtank having a first pump unit suctioning fuel in the subtank to supply fuel to an external equipment and a second pump unit suctioning fuel outside the subtank to pump fuel into the subtank, and a filter connected to a first suction port of the first unit and a second suction port of the second unit and filtering supply fuel supplied to the equipment and pump fuel pumped into the subtank. The filter includes a case, a first filter, and a second filter. The first filter in a first passage of the case directing fuel in the subtank into the first port filters the supply fuel. The second filter in a second passage of the case directing fuel outside the subtank into the second port filters the pump fuel.

Abstract: A fuel supply system supplies fuel in a fuel tank to a fuel consumption apparatus. The system includes a subtank, a pump unit, and an urging device. The subtank is received in the fuel tank and has a communicating hole at a bottom of the subtank. Part of fuel, which is stored in the fuel tank, is stored in the subtank. The outside and inside of the subtank communicate through the hole. The pump unit is received in the subtank and has a supply pump part, which supplies fuel in the subtank to the apparatus, and a pumping part, which pumps up fuel outside the subtank into the subtank. The pumping part has a suction part, which suctions fuel outside the subtank through the hole. The urging device urges the pump unit directly or indirectly toward the bottom of the subtank.

Abstract: A high pressure fuel supply pump which is driven by a cam connected to an engine is composed of a cylinder, a plunger slidably disposed in the cylinder, a tappet linked to the cam, a coil spring biasing the tappet against the cam, a cylindrical guide for the tappet, a plate member in abutment with head portion of the plunger, and a plurality of balls disposed between the plate member and the tappet to be slidable in directions perpendicular to the reciprocating motion of the plunger. Each of the balls shares the stress applied from the tappet.