Abstract: The electromagnetic valve for use in a high pressure fuel supply apparatus includes an electromagnetic valve main body including a fuel passage to be connected between the high and low pressure sides of the fuel supply apparatus, a valve seat disposed in the fuel passage, a valve member disposed within the electromagnetic valve main body in such a manner that it is detached from and contacted with the valve seat to thereby open and close the fuel passage, and a solenoid coil for moving the valve member with respect to the valve seat. The electromagnetic valve is capable of maintaining the jet-out quantity of the fuel from the high pressure fuel supply apparatus at a given value.

Abstract: There is provided a high pressure fuel supply apparatus including a plunger reciprocating in a sleeve of a high pressure fuel pump so as to form a fuel pressurizing chamber between the plunger and the sleeve, a first plate having a fuel suction port for sucking fuel into the fuel pressurizing chamber and a fuel discharge port for discharging the fuel from the fuel pressurizing chamber, and a suction valve provided in the fuel suction port, the first plate, the suction valve and a flange portion of the sleeve being held between a casing and an end surface of a spring guide constituting the high pressure fuel pump.

Abstract: A high pressure fuel supply apparatus is constituted by a plunger reciprocating in a sleeve of a high pressure fuel pump so as to form a fuel pressurizing chamber between the plunger and the sleeve, a suction valve provided in a fuel suction port for sucking fuel into the fuel pressurizing chamber, and a discharge valve provided in a fuel discharge port for discharging fuel from the fuel pressurizing chamber into a high pressure fuel discharge passageway communicating with an internal combustion engine, the discharge valve reciprocating axially so as to perform an open/close operation, wherein the high pressure fuel supply apparatus further comprises a holder for regulating an axial reciprocating movement of the discharge valve in the open/close operation within a predetermined range.

Abstract: A high pressure fuel supply apparatus includes a cylinder defining a compression chamber, a piston supported for sliding movement in the cylinder, and a valve communicating with the compression chamber. The valve includes a valve seat having a valve hole formed therein and a reed movable between an open and a closed position to open and close the valve hole. The reed has a head with an outer periphery in surface contact with the valve seat when the reed is in its closed position, and a bulge surrounded by the outer periphery and extending away from the valve hole and disposed on the valve hole when the 0reed is in its closed position.

Abstract: A variable delivery fuel supply device capable of improving linearity of discharge characteristics with respect to a rotational angle of a cam and reducing abrasion of the cam.

Abstract: A variable delivery type fuel supply apparatus capable of suppressing variation of fuel pressure within a delivery pipe and hence variation of fuel quantity injected through fuel injection valves and simplifying a control method therefor. The apparatus includes an oil relief passage (6) provided between the suction port of a fuel pump (4) and a pressurizing chamber (4e) across a suction valve (4a) of the fuel pump (4), an electromagnetic valve (7) disposed in the oil relief passage (6) and opened for a predetermined time during a discharge stroke of the fuel pump (4) for thereby controlling a discharge quantity of the fuel pump (4), and a control unit (108) for controlling the timing at which the electromagnetic valve (7) is opened.

Abstract: The present invention provides a fuel supply apparatus which has solved the problem occurring after the welding of a connecting ring, by which a core of an electromagnetic valve and a housing are connected together, finishes of the deformation of the connecting ring and a crack in a welded portion. In this apparatus, the core of the electromagnetic valve and housing are welded together at a welded portion via the connecting ring having an L-shaped cross-sectional shape. A groove for at least reducing the degree of the deformation, which occurs after the welding thererof is done, of the connecting ring, preferably a groove having a projecting open surface is formed on the portion of the surface of the housing which is in the vicinity of the welded portion.

Abstract: A fuel supply apparatus capable of reducing the abrasion of a driving cam and a tappet without increasing the dimensions and weight of the apparatus. This fuel supply apparatus is provided with a tappet which has a pressure receiving surface contacting the driving cam of an engine. The tappet is provided at the part of a outer surface thereof which is in the vicinity of an outer circumference of the pressure receiving surface with a groove adapted to prevent the local concentration of stress on the tappet and having a V-shaped, semicircular or U-shaped cross section.

Abstract: A high pressure fuel supply apparatus is constituted by a plunger reciprocating in a sleeve of a high pressure fuel pump so as to form a fuel pressurizing chamber between the plunger and the sleeve, a suction valve provided in a fuel suction port for sucking fuel into the fuel pressurizing chamber, and a discharge valve provided in a fuel discharge port for discharging fuel from the fuel pressurizing chamber into a high pressure fuel discharge passageway communicating with an internal combustion engine, the discharge valve reciprocating axially so as to perform an open/close operation, wherein the high pressure fuel supply apparatus further comprises a holder for regulating an axial reciprocating movement of the discharge valve in the open/close operation within a predetermined range.

Abstract: There is provided a high pressure fuel supply apparatus including a plunger reciprocating in a sleeve of a high pressure fuel pump so as to form a fuel pressurizing chamber between the plunger and the sleeve, a first plate having a fuel suction port for sucking fuel into the fuel pressurizing chamber and a fuel discharge port for discharging the fuel from the fuel pressurizing chamber, and a suction valve provided in the fuel suction port, the first plate, the suction valve and a flange portion of the sleeve being held between a casing and an end surface of a spring guide constituting the high pressure fuel pump.

Abstract: The electromagnetic valve for use in a high pressure fuel supply apparatus includes an electromagnetic valve main body including a fuel passage to be connected between the high and low pressure sides of the fuel supply apparatus, a valve seat disposed in the fuel passage, a valve member disposed within the electromagnetic valve main body in such a manner that it is detached from and contacted with the valve seat to thereby open and close the fuel passage, and a solenoid coil for moving the valve member with respect to the valve seat. The electromagnetic valve is capable of maintaining the jet-out quantity of the fuel from the high pressure fuel supply apparatus at a given value.

Abstract: A variable delivery type fuel supply apparatus capable of suppressing variation of fuel pressure within a delivery pipe and hence variation of fuel quantity injected through fuel injection valves and simplifying a control method therefor. The apparatus includes an oil relief passage (6) provided between the suction port of a fuel pump (4) and a pressurizing chamber (4e) across a suction valve (4a) of the fuel pump (4), an electromagnetic valve (7) disposed in the oil relief passage (6) and opened for a predetermined time during a discharge stroke of the fuel pump (4) for thereby controlling a discharge quantity of the fuel pump (4), and a control unit (108) for controlling the timing at which the electromagnetic valve (7) is opened.

Abstract: A highly-reliable, low cost, easily-sealed, sealing device of simple construction is provided for the gas charge inlet of a high-pressure vessel charged with high-pressure gas. A sealing device for sealing a gas charge inlet 101a of a high-pressure vessel 101 having a high-pressure chamber 105 in which high-pressure gas is sealed is provided with a steel ball 102 pressed into a cylindrical hole 101c in the gas charge inlet 101a to form a seal, and a plug member 103 disposed in the gas charge inlet 101a on the low-pressure side of the steel ball 102, sealed by welding to the high-pressure vessel 101. A sealing device combining variously a steel ball 122, 142 inserted into the gas charge inlet 101a, and a plug member 113, 123, 133, 143 pressed, welded, or screwed into the gas charge inlet.

Abstract: A variable delivery fuel supply device capable of improving linearity of discharge characteristics with respect to a rotational angle of a cam and reducing abrasion of the cam.

Abstract: A fuel supply apparatus restrains occurrence of resonance at a connecting portion of a distal end of a low-pressure fuel intake pipe to thereby reduce surges in fuel pressure and control generation of noises.

Abstract: A high pressure fuel supply apparatus includes a cylinder defining a compression chamber, a piston supported for sliding movement in the cylinder, and a valve communicating with the compression chamber. The valve includes a valve seat having a valve hole formed therein and a reed movable between an open and a closed position to open and close the valve hole. The reed has a head with an outer periphery in surface contact with the valve seat when the reed is in its closed position, and a bulge surrounded by the outer periphery and extending away from the valve hole and disposed on the valve hole when the Oreed is in its closed position.

Abstract: In a variable delivery fuel supply device providing a stable control of fuel pressure without being influenced by a scattering of control of an electromagnetic valve and without causing an increase of temperature in the coil of the electromagnetic valve, the variable delivery fuel supply device comprises fuel injection valves 1a-1d for injecting fuel to respective cylinders of an internal combustion engine, a fuel pump 3 which sucks fuel from a fuel intake passage 25 through an intake valve 26 into a pressurizing chamber 17 by a reciprocating movement of a plunger 15 in a cylinder 14 and discharges the pressurized fuel into the delivery pipe through a discharge valve 27, an electromagnetic valve 28 which is located in a relief passage 31 communicating the pressurizing chamber 17 of the fuel pump 3 with the fuel intake passage 25 and is adapted to control a discharge quantity of fuel by relieving the pressurized fuel in the pressurizing chamber 17 at the time of opening the valve, and a control unit 13 for sup

Abstract: A high-pressure fuel supply assembly includes a first member composed stainless steel and a second member composed of plated low-carbon steel in at least one weld portion among a low-pressure damper weld portion, a high-pressure fuel pump weld portion, and a high-pressure regulator weld portion.

Abstract: A variable delivery fuel supply device comprising fuel injection valves 1a through 1d injecting a fuel to cylinders of a combustion engine, a fuel pump 3 taking the fuel in a pressurization chamber 17 from a fuel intake passage 25 through an intake valve 26, pressurizing the fuel, and discharging thus pressurized fuel from a discharge valve 27 by a reciprocal motion of a plunger 15 inside a cylinder, an electromagnetic valve 28, formed in a relief passage 31 connecting the pressurization chamber 17 of the fuel pump 3 to the fuel intake passage 25, for controlling a discharge quantity by relieving the pressurized fuel inside the pressurization chamber 17 at the time of opening the injection valves, and a control means 13 applying a valve-opening signal to the electromagnetic valve 28, wherein a width of a time of the valve-opening signal, applied to the electromagnetic valve 28 from the control means 13, is always set at a constant with respect to a period of the reciprocal movement of the plunger 15, whereby

Abstract: A high-pressure fuel supply assembly includes a high-pressure fuel pump for pressurizing fuel from a low-pressure fuel intake passage and discharging high-pressure fuel into a high-pressure fuel discharge passage, a high-pressure damper disposed in the high-pressure fuel discharge passage for absorbing surges in the high-pressure fuel, a high-pressure regulator disposed in a branch passage branching from a branch portion of the high-pressure fuel discharge passage for adjusting the high-pressure fuel from the high-pressure damper to a predetermined pressure, and an orifice disposed in the high-pressure fuel discharge passage downstream from the branch portion for absorbing surges in the high-pressure fuel.