Abstract: A diaphragm valve having a first chamber and a second chamber, which is separated from the first chamber by means of a valve member which cooperates with a valve seat. A first connecting conduit situated in the vicinity of the valve seat feeds into the first chamber. To enable the diaphragm valve to be used as a pressure control valve, the valve member has a through conduit that connects the first connecting conduit to the second chamber of the pressure control valve when the pressure control valve is closed.

Abstract: A fuel supply system for supplying an internal combustion engine with fuel comprises an electric fuel pump arranged with a fuel tank. A fuel line leading to the internal combustion engine is connected with the fuel pump. A return line returning fuel toward the fuel pump is connected with the fuel line. Further, a shunt is connected with the fuel line via which a sucking jet pump arranged in the fuel tank is operated. The fuel supply system comprises a pressure control system that opens or closes the connection of the shunt to the fuel line at a first pressure and opens or closes the connection of the return line with the fuel line at a second pressure. When the pressure increases, the shunt and the return line are opened by the pressure control system, and when the pressure drops, they are closed.

Abstract: A servo valve for actuating a pressure booster of a fuel injector, the pressure booster having a work chamber separated by a booster piston from a differential pressure chamber and the pressure change in the differential pressure chamber of the pressure booster is effected via the servo valve, via switching valve. The control chamber of the servo valve can both be made to communicate with a high-pressure source and pressure-relieved into a low-pressure-side return, and for generating a fast closing motion at the valve piston, a pressure shoulder acting in the closing direction of the valve piston is embodied between the control chamber and the hydraulic chamber, and control edges without a common opening phase are embodied on the valve piston.

Abstract: A return-flow-free fuel supply system for an internal combustion engine having at least one fuel pump for pumping fuel from a first region of a fuel reservoir into a pressure region communicating with a fuel distributor, at least one suction jet pump, through which fuel pumped through a suction jet pump line by means of the fuel pump flows and through which fuel can be pumped from a second region of the fuel reservoir into the first region, at least one means that regulate and/or control the pressure in the pressure region, and at least one check valve, by which at least a portion of the pressure region can be blocked off from the fuel pump. The means that regulate and/or control the pressure in the pressure region include at least one electrically actuatable magnet valve(40,44), which is disposed downstream of the check valve in the suction jet pump line.

Abstract: To decrease height of a center tank chamber of a fuel tank for a motorcycle, the tank is formed to have a center tank chamber, and one side and another side tank chambers comprising an inclined parts extending to lower sides of one side and another side from a bottom part of the center tank chamber respectively, a fuel supply unit, where a fuel pump having a fuel filter on the low pressure side is attached to a closing plate through a supporting body 2, is inserted into the fuel tank from a unit inserting hole at the bottom part, a longitudinal axial line of the fuel pump is arranged along the inclined part, and a pump suction passage is provided in the one side tank chamber positioned lower than the bottom part.

Abstract: A fuel injection device has an injection valve, a line that supplies highly pressurized fuel to the injection valve during operation, a control valve that controls the pressure in a control chamber of the injection valve, which chamber is connected to the line, and whose moving valve element is actuatable by an actuator via a hydraulic coupler having two pistons cooperating with a coupler volume of the coupler, the seat of the moving valve element having an inner cross-sectional surface area f3 and a conduit for filling the coupler volume with pressurized fuel via guidance gaps of the pistons.

Abstract: The invention relates to a combination valve (15) for pressure control and venting in a fuel system for delivering fuel to an internal combustion engine. The valve comprises a primary valve cone (25), which is supported so that it is displaceable between two limit positions in a cylinder bore (24) in a valve housing (23), against the action of a first spring element (26). The displacement of the valve cone from an inoperative limit position into an operative limit position leads to the opening of a connection between an inlet duct (32) and an outlet duct (33) in the valve housing. The valve cone (25) is provided with an inner passage (27), which is designed to accommodate a secondary valve cone (28). This is displaceable between a support surface (29) and a valve seat (30) against the action of a second spring element (31) having a lower spring constant than the first spring element.

Abstract: In a method for the pressure regulation in a common rail fuel injection system of an internal combustion engine wherein pressurized fuel is supplied to the various combustion chambers of the engine via injectors under the control of an electronic control unit, a first actual control pressure is determined from a measured rail pressure and compared with a desired rail pressure in order to form a first control deviation, whereupon a volume flow depending on the first control deviation is determined and, from the measured rail pressure, a second actual rail pressure is determined using overridingly the second actual rail pressure for the calculation of the controller parts of the high pressure controller.

Abstract: A fuel injection system for internal combustion engines having a plurality of fuel injectors, in which the fuel injectors each have one high-pressure connection and one low-pressure connection, and the low-pressure connections discharge into at least one manifold line. The system has a means, located between the manifold line and a pressureless fuel return, for maintaining the fuel pressure; at least one throttle is located between the low-pressure connection of each fuel injector and the means for maintaining the fuel pressure.

Abstract: In collecting fuel pressure data in a common rail 2 during engine operation, the common rail fuel pressure is detected each time a crank shaft rotates 6°, and the common rail fuel pressure is stored in storage means 12 by associating the common rail fuel pressure with a cylinder number and a crank angle for tabulation, thus providing improved detection data accuracy.

Abstract: An internal combustion engine (14) has an associated controller (18) controlling operation of the engine. A fuel pump (10) delivers fuel to the engine at more than one pressure (300 kPa, 800 kPa). The fuel pump includes a fuel inlet (34) and a fuel outlet (68). It also includes a motor (38) and pump assembly (36) for drawing fuel through the inlet into the fuel pump and delivering fuel to the outlet at a pressure higher than the pressure at the inlet. An outlet assembly (40) of the pump includes an outlet pressure sensor (76) and a processor (79) which is responsive to an input from the controller to vary the outlet fuel pressure by controlling the speed of the motor.

Abstract: The high-pressure pump (7) comprises a number of pumping elements (18) actuated in reciprocating motion through corresponding suction and delivery strokes. Each pumping element (18) is provided with a corresponding intake valve (25) in communication with an intake pipe (10) supplied by a low-pressure pump (9). Set on the intake pipe (10) is an on-off solenoid valve (27) having a reduced flow rate substantially of the same order of magnitude as the maximum amount of fuel that can be injected by an injector (5). The solenoid valve (27) is controlled in a chopped way in synchronism with an intermediate part (32) of the suction stroke of each pumping element (18).

Abstract: The invention relates to a method and a control system for driving an electric motor (4) coupled with a crankshaft (2) of an internal combustion engine, in order to position the crankshaft (2) at a starting angle, wherein the control system comprises: a detection device (7) for receiving and/or determining a position angle and/or the rotational speed of the crankshaft (2), and a control unit (5) which is capable of driving the electric motor (4) in a closed loop control mode dependent on the rotational speed of the crankshaft and of positioning the crankshaft (2) at said starting angle after the internal combustion engine (1) is stopped, so that, in the case of a subsequent start, the internal combustion engine (1) is started from this starting angle, wherein the control unit (5) is designed so as to drive the electric motor (4) according to an open loop control mode, below a prespecified rotational speed limit independently of the rotational speed in an open loop control, so that the crankshaft (2) is set to

Abstract: A system for processing fuel vapor includes a fuel tank having a pressure gauge, a gas separation membrane module having a gas separation membrane for separating fuel vapor into condensed fuel vapor and fuel lean vapor, a fuel-vapor dissolution device for introducing condensed fuel vapor discharged into the fuel tank and dissolving this condensed fuel vapor in fuel, a canister having an adsorption part adsorbing fuel vapor in fuel lean vapor and a desorption device desorbing fuel vapor from the adsorption part, and an ECU programmed to, when the internal pressure of the fuel tank detected by the pressure gauge is at least a predetermined value, drive the pump to actuate the system so as to process fuel vapor.

Abstract: A fuel injection rail has a rail body formed by joining together a first body member having the shape of a trough and a second body member having the shape of a flat plate. Edges of the side walls of the first and the second body members are joined in folded seams by folding the edges of the first body member so as to crimp the edges of the second body member, and the folded seams are brazed.

Abstract: The disclosed multi-cylinder, poppet-valved engine, has replacement cylinder sleeves larger than the original sleeves, and laterally supported near their upper ends by an aluminum alloy plate having a continuous flange or boss projecting into the cylinder block. The flange has an inner perimeter surface having a profile fittingly engaging upper exterior cylindrical surfaces of the sleeves providing lateral support to the sleeves and heat transfer from the sleeves to coolant and to the block. The flange further provides a coolant groove that circulates coolant around the perimeter of the cylinder sleeves to further the heat transfer from the sleeves to the coolant and to the block. The plate is sealed to the block and head with a spacing and gasketing to accommodate thermal expansion while avoiding combustion gas leakage at the cylinder sleeve tops.

Abstract: An energy-storing starting device for an internal combustion engine includes a starter pulley and a starter spring. A spring housing at least partially houses the starter spring. A toothed housing includes a plurality of ratchet teeth. A pawl member is adapted to provide a locking engagement with at least one of the ratchet teeth of the toothed housing to thereby prevent rotation of the toothed housing in an engine starting direction. An actuator is adapted to disengage the pawl member from the toothed housing to thereby permit the toothed housing to rotate. In one example, the starting device includes engagement structure adapted to bias a portion of the pawl towards at least one of the ratchet teeth of the toothed housing automatically when the starter pulley is rotated. In addition or alternatively, the toothed housing includes an interior area that at least partially receives the spring housing.

Abstract: The invention concerns a motor vehicle fuel tank (1) comprising a fuel reserve chamber (4) further comprising a suction device supplied with fuel coming directly from a fuel filter and adapted to suck up fuel in at least a low suction point outside the chamber (4), and in delivering it into the chamber (4) at least in a high delivery point, located above the desired minimum level of fuel in the tank (4) and higher than the low suction point.

Abstract: An apparatus produces a diesel-oil/water microemulsion and injects the emulsion into a diesel engine. The apparatus has three high pressure cylinders, inlets of two of the high pressure cylinders are connected to a static raw emulsion premixer. Outlets of the two high pressure cylinders are connected to a homogenizing valve. An inlet of the third high pressure cylinder is connected to the outlet of the homogenizing valve and the outlet of the third high pressure cylinder is connected to the diesel engine. The three pistons of the three high pressure cylinders are constituent parts of a pressure booster whose drive piston is guided in a drive cylinder which is connected to a hydraulic drive unit.

Abstract: The disclosed multi-cylinder, poppet-valved engine, has replacement cylinder sleeves larger than the original sleeves, and laterally supported near their upper ends by an aluminum alloy plate having a continuous flange or boss projecting into the cylinder block. The flange has an inner perimeter surface having a profile fittingly engaging upper exterior cylindrical surfaces of the sleeves providing lateral support to the sleeves and heat transfer from the sleeves to coolant and to the block.