Abstract: The fuel supply apparatus for supplying fuel to an internal combustion engine has a fuel tank (2), a first fuel pump (6) that supplies fuel from the fuel tank to a fuel line (10), a second fuel pump (12) that supplies fuel from the fuel line (10) via a pressurized line to at least one fuel valve (16) and a fuel return line (22) that connects the fuel line (10) to the fuel tank for return of excess fuel. A shut off valve (30), which is closed at high temperatures, and a pressure regulator valve (26) are arranged hydraulically in series in the fuel return line (22). A fuel scavenger line (60) is provided, by which fuel at high temperatures is returned to the fuel tank (2). The fuel scavenger line (60) conducts the fuel back to the fuel tank (2), at least partially through the second fuel pump (12) and through a hydraulic resistance. Gas bubble formation is prevented by a high fuel supply pressure and by transfer of heat from the second fuel pump (12).

Abstract: A fuel injection system for direct injection of fuels into at least one combustion chamber of an internal combustion engine has at least one fuel injection valve for each combustion chamber which can be inserted at a spray section into a respective receptacle bore hole, which is designed on the cylinder head of the internal combustion engine and has a fuel inlet opening on an inlet section. This fuel injection system also has a fuel distributor line which has a fuel outlet opening for each fuel inlet opening of the fuel injection valve. A tubular transition piece is arranged between the fuel inlet opening of each fuel injection valve and the respective fuel outlet opening and can be snarlingly connected to the fuel inlet opening of the respective fuel injection valve and to the fuel outlet opening of the fuel distributor line so that it can move within predetermined limits.

Abstract: A method for cooling a fuel injection system and fuel injection systems are proposed that improve the hot-starting performance of the internal combustion engine.

Abstract: A fuel injection system for direct injection of fuels into at least one combustion chamber of an internal combustion engine has at least one fuel injection valve for each combustion chamber which can be inserted at a spray section into a respective receptacle bore hole, which is designed on the cylinder head of the internal combustion engine and has a fuel inlet opening on an inlet section. This fuel injection system also has a fuel distributor line which has a fuel outlet opening for each fuel inlet opening of the fuel injection valve. A tubular transition piece is arranged between the fuel inlet opening of each fuel injection valve and the respective fuel outlet opening and can be snarlingly connected to the fuel inlet opening of the respective fuel injection valve and to the fuel outlet opening of the fuel distributor line so that it can move within predetermined limits.

Abstract: A method for cooling a fuel injection system and fuel injection systems are proposed that improve the hot-starting performance of the internal combustion engine.

Abstract: A fuel injection system for direct injection of fuels into at least one combustion chamber of an internal combustion engine has at least one fuel injection valve for each combustion chamber which can be inserted at a spray section into a respective receptacle bore hole, which is designed on the cylinder head of the internal combustion engine and has a fuel inlet opening on an inlet section. This fuel injection system also has a fuel distributor line which has a fuel outlet opening for each fuel injection valve which can be connected to the fuel inlet opening of the fuel injection valve. A tubular transition piece is arranged between the fuel inlet opening of each fuel injection valve and the respective fuel outlet opening and can be snarlingly connected to the fuel inlet opening of the respective fuel injection valve and to the fuel outlet opening of the fuel distributor line so that it can move within predetermined limits.

Abstract: The fuel supply apparatus for supplying fuel to an internal combustion engine has a fuel tank (2), a first fuel pump (6) that supplies fuel from the fuel tank to a fuel line (10), a second fuel pump (12) that supplies fuel from the fuel line (10) via a pressurized line to at least one fuel valve (16) and a fuel return line (22) that connects the fuel line (10) to the fuel tank for return of excess fuel. A shut off valve (30), which is closed at high temperatures, and a pressure regulator valve (26) are arranged hydraulically in series in the fuel return line (22). A fuel scavenger line (60) is provided, by which fuel at high temperatures is returned to the fuel tank (2). The fuel scavenger line (60) conducts the fuel back to the fuel tank (2), at least partially through the second fuel pump (12) and through a hydraulic resistance. Gas bubble formation is prevented by a high fuel supply pressure and by transfer of heat from the second fuel pump (12).

Abstract: A fuel injection system is used for direct injection of fuel into the combustion chambers of an internal combustion engine. This fuel injection system has at least one fuel injector for each combustion chamber of the internal combustion engine which can be inserted at one spray section into a respective mounting hole provided on a cylinder head of the internal combustion engine and which has a fuel inlet orifice. In addition, there is a fuel distributor line having for each fuel injector a fuel outlet orifice connectable to the fuel inlet orifice of the fuel injector and being attachable to the cylinder head by mounting devices provided for each fuel injector. A hold-down device is provided for each fuel injector for holding down the fuel injector in the respective mounting hole of the cylinder head. Each hold-down device is connected to the respective mounting device.

Abstract: A mounting device for mounting fuel injectors, for directly injecting fuel into a combustion chamber of an internal combustion engine, and a fuel distribution line, on a cylinder head of the internal combustion engine. The mounting device includes spring elements, which extend between a spring retainer of the fuel distribution line allocated to each fuel injector, and a spring retainer of the allocated fuel injector. The mounting device further includes a mounting bracket, common to all the fuel injectors, which extends from a mounting-bracket receiver of the fuel distribution line to mounting-bracket receiver of the fuel injectors. The spring elements brace the fuel distribution line and the fuel injectors against each other in such a way that the fuel distribution line and the fuel injectors are held in force-locking contact in their allocated mounting-bracket receivers, and after compressing the spring elements, the mounting bracket can be loosened and removed.

Abstract: The invention relates to a high pressure reciprocating pump, for a fuel injection system of an internal combustion engine, having at least one piston, which is displaceably supported in a piston guide provided in a housing and therein defines a work chamber. Supported in the housing is a drive shaft, on which a crank element is provided on which a stroke ring, is not rotatable in the housing. The crank element is rotatably supported, the stroke ring has a slide bearing face, associated with the piston on which face the piston is supported with a slide face, so that the piston can be acted upon by the drive shaft. To reduce the danger of so-called seizing of the bearing faces moving back and forth on one another when poorly lubricating media such as fuel and in particular gasoline are being pumped, it is provided that a relief chamber, formed by a recess in the slide face disposed on the piston and open toward the slide bearing face on the stroke ring, communicates with the work chamber.

Abstract: A piston pump for pumping fuel in which a risk of fuel getting into the area of a shaft seal is limited. The fuel pump includes a separation chamber which is provided between a shaft seal and a fuel chamber that contains fuel. Located in the separation chamber is for instance air as a separator means, and the separation chamber communicates with an air inlet of the engine. This assures that fuel cannot get into the area of the shaft seal or escape to the outside. The fuel pump is suitable in particular for internal combustion engines in which the fuel must be delivered at high pressure.

Abstract: The device relates to a piston pump, in particular a high pressure pump for a fuel injection device of an internal combustion engine, with at least one piston that is supported so that the piston can slide in a piston guide provided in a housing. A drive shaft is supported in the housing (10) on which drive shaft a crank element is provided. A stroke ring is supported in rotary fashion on the crank element and the piston can be acted upon by the drive shaft by way of this stroke ring. In order to prevent high lateral forces on the piston, the piston is supported on the non-rotating stroke ring with a sliding surface disposed on it against an associated slide bearing surface, wherein lubrication grooves are let into the slide bearing surface, crosswise to the relative motion between the piston and the stroke ring.

Abstract: A throttle device having a throttle-flap connection piece which is produced from plastic. For an efficient production of the throttle-flap connection piece form plastic in the plastic injection-molding technique, it is necessary to avoid undesirable shrinkage in the pivoting region of the throttle flap and to seal off the bearing arrangements against penetrating plastic during the injection operation. The throttle device includes an annular insertion part which is arranged in the pivoting region of the throttle flap and which, connected to the bearing arrangements is embedded into the throttle-flap connection piece made form plastic, in order to protect the bearing arrangement against penetrating plastic. The injected-round insertion part is suitable for throttle devices which are made from plastic and which are provided for mixture-compressing spark-ignition or air-compressing auto-ignition internal-combustion engines.

Abstract: For reliable, secure contacting of a fuel injection valve, the valve has a guide bolt, which with its free end protrudes past free ends of the plug elements, so that prior to the insertion of the plug elements into corresponding receptacles, this guide bolt slides in a guide opening, so as to center the plug elements of the fuel injection valves. The invention is intended for contacting electromagnetically actuatable fuel injection valves for fuel injection devices.

Abstract: A throttle-valve housing of plastic has a metal insert which achieves dimensional stability in the region of the throttle valve. The throttle-valve housing is formed of plastic with a cavity bounded by an inner wall surface. In the wall there is arranged a metal insert which is covered on all sides by the plastic material and effects a stabilization of the plastic material, so that distorting, shrinking or the like is prevented and dimensional accuracy of the inner wall surface is ensured. The novel throttle-valve housing is simple to produce and has a high dimensional stability in spite of being formed from plastic material. The throttle-valve housing is suitable for internal-combustion engines of motor vehicles.

Abstract: A throttle appliances in which induction ducts are configured off-set with respect to the pivoting region of throttle elements, such that metering walls that are provided influence the air throughput at small opening angles of the throttle element in an optimum manner. The throttle appliance is characterized by its extremely accurately matched metering walls in a range of small opening angles of the throttle butterfly in the induction duct. The metering walls are achieved by a method of displacing a rotating chip-cutting element with its center (M) on a previously calculated path (B) in the induction duct in the axial direction with a radial offset. This method permits the manufacture of varied contours of metering walls in order to achieve desired air throughput/opening angle characteristics. The throttle appliance is usually employed in internal combustion engines which are preferably used in motor vehicles.

Abstract: The temperature of a measuring resistor is controlled for measuring the mass flow rate of intake air entering an internal combustion engine. The operating temperature of the measuring resistor is regulated by controlling the level of electric current flowing therethrough. A voltage signal based on the level of electric current flowing through the measuring resistor is generated which is indicative of the mass flow rate of air entering the engine. The operating temperature target value of the measuring resistor is adjusted based on the value of the voltage signal, to optimize the measurement sensitivity thereof based on the level of the intake air mass flow rate.

Abstract: A contact strip which includes a contact strip housing and a support part, which has conductor channels with connection leads extending within the conductor channels. Projecting from the contact strip are electrical connection leads in a lead line which serve to contact the fuel injection valves and which are fitted with plug elements, which contact electrical conductors of the fuel injection valves. The contact strip has an advantage of providing a contact to several fuel injection valves, which may be of any kind of construction, in a simple and reliable manner. The contact strip is particularly suitable for making common electrical contact to electrically operated fuel injection valves of internal combustion engines.

Abstract: A novel throttle device adjuster having a U-shaped fastening bracket, connected to a throttle valve shaft and having a sawtooth contour in the region of two locking segments that pass through a pulley in two fastening bracket receptacles; the sawtooth contour, together with the fastening bracket receptacles, produces a firm connection of the pulley to the fastening bracket without further connecting elements. The novel throttle device adjuster is especially suitable for throttle equipment in internal combustion engines of either the mixture-compressing, externally ignited or the air-compressing, self-ignited type. Instead of the sawtooth contour the two locking segments may pass through slots in the pulley and be bent over.

Abstract: The temperature of a measuring resistor is controlled for measuring the mass flow rate of intake air entering an internal combustion engine. The operating temperature of the measuring resistor is regulated by controlling the level of electric current flowing therethrough. A voltage signal based on the level of electric current flowing through the measuring resistor is generated which is indicative of the mass flow rate of air entering the engine. The operating temperature of the measuring resistor is adjusted based on the value of the voltage signal, to optimize the measurement sensitivity thereof based on the level of the intake air mass flow rate.