Abstract: A high-pressure fuel pump with a pressure relief valve which has improved hydraulic properties and a reduced number of high-pressure sealing points.

Abstract: A high-pressure fuel pump with a pressure relief valve which has improved hydraulic properties and a reduced number of high-pressure sealing points.

Abstract: An injection system for internal combustion engines is proposed, in which once the engine has been turned off, a pressure equalization is established between the intake side and the pressure side of the high-pressure fuel pump. This prevents uncombusted fuel from reaching the combustion chambers of the engine. The pressure prevailing on the pressure side and the intake side when the engine is off furthermore assures that vapor bubbles cannot form, and this makes starting the engine easier.

Abstract: An injection system for internal combustion engines is proposed, in which once the engine has been turned off, a pressure equalization is established between the intake side and the pressure side of the high-pressure fuel pump. This prevents uncombusted fuel from reaching the combustion chambers of the engine. The pressure prevailing on the pressure side and the intake side when the engine is off furthermore assures that vapor bubbles cannot form, and this makes starting the engine easier.

Abstract: The invention relates to a refinement of an air guiding system for an internal combustion engine, having an intake conduit which adjoins an air inlet opening downstream and is part of a gas guiding chamber that carries air from the air inlet opening to an outlet opening. In the air guiding system, an air filter is embodied as an interchangeable cartridge in such a way that the air filter is insertable into and removed from the intake conduit.

Abstract: An air duct system of an internal combustion engine comprising various components disposed at various points in the engine compartment of the motor vehicle. The air duct system includes a gas guide chamber that leads through the air duct system via a course such that only a small total installation space is needed. Part of the air duct system is curved, and the curved region has another part of the gas guide chamber that passes through it. The air duct system is intended in particular for an internal combustion engine of a motor vehicle.

Abstract: A device is disclosed for regulating the intake air temperature in an internal combustion engine. It comprises a cold air duct, a warm air duct and a mixed air duct, the mixed air duct, also called primary air duct, is provided with a control flap, which in one final position closes off the cold air duct and in the other final position closes off the warm air duct and can pivot under the action of a wax-type thermostat around which the cold intake air flows. The wax-type thermostat is provided with a tie rod connecting it to the control flap. A restoring spring is located on the tie rod. In addition, an excess travel spring is provided to compensate for the excess travel of the wax-type thermostat. The control flap has longitudinal guiding means designed to take up the excess travel, the excess travel spring being mounted on longitudinal guiding means.

Abstract: A control for a throttling member, for example a throttle butterfly of an internal combustion engine. The actuating device has an actuating member which is designed as a plastic part and is molded onto one end of an adjusting shaft by means of an inner fixing sleeve and a recess made in the adjusting shaft in the form of a slot which is filled with plastic, thus allowing reliable torque transmission. The actuating device is suitable for throttling devices of mixture-compressing, spark-ignition or air-compressing, self-ignition internal combustion engines.

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: 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 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: Heating devices are used to prevent icing and deposition of fuel on the throttle valve under adverse operating conditions; these device comprise electrical resistance hot wires applied to the surface of the throttle valve, yet these wires lead to undesired turbulence in the fuel-air mixture flow. As the length of time in operation increases, the efficiency of the hot wires is lessened by corrosion of their surface. These disadvantages are avoided by integrating the heating device with the component to be heated. To this end, the heating device is disposed in an axial bore of the throttle valve shaft. This arrangement is used especially with mixture-compressing internal combustion engines equipped with carburetors or central injection systems.