Abstract: An ignition system for an internal combustion engine, having a combustion chamber and a fuel injection device which injects a fuel directly into the combustion chamber in stream-guided fashion, is configured so that the ignition system has a positive polarity.

Abstract: The invention relates to a method for operating a combustion engine (1) comprising a fuel-driven heat engine (5), which permits a differentiation of faults during the supply of fuel. To this end, the fuel is supplied under pressure to the heat engine (5) via a fuel supply (10). A pressure reduction speed in the fuel supply (10) is determined, and a fault is inferred based on a comparison of the pressure reduction speed with a predetermined threshold value.

Abstract: A sealing element for a fuel injector insertable into a receiving bore of a cylinder head of an internal combustion engine for direct injection of fuel into a combustion chamber of the internal combustion engine includes a sealing element surrounding a nozzle body of the fuel injector peripherally. The sealing element includes a base body having an axial recess through which the nozzle body extends. The base body also has an annular recess which communicates with the recess and into which the sealing element is introduced. At a first contact face, the base body is in at least indirect contact with an end face of the fuel injector, and at a second contact face opposite the first contact face, the base body is at least in indirect contact with a step of the receiving bore.

Abstract: A method for operating an internal combustion engine having a fuel-driven combustion motor, making possible a differentiation of faults in the fuel delivery system. Fuel is delivered under pressure to the combustion motor via a fuel delivery system. A pressure decay rate in the fuel delivery system is determined, and a fault is inferred as a function of a comparison of the pressure decay rate with a predefined threshold value.

Abstract: An ignition system for an internal combustion engine, having a combustion chamber and a fuel injection device which injects a fuel directly into the combustion chamber in stream-guided fashion, is configured so that the ignition system has a positive polarity.

Abstract: In a method for operating an internal combustion engine of a motor vehicle, in particular, pressurized fuel is conveyed to a fuel accumulator. The fuel is injected into a combustion chamber via a fuel injector. Coking of the fuel injector is determined. A first fuel-pressure increase is implemented when the coking exceeds a threshold value.

Abstract: An alignment element for securing a fuel injector, for the direct injection of fuel into the combustion chamber of an internal combustion engine, to a cylinder head of the internal combustion engine in a manner to ensure locking against rotation includes a ring that is slipped onto the fuel injector, provided on the ring is at least one plug that is arranged on the ring, slipped onto the fuel injector, in such a manner that it is able to snap into a recess in a plastic coating of the fuel injector.

Abstract: A sealing element for a fuel injector insertable into a receiving bore of a cylinder head of an internal combustion engine for direct injection of fuel into a combustion chamber of the internal combustion engine includes a sealing element surrounding a nozzle body of the fuel injector peripherally. The sealing element includes a base body having an axial recess through which the nozzle body extends. The base body also has an annular recess which communicates with the recess and into which the sealing element is introduced. At a first contact face, the base body is in at least indirect contact with an end face of the fuel injector, and at a second contact face opposite the first contact face, the base body is at least in indirect contact with a step of the receiving bore.

Abstract: In a method for operating an internal combustion engine of a motor vehicle, in particular, pressurized fuel is conveyed to a fuel accumulator. The fuel is injected into a combustion chamber via a fuel injector. Coking of the fuel injector is determined. A first fuel-pressure increase is implemented when the coking exceeds a threshold value.

Abstract: A sealing element (2) for a fuel injector (1) insertable into a receiving bore (3) of a cylinder head (4) of an internal combustion engine for direct injection of fuel into a combustion chamber (7) of the internal combustion engine has a sealing element (17) surrounding a nozzle body (5) of the fuel injector (1) peripherally. The sealing element (2) includes a base body (15) having an axial recess (16) through which the nozzle body (5) extends. The base body (15) also has an annular recess (18) which communicates with the recess (16) and into which the sealing element (17) is introduced. At a first contact face (51), the base body (15) is in at least indirect contact with an end face (58) of the fuel injector (1), and at a second contact face (57) opposite the first contact face (51), the base body (15) is at least in indirect contact with the step (11) of the receiving bore (3).

Abstract: An alignment element for securing a fuel injector (1), for the direct injection of fuel into the combustion chamber of an internal combustion engine, to a cylinder head (2) of the internal combustion engine in a manner to ensure locking against rotation includes a ring (10) that is slipped onto the fuel injector (1); provided on the ring (10) is at least one plug (11) that is disposed on the ring (10), slipped onto the fuel injector (1), in such a way that it is able to snap into a recess (12) in a plastic coating (9) of the fuel injector (1).

Abstract: A fuel injector (1) for direct injection of fuel into a combustion chamber of an internal combustion engine has at least one retaining flange (5) situated on a nozzle body (2) of the fuel injector (1). The retaining flange (5) projects radially above the nozzle body (2), and a hold-down device may act on it. The retaining flange (5) may rest on a cylinder head of the internal combustion engine. The retaining flanges (5) extend over only portions of the periphery of the nozzle body (2).

Abstract: A sealing element (2) for a fuel injector (1) insertable into a receiving bore (3) of a cylinder head (4) of an internal combustion engine for direct injection of fuel into a combustion chamber (7) of the internal combustion engine has a sealing element (17) surrounding a nozzle body (5) of the fuel injector (1) peripherally. The sealing element (2) includes a base body (15) having an axial recess (16) through which the nozzle body (5) extends. The base body (15) also has an annular recess (18) which communicates with the recess (16) and into which the sealing element (17) is introduced. At a first contact face (51), the base body (15) is in at least indirect contact with an end face (58) of the fuel injector (1), and at a second contact face (57) opposite the first contact face (51), the base body (15) is at least in indirect contact with the step (11) of the receiving bore (3).

Abstract: A housing body of a fuel injector has a multi-part design; it includes a base member and at least one calibrating sleeve. Air is supplied and metered in through the calibrating sleeve, while the base member is used for sealing and attachment purposes. A dimensionally accurate machining of calibrating sleeves can be carried out simply and cost-effectively. The structural design easily yields many different variants. The fuel injector is especially suited for fuel-injection systems of mixture-compressing internal combustion engines having externally supplied ignition.

Abstract: A fuel injection valve comprising a front attachment in whose wall a blocking element is displaceably supported; on its slide segment toward an air chamber, the pressure in the inlet tube upstream of a throttle valve prevails, while in the opposite direction the intake tube pressure downstream of the throttle valve is operative. If there is a sufficient pressure difference, the blocking element is displaced to the left far enough that it blocks at least one injection port on the fuel injection valve and blocks one guide conduit in the front attachment. As a result, only the one open inlet valve of one cylinder of the engine is supplied with fuel, via the at least one open injection port and the open guide conduit. The fuel injection valve is especially suitable for fuel injection in mixture-compressing internal combustion engines with externally supplied ignition.

Abstract: An atomizing sieve of a fuel injection valve having a dish-like concavely cambered form is provided downstream of at least one spray orifice of the fuel injection valve, as seen in the direction of flow of fuel. The atomizing sieve is cast with an outer circumferential region in a protective cap provided at the downstream end of the fuel injection valve. For protection against mechanical effects, protective prongs of the protective cap project further downstream than the lowest region of the atomizing sieve. When the fuel is being injected, a part quantity collects in this lowest region and represents a comparatively static liquid quantity which new fuel then strikes. This arrangement allows an ideal break-up of the fuel into very small droplets. The atomizing sieve also forms a protective shield against icing-up, plugging and settlement of chemical substances within the fuel injection valve.

Abstract: A fuel injection valve has an attachment with a two-part design including a main body and an insert. With the attachment, the functions of supplying and metering gas are optimized independently of the functions of sealing off the fuel injection valve with respect to an intake conduit and of securing the attachment onto the fuel injection valve. In addition, the fuel injection valve and attachment provide a modular system which allows a large number of possible variations which can be achieved by simple and inexpensive component changes.