Abstract: The invention is directed to an internal combustion engine (1) especially of a motor vehicle. The engine (1) includes a combustion chamber (4) wherein fuel can be injected during a compression phase in a stratified mode of operation. A control apparatus (18) is provided for determining an injection duration in the stratified operation in dependence upon the pressure difference between a fuel pressure, which operates on the fuel, and a combustion chamber pressure present in the combustion chamber (4). A mean fuel pressure is determined by the control apparatus (18).

Abstract: In the case of a method for operating an internal combustion engine (10), in particular of a motor vehicle, fuel is supplied under pressure via at least one injection valve (18). The injected fuel quantity is influenced by the injection time of injection valve (18). In order to be able to provide optimum operating comfort and good component reliability even in the event of an incorrect fuel pressure (pr), it is proposed to determine a maximum allowable torque (mimxth) of the internal combustion engine (10) that is dependent on the instantaneous fuel pressure (pr).

Abstract: The invention relates to a fuel delivery system for an internal combustion engine, having a fuel feed pump (10), which delivers fuel which is at pilot pressure to a high-pressure fuel pump (11) that communicates on the high-pressure side with at least one injection valve (14), in order to deliver fuel at high pressure to the injection valve or valves (14). To prevent vapor bubble development in the high-pressure fuel pump (11), which impairs its pumping capacity and pressure generation, it is provided according to the invention that a coolant medium flow can be delivered to the high-pressure fuel pump (11) via at least one coolant conduit (21, 31), in order to keep the temperature (THDP) of the high-pressure fuel pump (11) below a critical operating temperature (Tk1).

Abstract: A fuel supply device for an internal combustion engine of a motor vehicle has a supply container, a feeding aggregate which is electric-motor driven and feeds fuel from the supply container to an injection device of the internal combustion engine, a pressure sensor which determines a fuel pressure downstream of the feeding aggregate, a control device connected with the pressure sensor and controlling an operation of the feeding aggregate so that a fuel pressure is at least approximately below a nominal pressure, a throttled discharge arranged downstream of the feeding aggregate, a valve device operative for controlling the discharge depending on a fuel pressure and opening the discharge when a fuel pressure located under the nominal pressure is exceeded, and a check valve integrated in the feeding aggregate.

Abstract: Method for operating a fuel supply system of an internal combustion engine, especially of a motor vehicle, wherein fuel is pumped into a storage space (17) with the aid of a pump (12, 16) and a pressure is generated in the storage space (17). In the system, an actual value of the pressure is measured with the aid of a pressure sensor (21) and the pressure in the storage space (17) is controlled (open loop and/or closed loop) to a desired value. A fault in the fuel supply system (10) is detected via a plausibility control. When a fault in the fuel supply system (10) is detected, a diagnostic cycle of the internal combustion engine is initiated. Diagnostic functions are activated which check individual components (18, 19, 21) of the fuel supply system (10) as to operability.

Abstract: An operating device for an internal combustion engine of a motor vehicle with a starter having an electric motor, the operating device has a fuel pump; and a connection of said fuel pump with the electric motor so that the electric motor can be used additionally at least indirectly for driving of said fuel pump.

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: An internal combustion engine (1), especially for a motor vehicle, is described and is provided with an injection valve (9) with which the fuel, which is to be injected for a combustion, can be injected directly into a combustion chamber (4) during an induction phase and during a compression phase. A control apparatus (12) is provided for controlling (open loop and/or closed loop) the fuel mass injected into the combustion chamber (4). A pressure sensor is provided for measuring the pressure with which the fuel is injected into the combustion chamber (4). The fuel is injected via the control apparatus (12) during the induction phase when the pressure is less than a pregivable minimum pressure.

Abstract: A fuel supply system for supplying an internal combustion engine has a consumption-controlled fuel feeding module which at a suction side is connected with a supply tank and at the pressure side is connected with an internal combustion engine. At pressure side of the fuel feeding module a return conduit is leads to at least one pump for filling of the fuel feeding aggregate. A preliminarily supplied return is blockable by a switchable adjusting member which adjusts the return quantity with an open switchable adjusting member by means of a throttle element in all operational conditions above a minimal pump consumption.

Abstract: The invention is directed to a method and an arrangement for operating a fuel supply system (10) and especially a fuel supply system of an internal combustion engine of a motor vehicle. Fuel is pumped into an accumulator (19) with the aid of pumps (13, 24) and the fuel is adjusted at least to a first pressure (P1) or a second pressure (P2). Initially, the first pressure (P1) is adjusted and a pressure signal (PS1) is detected and, thereafter, the second pressure (P2) is adjusted and a pressure signal (PS2) is detected. A pressure difference (&Dgr;P) is formed from the detected first and second pressure signals (PS1, PS2). If the pressure difference &Dgr;P deviates from an expected pressure difference (&Dgr;P_E) by more than a threshold value (S), then a fault in the fuel supply system (10) is detected and stored.

Abstract: An internal combustion engine, in particular for a motor vehicle, which is provided with a fuel pump which can deliver fuel into a pressure reservoir. A control device is provided, which is connected to the fuel pump. The delivery quantity of the fuel pump can be changed and the fuel quantity supplied to the pressure reservoir can be adjusted to a required fuel quantity by influencing the delivery quantity of the fuel pump. The control device can control the delivery quantity of the fuel pump by a program map as a function of a number of input variables during the startup of the engine.

Abstract: The invention is directed to an internal combustion engine (1) especially of a motor vehicle. The engine (1) includes a combustion chamber (4) wherein fuel can be injected during a compression phase in a stratified mode of operation. A control apparatus (18) is provided for determining an injection duration in the stratified operation in dependence upon the pressure difference between a fuel pressure, which operates on the fuel, and a combustion chamber pressure present in the combustion chamber (4). A mean fuel pressure is determined by the control apparatus (18).

Abstract: A fuel supply device for an internal combustion engine of a motor vehicle has a supply container, a feeding aggregate which is electric-motor driven and feeds fuel from the supply container to an injection device of the internal combustion engine, a pressure sensor which determines a fuel pressure downstream of the feeding aggregate, a control device connected with the pressure sensor and controlling an operation of the feeding aggregate so that a fuel pressure is at least approximately below a nominal pressure, a throttled discharge arranged downstream of the feeding aggregate, a valve device operative for controlling the discharge depending on a fuel pressure and opening the discharge when a fuel pressure located under the nominal pressure is exceeded, and a check valve integrated in the feeding aggregate.

Abstract: A fuel supply system for an internal combustion engine, particularly of a motor vehicle, includes a control unit for determining a fuel quantity to be injected, the fuel quantity to be injected being initially increased during a start of the internal combustion engine and then being reduced again. The fuel supply system also includes a fuel injector for injecting the fuel quantity to be injected into a combustion chamber. It is checked by the control unit whether a combustion has taken place in the cylinder, and, if no combustion has taken place, the fuel quantity to be injected is not reduced, or is not reduced to the same extent as when a combustion has taken place.

Abstract: An operating device for an internal combustion engine of a motor vehicle with a starter having an electric motor, the operating device has a fuel pump; and a connection of said fuel pump with the electric motor so that the electric motor can be used additionally at least indirectly for driving of said fuel pump.

Abstract: A method and a device for driving at least one solenoid valve used for controlling the injection of fuel into an internal combustion engine. At the start of the driving (activation), the solenoid valve is supplied with a booster voltage that is elevated as compared to that used for the further driving. The energy and/or power output received by the solenoid valve at the start of the driving is able to be influenced as a function of the operating state of the internal combustion engine.

Abstract: An internal combustion engine in particular for a motor vehicle, which is equipped with an injection valve with which fuel can be injected either, in a first operating mode, during a compression phase or, in a second operating mode, during an intake phase, directly into a combustion chamber delimited by a piston. The internal combustion engine also has a spark plug with which the fuel injected into the combustion chamber can be ignited. A control device is present, with which the injection valve and the spark plug can be controlled. Injection of the fuel is terminated by the control device prior to ignition of the fuel. This prevents carbon deposition on the spark plug, especially when the internal combustion engine is started.

Abstract: The invention is directed to a method of checking a pressure sensor of a fuel supply system of an internal combustion engine such as an engine for a motor vehicle. The fuel supply system includes a pressure store to which fuel is supplied and a pressure sensor for measuring the pressure in the pressure store. Fuel is supplied from the pressure store to a combustion in the engine and the pressure in the pressure store is changed. The behavior of the combustion of the fuel is detected and a conclusion is drawn as to the operability of the pressure sensor from the detected behavior of the combustion.

Abstract: A waveguide laser comprises a laser-active medium, a pump source for the laser-active medium and a resonator with a waveguide extending in an axial direction and formed from a cylindrical, outer optical waveguide surface and a cylindrical, inner optical waveguide surface. A resonator radiation field extends substantially parallel to the axial direction between the outer and inner optical waveguide surfaces. The waveguide laser further comprises two cavity mirrors between which the resonator radiation field extends and of which at least a first mirror comprises successive maximum and minimum reflectivity values in a direction azimuthal to the axial direction. The maximum and minimum reflectivity values of the first cavity mirror, viewed in the azimuthal direction, are arranged at the location of maximum and minimum intensities of a selected azimuthally closed mode of the resonator, which mode is enclosed by the resonator radiation field.

Abstract: In order to produce a gas discharge structure for two-dimensionally extending gas discharges comprising a pair of electrodes including a first and a second electrode which have mutually facing electrode surfaces, a gas discharge space arranged between the electrode surfaces with a plasma gas provided therein and a high frequency source with which a current can be fed into the pair of electrodes for producing a plasma between the first and the second electrode, in such a way that wavelength dependent modulations of the field strength substantially no longer occur in the gas discharge space, it be proposed that, the electrode surface of the first electrode is divided into two partial electrode surfaces that are located adjacent to one another in this electrode surface but are electrically separated from one another, that the partial electrode surfaces have mutually facing edge regions which extend at a defined distance from one another, that the partial electrode surfaces be connected to two terminals of the hi