Abstract: A fuel injection system for internal combustion engines in which a high pressure fuel reservoir is provided, from which fuel is supplied to injection valves in an electrically controlled manner. In order to reduce damage which occurs when there are leaks from the high pressure reservoir, the high pressure reservoir is enclosed by a sheath that can capture the emerging leakage fuel.

Abstract: A method and a device for monitoring a fuel-metering system, in particular a common-rail system for a diesel fuel engine. A defect is recognized on the basis of an output signal from a structure-borne noise sensor.

Abstract: A device for controlling at least one electromagnetic load, which includes a first switching device arranged between a first terminal of a supply voltage and a first terminal of at least one load, and a second switching device arranged between a first terminal of an assigned load and the second terminal of the supply voltage. The energy released during the transition from a first higher current (IH) to a second lower current (IH) is stored in a storage device.

Abstract: In a process and in a device for monitoring a fuel delivery system, in particular a common rail system for a diesel engine, a defect in the delivery system is found when a signal from a temperature sensor and/or a pressure sensor deviates from a predetermined value.

Abstract: A method for operating a fuel injection system and a fuel injection system for performing the method, in which the fuel is supplied in measurable amounts at high pressure to a high-pressure fuel reservoir, whose pressure is controlled by a pressure control valve and from which fuel is drawn for injection via electrically controlled injection valves. The system is monitored for leakage losses in that the fuel quantity supplied to the high-pressure fuel reservoir by a fuel pump and the quantity removed from the high-pressure fuel reservoir via the injection valves and the pressure control valve are compared with one another, and if these quantities deviate from one another a signal device is tripped, or an intervention into the operation of the fuel injection system is made.

Abstract: In a system and method for equalizing fuel-injection quantities among cylinders of an internal combustion engine, angular acceleration is measured during the combustion process of each cylinder of the internal combustion engine. The individual measured values of the angular acceleration are compared to one another. In case of deviations between the individual measured values, the fuel-injection quantity is altered in a way that allows for the deviations to be compensated.

Abstract: A control system for a fuel pump, particularly for a solenoid-valve-controlled fuel pump in the case of a self-ignitable internal-combustion engine, in which at least one pulse transmitter is mounted on the crankshaft and/or on the camshaft. The generated pulse sequences include at least several reference pulses for establishing the beginning of fuel injection, as well as speed pulses for detecting the average and the instantaneous rotational speeds. A trial activation takes place to detect into which cylinder the fuel must be injected. Based on the reaction of the fuel injection system and/or of the internal-combustion engine, it is detected whether fuel was injected into the proper cylinder.