Abstract: A method of operating an internal combustion engine with direct gasoline injection and controlled self-ignition, wherein the internal combustion engine includes a combustion chamber, at least one intake valve and at least one exhaust valve each having an adjustable opening time. The method includes compressing an ignitable gas mixture that contains residual gas in the combustion chamber during a compression stroke, where the gas mixture self ignites, and altering step-wise over multiple combustion cycles at least one of a residual gas volume and a point of injection time to an interim value other than a value assigned to a target load during a load transfer from an initial load to the target load.

Abstract: A method and a device, a computer program and a computer program product for implementing a method for calibrating a fuel injector of an internal combustion engine, including the following: a) Specifying a first relationship between an injection quantity and an actuating variable of the fuel injector for implementing the injection quantity, b) Specifying a setpoint injection quantity, c) Specifying at least one setpoint value for the actuating variable of the fuel injector according to the first relationship, or implementing the setpoint injection quantity, d) Determining an indicated work resulting from the implementation of the at least one setpoint value for the actuating variable, e) Comparing a variable as a function of the determined resulting indicated work to an expected value, f) Correcting the at least one setpoint value for the actuating variable of the fuel injector as a function of the comparison result.

Abstract: The procedure and device of the present disclosure enable an accurate determination of the composition of the fuel mixture at a self-igniting combustion engine on the basis of present sensor signals. The procedure and device of the present disclosure furthermore enable the detection and compensation of a combustion that is unstable due to the composition of the fuel mixture.

Abstract: The invention concerns a procedure for determining the composition of a fuel mixture from a first fuel and a second fuel or for determining the quality of a fuel for operating a combustion engine with at least one cylinder pressure sensor in at least one cylinder of the combustion engine for determining the pressure history during a combustion process and a cylinder pressure based motor regulation for regulating the load and the combustion situation of the combustion engine. It is thereby provided that the determination of the composition of the fuel mixture or the quality of the fuel takes place with the aid of regulator information of the cylinder-pressure-based motor regulation. The procedure enables the continuing determination of the composition of the fuel mixture and the quality of the fuel at cylinder-pressure-based motor regulations without additional components as for example an ethanol sensor.

Abstract: Operating a self-igniting internal combustion engine includes: specifying a setpoint combustion position and a setpoint combustion noise feature; operating at least one cylinder of internal combustion engine for at least one cycle while maintaining a first injector control variable and/or an air valve control variable and a second injector control variable and/or a second air valve control variable; ascertaining actual combustion position and actual combustion noise feature of the at least one cylinder; comparing the actual combustion position to the setpoint combustion position and, in case the actual combustion position deviates from the setpoint combustion position, determining anew the first injector control variable and/or the air valve control variable; and comparing the actual combustion noise feature to the setpoint combustion noise feature and, in case the actual combustion noise feature deviates from the setpoint combustion noise feature, determining anew the second injector control variable and/or

Abstract: A method for controlling a compression-ignition internal combustion engine includes the following steps: predefining a setpoint combustion point for the compression-ignition internal combustion engine, predefining a calculation model for calculating a probable deviation of a future cycle of the internal combustion engine from the predefined setpoint combustion point while taking an ascertained actual combustion point of a completed cycle of the internal combustion engine into consideration, predefining a mean deviation for the internal combustion engine, operating the internal combustion engine for a first cycle and ascertaining an actual combustion point of the first cycle, calculating a probable deviation of a second cycle, which occurs after the first cycle, of the internal combustion engine from the predefined setpoint combustion point, comparing the calculated probable deviation of the second cycle to the predefined mean deviation, and ascertaining at least one operating variable for operating the intern

Abstract: A method for operating an internal combustion engine, especially an internal combustion engine that is operable, at least in a part-load range, in an operating mode with auto-ignition, in which, at an abrupt change in load and/or at a changeover between an operating mode with auto-ignition and an operating mode without auto-ignition, a parameter of the combustion process correlating with the combustion noise is adapted stepwise over a plurality of combustion cycles from a first parameter value before the abrupt change in load or the changeover to a second parameter value after the abrupt change in load or the changeover, by influencing a combustion position of the combustion process.

Abstract: A method for controlling a self-igniting internal combustion engine includes: specifying a target combustion position; determining at least one actual combustion position of at least one cycle of the internal combustion engine; specifying a computing model for calculating a following combustion position as a function of the at least one actual combustion position; calculating the following combustion position using the computing model; comparing the calculated following combustion position with the specified target combustion position; and determining at least one operating quantity for operating the internal combustion engine for at least one cycle as a function of the comparison of the calculated following combustion position with the specified target combustion position.

Abstract: A method for operating a self-igniting internal combustion engine includes: introduction of a prespecified pre-injection quantity (PI) of a fuel into the internal combustion engine before and/or during an intermediate compression; determination of a pressure characteristic (PZV) in the internal combustion engine during the intermediate compression; prespecification of a target pressure characteristic (PZV0); comparison of the determined pressure characteristic (PZV) with the prespecified target pressure characteristic (PZV0); determination that no release of energy occurred during the intermediate compression, provided that the determined pressure characteristic (PZV) is lower than the target pressure characteristic (PZV0); and compensation of the non-occurrence of the energy release and its effect on a main combustion.

Abstract: A method for regulating an internal combustion engine that is operable, at least in a part-load range, in an operating mode with auto-ignition and a combustion process of which is influenced by a manipulated variable, the method includes the steps of determining a desired value of a combustion position feature of the combustion process; determining the manipulated variable by predictive closed-loop control based on a modeling of the combustion position feature as a function of the manipulated variable in the combustion process; and determining, as the manipulated variable, a value at which the difference between the desired value of the combustion position feature and a model-based predicted combustion position feature is minimized.

Abstract: In order to operate an internal combustion engine, a fresh-air quantity, a residual-gas quantity and a fuel quantity are provided as a function of a load demand. During a change of load from a first to a second load demand, provision is made for the residual-gas quantity to first be provided according to the first load demand and for the fuel quantity to first be provided according to the second load demand.

Abstract: A method and system for determining the point of engagement of a clutch of a motor vehicle operable via an actuating device, where the actuating device has an electrically drivable positioning motor that is operationally linked to an actuating mechanism which actuates the clutch and operates via a control unit. The point of engagement is determined through an application of a constant voltage to the positioning motor in a first operating mode. The motor speed is detected as a function of the rotational angle position. The motor current is detected as a function of the rotational angle position, and/or by application of a constant current to the positioning motor in a second operating mode. The point of engagement is determined from the detected values of the motor speed, that are a function of the rotational angle position and from the values of the motor current.

Abstract: Procedure for the operation of an internal combustion engine, particularly a gasoline engine with direct gasoline injection and controlled self-ignition, whereby the internal combustion engine (1) comprises a combustion chamber (2), at least one intake valve (EV) and at least one exhaust valve (AV), whose opening times can be altered, and an ignitable gas mixture, which contains residual gas, is compressed in the combustion chamber (2) during a compression stroke (V), whereby the gas mixture self ignites during the compression stroke (V). During a load transfer from an initial load to a target load, the residual gas volume and/or the point of injection time is altered for at least one power stroke to an interim value other than the value assigned to the target load.

Abstract: A method for operating an internal combustion engine working according to the Otto principle, in which fuel, particularly gasoline, is injected directly into a combustion chamber and is inflamed by self-ignition. A characteristic quantity characterizing the stability of combustion of an air/fuel mixture located in the combustion chamber is ascertained, and, as a function of the characteristic quantity, a residual gas proportion in the cylinder associated with the combustion chamber is set, in particular minimized, the residual gas proportion being reduced, preferably iteratively, as long as the characteristic quantity does not fall below a specifiable stability boundary.

Abstract: A method and a system for determining the point of engagement of a clutch of a motor vehicle operable via an actuating device, in particular of a clutch situated in a transfer case of a motor vehicle having all-wheel drive, the actuating device having a positioning motor which is electrically drivable, the output of the positioning motor providing a motor torque and a motor speed, and the motor being operationally linked to an actuating mechanism which actuates the clutch and being operable via a control unit.

Abstract: An electronically commutated motor contains a rotor position determination, which detects a surface at which the rotor and stator poles (10 through 15; 17 through 20) diametrically oppose one another. The total surface is taken into consideration in the position determination. The pole angles (&bgr;S, &bgr;R) of the stator and rotor poles (10 through 15; 17 through 20) are each set to values at which a rotor rotation results in a surface change.

Abstract: An electronically commutated motor contains a rotor position determination, which detects a surface at which the rotor and stator poles (10 through 15; 17 through 20) diametrically oppose one another. The total surface is taken into consideration in the position determination. The pole angles (&bgr;S, &bgr;R) of the stator and rotor poles (10 through 15; 17 through 20) are each set to values at which a rotor rotation results in a surface change.

Abstract: A switched, brushless reluctance motor (10) has a radial flux stator (12), on whose radial flux poles (15 through 18) electrical radial flux coils (21 through 24) are situated for generating a radial magnetic flux (13) acting in the radial direction upon a rotatably mounted armature (11) having at least two armature poles (19, 20), a rotating motion being impartable to the armature (11) by applying a cyclically switched power to the radial flux coils (21 through 24); during said rotation the at least two armature poles (19, 20) are rotated in the direction of the radial flux poles (15, 17) which are magnetically excited at the time in order to shorten the particular radial magnetic flux path passing through the armature poles (19, 20).

Abstract: A method and an apparatus for controlling the brake system of a vehicle consisting of at least two component vehicles is described, where the brake system of the second component vehicle is controlled from the first component vehicle. The first time the brake pedal is actuated or the first time the brake pedal is released after the braking force has been built up, actuation pulses for the brake system of the second component vehicle are formed, which are derived from the application point of the brakes of the second component vehicle.

Abstract: A method and an apparatus for controlling the brake system of a vehicle consisting of at least two component vehicles are proposed, where at least one of these component vehicles is equipped with an electrically controlled brake system. As a function of the actuation of the brake pedal, nominal values for the control of the wheel brakes are formed. An actuating variable for controlling the wheel brakes of the second component vehicle is formed in this first component vehicle. During a braking operation of the complete vehicle, the actuating variable for one component vehicle is modified by a value which, in the event that the brakes of the first component vehicle are not engaged, is determined by adjustment of the actuating variable for the second component vehicle or by adjustment of the nominal values for the wheel brake of the first component vehicle.