Abstract: A device is proposed for protecting a motor vehicle against theft. At least one signal processing evaluates a sensor signal of a sensor in a first operating mode for generating an activation signal for a functional unit. A signal unit evaluates the sensor signal in a second operating mode, which differs from the first operating mode, for producing an activation signal for an alarm-signal generator. An operating-state detection is provided for detecting whether the motor vehicle is in a deactivated state. The second operating mode is activated when the motor vehicle is in the deactivated state; the first operating mode is activated when the motor vehicle is in the activated state.

Abstract: A method for controlling the drive unit of a vehicle in which an extended overrun mode having reduced fuel consumption and reduced pollutant emission is possible. A free-wheel mode in which the vehicle operates with the clutch disengaged is set as a function of a driving situation or an operating state of the drive unit. An output variable of the drive unit, such as torque or vehicle speed, is set to a constant value during the transition between an engaged-clutch travel mode and a free-wheel mode.

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: The invention concerns a method and a drive arrangement for controlling an internal combustion engine, said internal combustion engine acting via a variable transmission, particularly a continuously variable transmission, on drivable wheels or the like of a motor vehicle, in which a fuel feed to the internal combustion engine is at least reduced in dependence on an operating state and the internal combustion engine operates in overrun mode and a gear ratio of the transmission is adjusted, independently of driver intention, in dependence on at last one operating parameter of the motor vehicle. It is provided that during overrun operation of the internal combustion engine (12), the gear ratio is controlled in such a way as to maximize the time interval for which the internal combustion engine (12) operates in the overrun operating state.

Abstract: The invention relates to a system for inputting a motor torque and a transmission ratio in a vehicle having a continuously variable transmission (3) with means (202) for determining a desired motor torque (205) while considering a signal representing a driver command; means (203) for determining a desired transmission ratio (206) while considering a signal representing a driver command; and, means (201) for determining the signal representing the driver command. The signal, which represents the driver command, is a relative driver accelerative force command (204, 204′). The invention further relates to a method for inputting a motor torque and a transmission ratio in a vehicle.

Abstract: A method and a device for starting an engine system, especially of a vehicle, which make possible a start of the engine system that is as quick and comfortable as possible. In this context, it is tested for a start request whether a starter-free starting method leads to a successful start of the engine system. For the case in which the test result is negative, the engine system is started automatically using a starter.

Abstract: A method and a device for operating an internal combustion engine, in particular of a motor vehicle, which allow detecting a function of at least one actuating element in an exhaust branch without an additional sensory system. The internal combustion engine includes exhaust-gas recirculation via which exhaust gas is conveyed from the exhaust branch to an intake manifold in an activated state. The internal combustion engine includes at least one actuating element in the exhaust branch. In at least one operating state of the internal combustion engine, given activated exhaust-gas recirculation, a first intake-manifold pressure is ascertained in a first position of the at least one actuating element in the exhaust branch, and a second intake-manifold pressure in a second position of the at least one actuating element in the exhaust branch. The function of the at least one actuating element in the exhaust branch is monitored as a function of a difference between the first and the second intake-manifold pressures.

Abstract: In a method for performing a functional diagnosis on a ventilation system of a crankcase of an internal combustion engine, a pulse valve is situated in a vent line. The pulse valve is controlled as a function of the pressure in the crankcase, the pressure being determined by a pressure sensor. In response to a high pressure, the pulse valve is opened to allow the vapors to be discharged via an intake pipe. In this context, the pulse valve is controlled as a function of operating requirements, exhaust gas requirements, and/or load conditions. Based on the pressure characteristic, it can be detected, for example, whether the oil level is sufficient, whether there is a leak in the closed ventilation system, or whether the internal combustion engine exhibits increased wear. As a result of an optimized operating method, blowby gases can be reduced, as well as emissions, and friction losses in the crankcase.

Abstract: A method for operating an internal combustion engine (1), especially of a motor vehicle, is described. Air and fuel are supplied to a combustion chamber (4) of the internal combustion engine (1) and exhaust gas is recirculated to the combustion chamber (4). The exhaust gas is recirculated to the combustion chamber (4) during overrun operation of the internal combustion engine (1).

Abstract: A device and a method for storing and/or analyzing data in a memory in a motor vehicle is described, the data being transmitted in the vehicle over a data bus to which are or can be connected components such as vehicle systems, sensors, actuators and other vehicle components. The memory is designed as a central memory medium for the components connected to the data bus, and it is also connected to the data bus in the vehicle. The data is stored permanently in the memory medium for the entire service life of the vehicle. In addition, the data is interpreted by analyzing arrangements connectable to the memory medium, preferably in such a manner that a measure of the usage and/or wear of the vehicle and/or its components is obtained.

Abstract: A method for starting a combustion engine including a starter and a speed sensor that supplies an output signal as a function of speed, and a device for measuring the vehicle system voltage to record a characteristic curve of the battery voltage during a starting phase and after the starting phase. The crankshaft position is ascertained from the characteristic curve of the battery voltage, during the starting phase of the combustion engine, in starter operation.

Abstract: A method of controlling and/or regulating the slip of a clutch, for example, a clutch of a transmission, for example, a CVT transmission, is provided, the clutch including a driving element and an output element. The method measures at least one driving rotational speed and at least one output rotational speed for the controlling and/or regulating of the slip of the clutch, at least one driving rotational speed being measured when the clutch is closed, and at least one output rotational speed being measured when the clutch is closed; and the method determines a corrected driving rotational speed and/or a corrected output rotational speed for considering errors in the measured driving rotational speeds and in the measured output rotational speeds, by considering the at least one driving rotational speed measured when the clutch is closed and the at least one output rotational speed measured when the clutch is closed.

Abstract: The invention relates to a method as well as an arrangement for determining cylinder-individual differences of a control variable in a multi-cylinder internal combustion engine. It is provided that a determination of cylinder-individual charge differences is carried out.

Abstract: A method for controlling the compression ratio &egr; in a supercharged combustion engine. The latter is provided with a control device in which a maximum final compression temperature T2,max is ascertained, and, within the framework of a precontrol, an optimum efficiency compression ratio &egr;opt is ascertained. The knock limit is determined from the compression ratio &egr;, to which it corresponds, and which is ascertained from the precontrol. As a function of the efficiency curve in the characteristics map &eegr;=f, a further change occurs in compression ratio &ggr; or a setting back of the change in compression ratio &egr;. The values learned for &egr; and the ignition angle as a function of the operating point are permanently stored in a characteristics map to which the engine control has access.

Abstract: In a method and a device for operating an electrical supercharger, the electrical supercharger is actuated for cooling and/or diagnostic purposes in the non-combustion operation of the internal combustion engine.

Abstract: The invention concerns a method and a drive arrangement for controlling an internal combustion engine, said internal combustion engine acting via a variable transmission, particularly a continuously variable transmission, on drivable wheels or the like of a motor vehicle, in which a fuel feed to the internal combustion engine is at least reduced in dependence on an operating state and the internal combustion engine operates in overrun mode and a gear ratio of the transmission is adjusted, independently of driver intention, in dependence on at last one operating parameter of the motor vehicle.

Abstract: According to the invention, an apparatus for detecting slip of a drive belt (4) of a generator (1) driven by a drive motor (2) is proposed, in which the slip of a drive belt (4) can be determined by observation of the on-board electrical system voltage (Ub) and of the signal course at the terminal (DF) of the generator (1). For determining the slip, the largest possible electrical load (10) is switched, and the voltage course of the on-board electrical system voltage (Ub) before and after the switching of the electrical load (10) is evaluated. By additional observation of the signal at the terminal (DF) of the generator (1), it is precluded that electrical consumers that are not observed could adulterate the result.

Abstract: The invention is directed to a method for protecting a catalytic converter in the exhaust gas of an internal combustion engine in a starting operation of the engine. An index is formed for the quantity of an air/fuel mixture which will first react exothermally in the catalytic converter downstream of the engine. The index is compared to a predetermined threshold value and fuel metering is cut off when the threshold value is exceeded.

Abstract: An air mass is supplied to the combustion chambers by an intake manifold (12) in an internal combustion engine (10). An underpressure store (18) of a servo system (20) can be subjected to an underpressure via this intake manifold (12). The air mass flow in the inlet region (30) of the intake manifold (12) is determined by a sensor (32) and is supplied to an electronic control unit (26) for the fill computation. The actuation of the servo system (20) is detected and the determined air mass flow is corrected with or directly after a detected actuation of the servo system (20).

Abstract: The invention concerns a method and a device for adjusting a torque output of a power train of a motor vehicle, wherein a driving machine is operably connectable to a driving end of a belt-type transmission and a driving end of the belt-type transmission is operably connected to drivable wheels or the like of the motor vehicle.