Abstract: A control system and a control method for an internal combustion engine have a cylinder including an intake valve and an exhaust valve with a fully variable valve-gear assembly. An engine control unit determines setpoint values with regard to a fresh gas charge, an internal residual gas charge, a torque reduction, an EGR control strategy, and a charging strategy. In addition, a transmission device is provided which transmits setpoint values determined by the engine control unit to a valve control unit in synchronization with the crankshaft angle. The valve control unit controls the fully variable valve-gear assembly of the intake and exhaust valve of the cylinder of the internal combustion engine on the basis of the setpoint values determined by the engine control unit.

Abstract: A method for determining mass flows into the inlet manifold (3) of an internal combustion engine, with means (5, 6, 9), for controlling the air intake into the inlet manifold (5, 6, 9), means (4), for determining the inlet manifold pressure and means (11) for evaluating the inlet manifold pressure curve, is disclosed. Within the disclosed method, the air intake into the inlet manifold, on switching off the internal combustion engine, is reduced by a set amount and the curve for the inlet manifold pressure thus produced is evaluated for the estimation of the mass flows and a leak in the inlet manifold proven by an increased rate of pressure change.

Abstract: The invention describes an internal combustion engine (1), in particular for a motor vehicle, in which fuel can be injected into a combustion chamber (4) in at least two operation types, and in which an air/fuel mixture can flow through a tank ventilation valve (17) and can be supplied to the combustion chamber (4). A control unit (18) can be used to determine a specific desired fuel rate for the air/fuel mixture flowing through the tank ventilation valve (17).

Abstract: The present invention relates to a connection (24) between a shaft end (20) of a gas exchange valve (1) of an internal combustion engine and a sleeve-shaped actuating element (2) of a valve actuator (4), which is guided in an axially movable manner within a pressure region (58), which is able to be pressurized with a pressure medium, of the valve actuator (4) and at least partially surrounds the shaft end (20).

Abstract: An internal combustion engine includes at least one inlet valve whose operation can be described at least by the parameters: opening angle, closing angle, valve stroke curve (H1, H2) and phase position (pn) of the valve stroke curves (H1, H2). At least one of the parameters (pn) can be continuously shifted and at least one other parameter (H1, H2) can be switched stepwise. In order to avoid jumps of the torque generated by the engine when switching over, it is suggested that, in advance of a switchover (74) of the step-wise switchable parameter (H1, H2), the continuously shiftable parameter (pn) is so adjusted (72) that, with the switchover (74) of the stepwise switchable parameter (H1, H2), at least one condition variable (rl) of the combustion of a combustion chamber assigned to the inlet valve is not changed or not significantly changed.

Abstract: A device for determining air entering cylinders of an internal combustion engine having a supercharger. The air is determined as a function of such quantities as rpm, air throughput in the intake manifold, throttle valve position values and temperature, characterized in that at least the following physical relationships are included in the determination: suction equation of the engine balancing equation for a filling in an intake manifold flow rate equation at a throttle valve balancing equation in a volume between the throttle valve and the supercharger.

Abstract: An internal combustion engine includes a combustion chamber, a crankshaft and inlet and outlet valves. The engine is operated with a method wherein a fresh air charge (rl) of the combustion chamber and the engine rpm (nmot) are considered when computing a pressure (ps) in a region lying upstream of the inlet valve. The computation is done by utilizing at least one of thermodynamic equations and flow equations at at least one discrete time point during a work cycle of the engine. Or, a pressure (ps) in the above region and the rpm (nmot) of the crankshaft are considered when computing the fresh air charge (rl) of the combustion chamber by utilizing one of thermodynamic equations and flow equations at at least one discrete time point during a work cycle of the engine.

Abstract: Method and arrangement for operating an internal combustion engine (10) which can be operated in several modes of operation, especially an internal combustion engine (10) having direct injection (DE) or intake manifold injection (SRE) and with a control apparatus (11). The control apparatus (11) or its software has a plurality of functions (12) and a scheduler (13) for activating the functions (12). Operating modes are assigned to the functions (12) and the functions (12) are activated by the scheduler (13) in dependence upon the assigned modes of operation.

Abstract: An internal combustion engine is provided with an injection valve with which fuel can be injected directly into a combustion chamber either during a compression phase in a first operating mode or during an intake phase in a second operating mode. In addition, a control unit is provided for shifting between the two operating modes and for differentiated control and/or regulation of the performance quantities that influence the actual torque of the internal combustion engine as a function of a setpoint torque in both operating modes. A change in the actual torque during a shifting operation is determined by the control unit, and at least one of the performance quantities is influenced by the control unit as a function thereof.

Abstract: An internal combustion engine (1), especially of a motor vehicle, is described. The engine (1) is provided with a combustion chamber (4) into which fuel can be injected in a first operating mode during a compression phase and in a second operating mode during an induction phase. The engine (1) is provided with a control apparatus (18) for switching over between the operating modes. The engine (1) includes an exhaust-gas recirculation having an exhaust-gas recirculation valve (14). The engine (1) is switched by the control apparatus (18) into the first operating mode when the exhaust-gas recirculation valve (14) is jammed in the open state.

Abstract: A method and an apparatus operate a tank system including a tank system of a motor vehicle. The tank system includes a tank for receiving a fluid medium forming a volatile substance and an adsorption filter connected to the tank for receiving the volatile substance which emanates from the tank. A shutoff valve is connected to the adsorption filter and is electrically drivable between an open position and a closed position whereat the tank system is closed off pressure tight with respect to the ambient. A tank fill-level sensor detects the fill level of the fluid medium in the tank and transmits a signal indicative of the fill level of the fluid medium. A fill pipe is connected to the tank for filling the tank with the fluid medium. The fill level is detected while tanking the tank and the shutoff valve is driven into the closed position when the fill level has reached a maximum fill level. The shutoff valve can also be driven to close by applying a clocked drive signal thereto.

Abstract: A method for operating an internal combustion engine, for example, of a motor vehicle, in which a mixture of air and fuel is delivered from a tank by an activated carbon filter and by a tank venting valve to a combustion chamber. The tank venting valve is controlled in an open- and/or closed-loop fashion as a function of a tank gas evolution model and/or an activated carbon filter model.

Abstract: The present invention relates to a connection between two shaft ends (8, 10), situated coaxially one behind the other, of a gas exchange valve (1) of an internal combustion engine and a piston rod (2) of a valve actuator (4), where at least one coupling member (14) at least partially surrounds the shaft ends (8, 10).

Abstract: A control unit (50) makes a single control signal available for driving the through-flow control valves (TEV1, TEV2) (51, 52). Through-flow valve (TEV2) has a larger maximum through flow than through-flow control valve (TEV1). A delay circuit is indicated by the phantom outline (52′) and is mounted at the valve stage TEV2 (52). The delay circuit includes an electric delay element (53) with the aid of which the original control signal is delayed in time by an amount &Dgr;t1 relative to the control signal of control valve (TEV1). The resulting delayed signal is supplied to an AND-gate (54) together with the original control signal. Accordingly, a control signal is present at the output of the AND-gate for the control valve (TEV2). The time delay makes possible the exclusive activation of the through-flow control valve (TEV1) (51) at low pulse duty factors. In this way, a high small quantity meterability is achieved.

Abstract: The invention relates to a device of the build-up of pressure in supply systems (6, 11, 20, and 23) to components (19, 36) on internal combustion engines (2). The invention includes directly couples lubricant systems and pressure-generating systems (3, 8), an electric fuel pump (34), as well as a control apparatus for determining lubricant pressures. A supply module (12, 34) is provided with an independent drive (16) and supplies lubricant in the lubricant oil circuit (24) or to selected lubricating position, or fuel into a fuel supply (36). The supply module (12, 34) can optionally include a pressure converter (30).

Abstract: An internal combustion engine (10) has a plurality of cylinders which are arranged in two cylinder banks. A sensor (131, 132) is assigned to each of the two cylinder banks for determining the composition of the exhaust gas. A control apparatus is provided with which a control factor (fr1, fr2) can be determined for each of the two cylinder banks in dependence upon the output signals generated by the two sensors (131, 132). The fuel mass (ti1, ti2), which is to be injected into the two cylinder banks, can be influenced by the control factors. The two control factors (fr1, fr2) of the two cylinder banks can be compared to each other via the control apparatus. The control apparatus can distinguish between a cylinder-bank independent fault and a cylinder-bank dependent fault in dependence upon the two control factors (fr1, fr2).

Abstract: Described is an apparatus for rapid pressure buildup in a motor vehicle reservoir-type injection system (common rail) supplied with fuel by a high-pressure pump, the apparatus including a piston, which defines a pressure chamber that can be enlarged counter to the force of a spring element prestressed counter to the piston, which pressure chamber communicates with the feed pump and with the device supplied with the pressure medium. A locking device acting on the piston is provided, by which the piston can be locked in a locking position, assumed as a result of the pressure, built up in the pressure chamber by the feed pump, counter to the prestressing of the spring element and can be untensed after unlocking into a position that reduces the size of the pressure chamber. By the relaxation of the spring, the system pressure is built up suddenly.

Abstract: A fuel injection pump for internal combustion engines having at least one additional pump element for feeding fluid from a low-pressure side to a high-pressure side. With this fluid, a hydraulic valve controller of the engine can be driven.

Abstract: A method and a device for operating an internal combustion engine including a plurality of cylinders, determine whether a torque of the internal combustion engine is above a torque threshold value. If the torque is less than the torque threshold value, all the cylinders of the engine are operated in a lean operating state. If the torque is greater than or equal to the torque threshold value, a first number of cylinders of the engine is operated in a homogeneous operating state, and the remaining cylinders of the engine are operated in the lean operating state.

Abstract: A method and a device for controlling a gas fill of a plurality of cylinders in an internal combustion engine having variable valve timing, in which a detection signal of a filling sensor is sampled with a sampling rate. Furthermore, a detection interval is determined for one cylinder. The sampling values for ascertaining a sampling-value sum are added up within this detection interval. In addition, a number of sampling values within the first detection interval are counted for ascertaining a first count value. The air mass filled into the first cylinder is then ascertained by forming a quotient from the sampling-value sum and the count value.