Abstract: The invention relates to a method and an associated device for simulating the driving characteristics of a drive concept to be developed for a motor vehicle. The aim of the invention is to provide a method and an associated device for simulating the driving characteristics of a drive concept to be developed for a motor vehicle, using which the longitudinal dynamics and the energy requirements of designed concepts are simulated, compared with one another and validated during an actual driving operation. According to the invention, in order to simulate the driving characteristics of a drive concept to be developed for a motor vehicle during an actual driving operation for a production vehicle, the engine and transmission control are influenced by means of an additional control unit in such a way that the longitudinal dynamics of the production vehicle correspond to that of a designed hybrid drive.

Abstract: A method is for adjusting a fuel/air ratio by means of an on-off controller as well as a diagnostic method in which a desired fuel/air mixture is regulated in accordance with a test signal of a lambda probe that is embodied as a jump probe. The switching point of the on-off controller is moved/adapted while the oscillation of the test signal of the lambda probe is analyzed regarding the amplitude and/or the asymmetry of the oscillation around the switching point at a constant control stroke. A desired value for the asymmetry or the amplitude of the oscillation of the test signal of the lambda probe around the respective switching point is predefined, the switching point of the on-off controller being moved such that the desired value is reached.

Abstract: The invention relates to a method for diagnosing the degree of ageing of a catalyst arranged in the exhaust gas channel of an internal combustion engine, wherein the oxygen storage capacity of the catalyst is determined by means of the signals of a waste gas probe arranged upstream and downstream from the catalyst according to the OSC method when a rapid change occurs in the air/fuel ratios between a rich and lean mixture composition supplied to the internal combustion engine. The aim of the invention is to provide a method for determining the degree of ageing of a catalyst arranged in the exhaust gas channel of an internal combustion engine, wherein it is possible to ascertain the degree of ageing of a catalyst in a more accurate and more reliable manner, requiring little measurement effort.

Abstract: A method for controlling the drive power distribution in a motor vehicle with hybrid drive by controlling the drive power distribution of torques of an internal combustion engine and an electric motor on a common drive train of a motor vehicle with hybrid drive. The conversion of a reference moment to an actual moment takes place almost without delay, in the case of a load point shift and/or in the case of a change in the moment desired by the driver. The delay in the conversion of reference moments into actual moments is calculated in advance by means of a control device, and the electric motor is controlled by the control device in such a manner that the torque differences that occur due to the delay of the internal combustion engine are balanced out by the electric motor.

Abstract: A reciprocating-piston internal combustion engine has a crank drive and a transmission lever indirectly coupled with the piston and intersecting the cylinder axis. The lever is articulated onto the crank drive's connecting rod and onto an adjustable bearing guided in the cylinder block. For greater variation of the translation of movements between crank drive and piston, the pulling and pushing rod connected with the piston has a guide at its end facing the transmission lever. The guide is preferably a pivotally-mounted slide shoe that engages into a guide extending along the transmission lever. The transmission lever is pivotally connected with the crankshaft connecting rod and connected with a setting drive for variably setting the articulation of the pulling and pushing rod on the transmission lever. A guide lever pivotally connected with the pulling and pushing rod and pivotally articulated onto the cylinder block guides the pulling and pushing rod.

Abstract: Valve gears for load-change valves of four-stroke internal combustion engines, in which the load-change valves are closed by spring force, engage a pivot lever moved by a cam for opening a load-change channel. The cam engages an intermediate element that it is additionally moved by the lifting curve of the cam during a different work cycle, and adjusts the pivot lever to open the load-change valve slightly during a different work cycle. The intermediate element is prismatically guided on an element that can pivot in the cylinder head and is adjustable in its position, and engages the cam and the pivot lever, so that the stroke movement of the cam for opening the load-change valve via the pivot lever can be adjusted.

Abstract: A valve gear arrangement for load change valves of internal combustion engines has an intermediate element that is pivoted on a lever in the cylinder head, to activate the load change valves. The intermediate element engages a cam of a camshaft and has fork-shaped parallel guides on guide cylinders, over the center axis of which a guide groove in the shape of a circular ring segment extends. A roller axle of a roller that engages the cam is displaceably guided in the guide groove. There are springs supported on the roller axle that force the roller axle against an adjustable guide element, counter to the acting forces, when it passes through a plateau region of the cam, and lies against the plateau region.

Abstract: A variable valve gear for internal combustion engines, having at least one camshaft and pivot lever disposed in the cylinder head, which lever contacts a valve that closes by means of spring force. An intermediate element of a transfer element is mounted in a supporting and displaceable manner, twice on the supporting body and on the pivot lever. The intermediate element engages a supporting surface disposed on the supporting body, first by way of a supporting cam segment disposed on the intermediate element, and second with the controlling cam segment of the supporting body, and third with the pivot lever, by way of an outer contour surface disposed on the intermediate element. The intermediate element indirectly contacts the cam of the camshaft, by way of a roller disposed on an oscillating crank, which is connected with the intermediate element in articulated manner.

Abstract: A motor vehicle control system has at least two separate control units, which are interconnected via a bus system, each control unit controlling respective individual vehicle components. The control system effectively uses the memory location and computing time resources that exist within a combination of control units, thus assuring processing of the routines that can take place in real time. Use of the existing resources is assured without additional hardware expenditure.

Abstract: A valve drive for charge-cycling valves of internal combustion engines, which are held in the closed position by means of spring force, and can optionally be activated by a main cam or additionally by a secondary cam of a camshaft, in which connection the main cam with its elevation curve and angle setting is adapted to the crankshaft of a charge-cycling process to be controlled, and the secondary cam operates separately from the main cam. The drive variably controls an additional opening procedure of a charge-cycling valve, separate from the charge-cycling stroke to be controlled directly, in order to sensitively regulate the exhaust gas feed-back in this manner. The drive has two engagement surfaces for introducing movements on a pivot lever mounted on the cylinder head, which activates at least one charge-cycling valve.

Abstract: A system for variably actuating valves by means of cams for internal combustion engines has the following type of construction: A camshaft is rotationally supported in the cylinder head and has a fixed position in relation to the valves and their associated stroke-transmitting arrangements. A stroke-transmitting arrangement guided in a fixed position is associated with each of the valves arranged in the cylinder head and closes by means of spring force. A variable position element for adjusting the stroke of the valve is guided in a stationary manner in the cylinder head. An intermediate element is supported and pivotably guided on the variable position element. A cam of the camshaft is engaged by the intermediate element and is supported in a stationary manner in the cylinder head, as well as the stroke-transmitting arrangement associated with the valve.

Abstract: A device for displacing a cylinder block and cylinder head vs a crankcase. The cylinder block contains cylinders having an axis. In this case, the device comprises a plurality of bearing bridges extending across the cylinder block between the cylinders in a substantially straight line that is substantially perpendicular to the cylinder axis. In this case, each of the plurality of bearing bridges have a plurality of bearing passages. There are at least two setting shafts disposed in an upper region of the cylinder block in these bearing passages, and arranged in an alternating manner over a length of the crankcase. There are also a plurality of eccentrics which are coupled to the at least two setting shafts and supported on both sides of each of the cylinders. There are also a plurality of hollow support bars disposed in the cylinder block below the receiving bores.

Abstract: An actuating drive for valve drives having a variably adjustable stroke, for actuating valves of internal combustion engines is provided, which can be arranged in cylinder heads having usual dimensions, next to the valve activation mechanisms, in advantageous manner. The element that is changeable in its angle position is provided with a guide toggle coupled in fixed rotational manner, which is in engagement with an actuating shaft arranged adjacent to it, guided in the cylinder head in displaceable manner. This actuating slide has an actuating bridge in the region of the actuating path, with which contact surfaces of the actuating lever are engaged on one or both sides. The actuating slide is coupled with an actuating motor, which effects the axial actuating movements of the actuating slide counter to the forces introduced by the actuating lever.

Abstract: An actuating drive for valve drives having a variably adjustable stroke, for actuating valves of internal combustion engines is provided, which can be arranged in cylinder heads having usual dimensions, next to the valve activation mechanisms, in advantageous manner. The element that is changeable in its angle position is provided with a guide toggle coupled in fixed rotational manner, which is in engagement with an actuating shaft arranged adjacent to it, guided in the cylinder head in displaceable manner. This actuating slide has an actuating bridge in the region of the actuating path, with which contact surfaces of the actuating lever are engaged on one or both sides. The actuating slide is coupled with an actuating motor, which effects the axial actuating movements of the actuating slide counter to the forces introduced by the actuating lever.