Daimler Chrysler Ag

Mercedes-benz Aktiengesellschaft

Dieter Kalweit

Sven Merkle

Tobias Roulet

Kurt Maute

Thomas Klaiber

Peter Klein

Anton Waltner

Peter Lautenschutz

Uwe Kleinecke

Ralf W&ouml;rner

Ralf Woerner

Herwig Biesinger

Andrej Panten

Christian Heiselbetz

Heiko Flebbe

In a method for determining the torque of the crankshaft of an internal combustion engine, the intake work of the cylinder in the respective working cycle during the intake period, the compression work of the cylinder in the respective working cycle during the compression period, the combustion work of the cylinder in the respective working cycle during the combustion period and the expulsion work of the cylinder in the respective working cycle during the exhaust period are determined, and the work on the crankshaft in the respective working cycle is determined therefrom.

Method for determining the torque on the crankshaft of an internal combustion engine

In a method for controlling an internal combustion engine by means of interventions in at least one manipulated variable of the internal combustion engine, a setpoint torque or work which is to be performed is determined at the crankshaft of the internal combustion engine, wherein, with respect to a first variable as work which is to be performed or a setpoint torque to be provided, a corresponding setpoint quantity of heat is determined taking into account the instantaneous actual efficiency, with respect to which at least one associated manipulated variable is set in accordance with the value of the set-point quantity of heat, and, for precise setting of the torque, the actual quantity of heat also being sensed, a setpoint efficiency being determined from the actual quantity of heat taking into account work which is to be performed or a setpoint torque which is to be provided, this can correspond to the first variable or to another variable which is formed as a setpoint torque or work which is to be performed at the crankshaft, and at least one manipulated variable of the internal combustion engine is set approximately simultaneously in accordance with a setting of the setpoint efficiency.

Method for controlling an internal combustion engine

In a method for setting an intake manifold pressure or a mass volumetric efficiency of an internal combustion engine, a change in the setting of the engine throttle valve when needed during operation of the engine is increased beyond the desired setting by such an amount and for such a period of time that the change in the setting of the throttle valve corresponds at least approximately to the air mass flow rate which is required in order to set the internal combustion engine to the new load state.

Method of controlling an internal combustion engine

An electronic control device for the optional control of various types and operating modes of internal combustion engines includes a calculation device configured to calculate the respectively required manipulated quantities, including at least the manipulated variable (Ti) for the predetermination of the fuel quantity to be injected and the manipulated variable (&agr;) for the predetermination of the throttle valve position of the throttle valve in the intake pipe, dependent on respectively required input parameters, including at least the desired quantity of heat (WM). A switchover device is configured to allocate, dependent on the operating mode, the respectively required input parameters and/or quantities derived therefrom as input quantities for the respectively required calculation device. A single type of control device may be manufactured, in large piece counts and with simplified warehousing, for variable possibilities of application. The adaptation to the respective type of engine or operating mode may occur through simple adaptation with the aid of a switchover device.

Electronic control device for optional controlling of different types and operating modes of internal combustion engines

A method and control apparatus for the correction of a mathematically determined torque in the drive train of a motor vehicle, in which a recognition signal for distinguishing between automatic and manual transmissions is produced and motor and transmission operating states (selected in accord with the recognition signal) in which the actual torque applied to the crankshaft is equal to zero are established. When the motor and transmission operating states are reached, the mathematically determined torque associated with the operating states is compared to the actual (zero) torque, and the difference between the mathematically determined torque and the actual torque is used as a control factor for the correction of additional computed torques.

Method and motor control apparatus for the correction of a computer-established torque in the drive train of a motor vehicle

The invention relates to a method for adjusting the drive performance of a motor vehicle having an internal combustion engine with spark ignition. A set torque is determined on the basis of a desired torque which is input by the driver, and possibly additional desired torque requirements. The desired torque is achieved by influencing the load and/or the ignition angle. For this purpose, the invention distinguishes between three operating states. In a first operating state, the torque is adjusted with optimum efficiency by load regulation; in a second operating state the torque adjustment is made as rapidly as possible by an additional ignition angle adjustment. Finally, in the third operating state the torque specification for load regulation is established and the remaining torque adjustment is made by an additional ignition angle adjustment.

Method for adjusting the operating energy input of a motor

A method of detecting defective ignition or fuel injection system of an internal combustion engine with several cylinders and at least two spark plugs or two fuel injection devices per cylinder with separate control circuits, at least a second control circuit for the ignition or fuel injection systems is disabled so that all the spark plugs or injection devices of the at least second ignition or injection systems become inoperative, the engine running smoothness is then measured, the first system which was not disabled is identified as including the defective spark plug or injection device if the engine running smoothness was found to be affected, then the ignition or injection systems for any other spark plugs or injection devices are disabled cylinder-by-cylinder and the engine running smoothness is monitored to identify the cylinder which includes the defective spark plug or injection device.

Method for recognizing defective ignition or injection system in

The invention provides a method for shutting down and restarting individual cylinders of a multicylinder internal combustion engine by deactivating the charge change valves and the fuel injection. According to the invention, in shutting down a selected cylinder, the exhaust valve is disconnected first in all cases. Thereafter, the intake valve and fuel injection for the selected cylinder are controlled such that the last fuel injection into that cylinder takes place immediately before the last intake cycle. When a cylinder is restarted, the exhaust valve is always operated first, and only thereafter is the intake valve opened, with the first fuel injection always taking place immediately before the first intake cycle.

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Schorndorf, Germany

Dieter Kalweit