Robert Boschgmbh

Audi Ag

Bernhard Vogt

Michael Baeuerle

Werner Hess

Thomas Wenzler

Achim Guenther

Herbert Meyer

Georg Geywitz

Manfred Hundhausen

Michael Muhler

In a motor vehicle having a manual transmission, for, in particular, limiting the engine speed during the start-up operation when fulfilling at least one permission criterion for the engine torque, the criterion depending on the driving state of the motor vehicle, a default engine torque is preset, which is specified according to at least one engine characteristic value and which can be reduced with regard to the set engine torque called for by the position of the accelerator pedal of the motor vehicle.

Method for controlling the engine of a motor vehicle having a manual transmission

An internal combustion engine () is operated by a method wherein the fuel is supplied via a magnetic valve () having a coil (). The injected fuel quantity is influenced by the duration of the drive of the magnetic valve (). In the method, the temperature (evtmod) of a region () of the magnetic valve () is determined and the drive duration is corrected in dependence upon temperature. In order to make the correction still more precise, a temperature (evtmod) of the magnetic valve () is determined from at least one usually measured temperature (tans, tmot) and the drive duration (ti_tvu_w) is so corrected (tvsp_w) that the temperature dependency of the characteristics of the magnetic coil () of the magnetic valve () is considered. Furthermore, a model is suggested in which (starting from an operating temperature) the temperature trace is simulated after shut-off of the engine and/or for the restart of the engine by means of two factors for the warmup and cool down.

Method, device and computer program for operating an internal combustion engine, and internal combustion engine

In a method for operating an internal combustion engine (), the fuel is supplied via at least one injection valve (). The injected fuel quantity is influenced by the injection duration (ti). To reduce costs for the design and acquisition of the injection valve (), it is proposed to detect as to whether a requested injection duration (ti) of the injection valve () is greater than a maximum possible injection duration (timxth). In this case, an intervention () takes place with which a desired mixture composition (rlmaxti) is produced.

Method, computer program and control arrangement for operating an internal combustion engine

In the boost pressure control system there is generated, from the system deviation between a reference boost pressure and an actual boost pressure, a manipulated variable for an actuator that acts on the exhaust flow guided through the turbine of an exhaust-driven turbocharger. To allow the boost pressure control system to operate over a wide working range without allowing the control action to become too slow or allowing control overshoots to occur, the manipulated variable, or one or more other variable(s) constituting the manipulated variable, is/are transformed in a characteristics map into values such that after transformation, a linear correlation exists between the manipulated variable and the controlled variable.

Method for boost pressure control of an internal combustion engine

A method for operating an internal combustion engine of a motor vehicle with the engine developing a torque during the operation thereof includes deriving a desired value of the torque of the engine from operating variables. The desired value of the torque is made available by at least adjusting the air supply and the ignition angle of the engine. The efficiency of the engine is deteriorated in at least one operating state of the engine compared to the efficiency in operating states outside of the one operating state by retarding the ignition angle and increasing the air supply whereby the torque developed by the engine remains essentially constant. The presence of the one operating state is detected when a startup intent of the driver of the vehicle is recognized.

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Boeblingen, Germany

Bernhard Vogt