Daimler-benz Ag

Daimler Chrysler Ag

Daimler-benzaktiengesellschaft

Thomas Klaiber

Karl-Ernst Noreikat

Gerald Hornburg

Wolfram Fleck

Helmut Lorenz

Josef Sonntag

Bernd Riemer

Andreas Gaulhofer

Hans Braun

Kurt Maute

Dieter Kalweit

Wolfgang Hinrichs

Bernd Danner

Torsten Kroeger

Uwe Kleinecke

Thomas Brock

Adolf Kunzer

Alf Lehner

Christian Heiselbetz

In a method for setting the output power of an internal combustion engine a resultant specified torque is determined from a driver-intended torque and at least tw o additional intended torques, and the resultant specified torque is set via a apparatus for adjusting torque. Each participant system, in addition to the intended torque, provides information regarding whether the intended constitutes a torque-increase or a torque-decrease. A processing block is provided for each participant system in which the particular intended torque is compared with the driver-intended torque and the resulting specified torque of the preceding participant system. From this, a resulting specified torque is determined. The priority of the particular torque requirement results from the sequence of the participant systems during processing.

Method for controlling the output power of an internal combustion engine

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

An apparatus and method for starting a vehicle which is driven by an electric drive unit supplied with electrical energy from a fuel cell. A compressor is arranged in the feed line of the fuel cell for the oxidant mass flow and is driven by an electric motor supplied with voltage from the fuel cell itself. For the purpose of starting the fuel cell, a starter motor is provided for driving the compressor which is fed from a 12 V starter battery. In addition, a safety interrogation is initiated before starting the vehicle. The fuel cell is not run up to a prescribed no-load power with the aid of the starter motor until successful termination of the safety interrogation. The drive unit is then released after this no-load power has been reached.

Apparatus and method for starting a fuel cell vehicle

An arrangement of a drive unit in a vehicle, which drive unit comprises at least an electric traction motor, a fuel cell, a compressor for supplying air to the fuel cell and an electric motor for driving the compressor. According to the invention, the fuel cell is partitioned into at least two fuel-cell stacks which are fitted on opposite sides of the compressor. The electric motor, the compressor and a radiator fan are arranged on a common drive shaft.

Arrangement of a drive unit in an electric vehicle

A method and an apparatus are provided for controlling the power of an electric drive unit in a vehicle. The drive unit is supplied with electrical energy by a fuel cell in the vehicle. On the basis of a power request which is determined from the accelerator pedal position, the air flow rate required to provide the set power from the fuel cell is calculated and set by controlling rotational speed of a compressor arranged in the air intake line to the fuel cell. To prevent the fuel cell from producing more electrical power than the drive unit can absorb, the drive unit acts limits the power request by emitting appropriate error messages. The set value for the power is fed to the drive unit and can be corrected such that the drive unit never demands more power than the amount of power instantaneously produced by the fuel cell to prevent fuel cell collapse.

Method and device for vehicle fuel cell dynamic power control

An arrangement of a drive unit in a vehicle, having at least an electric traction motor, a fuel cell and a fuel tank. Two longitudinal beams situated at a distance from one another serve as supporting structure for the fuel-cell stack, which is mounted between the longitudinal beams in the underfloor region of the vehicle. Two transverse beams which extend at least over the region between the longitudinal beams may also be mounted at a distance from one another, so that a safety region is formed in which sensitive components of the drive unit can be protected against damage. The arrangement of individual components of the fuel-cell system in the underfloor region of the vehicle additionally provides the advantage that the passenger compartment or loading compartment can be of flat design.

A method and apparatus for the control of the continuously variable transmission ratio of a cone disk belt transmission in a motor vehicle with internal combustion engine, in which changes of the engine rotational speed are guided from actual to desired value specified by the drive pedal during the corresponding transmission change along a rotational speed change desired specified characteristic curve.

Method and apparatus for controlling the steplessly variable

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Weinstadt, Germany

Thomas Klaiber