Mercedes-benz Aktiengesellschaft

Daimler Ag

Peter Antony

Wolf Boll

Herbert Botzelmann

Michael Buck

Bernd Falkenmayer

A method for controlling a drive () of a motor vehicle having an internal combustion engine () and an electric motor (). A main transmission () having an output shaft () is connected to a driveshaft () of the motor vehicle, and an input shaft () is connected to the internal combustion engine (). The electric motor () is coupled to the input shaft () or the output shaft () of the main transmission () by an intermediate transmission () having at least two transmission ratio steps. In order to accelerate the motor vehicle from rest, the drive is initially effected solely by the electric motor () with the intermediate transmission () in its lowest transmission ratio step. The drawing is then taken over by the internal combustion engine () before a shift operation in the intermediate transmission (). In this case, the intermediate transmission () is preferably a claw shift transmission.

Method for controlling a drive of a hybrid vehicle

In a process and apparatus for braking a hybrid drive vehicle, kinetic vehicular energy is converted by the driving electric motor into electrical power, which alternatively can be absorbed by charging a traction battery or by driving a combustion engine via a generator coupled to the engine, which is functioning as a motor. According to the invention, engine braking is activated if the traction battery is fully charged, if its temperature lies outside a predetermined charging temperature range, or if the charging current due to the electrical power supplied by the driving electric motor exceeds a predetermined limit value.

Process and apparatus for braking a hybrid-drive motor vehicle

The hybrid drive arrangement according to the invention has a thermal engine that can be operated on a fuel containing hydrocarbons and capable of generating hydrogen. A storage device is provided for the fuel, with an energy storage device for the energy generated by the thermal engine. A drive motor is supplied, depending on the operating state, by the energy from the thermal engine and/or the energy storage device, as well as a method for operation thereof. A hydrogen-generating unit connected to receive fuel from the fuel storage and generates hydrogen from the fuel. The thermal engine is designed for optional operation on the fuel that can be supplied from the storage device or on the hydrogen that is generated. According to the method, the thermal engine is operated in a higher driving load range on the fuel containing the hydrocarbons and on the hydrogen in a lower driving load range, as well as during starting and warmup, at a stationary emission-minimizing operating point, with any remaining power requirement being covered by the energy storage device.

Hybrid drive and operating method therefor

The invention provides a hybrid drive arrangement, particularly for a motor vehicle, having an internal combustion engine, a generator, a rectifier, an inverter, an energy accumulator connected to the direct current line between the rectifier and the inverter as well as a driving motor coupled to the inverter. A bypass line bridges the rectifier--direct-current line--inverter path, and a switching element is provided to couple the driving motor with the generator selectively by way of the rectifier--direct-current line--inverse rectifier path on the one hand, or the bypass line on the other.

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Lorch, Germany

Peter Antony