Robert Boschgmbh

Frank Steuernagel

Manfred Hellmann

Alexander Maass

Thorsten Juenemann

Jens-Werner Falkenstein

Rene Schenk

Andreas Seel

Karsten Kroepke

Christian Muehlbauer

Martin Lang

Peter Khatchikian

Boyke Richter

Markus Vogelgesang

Peter Deuble

Sasha Dreschmann

Sascha Dreschmann

A hybrid drive system for a motor vehicle includes an internal combustion engine and at least one electric motor, each driving wheels of the motor vehicle. The internal combustion engine is coupled to the corresponding wheels via a first multispeed transmission. The electric motor is coupled to the corresponding wheels via a second multispeed transmission.

Hybrid drive system

A method and a device for operating a hybrid vehicle, which ascertain the torque necessary for starting the non-operating internal combustion engine, and this torque is reserved by an additional drive unit. The torque necessary for starting the non-operating internal combustion engine is minimized by appropriately adjusting parameters of the internal combustion engine system.

Method and device for operating a hybrid drive for a vehicle

A method for determining the beginning of a start phase of an internal combustion engine in a hybrid vehicle, in which a second drive unit drives the hybrid vehicle, the internal combustion engine being started upon reaching a certain drive torque of the second drive unit. In order to always be able to achieve the maximum solely electric driving range of the hybrid vehicle using the second drive unit and simultaneously improve the driving comfort of the hybrid vehicle by optimizing the internal combustion engine start triggering, the internal combustion engine is started when a predicted drive torque of the second drive unit is less than or equal to the drive torque, as instantaneously measured and increased by a torque reserve, of the second drive unit.

Method and device for determining the beginning of a start phase of an internal combustion engine in a hybrid vehicle

A hybrid drive () of a motor vehicle (). In the motor vehicle (), an electric motor () acts as the driving force on a first axle () and an internal combustion engine () as a driving force on a second axle (). In an operation, in which only the electric motor () acts on the first axle (), a check is made to determine whether the internal combustion engine () is to be started to drive the second axle (), wherein a first set of conditions for a road start, taking into account first criteria, and a second set of conditions for a starter motor start, taking into account second criteria, are defined and checks are made independently of one another to determine whether the first set of conditions for a road start or the second set of conditions for a starter motor start has been met.

Method for operating a hybrid drive

A method and a device for determining, ascertaining and predicting at least one starting torque or starting torque characteristic curve required for starting an internal combustion engine for a vehicle, especially a hybrid vehicle having at least one internal combustion engine and at least one additional motor. The determination and the ascertainment of the starting torque or the starting torque characteristic curve are carried out during the operation of the vehicle. A method for operating at least one motor in a hybrid vehicle is also described.

Method and device for determining and predicting a starting torque or a starting torque characteristic curve required for starting an internal combustion engine

A method is described for starting an internal combustion engine having an E-machine coupled to it in a motor vehicle, after the input of a certain torque command at a drive control of the internal combustion engine, the internal combustion engine being accelerated for the start by the E-machine, and the internal combustion engine being set by the drive control, via actuators, to specified characteristics values for the start. To reduce exhaust gas emissions at the start of the internal combustion engine, the internal combustion engine is accelerated by the E-machine, without the injection of fuel, until the engine torque that is able to be implemented by the internal combustion engine, essentially corresponds to the torque command, and the injection of fuel into the internal combustion engine is only then released.

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Stuttgart, Germany

Frank Steuernagel