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US 6,863,140 B2Granted
Motor vehicle drive arrangement
AssigneeDaimlerChrysler AG
InventorsKarl-Ernst Noreikat, Tobias Ostertag, Lars Saroch
Life of this patent
Estimating the term…
Abstract
A motor vehicle drive arrangement has a locomotive drive train and at least one liquid pump capable of being driven by the latter. During a standstill in rotation or during very slow rotation of the locomotive drive train, the pump is capable of being driven by an electric motor instead of by the locomotive drive train. Beyond a defined minimum rotational speed of the locomotive drive train, the liquid pump is capable of being driven by the latter instead of by the electric motor. At least one free-wheel is provided for this purpose.
Claims22
A motor vehicle drive arrangement, comprising:
- a locomotive drive train for transmission of drive torque from a locomotive drive engine to a locomotive drive transmission;
- at least one liquid pump for supplying at least one drive part with operating liquid;
- a first pump drive connection from a rotary part of the locomotive drive train to the liquid pump, the rotary part of the locomotive drive train being a drive shaft which is drive-connected or drive-connectable to the locomotive drive transmission;
- an electrical machine capable of being operated as an electric motor, having a rotor which is drive-connected or drive-connectable to the liquid pump by way of a second pump drive connection, and arranged so as at least partially to overlap the liquid pump;
- a first free-wheel in the first pump drive connection, the liquid pump being capable of being driven by the electric motor by way of the second pump drive connection more rapidly than by the rotary part of the locomotive drive train, without the rotary part being passively taken up;
- a second free-wheel in the second pump drive connection, so that the liquid pump can be driven more rapidly by the rotary part than by the electric motor, without the rotor of the electric motor being passively taken up;
- wherein the first free-wheel surrounds the drive shaft coaxially and has a free-wheel part connected fixedly in terms of rotation to the latter;
- wherein a hollow intermediate shaft, through which the drive shaft extends axially, is provided;
- wherein each of a further free-wheel part of the first free-wheel and a free-wheel part of the second free-wheel is connected fixedly in terms of rotation to the intermediate shaft, and
- wherein a further free-wheel part of the second free-wheel is connected fixedly in terms of rotation to the rotor of the electric motor so that, according to a free-wheel principle, each of the free-wheel parts free-wheel drives the other in one direction of relative rotation and does not drive the other in an opposite direction of relative rotation.
7 more elements
A motor vehicle drive arrangement, comprising:
- a locomotive drive train for transmission of drive torque from a locomotive drive engine to a locomotive drive transmission;
- at least one liquid pump for supplying at least one drive part with operating liquid;
- a first pump drive connection from a rotary part of the locomotive drive train to the liquid pump, the rotary part of the locomotive drive train being a drive shaft which is drive-connected or drive-connectable to the locomotive drive transmission;
- an electrical machine capable of being operated as an electric motor and having a rotor which is drive-connected or drive-connectable to the liquid pump by way of a second pump drive connection;
- a first free-wheel in the first pump drive connection, the liquid pump being capable of being driven by the electric motor by way of the second pump drive connection more rapidly than by the rotary part of the locomotive drive train, without the rotary part being passively taken up;
- a second free-wheel in the second pump drive connection, so that the liquid pump can be driven more rapidly by the rotary part than by the electric motor, without the rotor of the electric motor being passively taken up;
- wherein the first free-wheel surrounds the drive shaft coaxially and has a free-wheel part connected fixedly in terms of rotation to the latter;
- wherein a hollow intermediate shaft, through which the drive shaft extends axially, is provided;
- wherein each of a further free-wheel part of the first free-wheel and a free-wheel part of the second free-wheel is connected fixedly in terms of rotation to the intermediate shaft,
- wherein a further free-wheel part of the second free-wheel is connected fixedly in terms of rotation to the rotor of the electric motor so that, according to a free-wheel principle, each of the free-wheel parts free-wheel drives the other in one direction of relative rotation and does not drive the other in an opposite direction of relative rotation, and
- wherein the liquid pump is arranged so as to surround the drive shaft coaxially.
8 more elements
Dependencies are inferred from the claim text.