Interrelated power delivery controls – including engine control – Plural engines – Electric engine
Patent
1999-10-29
2000-12-12
Wright, Dirk
Interrelated power delivery controls, including engine control
Plural engines
Electric engine
F16H 312, B60K 602, B60K 4122
Patent
active
061591270
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on a drive train for a motor vehicle as generically defined by the preamble to the main claim. In a drive train for a motor vehicle comprising a transmission, an internal combustion engine and a clutch disposed between them, the clutch in a gear change interrupts the traction force that is generated by the engine and transferred to the transmission. This fundamentally dictated loss of traction impairs driving safety and driving comfort.
ADVANTAGES OF THE INVENTION
The drive train according to the invention for a motor vehicle, having the characteristics of the body of the main claim, has the advantage over the prior art that in an interruption, dictated by a gear change, of the traction force of the engine by the clutch, a traction force is transferred by a device. This increases driving safety and comfort. It is especially advantageous to transfer the traction force via an electrical machine, and in particular a rotatably supported stator, with a rotor driven by the engine being set into a rotary motion. In that case, the courses of events can be regulated in an especially simple way by a controller. It is especially effective to couple this stator directly to a transmission output shaft. If the rotor is connected to a motor output shaft in a manner fixed against relative rotation, then there are no disadvantageous effects from possible slippage, for instance of a belt. If the rotor is connected to the output shaft of the engine via a fixed gear ratio, then a gear ratio adapted to the specific conditions of a particular drive train can be selected. If the electrical machine is also used to supply the on-board electrical system and/or for starting the engine, then conventional components previously required for these purposes can be dispensed with. If an additional stator and rotor are also integrated with the electrical machine, then the additional rotor can be used on the one hand to synchronize the rpm of the transmission input shaft and on the other for reinforcement during engine starting. For starting the engine, it is advantageous to block the transmission output shaft via a parking brake device. Disposing the electrical machine around the transmission input shaft is especially space-saving with regard to the radio installation space. A mechanical transmission with a variable gear ratio represents an especially sturdy version of a device for transferring a traction force.
DRAWING
One exemplary embodiment of the invention is shown in the drawing and described in further detail below. Shown are
FIG. 1, a symbolically represented drive train for a motor vehicle with an electrical machine;
FIG. 2, a drive train with a first modified electrical machine;
FIG. 3, a table showing various rotary speeds in rpm for the drive train with the first modified electrical machine; and
FIG. 4, a drive train with a second modified electrical machine.
DESCRIPTION
In the drawing, a drive train 10 for a motor vehicle is shown, which has an internal combustion engine 12 that is connected via an output shaft 14 to a clutch 16 for interrupting the traction force upon a gear change. The clutch 16 is adjoined, in alignment with the output shaft 14, by a ring gear 18. The ring gear 18 is connected solidly to an outer part of the clutch 16, and as a result the ring gear 18 is connected to the output shaft 14 of the engine 12 in a manner fixed against relative rotation. A transmission input shaft 20 is also disposed centrally to the ring gear 18. The transmission input shaft 20 is operationally connected to the clutch 16; that is, when the clutch 16 is engaged, a traction force can be transferred from the engine 12 to the transmission input shaft 20, and with the clutch 16 disengaged, the traction force generated by the engine 12 is interrupted.
Also disposed around the transmission input shaft 20 is a device that has an electrical machine 22. The electrical machine 22 substantially comprises a first rotor 24 and a first, rotatably supported stator 26 cooperating electromagnetically with
Bolz Martin-Peter
Loeffler Juergen
Robert & Bosch GmbH
Striker Michael J.
Wright Dirk
LandOfFree
Drive train for a motor vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive train for a motor vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive train for a motor vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-211426