Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
1999-07-01
2001-09-04
Dolinar, Andrew M. (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C123S333000, C123S350000
Reexamination Certificate
active
06285946
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a method and an arrangement for controlling the drive unit of a motor vehicle.
BACKGROUND OF THE INVENTION
A method and an arrangement for controlling the drive unit of a motor vehicle is known from U.S. Pat. No. 5,692,472. Here, a torque of the drive unit is controlled in dependence upon a desired value for this torque. To ensure the operational reliability of this control system, a maximum permissible torque of the drive unit is also formed and is compared to an actual torque of the drive unit and fault reaction measures are initiated when the actual torque of the drive unit exceeds the maximum permissible torque. In an embodiment described there, the maximum permissible torque is formed in dependence upon the desired torque value. This value, in turn, is computed on the basis of the position of an operator-controlled element, such as an accelerator pedal, which is operable by the driver, or is computed in dependence upon the desired torque pregiven by other control systems or control functions, for example, in dependence upon a desired torque of an engine drag torque control and/or of an idle rpm control. The maximum permissible torque is formed by means of a characteristic line or a characteristic field in dependence upon the desired torque value. There is no description of a consideration of the tolerances of the drive unit which, for example, are caused by internal friction. Furthermore, the permissible torque is dependent upon the driver command torque so that the permissible torque is likewise defective for a theoretically conceivable error in the computation of this torque.
SUMMARY OF THE INVENTION
It is an object of the invention to provide measures for monitoring an engine control on the basis of a maximum permissible torque via which this monitoring is optimized.
ADVANTAGES OF THE INVENTION
The monitoring of a control of a drive unit on a drive torque basis is significantly improved because tolerances are considered in the formation of the maximum permissible torque which is the basis of the monitoring. The tolerances are considered even when external interventions operate.
A formation of the maximum permissible torque, which is independent of the pedal characteristic, is achieved by the application of desired torques when forming the maximum permissible torque. The desired torques are pregiven by external functions. In this way, the torque monitoring while considering the tolerances is also then possible when external functions operate and the driver releases the pedal in the extreme case (for example, road speed control operation, engine drag torque control operation, et cetera).
Furthermore, it is advantageous that the driver command is not included in the computation of the permissible torque.
REFERENCES:
patent: 5457633 (1995-10-01), Palmer et al.
patent: 5499952 (1996-03-01), Huber et al.
patent: 5692472 (1997-12-01), Bederna et al.
patent: 02 024078 (1990-03-01), None
patent: 04 203251 (1992-11-01), None
patent: 09 229170 (1998-01-01), None
Dolinar Andrew M.
Ottesen Walter
Robert & Bosch GmbH
LandOfFree
Method and device for controlling a drive unit of a 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 Method and device for controlling a drive unit of a vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for controlling a drive unit of a vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2482279