Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
1998-10-16
2001-05-08
Chin, Gary (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C701S001000, C180S197000
Reexamination Certificate
active
06230092
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a method and an arrangement for controlling the drive unit of a vehicle.
BACKGROUND OF THE INVENTION
A method and an arrangement of this kind are known from DE-A-43 21 333. There, the rate of change of the speed of the torque buildup of the drive unit is limited in specific operating situations. The operating situation which is of primary importance is the transition from the overrun phase of the vehicle to the traction phase when the driver actuates the accelerator pedal. Unpleasant vibrations of the drive train of the vehicle are avoided by limiting the torque buildup of the drive unit. The limiting is here pregiven as a compromise between the vibration-reducing effect, on the one hand, and the desire to make available the torque desired by the driver with the least possible delay.
From DE-A1 28 04 444 (GB-A 20 13 937), it is known to limit the change of the duration of the fuel injection pulses. From DE-A1 41 07 115 (GB-A 22 53 440), it is known to limit the torque change during the transition from overrun operation to traction operation by an adjustment of the ignition angle in order to counter vibrations in this way. Furthermore, it is known from EP-B 441 393 (U.S. Pat. No. 5,209,203), to intervene in the torque of the drive unit for damping vibrations in the drive train in the sense of reducing the difference with the intervention being in dependence upon the difference between wheel rpm and engine rpm.
The functions illustrated in the above-mentioned documents are only examples for limiting the torque change. These functions are utilized individually or in any desired combination or in modified form in dependence upon the application. In the following, these functions and functions having comparable effect but deviating configuration are taken together as limitations of the torque change of the drive unit.
These limitations have in common that the limiting action is the result of a compromise between avoiding jolting vibrations and the desire to make available the torque with the least possible delay. The limitation in the provided operating situation is always active.
SUMMARY OF THE INVENTION
It is an object of the invention to provide measures which optimize the driving performance of a vehicle with respect to a torque change.
The driving performance of a vehicle is optimized with respect to the torque change of the drive unit with the solution according to the invention.
It is especially advantageous that, for the control of the drive unit, at least one function is influenced in accordance with the behavior of the driver. This function limits the torque change of the drive unit at least in one operating state.
It is especially advantageous that the behavior of the driver is derived from the driving performance of the transmission control (sport, economy, etc.) or from the type of driver determined by the transmission control. The driving performance is adjusted by the driver. In this way, the engine control controls the torque buildup in correspondence to the type of driver pregiven by the driver.
In this way, the torque buildup of an internal combustion machine is controlled in an advantageous manner to correspond to the behavior of the driver so that the driving performance of the vehicle is adapted to the driver.
It is especially advantageous that the driver actively has the possibility to determine the buildup of the torque and therefore the driving performance of the vehicle.
With the solution according to the invention, it is made possible that a rapid torque buildup as well as a comfortable smooth torque buildup is realized in dependence upon the type of driver.
In addition, it is advantageously possible with the winter key (which is present in transmission controls) to configure the torque buildup so smoothly that the tendency of the wheels to rotate without traction is reduced for a corresponding friction value.
A further advantageous supplement is that information as to a control intervention into the brake system of the vehicle is evaluated and is transmitted to the engine control so that the torque change is slowed by the engine control. The information is supplied by a control unit controlling the drive slip of a vehicle. The disturbing, rapid torque change during intervention into the drive slip control is avoided.
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Becker Rudiger
Hörrmann Oliver
Chin Gary
Ottesen Walter
Robert & Bosch GmbH
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