Curve-dependent engine drag-torque control
AssigneeRobert Bosch GmbH
InventorThomas Sauter
Life of this patent
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Abstract
An engine drag-torque control, particularly for motor vehicles, in which the engine torque is increased by an EDC augmenting torque when the driven wheels drop below a slip threshold due to the braking action of the engine and exhibit a brake slip which is too high. To improve the vehicle control during cornering on a roadway having a low coefficient of friction, it is provided to increase the slip threshold for the driven wheels to thereby set the drag-torque control to be more sensitive.
Claims11
An engine drag-torque control for a motor vehicle comprising:
- means for detecting curves and coefficients of friction;
- and
- an arrangement for increasing the torque of an engine when at least one driven wheel falls below a slip threshold due to a braking action of the engine, the arrangement increasing the slip threshold for at least one driven wheel in response to cornering on a roadway having a low coefficient of friction.
A method for engine drag-torque control for a motor vehicle, the engine torque being increased when at least one driven wheel drops below a slip threshold due to a braking action of the engine and exhibits a brake slip which is too high, the method comprising:
- determining whether the vehicle is cornering;
- ascertaining a coefficient of friction of a roadway;
- and
- raising the slip threshold for at least one driven wheel if cornering was detected on a roadway having a low coefficient of friction.
Dependencies are inferred from the claim text.