Method for controlling an acceleration slip of a vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTakafumi Inagaki
Life of this patent
Estimating the term…
Abstract
An acceleration slip control method quickly terminate an acceleration slip control when it is no longer necessary. A quick detection of the termination adopts, as terminating conditions, a preset time duration of reduction of drive wheel brake force and reduction of the drive wheel slip rate. The quick termination of the acceleration slip control enables immediate voluntary acceleration and better maneuverability of the vehicle.
Claims8
A method for controlling a slip between a drive wheel of a vehicle and a road surface during acceleration, comprising the steps of:
- detecting a slip rate of the drive wheel;
- determining whether the detected slip rate is greater than a first preset value;
- starting a slip control for reducing the slip rate when the detected slip rate is determined to be greater than the first preset value, the slip control including at least actuating a brake system of the drive wheel;
- determining whether a brake force is less than a predetermined value;
- determining whether the detected slip rate is less than a second preset value after said brake system is actuated, the second preset value being less than the first preset value;
- and
- terminating the slip control after a preset time period during which the detected brake force is determined to be less than the predetermined value and the detected slip rate is determined to be less than the second preset value.
A slip controller for a vehicle for controlling a slip between a drive wheel of the vehicle and a road surface during acceleration, comprising:
- means for detecting a slip rate of the drive wheel;
- means for determining whether the detected slip rate is greater than a first preset value;
- a drive wheel brake system;
- means for detecting the brake force of the drive wheel;
- means for determining whether the detected brake force is less than a predetermined value;
- and
- control means for starting a slip control for reducing slip rate when the detected slip rate is determined to be greater than the first preset value, using at least the brake system of the drive wheel, and for terminating the slip control after a preset time period during which the detected brake force is determined to be less than the predetermined value and the detected slip rate is determined to be less than a second preset value, the second preset value being less than the first preset value.
Dependencies are inferred from the claim text.