Vehicle acceleration slip control system
First Claim
1. A vehicle acceleration slip control system comprising:
- a means for sensing a drive wheel speed of a vehicle;
a means for sensing a non-drive wheel speed of the vehicle;
an acceleration slip detecting means for detecting a drive wheel acceleration slip condition by comparing the drive wheel speed sensed by the drive wheel speed sensing means and the non-drive wheel speed sensed by the non-drive wheel speed sensing means;
a driving force reducing means for reducing a driving force of the vehicle;
an acceleration slip controlling means for performing a feedback control to control a driving force reduction quantity by commanding the driving force reducing means to restrain an acceleration slip when the acceleration slip detecting means detects the acceleration slip condition;
an acceleration slip predicting means for predicting an occurrence of a drive wheel acceleration slip of the vehicle;
a prediction controlling means for performing a feedforward control to prevent an occurrence of an acceleration slip by sending a command signal indicating an initial value of the driving force reduction quantity to said driving force reducing means when an occurrence of an acceleration slip is predicted by said acceleration slip predicting means, said initial value being a starting value used at a start of the feedforward control; and
a driving force reduction modifying means for modifying said initial value of said driving force reduction quantity in accordance with the acceleration slip condition sensed by said acceleration slip detection means during the prediction control of said prediction controlling means.
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Accused Products
Abstract
In order to prevent an acceleration slip in an early stage of acceleration even in starting, an acceleration slip control system has a predicting section for predicting an acceleration slip of a drive wheel of a vehicle, a prediction control section for determining an initial value of a driving force reduction quantity and decreases the driving force by increasing the driving force reduction quantity to the initial value to prevent an occurrence of an acceleration slip when the acceleration slip is predicted, and a modifying section for modifying the initially set driving force reduction quantity in accordance with a sensed actual slipping condition during a prediction control of the prediction control section.
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Citations
20 Claims
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1. A vehicle acceleration slip control system comprising:
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a means for sensing a drive wheel speed of a vehicle; a means for sensing a non-drive wheel speed of the vehicle; an acceleration slip detecting means for detecting a drive wheel acceleration slip condition by comparing the drive wheel speed sensed by the drive wheel speed sensing means and the non-drive wheel speed sensed by the non-drive wheel speed sensing means; a driving force reducing means for reducing a driving force of the vehicle; an acceleration slip controlling means for performing a feedback control to control a driving force reduction quantity by commanding the driving force reducing means to restrain an acceleration slip when the acceleration slip detecting means detects the acceleration slip condition; an acceleration slip predicting means for predicting an occurrence of a drive wheel acceleration slip of the vehicle; a prediction controlling means for performing a feedforward control to prevent an occurrence of an acceleration slip by sending a command signal indicating an initial value of the driving force reduction quantity to said driving force reducing means when an occurrence of an acceleration slip is predicted by said acceleration slip predicting means, said initial value being a starting value used at a start of the feedforward control; and a driving force reduction modifying means for modifying said initial value of said driving force reduction quantity in accordance with the acceleration slip condition sensed by said acceleration slip detection means during the prediction control of said prediction controlling means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A control system comprising:
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a wheel speed sensor group for sensing a drive wheel slipping condition of a vehicle; a throttle sensor for sensing a throttle condition of a throttle valve of an engine; and a controller for producing a first condition signal indicating an occurrence of a drive wheel acceleration slip by monitoring the driving wheel slipping condition, for producing a second condition signal indicating a prediction of a drive wheel acceleration slip by monitoring the throttle condition, for controlling a driving torque of the vehicle in a first control mode when the first condition signal is present and for controlling the driving torque of the vehicle in a second control mode when the second condition signal is present, the controller being configured to reduce the driving torque of the vehicle by a second mode reduction control quantity set to an initial value in response to the second condition signal and to vary the second mode reduction control quantity from the initial value in accordance with the drive wheel slipping condition. - View Dependent Claims (12, 13)
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14. A vehicle acceleration slip control system comprising:
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a first sensor configured to sense a drive wheel speed of a vehicle; a second sensor configured to sense a non-drive wheel speed of the vehicle; an acceleration slip detector communicatively coupled to the first and second sensors and configured to detect a drive wheel acceleration slip condition by comparing the drive wheel speed sensed by the first sensor and the non-drive wheel speed sensed by the second sensor; a driving force reducing unit configured to reduce a driving force of the vehicle; an acceleration slip controller communicatively coupled to the acceleration slip detector and the drive force reducing unit, the acceleration slip controller configured to perform a feedback control to control a driving force reduction quantity by commanding the driving force reducing unit to restrain an acceleration slip when the acceleration slip detector detects the acceleration slip condition; an acceleration slip predictor configured to predict an occurrence of a drive wheel acceleration slip of the vehicle; a prediction controller communicatively coupled to the acceleration slip predictor and the driving force reducing unit, the prediction controller configured to perform a feedforward control to prevent an occurrence of an acceleration slip by sending a command signal indicating an initial value of the driving force reduction quantity to the driving force reducing unit when an occurrence of an acceleration slip is predicted by the acceleration slip predictor, the initial value being a starting value used at a start of the feedforward control; and a driving force reduction modifying unit communicatively coupled to the acceleration slip condition detector and the prediction controller, the driving force reduction modifying unit configured to modifying the initial value of the driving force reduction quantity in accordance with the acceleration slip condition sensed by the acceleration slip detector during the prediction control of the prediction controller. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification