Traction control apparatus
First Claim
Patent Images
1. A traction control apparatus comprising:
- driving wheel velocity detecting means for detecting a driving wheel velocity of a vehicle;
driven wheel velocity detecting means for detecting a driven wheel velocity of the vehicle;
reference velocity setting means for setting a reference velocity on the basis of an output from said driven wheel velocity detecting means;
slip value detecting means for detecting a slip value of the driving wheel on the basis of a difference between an output from said driving wheel velocity detecting means and an output from said reference velocity setting means;
lateral acceleration detecting means for detecting a lateral acceleration generated in a widthwise direction of the vehicle; and
target engine torque setting means for setting a target output torque of an engine of the vehicle in accordance with an output from said slip value detecting means, wherein said target engine torque setting means comprises travel acceleration detecting means for detecting a travel acceleration of the vehicle, reference drive torque setting means for setting a reference drive torque in accordance with an output from said travel acceleration detecting means, target output torque setting means for setting the target output torque of the engine in accordance with an output from said reference drive torque setting means, correction torque setting means for setting a correction torque in accordance with an output from said slip value detecting means, target output torque correcting means for correcting the target output torque in accordance with an output of said correction torque setting means, and correction torque changing means for changing the correction torque in accordance with an output from said lateral acceleration detecting means.
1 Assignment
0 Petitions
Accused Products
Abstract
A driving and driven wheel velocity are detected by wheel velocity sensors. A reference velocity is set on the basis of the driven wheel velocity. A slip value of the driving wheel on the basis of a difference between the driving wheel velocity and reference velocity. A target output torque of an engine is set in accordance with the slip value of the driving wheel. The target output torque is corrected in accordance with a lateral acceleration generated in a widthwise direction of the vehicle. An output of the engine is controlled to reach the corrected target output torque.
36 Citations
17 Claims
-
1. A traction control apparatus comprising:
-
driving wheel velocity detecting means for detecting a driving wheel velocity of a vehicle; driven wheel velocity detecting means for detecting a driven wheel velocity of the vehicle; reference velocity setting means for setting a reference velocity on the basis of an output from said driven wheel velocity detecting means; slip value detecting means for detecting a slip value of the driving wheel on the basis of a difference between an output from said driving wheel velocity detecting means and an output from said reference velocity setting means; lateral acceleration detecting means for detecting a lateral acceleration generated in a widthwise direction of the vehicle; and target engine torque setting means for setting a target output torque of an engine of the vehicle in accordance with an output from said slip value detecting means, wherein said target engine torque setting means comprises travel acceleration detecting means for detecting a travel acceleration of the vehicle, reference drive torque setting means for setting a reference drive torque in accordance with an output from said travel acceleration detecting means, target output torque setting means for setting the target output torque of the engine in accordance with an output from said reference drive torque setting means, correction torque setting means for setting a correction torque in accordance with an output from said slip value detecting means, target output torque correcting means for correcting the target output torque in accordance with an output of said correction torque setting means, and correction torque changing means for changing the correction torque in accordance with an output from said lateral acceleration detecting means. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A traction control apparatus comprising:
-
driving wheel velocity detecting means for detecting a driving wheel velocity of a vehicle; driven wheel velocity detecting means for detecting left and right driven wheel velocities of the vehicle; reference velocity setting means for setting a reference velocity on the basis of an output from said driven wheel velocity detecting means; slip value detecting means for detecting a slip value of the driving wheel on the basis of a difference between an output from said driving wheel velocity detecting means and an output from said reference velocity setting means; target engine torque setting means for setting a target output torque of an engine of the vehicle in accordance with an output from said slip value detecting means; lateral acceleration detecting means comprising a lateral acceleration sensor for directly detecting the lateral acceleration generated in the widthwise direction of the vehicle, lateral acceleration calculating means for calculating the lateral acceleration on the basis of the output from said driven wheel velocity detecting means, failure detecting means for detecting a failure of said lateral acceleration sensor, and lateral acceleration switching means for, when said failure detecting means detects said failure, outputting the output of said lateral acceleration calculating means as the lateral acceleration in place of an output from said lateral acceleration sensor; and target engine torque correcting means for correcting the target output torque in accordance with an output from said lateral acceleration switching means. - View Dependent Claims (7, 8)
-
-
9. A traction control apparatus comprising:
-
driving wheel velocity detecting means for detecting a driving wheel velocity of a vehicle; driven wheel velocity detecting means for detecting a driven wheel velocity of the vehicle; reference velocity setting means for setting a reference velocity on the basis of output from said driven wheel velocity detecting means; slip value detecting means for detecting a slip value of the driving wheel on the basis of a difference between an output from said driving wheel velocity detecting means and an output from said reference velocity setting means; target engine torque setting means for setting a target output torque of an engine of the vehicle in accordance with an output from said slip value detecting means; lateral acceleration detecting means for detecting a lateral acceleration generated in a widthwise direction of the vehicle which comprises, vehicle velocity detecting means for detecting a travel velocity of the vehicle, and lateral acceleration correcting means for correcting the lateral acceleration in accordance with an output from said vehicle velocity detecting means; and target engine torque correction means for correcting the target output torque in accordance with an output from said lateral acceleration detecting means. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A traction control apparatus comprising:
-
driving wheel velocity detecting means for detecting a driving wheel velocity of a vehicle; driving wheel velocity detecting means for detecting a driven wheel velocity of the vehicle; reference velocity setting means for setting a reference velocity on the basis of an output from said driven wheel velocity detecting means; slip value detecting means for detecting a slip value of the driving wheel on the basis of a difference between an output from said driving wheel detecting means and an output from said reference velocity setting means; target engine torque setting means for setting a target output torque of an engine of the vehicle in accordance with an output from said slip value detecting means; lateral acceleration detecting means for detecting a lateral acceleration generated in a widthwise direction of the vehicle; and target engine torque correcting means for correcting the target output torque in accordance with an output from said lateral acceleration detecting means which comprises first correction value setting means for setting a first correction value which changes in accordance with the output from said lateral acceleration detecting means, lateral acceleration changing value calculating means for calculating a changing value of the lateral acceleration as a function of time, second correction value setting means for setting a second correction value which changes in accordance with an output from said lateral acceleration changing value calculating means, and slip value correcting means for correcting the target output torque by correcting the slip value in accordance with outputs from said first and second correction value setting means.
-
-
16. A traction control apparatus comprising:
-
driving wheel velocity detecting means for detecting a driving wheel velocity of a vehicle; driven wheel velocity detecting means for detecting a driven wheel velocity of the vehicle; reference velocity setting means for setting a reference velocity on the basis of an output from said driven wheel velocity detecting means; slip value detecting means for detecting a slip value of the driving wheel on the basis of a difference between an output from said driving wheel velocity detecting means and an output from said reference velocity setting means; target engine torque setting means for setting a target output torque of an engine of the vehicle in accordance with an output from said slip value detecting means; lateral acceleration detecting means for detecting a lateral acceleration generated in a widthwise direction of the vehicle; and target engine torque correcting means for correcting the target output torque in accordance with an output from said lateral acceleration detecting means which comprises first correction value setting means for setting a first correction value which increases with an increase in output from said lateral acceleration detecting means, lateral acceleration changing value calculating means for calculating a changing value of the lateral acceleration as a function of time, a second correction value setting means for setting a second correction value which increases with an increase in output from said lateral acceleration changing value calculating means, which has a negative value when the output from said lateral acceleration changing value calculating means is smaller than a predetermined value, and has a positive value when the output from said lateral acceleration changing value calculating means is longer than the predetermined value, and slip value correcting means for correcting the target output torque by correcting the slip value in accordance with outputs from said first and second correction value setting means. - View Dependent Claims (17)
-
Specification