Vehicle stability control apparatus
AssigneeNissan Motor Co., Ltd.
InventorGenpei Naito
Life of this patent
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Abstract
A vehicle stability control apparatus calculates a desired yaw rate from the angle of the steering wheel and vehicle's velocity and always executes control so as to have the actual yaw rate correspond to the desired yaw rate. Both of the front wheels' braking force and the rear wheels' braking force are operated according to the amendment momentum calculated by a control in response to the yaw rate difference. However, the actual yaw rate cannot be accurately corresponded to the desired yawing moment without delay when the driver operates a steering wheel rapidly in the emergency evasion condition, the control unit increases the amendment momentum right after the emergency evasion condition. Furthermore, the control unit decreases the amendment momentum when the vehicle is converging on straight-ahead driving.
Claims16
A vehicle stability control apparatus, comprising:
- a yaw rate sensor to detect a yaw rate of a vehicle;
- a physical amount detector to detect a physical amount input in the vehicle;
- a yaw momentum control apparatus to control yaw momentum of the vehicle in response to a control signal;
- and
- a control unit operatively coupled with the yaw rate sensor, the physical amount detector, and a yaw momentum control apparatus;
- wherein
- the control unit calculates a first desired yaw rate for the vehicle from the physical amount;
- the control unit sets the first desired yaw rate as a desired yaw rate;
- the control unit judges that the vehicle is in an emergency evasion condition when the difference between the yaw rate and the first yaw rate is larger than a first value;
- the control unit sets 0 or nearly 0 as a desired yaw rate when the control unit judges that the vehicle is in the emergency evasion condition;
- and
- the control unit applies the control signal to the yaw momentum control apparatus to reduce the difference between the yaw rate and the desired yaw rate.
A vehicle stability control apparatus, comprising:
- a yaw rate sensor to detect a yaw rate of a vehicle;
- a physical amount detector to detect a physical amount input in the vehicle;
- a yaw momentum control apparatus to control yaw momentum of the vehicle in response to a control signal;
- and
- a control unit operatively coupled with the yaw rate sensor, the physical amount detector, and a yaw momentum control apparatus;
- wherein
- the control unit calculates a first desired yaw rate for the vehicle from the physical amount;
- the control unit judges whether the vehicle is in a normal condition or an emergency evasion condition, the control unit judging that the vehicle changes from the normal condition to the emergency evasion condition when the difference between the yaw rate and the first yaw rate is larger than a first value;
- the control unit sets the first desired yaw rate as a desired yaw rate;
- the control unit sets 0 or nearly 0 as the desired yaw rate when the control unit judges that the vehicle is in the emergency evasion condition;
- the control unit applies the control signal to the yaw momentum control apparatus to reduce the difference between the yaw rate and the desired yaw rate.
A vehicle stability control apparatus, comprising:
- means for detecting a yaw rate of a vehicle;
- means for detecting a physical amount, the physical amount being input in the vehicle;
- means for controlling yaw momentum of the vehicle in response to a control signal;
- means for calculating a first desired yaw rate for the vehicle from the physical amount;
- means for setting the first desired yaw rate as a desired yaw rate;
- means for judging whether the vehicle is in an emergency evasion condition when the difference between the yaw rate and the first yaw rate is larger than a first value;
- means for setting 0 or nearly 0 as a desired yaw rate when the means for judging judges that the vehicle is in an emergency evasion condition;
- means for applying the control signal to the means for controlling yaw momentum to reduce the difference between the yaw rate and the desired yaw rate.
A vehicle stability control apparatus, comprising:
- means for detecting a yaw rate of a vehicle;
- means for detecting a physical amount, the physical amount being input in the vehicle;
- means for calculating a first desired yaw rate for the vehicle from the physical amount;
- means for judging whether the vehicle is in a normal condition or emergency evasion condition, judging that the vehicle changes from the normal condition to the emergency evasion condition when the difference between the yaw rate and the first yaw rate is larger than a first value;
- means for setting the first desired yaw rate as a desired yaw rate when the means for judging judges that the vehicle is in the normal condition;
- means for setting 0 or nearly 0 as the desired yaw rate when the control unit means for judging judges as the vehicle is on the emergency evasion condition;
- means for applying the control signal to a yaw momentum control apparatus to reduce the difference between the yaw rate and the desired yaw rate.
Dependencies are inferred from the claim text.