Vehicle dynamics control apparatus
First Claim
1. A vehicle dynamics control apparatus comprising:
- sensors that detect at least a turning condition and a driving condition of a host vehicle;
an actuator that produces a yaw moment acting on the host vehicle; and
a control unit configured to be electronically connected to the sensors and the actuator, for enabling vehicle dynamics control and lane deviation prevention control, the control unit comprising;
(a) a driving stability decision section that determines a driving stability including a vehicle driveability and a vehicle stability, based on at least the turning condition;
(b) a yawing-motion control section that controls a yawing motion of the host vehicle by producing the yaw moment corresponding to a final desired yaw moment and acting in a direction that improves the driving stability when the driving stability is deteriorated, the final desired yaw moment being determined to be equal to a controlled variable of the lane deviation prevention control when the vehicle dynamics control is inoperative and determined to be equal to a controlled variable of the vehicle dynamics control when the vehicle dynamics control is operative;
(c) a lane deviation prevention section that determines, based on the driving condition, a lane-deviation tendency of the host vehicle from a driving lane, and executes the lane deviation prevention control by producing the yaw moment corresponding to the controlled variable of the lane deviation prevention control and acting in a direction that lane deviation is prevented; and
(d) a driving stability decision compensation section that compensates for a decision of the driving stability, based on the controlled variable of the lane deviation prevention control.
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Accused Products
Abstract
In a vehicle dynamics control apparatus enabling vehicle dynamics control and lane deviation prevention control, a processor of a control unit is programmed for determining a driving stability including a vehicle driveability and a vehicle stability, based on at least a steer angle, and for executing the vehicle dynamics control by producing a yaw moment corresponding to a controlled variable of the vehicle dynamics control when the driving stability is deteriorated, and for executing the lane deviation prevention control by producing a yaw moment corresponding to a controlled variable of the lane deviation prevention control when there is a possibility of lane deviation. The processor is further programmed for softening a criterion, which is used to determine the driving stability, based on the controlled variable of the lane deviation prevention control, only when the vehicle dynamics control is inoperative.
48 Citations
24 Claims
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1. A vehicle dynamics control apparatus comprising:
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sensors that detect at least a turning condition and a driving condition of a host vehicle;
an actuator that produces a yaw moment acting on the host vehicle; and
a control unit configured to be electronically connected to the sensors and the actuator, for enabling vehicle dynamics control and lane deviation prevention control, the control unit comprising;
(a) a driving stability decision section that determines a driving stability including a vehicle driveability and a vehicle stability, based on at least the turning condition;
(b) a yawing-motion control section that controls a yawing motion of the host vehicle by producing the yaw moment corresponding to a final desired yaw moment and acting in a direction that improves the driving stability when the driving stability is deteriorated, the final desired yaw moment being determined to be equal to a controlled variable of the lane deviation prevention control when the vehicle dynamics control is inoperative and determined to be equal to a controlled variable of the vehicle dynamics control when the vehicle dynamics control is operative;
(c) a lane deviation prevention section that determines, based on the driving condition, a lane-deviation tendency of the host vehicle from a driving lane, and executes the lane deviation prevention control by producing the yaw moment corresponding to the controlled variable of the lane deviation prevention control and acting in a direction that lane deviation is prevented; and
(d) a driving stability decision compensation section that compensates for a decision of the driving stability, based on the controlled variable of the lane deviation prevention control. - View Dependent Claims (2, 3, 4, 7, 8, 9, 10)
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5. A vehicle dynamics control apparatus comprising:
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sensors that detect at least an actual yaw rate, a yaw angle, a host vehicle speed, and a steer angle;
an actuator that produces a yaw moment acting on the host vehicle; and
a control unit configured to be electronically connected to the sensors and the actuator, for enabling vehicle dynamics control and lane deviation prevention control, the control unit comprising;
(a) a desired yaw rate calculation section that calculates a desired yaw rate based on at least the host vehicle speed and the steer angle;
(b) a driving stability decision section that determines a driving stability including a vehicle driveability and a vehicle stability, based on at least a yaw-rate deviation between the actual yaw rate and a final desired yaw rate;
(c) a yawing-motion control section that controls a yawing motion of the host vehicle by producing the yaw moment corresponding to a final desired yaw moment and acting in a direction that improves the driving stability when the driving stability is deteriorated, the final desired yaw moment being determined to be equal to a controlled variable of the lane deviation prevention control when the vehicle dynamics control is inoperative and determined to be equal to a controlled variable of the vehicle dynamics control when the vehicle dynamics control is operative;
(d) a lane deviation prevention section that determines, based on at least the host vehicle speed and the yaw angle, a lane-deviation tendency of the host vehicle from a driving lane, and executes the lane deviation prevention control by producing the yaw moment corresponding to the controlled variable of the lane deviation prevention control and acting in a direction that lane deviation is prevented; and
(e) a desired yaw rate compensation section that compensates for the desired yaw rate based on the controlled variable of the lane deviation prevention control to produce the final desired yaw rate.
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6. A vehicle dynamics control apparatus comprising:
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sensors that detect at least an actual yaw rate, a yaw angle, a host vehicle speed, and a steer angle;
an actuator that produces a yaw moment acting on the host vehicle; and
a control unit configured to be electronically connected to the sensors and the actuator, for enabling vehicle dynamics control and lane deviation prevention control, the control unit comprising;
(a) a lane deviation prevention section that determines, based on at least the host vehicle speed and the yaw angle, a lane-deviation tendency of the host vehicle from a driving lane, and executes the lane deviation prevention control by producing the yaw moment corresponding to a controlled variable of the lane deviation prevention control and acting in a direction that lane deviation is prevented;
(b) an equivalent steer angle calculation section that calculates an equivalent steer angle equivalent to the controlled variable of the lane deviation prevention control;
(c) a steer-angle correction value calculation section that calculates a steer-angle correction value by adding the equivalent steer angle to the steer angle;
(d) a desired yaw rate calculation section that calculates a final desired yaw rate based on the steer-angle correction value;
(e) a driving stability decision section that determines a driving stability including a vehicle driveability and a vehicle stability, based on at least a yaw-rate deviation between the actual yaw rate and the final desired yaw rate; and
(f) a yawing-motion control section that controls a yawing motion of the host vehicle by producing the yaw moment corresponding to a final desired yaw moment and acting in a direction that improves the driving stability when the driving stability is deteriorated, the final desired yaw moment being determined to be equal to the controlled variable of the lane deviation prevention control when the vehicle dynamics control is inoperative and determined to be equal to a controlled variable of the vehicle dynamics control when the vehicle dynamics control is operative.
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11. A vehicle dynamics control apparatus comprising:
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sensors that detect at least a turning condition and a driving condition of a host vehicle;
an actuator that produces a yaw moment acting on the host vehicle;
a control unit configured to be electronically connected to the sensors and the actuator, for enabling vehicle dynamics control and lane deviation prevention control, the control unit comprising a processor programmed to perform the following, (a) determining a driving stability including a vehicle driveability and a vehicle stability, based on at least the turning condition;
(b) executing the vehicle dynamics control by producing the yaw moment corresponding to a controlled variable of the vehicle dynamics control that improves the driving stability when the driving stability is deteriorated;
(c) executing the lane deviation prevention control by producing the yaw moment corresponding to a controlled variable of the lane deviation prevention control that prevents lane deviation; and
(d) softening a criterion, which is used to determine the driving stability, based on the controlled variable of the lane deviation prevention control, only when the vehicle dynamics control is inoperative. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of balancing a vehicle dynamics control system and a lane deviation prevention control system, the method comprising:
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detecting at least a turning condition and a driving condition of a host vehicle;
determining a driving stability including a vehicle driveability and a vehicle stability, based on at least the turning condition;
controlling a yawing motion of the host vehicle by producing a yaw moment corresponding to a final desired yaw moment and acting on the host vehicle in a direction that improves the driving stability when the driving stability is deteriorated;
selecting a controlled variable of lane deviation prevention control as the final desired yaw moment when the vehicle dynamics control is inoperative;
selecting a controlled variable of vehicle dynamics control as the final desired yaw moment when the vehicle dynamics control is operative;
determining, based on the driving condition, a lane-deviation tendency of the host vehicle from a driving lane;
executing the lane deviation prevention control by producing a yaw moment corresponding to the controlled variable of the lane deviation prevention control and acting on the host vehicle in a direction that lane deviation is prevented; and
compensating for a decision of the driving stability, based on the controlled variable of the lane deviation prevention control.
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18. A method of balancing a vehicle dynamics control system and a lane deviation prevention control system, the method comprising:
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detecting at least a turning condition and a driving condition of a host vehicle;
determining a driving stability including a vehicle driveability and a vehicle stability, based on at least the turning condition;
executing the vehicle dynamics control by producing a yaw moment corresponding to a controlled variable of the vehicle dynamics control that improves the driving stability when the driving stability is deteriorated;
executing the lane deviation prevention control by producing a yaw moment corresponding to a controlled variable of the lane deviation prevention control that prevents lane deviation; and
softening a criterion, which is used to determine the driving stability, based on the controlled variable (MsL) of the lane deviation prevention control, only when the vehicle dynamics control is inoperative. - View Dependent Claims (19, 20, 21, 22)
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23. A vehicle dynamics control apparatus comprising:
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sensor means for detecting at least a turning condition and a driving condition of a host vehicle;
actuating means for producing a yaw moment acting on the host vehicle; and
a control unit configured to be electronically connected to the sensor means and the actuating means, for enabling vehicle dynamics control and lane deviation prevention control, the control unit comprising;
(a) a driving stability decision means for determining a driving stability including a vehicle driveability and a vehicle stability, based on at least the turning condition;
(b) a yawing-motion control means for controlling a yawing motion of the host vehicle by producing the yaw moment corresponding to a final desired yaw moment and acting in a direction that improves the driving stability when the driving stability is deteriorated, the final desired yaw moment being determined to be equal to a controlled variable of the lane deviation prevention control when the vehicle dynamics control is inoperative and determined to be equal to a controlled variable of the vehicle dynamics control when the vehicle dynamics control is operative;
(c) a lane deviation prevention means for determining, based on the driving condition, a lane-deviation tendency of the host vehicle from a driving lane, and executes the lane deviation prevention control by producing the yaw moment corresponding to the controlled variable of the lane deviation prevention control and acting in a direction that lane deviation is prevented; and
(d) a driving stability decision compensation means for compensating for a decision of the driving stability, based on the controlled variable of the lane deviation prevention control.
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24. A vehicle dynamics control apparatus comprising:
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sensor means for detecting at least a turning condition and a driving condition of a host vehicle;
actuating means for producing a yaw moment acting on the host vehicle;
control means configured to be electronically connected to the sensor means and the actuating means, for enabling vehicle dynamics control and lane deviation prevention control, the control means comprising a processor programmed to perform the following, (a) determining a driving stability including a vehicle driveability and a vehicle stability, based on at least the turning condition;
(b) executing the vehicle dynamics control by producing the yaw moment corresponding to a controlled variable of the vehicle dynamics control that improves the driving stability when the driving stability is deteriorated;
(c) executing the lane deviation prevention control by producing the yaw moment corresponding to a controlled variable of the lane deviation prevention control that prevents lane deviation; and
(d) softening a criterion, which is used to determine the driving stability, based on the controlled variable of the lane deviation prevention control, only when the vehicle dynamics control is inoperative.
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Specification