Vehicle including a wheel stopping determination unit
First Claim
1. A vehicle comprising:
- a wheel speed sensor which outputs a wheel speed pulse in accordance with the rotation of wheels;
a wheel stopping determination unit which determines whether the rotation of the wheels is stopped or not on the basis of the wheel speed pulse output from the wheel speed sensor;
a vehicle stopping determination unit which, when the wheel stopping determination unit determines that at least one wheel is stopped, determines whether the vehicle is stopped or not on the basis of whether or not the behavior of the vehicle is stable; and
a vehicle control unit which performs vehicle control after the wheel stopping determination unit has determined that the rotation of the wheels is stopped,wherein, when a non-output time for which no wheel speed pulse is output from the wheel speed sensor is equal to or longer than a stopping determination time which is calculated by multiplying a time corresponding to the pulse width of a wheel speed pulse output from the wheel speed sensor before the non-output time by 21/2+1 which is set taking into consideration the deceleration and traveling distance of the vehicle or equal to or longer than a corrected time which is based on the stopping determination time, the wheel stopping determination unit determines that the rotation of the wheels is stopped,when it is determined that a predetermined time has elapsed after the wheel stopping information indicating the stopping of the wheel has been received from the wheel stopping determination unit, the wheel stopping determination unit determines that a nose dive which is a change in the behavior of the vehicle with a front-down inclination at the time of deceleration of the vehicle has settled and determines that the vehicle is stopped, andwhen receiving the wheel stopping information from the wheel stopping determination unit the vehicle control unit executes stopping maintenance control such that the vehicle is maintained in the stopping state during the nose dive.
1 Assignment
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Accused Products
Abstract
A vehicle that improves the accuracy of wheel stopping determination including a stopping determination unit that calculates stopping determination time by multiplying the pulse width of a wheel speed pulse immediately before a non-output time, for which no wheel speed pulse is output from a wheel speed sensor, by 21/2+1, or a corrected time which is corrected on the basis of the stopping determination time is set as a threshold value for determining stopping of wheels. Thus, the time corresponding to the pulse width of the wheel speed pulse takes into consideration the deceleration and traveling distance of the vehicle, thereby obtaining an optimum threshold value for determining the stopping of the wheels.
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Citations
4 Claims
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1. A vehicle comprising:
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a wheel speed sensor which outputs a wheel speed pulse in accordance with the rotation of wheels; a wheel stopping determination unit which determines whether the rotation of the wheels is stopped or not on the basis of the wheel speed pulse output from the wheel speed sensor; a vehicle stopping determination unit which, when the wheel stopping determination unit determines that at least one wheel is stopped, determines whether the vehicle is stopped or not on the basis of whether or not the behavior of the vehicle is stable; and a vehicle control unit which performs vehicle control after the wheel stopping determination unit has determined that the rotation of the wheels is stopped, wherein, when a non-output time for which no wheel speed pulse is output from the wheel speed sensor is equal to or longer than a stopping determination time which is calculated by multiplying a time corresponding to the pulse width of a wheel speed pulse output from the wheel speed sensor before the non-output time by 21/2+1 which is set taking into consideration the deceleration and traveling distance of the vehicle or equal to or longer than a corrected time which is based on the stopping determination time, the wheel stopping determination unit determines that the rotation of the wheels is stopped, when it is determined that a predetermined time has elapsed after the wheel stopping information indicating the stopping of the wheel has been received from the wheel stopping determination unit, the wheel stopping determination unit determines that a nose dive which is a change in the behavior of the vehicle with a front-down inclination at the time of deceleration of the vehicle has settled and determines that the vehicle is stopped, and when receiving the wheel stopping information from the wheel stopping determination unit the vehicle control unit executes stopping maintenance control such that the vehicle is maintained in the stopping state during the nose dive. - View Dependent Claims (2, 3, 4)
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Specification