Vehicle braking/driving force control apparatus
First Claim
1. A vehicle braking/driving force control apparatus, comprising:
- an actuator for independently driving a front left wheel, a front right wheel, a rear left wheel, and a rear right wheel, thereby generating a braking/driving force representing both a braking force and a driving force on each of the front left wheel, the front right wheel, the rear left wheel, and the rear right wheel;
a suspension link mechanism for independently coupling the each of the front left wheel, the front right wheel, the rear left wheel, and the rear right wheel to a vehicle body, and converting the braking/driving force on the each of the front left wheel, the front right wheel, the rear left wheel, and the rear right wheel driven by the actuator into a force in a vertical direction of the vehicle body,the suspension link mechanism being configured so that a conversion rate of converting the braking/driving force into the force in the vertical direction of the vehicle body is different between a front wheel side and a rear wheel side;
target braking/driving force calculation means for calculating target braking/driving forces for the four wheels, including a driver-requested braking/driving force set based on an operation amount of a driver and a motion control braking/driving force necessary for vehicle motion control;
actuator control means for controlling operations of the actuators by following the target braking/driving forces; and
distribution setting means for setting a distribution of the driver-requested braking/driving force to the front wheels and the rear wheels so that the distributed driver-requested braking/driving force is larger for the wheels coupled to the suspension link mechanisms having a larger conversion rate than for the wheels coupled to the suspension link mechanisms having a smaller conversion rate, wherein the actuator control means includes the conversion rate pre-stored therein.
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Accused Products
Abstract
When an ECU carries out vehicle yaw motion control on such a vehicle that a conversion rate of converting the braking/driving force into a vertical force is larger on rear wheels than on front wheels, a driver-requested braking/driving force is distributed to the four wheels so that a distribution ratio is larger for the rear wheels than for the front wheels. Thus, when roll control necessary as a result of the vehicle yaw motion control is carried out, a target braking/driving force of a turning outer wheel for which the largest control driving force is required becomes hard to reach a driving limit. From the foregoing, when vehicle motion control is carried out with use of a braking/driving force of each wheel, each wheel is prevented from reaching a driving force limit as much as possible.
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Citations
9 Claims
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1. A vehicle braking/driving force control apparatus, comprising:
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an actuator for independently driving a front left wheel, a front right wheel, a rear left wheel, and a rear right wheel, thereby generating a braking/driving force representing both a braking force and a driving force on each of the front left wheel, the front right wheel, the rear left wheel, and the rear right wheel; a suspension link mechanism for independently coupling the each of the front left wheel, the front right wheel, the rear left wheel, and the rear right wheel to a vehicle body, and converting the braking/driving force on the each of the front left wheel, the front right wheel, the rear left wheel, and the rear right wheel driven by the actuator into a force in a vertical direction of the vehicle body, the suspension link mechanism being configured so that a conversion rate of converting the braking/driving force into the force in the vertical direction of the vehicle body is different between a front wheel side and a rear wheel side; target braking/driving force calculation means for calculating target braking/driving forces for the four wheels, including a driver-requested braking/driving force set based on an operation amount of a driver and a motion control braking/driving force necessary for vehicle motion control; actuator control means for controlling operations of the actuators by following the target braking/driving forces; and distribution setting means for setting a distribution of the driver-requested braking/driving force to the front wheels and the rear wheels so that the distributed driver-requested braking/driving force is larger for the wheels coupled to the suspension link mechanisms having a larger conversion rate than for the wheels coupled to the suspension link mechanisms having a smaller conversion rate, wherein the actuator control means includes the conversion rate pre-stored therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification