Torque distribution control system for four-wheel drive vehicle
First Claim
1. A torque distribution control system for a four-wheel drive vehicle comprisingan engine output control means which controls the output of the engine of the vehicle,a braking control means which separately controls the braking forces applied to the left wheels and the right wheels and/or the braking forces applied to the front wheels and the rear wheels, anda torque distribution changing means which determines the torque distribution to the wheels according to the running conditon of the vehicle, and controls the braking control means and the engine output control means to apply a braking force to one of the front wheels and the right wheels and to increase the output of the engine by an amount substantially corresponding to the braking force applied to said one of the front wheels and the rear wheels or said one of the left wheels and the right wheels so that said torque distribution determined according to the running condition of the vehicle can be maintained with a total applied torque to all the wheels being substantially constant.
1 Assignment
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Accused Products
Abstract
A torque distribution control system for a four-wheel drive vehicle has an engine output controller which controls the output of the engine of the vehicle, a braking controller which separately controls the braking forces applied to the left wheels and the right wheels and/or the braking forces applied to the front wheels and the rear wheels. A torque distribution changing system determines the torque distribution to the wheels according to the running condition of the vehicle and controls the braking controller and the engine output controller to apply a braking force to one of the front wheels and the rear wheels or one of the left wheels and the right wheels and to increase the output of the engine by an amount substantially corresponding to the braking force applied to the one of the front wheels and the rear wheels or the one of the left wheels and the right wheels so that the torque distribution determined according to the running condition of the vehicle can be obtained.
46 Citations
17 Claims
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1. A torque distribution control system for a four-wheel drive vehicle comprising
an engine output control means which controls the output of the engine of the vehicle, a braking control means which separately controls the braking forces applied to the left wheels and the right wheels and/or the braking forces applied to the front wheels and the rear wheels, and a torque distribution changing means which determines the torque distribution to the wheels according to the running conditon of the vehicle, and controls the braking control means and the engine output control means to apply a braking force to one of the front wheels and the right wheels and to increase the output of the engine by an amount substantially corresponding to the braking force applied to said one of the front wheels and the rear wheels or said one of the left wheels and the right wheels so that said torque distribution determined according to the running condition of the vehicle can be maintained with a total applied torque to all the wheels being substantially constant.
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12. A torque distribution control system for a four-wheel drive vehicle comprising
an engine output control means which controls the output of the engine of the vehicle, a braking control means which separately controls the braking forces applied to the left wheels and the right wheels and/or the braking forces applied to the front wheels and the rear wheels, an acceleration detecting means which detects the longitudinal acceleration of the vehicle, a cornering detecting means which detects that the vehicle is making a cornering, and a torque distribution changing means which determines the torque distribution to the wheels on the basis of signals from the acceleration detecting means and the cornering detecting means so that the torque distribution to the rear wheels is increased with increase in the longitudinal acceleration, and the torque distribution to the rear wheels is increased when the vehicle is entering a corner and the torque distribution to the front wheels is increased when the vehicle is going out of the corner, and controls the braking control means and the engine output control means to apply a braking force to one of the front wheels and the rear wheels or one of the left wheels and the right wheels and to increase the output of the engine by an amount substantially corresponding to the braking force applied to said one of the front wheels and the rear wheels or said one of the left wheels and the right wheels so that said torque distribution determined according to the running condition of the vehicle can be obtained.
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16. A torque distribution control system for a four-wheel drive vehicle comprising a means for detecting the acceleration of the vehicle, a torque distribution determining means which determines the torque distribution to the front wheels and the rear wheels according to the acceleration of the vehicle, and a means for controlling the torque distribution to the front wheels and the rear wheels on the basis of the torque distribution determined by the torque distribution determining means so that a total applied torque to the front wheels and the rear wheels is maintained substantially constant.
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17. A torque distribution control system for a four-wheel drive vehicle comprising as means for detecting entrance of the vehicle into a corner and exit of the vehicle from the corner, a torque distribution determining means which determines the torque distribution to the front wheels and the rear wheels so that the torque distribution to the rear wheels is increased when the vehicle is entering a corner and the torque distribution to the front wheels is increased when the vehicle is going out of the corner, and a means for controlling the torque distribution to the front wheels and the rear wheels on the basis of the torque distribution determined by the torque distribution determining means.
Specification