Drive force control method for four-wheel drive vehicle
First Claim
1. A drive force control method for a four-wheel drive vehicle including a torque distributing mechanism capable of changing a drive force distribution ratio between front and rear wheels and a drive force distribution ratio between right and left front wheels or between right and left rear wheels, said drive force control method comprising the steps of:
- detecting a lateral G to output a lateral G signal;
increasing the drive force distribution ratio of said rear wheels to said front wheels according to an increase in absolute value of said lateral G signal; and
increasing the drive force distribution ratio of a turning outer wheel as one of said right and left front wheels or one of said right and left rear wheels to a turning inner wheel as the other according to an increase in absolute value of said lateral G signal.
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Accused Products
Abstract
A drive force control method for a four-wheel drive vehicle including a torque distributing mechanism capable of changing a drive force distribution ratio between front and rear wheels and a drive force distribution ratio between right and left front wheels or between right and left rear wheels. This method includes the steps of increasing the drive force distribution ratio of the rear wheels to the front wheels according to an increase in absolute value of a lateral G signal, and increasing the drive force distribution ratio of a turning outer wheel as one of the right and left front wheels or one of the right and left rear wheels to a turning inner wheel as the other. A lateral G sensor signal is corrected by an estimated lateral G signal calculated according to a steering angle and a vehicle speed to obtain a control lateral G signal, which is used as the lateral G signal.
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Citations
4 Claims
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1. A drive force control method for a four-wheel drive vehicle including a torque distributing mechanism capable of changing a drive force distribution ratio between front and rear wheels and a drive force distribution ratio between right and left front wheels or between right and left rear wheels, said drive force control method comprising the steps of:
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detecting a lateral G to output a lateral G signal;
increasing the drive force distribution ratio of said rear wheels to said front wheels according to an increase in absolute value of said lateral G signal; and
increasing the drive force distribution ratio of a turning outer wheel as one of said right and left front wheels or one of said right and left rear wheels to a turning inner wheel as the other according to an increase in absolute value of said lateral G signal. - View Dependent Claims (2, 3)
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4. A drive force control method for a four-wheel drive vehicle including a torque distributing mechanism capable of changing a drive force distribution ratio between front and rear wheels and a drive force distribution ratio between right and left front wheels or between right and left rear wheels, said drive force control method comprising the steps of:
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detecting a lateral G to output a lateral G signal; and
increasing the drive force distribution ratio of a turning outer wheel to a turning inner wheel according to an increase in absolute value of said lateral G signal.
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Specification