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US 7,441,627 B2Granted
Vehicle control system
AssigneeJtekt Corporation
InventorsTakayuki Ohta, Shinji Takeuchi, Minekazu Momiyama, Hiroaki Kato, Tsuyoshi Murakami
Life of this patent
Estimating the term…
Abstract
The control system of a vehicle controls the transmission ratio of the steering angle of a steering wheel relative to a turning angle of front wheels based on a drive force distribution ratio. Thus, the performance of the tires on the front wheels can be used to almost maximum potential, providing effective prevention of understeering.
Claims11
A vehicle control system comprising:
- a drive force distributor distributing a drive force from a drive source to a front wheel and a rear wheel so that a distribution ratio of said drive force can be changed;
- and
- a first transmission ratio changer changing a transmission ratio based on said drive force distribution and controlling said transmission ratio of a turning angle of said front wheel relative to a steering angle of a steering wheel based on said distribution ratio of said drive force.
A vehicle control system comprising:
- means for distributing a drive force from a drive source to a front wheel and a rear wheel so that a distribution ratio of said drive force can be changed;
- and
- means for changing a transmission ratio based on said drive force distribution controlling said transmission ratio of a turning angle of said front wheel relative to a steering angle of a steering wheel based on said distribution ratio of said drive force.
A method for controlling a vehicle comprising the steps of:
- distributing a drive force from a drive source to a front wheel and a rear wheel so that a distribution ratio of said drive force can be changed;
- and
- controlling a transmission ratio of a turning angle of said front wheel relative to a steering angle of a steering wheel based on said distribution ratio of said drive force.
A vehicle control system comprising:
- a drive force distributor distributing a drive force from a drive source to a front wheel and a rear wheel so that a distribution ratio of said drive force can be changed;
- a first transmission ratio changer changing a transmission ratio based on said drive force distribution and controlling said transmission ratio of a turning angle of said front wheel relative to a steering angle of a steering wheel based on said distribution ratio of said drive force;
- an understeering detector;
- and
- a second transmission ratio changer changing said transmission ratio based on said understeering and reducing said transmission ratio when said understeering is detected by said understeering detector;
- wherein, when said understeering is detected, said first transmission ratio changer corrects said reduction of said transmission ratio performed by said second transmission ratio changer.
3 more elements
A method for controlling a vehicle comprising the steps of:
- distributing a drive force from a drive source to a front wheel and a rear wheel so that a distribution ratio of said drive force can be changed;
- controlling a transmission ratio of a turning angle of said front wheel relative to a steering angle of a steering wheel based on said distribution ratio of said drive force;
- detecting understeering;
- reducing said transmission ratio when said understeering is detected;
- and
- correcting said reduction of said transmission ratio when said understeering is detected.
3 more elements
Dependencies are inferred from the claim text.