Roll stability control using four-wheel drive
First Claim
Patent Images
1. A method of controlling a vehicle with a 4×
- 4 driving system, said method comprising the steps of;
determining a potential rollover condition from dynamic conditions sensed onboard said vehicle; and
transferring driving torque both through an electronically-controlled center differential or an electronically-controlled transfer case and to the front wheels of said vehicle so as to prevent rollover of said vehicle.
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Accused Products
Abstract
A control system (18) and method for controlling an automotive vehicle (10) includes a number of sensors that are used to generate a potential rollover signal. In response to the potential rollover, active differentials (112, 114, 116) may be used alone or in addition to braking to prevent the vehicle from rolling over.
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Citations
35 Claims
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1. A method of controlling a vehicle with a 4×
- 4 driving system, said method comprising the steps of;
determining a potential rollover condition from dynamic conditions sensed onboard said vehicle; and transferring driving torque both through an electronically-controlled center differential or an electronically-controlled transfer case and to the front wheels of said vehicle so as to prevent rollover of said vehicle. - View Dependent Claims (2, 3, 4, 5, 6)
- 4 driving system, said method comprising the steps of;
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7. A method of controlling a vehicle with a 4×
- 4 driving system, said method comprising the steps of;
generating a rollover signal in response to a potential rollover situation as determined from dynamic conditions sensed onboard said vehicle; increasing a torque in front outside wheel of said vehicle through a differential in response to said rollover signal; and braking a rear outside wheel of said vehicle in response to said rollover signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
- 4 driving system, said method comprising the steps of;
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16. A method of controlling a vehicle having an active differential, said method comprising the steps of:
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determining a rollover condition from dynamic conditions sensed onboard said vehicle; in response to said rollover condition, controllingly disengaging an inside wheel of said vehicle from an outside wheel of said vehicle with said active differential; and thereafter, determining a wheel lift condition of said inside wheel. - View Dependent Claims (17, 18, 19)
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20. A method of controlling a vehicle having a first wheel, a second wheel, and an active differential, said method comprising the steps of:
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during a potential rollover event or stability control event, determining a slip condition of said first wheel of said vehicle; controllingly reducing torque to said first wheel in response to said slip condition using said active differential; and controllingly increasing torque to said second wheel in response to said slip condition using said active differential. - View Dependent Claims (21, 22, 23)
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24. A method of controlling a vehicle having an active differential, said method comprising the steps of:
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determining a rollover condition from dynamic conditions sensed onboard said vehicle; in response to said rollover condition, controllingly disengaging a front outside wheel from an inside wheel of said vehicle with said active differential; applying a braking torque to said front outside wheel; and applying a powertrain torque to a rear outside wheel of said vehicle so as to counter a deceleration caused by the braking of said front outside wheel. - View Dependent Claims (25)
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26. A method of controlling a vehicle having an active differential, said method comprising the steps of:
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determining a possible rollover condition from dynamic conditions sensed onboard said vehicle; and in response to said possible rollover condition, using said active differential to distribute torque between a front wheel, a front left wheel, a rear left wheel, and a rear right wheel of said vehicle so as to help prevent actual rollover. - View Dependent Claims (27, 28)
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29. A roll stability control system for a vehicle having front wheels and rear wheels, said roll stability control system comprising:
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a differential; a rollover sensor operable to generate a rollover signal; and a controller coupled to said rollover sensor and said differential; wherein said controller is operable to control said differential so as to limit vehicle powertrain torque applied to said front wheels and thereby prevent rollover of said vehicle. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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Specification