Load-based torque redistribution method in 4-wheel drive vehicle
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorCameron Phillip Williams
Life of this patent
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Abstract
A method for redistributing driving torque between front and rear driving wheels of a vehicle traveling at essentially the same speed. The method includes determining a vehicle condition corresponding to load, based upon at least one vehicle parameter, comparing the determined vehicle condition to a predetermined value, wherein if the determining vehicle condition exceeds the predetermined value, a high load condition exists, and redistributing the driving torque between the front and rear wheels, when the determining step determines that a high load condition exists. By controlling torque redistribution in accordance with one or more high load conditions on the driveline components, subsequent damage of the driveline system can be reduced or prevented.
Claims13
A method of redistributing driving torque between front and rear driving wheels of a vehicle, when the front and rear wheels are traveling at essentially the same speed, said method comprising the steps of:
- determining a vehicle condition corresponding to load, based upon at least one vehicle parameter;
- comparing the determined vehicle condition to a predetermined value, wherein if the determining vehicle condition exceeds said parameter predetermined value, a high load condition exists;
- and
- redistributing the driving torque between the front and rear wheels, when the determining step determines that a high load condition exists.
A system for redistributing driving torque distributed between front and rear wheels of a vehicle, when the front and rear wheels are traveling at essentially the same speed, said system comprising:
- a front driveline for driving the front wheels;
- a rear driveline for driving the rear wheels;
- a torque transfer unit connecting said front and rear drivelines for distributing torque, from a power source, between said front and rear drivelines;
- at least one vehicle sensor;
- and
- a controller, coupled to said sensor and said torque transfer unit, for controlling torque split of said torque transfer unit in response to said sensor,
- wherein said controller includes a comparator for comparing a sensed vehicle parameter from said sensor, corresponding to a vehicle load, with a predetermined value and, if the sensed vehicle parameter exceeds said predetermined value, a high load condition exists and the driving torque is redistributed between the front and rear wheels.
Dependencies are inferred from the claim text.