Method for operating multiple axle regenerative braking in an automotive vehicle
AssigneeFord Global Technologies, LLC
InventorsDale S. Crombez, Michael J. Schneider
Life of this patent
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Abstract
A system and method for maximizing the post-ABS regenerative braking capability of an automotive vehicle having regenerative braking available for more than one axle determines the availability of surplus regenerative braking capacity on a first axle and then uses the surplus, if any, to satisfy the brake demand for another axle having insufficient regenerative braking capacity. This system restores regenerative braking without causing the regenerative braking to trigger a subsequent ABS event.
Claims9
A method for operating regenerative braking in an automotive vehicle having a plurality of axles, comprising the steps of:
- determining a brake demand for a first axle;
- determining the availability of regenerative braking of said first axle to satisfy said brake demand;
- determining a brake demand for a second axle;
- determining the availability of regenerative braking of said second axle to satisfy the braking demand for said second axle;
- and
- in the event that regenerative braking available for the first axle is greater than the brake demand for the first axle, and in the further event that the regenerative braking available for the second axle is less than the braking demand for the second axle, applying any surplus regenerative braking to the first axle in an amount not greater than the amount needed to satisfy any unmet braking demand for the second axle.
A control system for operating regenerative and friction brakes on a plurality of axles of an automotive vehicle, comprising:
- a plurality of sensors for providing a plurality of outputs corresponding to a plurality of vehicle operating parameters;
- a controller for receiving inputs from said plurality of sensors;
- and
- an operating system, within said controller, for determining a unique brake demand for each of said plurality of axles, and for determining the regenerative braking available for each axle, with said controller applying regenerative braking to a firs one of said axle in an amount greater than the brake demand for said first axle in the event that surplus regenerative capacity is present for the first axle and insufficient regenerative braking is available to meet the brake demand for a second one of said axles.
Dependencies are inferred from the claim text.