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US 10,207,709 B2Granted
Method for preventing wheel spin on stopped vehicles
AssigneeFord Global Technologies, LLC
InventorsRoss Dykstra Pursifull, Ralph Wayne Cunningham
Life of this patent
Estimating the term…
Abstract
A method of applying a brake force to all four wheels of a motor vehicle to stop the vehicle while torque continues to be applied to its driven wheels; and preventing wheel slippage of the driven wheels by reducing the applied torque when the vehicle is stopped or nearly stopped from moving in a forward direction. In this way, unintentional lateral movement of the vehicle due to creep torque applied to the driven wheels on slippery surfaces can be prevented or corrected.
Claims10
A system for controlling driven wheels of a motor vehicle, comprising:
- a braking system coupled to the driven wheels and non-driven wheels of the vehicle, said braking system responsive to an operator controlled brake;
- an internal combustion engine coupled to the driven wheels through an automatic transmission;
- an air intake system including a throttle coupled to an intake of said engine, said throttle responsive to an operator controlled accelerator pedal;
- said automatic transmission having electrically actuated hydraulic clutches to engage one of a plurality of gears having different gear ratios, each of said gears when engaged coupling engine torque modified by said engaged gear to said driven wheels;
- and
- a controller controlling said engine and said automatic transmission, said controller including instructions stored in non-transitory memory for actuating a different one of said selected gears for each one of a range of predetermined speeds of said engine to provide a substantially constant torque applied to said driven wheels over said range of predetermined engine speeds when said throttle has been moved to an idle position and said braking system has slowed said vehicle below a predetermined speed or has stopped said vehicle,
- wherein said range of predetermined engine speeds corresponds to a range of engine idle speeds.
4 more elements
Dependencies are inferred from the claim text.