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US 9,428,193 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 comprising: 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.
Claims16
A method, comprising:
- applying a brake force to all four wheels of a motor vehicle to stop said vehicle while torque continues to be applied to its driven wheels;
- and
- preventing wheel slippage of said driven wheels by reducing said applied torque when said vehicle is stopped or nearly stopped from moving in a forward direction, wherein said reducing said applied torque is both initiated before said wheel slippage occurs and after said wheel slippage occurs.
A method, comprising:
- applying a brake force to all four wheels of a motor vehicle to stop said vehicle while torque continues to be applied to its driven wheels;
- and
- in response to wheel slippage of said driven wheels when said vehicle is stopped from moving in a forward direction, reducing said applied torque to reduce said slippage, wherein said reducing said applied torque comprises upshifting an automatic transmission coupled between an engine of said vehicle and said driven wheels, said applying of the brake force responsive to a brake booster vacuum level and creep torque.
A method, comprising:
- applying a brake force to all four wheels of a motor vehicle to stop said vehicle while torque continues to be applied to its driven wheels;
- and
- preventing wheel slippage of said driven wheels by reducing said applied torque when said vehicle is stopped or nearly stopped from moving in a forward direction, wherein said reducing said applied torque comprises reducing a speed of an engine of said vehicle and wherein said engine speed is reduced by one or more of the following:
- throttling air inducted into said engine, retarding timing of an ignition device coupled to combustion chambers of the engine, or adjusting timing of a device for injecting fuel into said engine.
1 more element
Dependencies are inferred from the claim text.