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US 2011/0253099 A1Published application
Multi-phase engine stop position control
AssigneeGM Global Technology Operations LLC
InventorsJun Han, Lan Wang, Goro Tamai
Life of this patent
Estimating the term…
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AssigneeGM Global Technology Operations LLC
InventorsJun Han, Lan Wang, Goro Tamai
Estimating the term…
A method is provided for controlling engine stop position in a vehicle having an engine with auto stop/auto start functionality. The method includes automatically ramping down engine speed upon initiation of an auto stop event, executing closed-loop speed control of the engine when the engine speed begins to ramp down, and for as long as the engine speed remains above a threshold engine speed while ramping down the engine speed; executing closed-loop position control of the engine while ramping down the engine speed once the engine speed is less than the threshold engine speed and greater than zero; and stopping the crankshaft to within a calibrated range of a targeted engine stop position. A controller is also provided that includes a hardware module and an algorithm adapted for executing the foregoing method, and a vehicle is provided having an engine with auto stop/start functionality and the controller noted above.
A method for controlling an engine stop position in a vehicle having an engine with auto stop/auto start functionality and a crankshaft, the method comprising:
A controller for use aboard a vehicle having an engine with a crankshaft and auto stop/auto start functionality, the controller comprising a hardware module and an algorithm adapted for controlling a cranking position of the engine during an auto stop event, wherein the algorithm is adapted for:
A vehicle comprising:
The vehicle of claim 14, wherein the algorithm is further adapted for switching back to closed-loop speed control of the engine once the engine speed equals zero.
Dependencies are inferred from the claim text.