Patent ID: 8770173

Claim:
A vehicle comprising: an engine with a crankshaft and auto start/auto stop functionality; a transmission having a transmission state; and a proportional-integral (PI) controller adapted for controlling a cranking position of the engine during an auto stop event, wherein the PI controller is in communication with the engine, and is configured for: 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; setting an I-term of the PI controller as a function of at least the transmission state and a speed of the vehicle; after setting the I-term, executing closed-loop position control of the engine while ramping down the engine speed when a predetermined condition is detected; and stopping the crankshaft to within a calibrated range of a targeted engine stop position.