Patent ID: 7690344
Filing Date: 2010-04-06
Classification: F02D,F02M,Y10T

Abstract:
1. A system for optimizing stop-and-go functionality in a vehicle having an automatic transmission and a direct-start engine, the system comprising: a controller operable for determining the presence of a current engine state; a motor having a shaft, the motor being energized when the controller determines the presence of a current engine state corresponding to one of a first and a second predetermined engine state; an integrated pump assembly including a high-pressure (HP) fuel pump that is selectively connected to the shaft for maintaining a threshold fuel pressure to a fuel rail during the second predetermined engine state, and a low-pressure (LP) fluid pump directly and continuously connected to the shaft for maintaining a threshold fluid pressure in the automatic transmission during each of the first and the second predetermined engine states; a cam; and a locking mechanism operable for transferring torque from the shaft to the cam for energizing the HP fuel pump only when the current engine state corresponds to the first predetermined engine state.