SYNCHRONIZED ACCESSORY DEVICES DRIVE SYSTEM WITH OPTIMIZED SWITCHING BETWEEN DRIVE SOURCES FOR THE DRIVE SYSTEM

摘要

An accessories drive system, including: a accessory device; and a clutch assembly including: an electric machine; a drive shaft connected to the machine and accessory device; at least one clutch; and a control unit to: connect, using the clutch, the drive shaft to the crankshaft or the input shaft; rotate the drive shaft with the crankshaft or the input shaft; disconnect, using the clutch, the drive shaft from the crankshaft or the input shaft; accelerate or decelerate, using the machine, rotation of the drive shaft at a first absolute rate less than a second absolute rate of acceleration or deceleration of the engine or the input shaft; and when a speed of rotation of the drive shaft is within a predetermined range of a speed of rotation of the crankshaft or the input shaft, close the clutch to engage the drive shaft with the crankshaft or the input shaft.

主权项

1. An accessories drive system for a vehicle, comprising:
at least one accessory device; and, a clutch assembly including:
an electric machine;a drive shaft connected to the electric machine and the at least one accessory device and arranged to provide torque to the at least one accessory device;at least one clutch arranged to connect and disconnect the drive shaft with respect to:
an input shaft for a transmission for the vehicle; or,a crankshaft for an engine for the vehicle; and,at least one control unit, configured to:
connect, using at least one clutch, the drive shaft to the crankshaft or the input shaft;rotate the drive shaft with the crankshaft or the input shaft;disconnect, using the at least one clutch, the drive shaft from the crankshaft or the input shaft, respectively;accelerate or decelerate, using the electric machine, rotation of the drive shaft at a first absolute rate less than a second absolute rate of acceleration of deceleration of the engine or the input shaft; and,when a speed of rotation of the drive shaft is within a predetermined range of a speed of rotation of the crankshaft or the input shaft, close the at least one clutch to engage the drive shaft with the crankshaft or the input shaft.