ENGINE ACCESSORY DRIVE SYSTEM

摘要

An electrified engine accessory drive (EEAD) system is provided that replaces the front engine accessory drive (FEAD) components (e.g., a/c compressor, air brake compressor; power steering pump, etc.) on vehicles, such as heavy duty trucks. Using such an EEAD system aims to reduce parasitic losses induced on a conventional engine by the front engine accessory drive (FEAD) while providing additional benefits, such as engine off vehicle and/or system operation. The EEAD systems may also be used in lieu of rear-end accessory drives and other accessory drives powering multiple accessories from a common driveshaft.

主权项

1. A vehicle, comprising:
a driveline including a drive shaft and at least one driven wheel; a prime mover configured to provide power to the driveline to provide motive force to the vehicle; a plurality of vehicle accessory components; a controller coupled to the prime mover, wherein the controller is configured to control at least one operation of the prime mover; and an accessory drive unit disposed a spaced distance from the prime mover and discrete therefrom, the accessory drive unit comprising:
an electric motor;a transmission coupled between the electric motor and the plurality of accessory components in order to transfer the output of the electric motor to the plurality of accessory components; anda plurality of electronically controlled coupling devices associated with the plurality of accessory components, wherein each electronically controlled coupling device is configured to selectively couple a corresponding accessory component to force transmitted by the transmission, and wherein the controller is configured to control operation of the plurality of electronically controlled coupling devices.