Electrification of accessories (i.e., engine water pump, air-conditioner) in electrified vehicles is an enabler for increased system efficiency and higher fuel economy. This is achieved by eliminating the front-end accessory drive (FEAD), a source of engine friction, and more efficiently operating the devices that would have been driven by the FEAD at constant speeds relative to engine speed. Offsetting the efficiency benefit is a potential increase in cost. In this work, we investigate implementation of a dual-function e-Accessory drive that can independently drive an accessory component and also supplement the capability of the electric drive system for propulsion. The potential CO2 benefit of such a system relative to other propulsion configurations is assessed via simulation for the case of a 48V hybrid vehicle. An experimental system is also developed to demonstrate and assess basic functionality. Additionally, an extension of such a system to battery electric vehicles is also presented, wherein the air-conditioner compressor motor is clutch-able and can selectively provide traction assist to the driveline.
Electric Accessories for Hybrids and BEVs
Mechan. Machine Science
IFToMM World Congress on Mechanism and Machine Science ; 2023 ; Tokyo, Japan November 05, 2023 - November 10, 2023
2023-11-05
11 pages
Article/Chapter (Book)
Electronic Resource
English
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