Power Assist Recuperation System (PARS™) for automotive fuel saving and e-boost

A novel Power Assist Recuperation System consisted of motor, inverter, DC-DC converter and 48V Li-ion battery has been presented for fuel saving of conventional Internal Combustion Engine and hybrid vehicles. As a total solution of the next-generation 48V PARS, key components such as Permanent Magnet motor, MOSFET power switching inverter and bi-directional DC-DC converter with cost competitiveness from in-house power IC´s and power modules have been optimized based on the 48V battery pack for quick charge and discharge. A deep flux weakening control has been evaluated for the PM motor´s high speed operation. The specific value of how much the proposed 48V PARS can reduce CO₂ emission and fuel consumption was numerically simulated by using both motoring and generating efficiency maps as input data. It is noticed that the present 48V PARS gives a considerably enhanced performance in fuel saving by as high as 17% for a commercial 1.8L gasoline engine during the Urban Dynamometer Driving Schedule mode.