Optimization of speed fluctuation of internal combustion engine range extender by a dual closed-loop control strategy Tongji Univ

Format:

Book

Conference/Event

Author/Creator:

Li, Minglong, author.

Contributor:

Ding, Weiqi

Hu, Zongjie

Li, Liguang

Yuan, Dengke

Zeng, Xingyu

Zhong, Zaimin

Conference Name:

SAE WCX Digital Summit (2021-04-13 : Live Online, Pennsylvania, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

With the increasing concern on environmental pollution all over the world, range-extended electrical vehicle (REEV) has gradually got more attention because it could avoid the mileage anxiety of the pure electric vehicles and get high energy efficiency. But NVH performance of internal combustion engine range extender (ICRE) is a critical problem that affects the driving experiences for REEV.In this paper, a two-cylinder PFI gasoline engine and a permanent magnet synchronous motor (PMSM) are coaxially mounted. The ICRE control system was established based on Compact RIO and LabVIEW, who has the functions of the intake throttle PI closed-loop control, autonomous ICRE operation control, and speed PI closed-loop control, et cetera During experiments, the engine was first driven by PMSM to idle condition. To study the speed fluctuation control of ICRE, the PMSM control model was switched from speed-control model to torque-control model after the steady idle condition. Then the steady states of a low-power and a high-power working condition were optimized by a new dual close-loop control to reduce their speed fluctuations, and the switching process between the two steady states were further optimized by the dual closed-loop control strategy. The characteristics of ICRE speed fluctuation and charging process of batteries were also investigated.The results show the speed fluctuation amplitude could be reduced by 30% at the low-power operating point and by 41.7% at the high-power operating point with the optimal PI parameters of the dual close-loop control strategy. During the switching process from low-power condition to high-power condition, the speed response time and overshoot rate can be reduced to 2.1s and 2.7% respectively

Notes:

Vendor supplied data

Publisher Number:

2021-01-0782

Access Restriction:

Restricted for use by site license