Development and Control of an Electric Oil Pump for Automatic Transmission-Based Hybrid Electric Vehicle

Author

Kim, Yeonho ; Lee, Jaesang ; Jo, Chihoon ; Kim, Yongha ; Song, Minseok ; Kim, Jonghyun ; Kim, Hyunsoo

Author_Institution

Hybrid Electr. Vehicle Design Team, Hyundai Kia R & D Center, Hwasung, South Korea

Volume

60

Issue

5

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

1981

Lastpage

1990

Abstract

We developed an electric oil pump (EOP) and a control algorithm for automatic transmission (AT)-based two-shaft parallel hybrid electric vehicles (HEVs). The EOP capacity was designed based on AT oil pump test results, and the torque of the EOP motor was determined by considering the flow rate and efficiency calculated according to the operating temperature of the AT fluid. A control algorithm consisting of low, high, and middle speeds according to the HEV driving mode was proposed for the operation of the designed EOP. Control logic was proposed to reduce the EOP energy requirements in the middle-speed range, in which the EOP and AT oil pump operate together. We verified that this control method could reduce electric load while supplying the required hydraulic pressure.

Keywords

hybrid electric vehicles; pumps; road vehicles; torque control; velocity control; EOP motor torque; HEV driving mode; automatic transmission-based hybrid electric vehicle; control logic; electric load; electric oil pump; high speed control; low speed control; middle speed control; Discharges; Engines; Hybrid electric vehicles; Pumps; Torque; Valves; Automatic transmission (AT); electric load; electric oil pump (EOP); hybrid electric vehicle (HEV);

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2011.2140135

Filename

5746540