Motor Control of a Parallel Hybrid Electric Vehicle during Mode Change without an Integrated Starter Generator

Abstract

-In this paper, a motor control algorithm for performing a mode change without an integrated starter generator (ISG) is suggested for the automatic transmission-based hybrid electric vehicle (HEV). Dynamic models of the HEV powertrains such as engine, motor, and mode clutch are derived for the transient state during the mode change, and the HEV performance simulator is developed. Using the HEV performance bench tester, the characteristics of the mode clutch torque are measured and the motor torque required for the mode clutch synchronization is determined. Based on the dynamic models and the mode clutch torque, a motor torque control algorithm is presented for mode changes, and motor control without the ISG is investigated and compared with the existing ISG control.

Improvement of battery charging efficiency using 2-clutch system for parallel hybrid electric vehicle

“…1) is connected to the engine through a belt drive. When the mode shift begins, the ISG operates to increase the engine speed to the target speed for the engagement of the engine clutch [3]. Another important role of ISG is to charge the battery as a generator The battery SOC(state of charge) might be lower than the lower-limit.…”

Fuzzy sliding mode control for smooth mode changes of a parallel hybrid electric vehicle

“…In [11], a PI feedback controller is used to reduce the speed difference between the two ends of the clutch. More recently in [12], a hybrid power system without engine starter is proposed and a smooth mode change strategy using the motor on the other end of the clutch is developed.…”

“…Recently, the drivability and NVH especially during mode changes of HEVs have drawn a lot of attention [3,[7][8][9][10][11][12]. In [3], model predictive control is applied for clutch engagement control in a HEV based on a simplified drivetrain model.…”

A Control Strategy for Mode Transition with Gear Shifting in a Plug-In Hybrid Electric Vehicle

“…Some researchers proposed that engine torque error and clutch friction torque are compensated for by using the torques of integrated starter and generator (ISG) and the electric motor [9]. Other researchers suggested having the HEV system without ISG by controlling the tractive motor for synchronization of clutch speeds, while it sustained low driveshaft acceleration [10].…”