Title :
Diesel engine ripple torque minimization for parallel type hybrid electric vehicle
Author :
Lee, Hyeoun-Dong ; Sul, Seung-Ki
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
In this study, a real-time ripple torque minimization method for a parallel type hybrid electric vehicle is presented. After estimating the diesel engine ripple torque from real engine speed, a negative sign of estimated ripple torque is commanded to the electric machine which is directly coupled to the engine shaft. Thus, a prominent reduction of ripple torque results and speed fluctuations are remarkably reduced. Moreover, because it is possible to reduce the size and weight of the conventional flywheel, and thereby the energy losses in the flywheel every time the vehicle accelerates or decelerates, the overall driving efficiency of the hybrid electric vehicle is improved
Keywords :
electric propulsion; electric vehicles; flywheels; internal combustion engines; machine control; minimisation; torque control; traction motor drives; diesel engine ripple torque; driving efficiency; electric machine; energy losses; flywheel; hybrid electric vehicle; real-time ripple torque minimization; traction motor drive; Diesel engines; Electric machines; Energy loss; Fluctuations; Flywheels; Hybrid electric vehicles; Minimization methods; Shafts; Torque; Vehicle driving;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.628974
