Fuel Economy Optimization for Parallel Hybrid Vehicles with CVT 1999-01-1148
A new fuel economy optimization method for parallel hybrid electric vehicles with continuously variable transmission( CVT) is proposed in this paper. The method maximizes overall system efficiency while meeting desired performances. Firstly, effective specific fuel consumption (ESFC) is defined as effectively consumed fuel per output power-hour from a hybrid propulsion system, in which battery output power is transformed into an equivalent amount of fuel. Hence, hybrid optimal operation line(HOOL) is derived based on ESFC as optimal operation line(OOL) is found based on specific fuel consumption( SFC) in a conventional internal combustion engine(ICE) vehicle with CVT. From HOOL, optimal combinations of control variables, CVT gear ratio, motor torque and engine throttle, are obtained versus vehicle velocity, battery state of charge and required power. A simulation study with the proposed optimization method is performed to prove its validity.
Citation: Kim, C., NamGoong, E., Lee, S., Kim, T. et al., "Fuel Economy Optimization for Parallel Hybrid Vehicles with CVT," SAE Technical Paper 1999-01-1148, 1999, https://doi.org/10.4271/1999-01-1148. Download Citation
Author(s):
Chunho Kim, Eok NamGoong, Seongchul Lee, Talchol Kim, Hyunsoo Kim
Affiliated:
KIA Motors Corp., Sung Kyun Kwan University
Pages: 9
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Electric and Hybrid-Electric Vehicles-PT-85, 1999 Transmission and Driveline Systems Symposium-SP-1440, SAE 1999 Transactions - Journal of Passenger Cars-V108-6
Related Topics:
Continuously variable transmissions
Hybrid electric vehicles
Fuel consumption
Fuel economy
Optimization
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