PROJECT TITLE :
Feasibility Assessment and Design Optimization of a Clutchless Multimode Parallel Hybrid Electric Powertrain
The fuel economy (FE) of the parallel hybrid electric vehicle (HEV) suffers because of important energy losses from the wet clutches of the automatic transmission and restricted engine operations. To overcome these limitations, a novel clutchless multimode parallel HEV (CMP-HEV) was proposed previously, however its operational feasibility was not proven. During this study, we tend to propose a scientific methodology which will assess the feasibility of the CMP-HEV and efficiently optimize FE and acceleration performance of the planning, simultaneously. Using the dynamic models, we tend to assess the feasibility over the entire style spaces beneath two conditions: full acceleration (for drivability) and moderate acceleration (for fuel efficiency). An instantaneous optimization method is employed to rapidly evaluate the full acceleration performance, and therefore the designs with poor acceleration are considered infeasible. For the fuel efficiency, the feasibility is set by the violation of electric motor constraints beneath the belief of efficient engine operations. The feasible design sets from the assessment are used for the look optimization. Dynamic programming is applied over solely the possible style house, and the Pareto front is obtained to show the tradeoff between FE and acceleration performance. The selected final style is found superior to a comparable parallel HEV in both FE and acceleration performance perspectives.
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