In this paper, a methodological approach has been presented for the simultaneous optimal gear ratio and gearshift strategy design of a parallel HEV (hybrid electric vehicle) equipped with a double-sided clutch AMT (Automated Mechanical Transmission). In this approach, the model of an AMT with a double clutch has been developed and integrated with the vehicle model. In addition, the optimal selection of the parameters for the design of the gear ratios and gearshift of a double sided clutch AMT is formulated as an optimisation problem where the HEV fuel consumption and emissions are considered as the performance indices. A GA (Genetic Algorithm) optimisation process has then been performed for different driving conditions of the TEH-CAR driving cycle via three steps: gearshift optimisation, gear ratio optimisation and simultaneous optimisation. Simulation results reveal that the design process is affected by traffic conditions. In other words, the AMT shifting requires an adaptive strategy based on driving conditions. The results are validated in drive cycles which are similar in characteristics to Tehran driving conditions. The results reveal that optimum gearshift strategy and gear ratios improve fuel economy and emissions not only in Tehran driving conditions, but also in other similar driving conditions. In addition, the optimal design has improved fuel economy, especially incongested conditions. In this case, fuel consumption decreases by about 13%. This considerable improvement is due to the tuning of the gearshift strategy as well as selection of the optimum gear ratios which lead to the shift of operating points of the ICE to the optimal operating region. This investigation can be followed to compare the DCT (Dual Clutch Transmission), DSCT (Double-Sided Clutch Transmission), CVT (continuously variable transmissions) and planetary HEV as further works.
Simultaneous design of the gear ratio and gearshift strategy for a parallel hybrid electric vehicle equipped with AMT
Simultaner Entwurf der Getriebeübersetzung und Schaltstrategie für ein Parallelhybridfahrzeug mit automatisiertem Schaltgetriebe
International Journal of Vehicle Design ; 58 , 2-4 ; 291-306
2012
16 Seiten, 13 Bilder, 6 Tabellen, 20 Quellen
Aufsatz (Zeitschrift)
Englisch
genetischer Algorithmus , Anwendung im Fahrzeugbau , Anwendung in der Elektrotechnik und Elektronik , Getriebeübersetzung , Parallelhybridantrieb , Hybridfahrzeug , simultane Entwicklung , automatisiertes Schaltgetriebe , Konstruktionsmethodik , Entwurf , technische Entwicklung , Fahrzyklus , Optimierungskonzeption , Schaltgetriebe , Kraftstoffverbrauch
GEARSHIFT CONTROL SYSTEM FOR HYBRID-DRIVE ELECTRIC VEHICLE
Europäisches Patentamt | 2018
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