Noise and vibration are used by customers to judge the quality or reliability of a vehicle. Uneven engine startstop transitions in a vehicle are perceived as noise or vibration concerns and can cause ride discomfort. Effectively diminishing uneven transitions is critical to customer satisfaction. This paper focuses on dynamic behaviour analysis and vibration reduction for engine automatic start-stop transitions in a TMH vehicle. The study investigates a control strategy, the PC algorithm, to create a smooth engine start-stop transition. Based on the real-time performance feedback from an engine, the required anti-vibration torque was calculated and applied to the system by electric motors. The study also used a DBC (damper-bypass clutch) to eliminate damper modes and to minimize variation in the engine speed and vibration of the seat track. PC balances most of the instantaneous ripples in the engine torque acting on the engine block. Combining PC and a DBC minimized fluctuations in the torque and smoothed engine automatic start-stop transitions. The peak-to-peak acceleration value of the seat track also decreased. Baseline simulation results were compared with vehicle measurement data, verifying a good correlation between the two. The analysis showed that the baseline performance, without any control algorithm, is sensitive to the initial crank angle. The overall improvement in a controlled automatic start was approximately 70% at various initial crank angles. In future research, vehicle hardware tests should be performed to validate the effectiveness of the control algorithms.
Engine automatic start-stop dynamic analysis and vibration reduction for a two-mode hybrid vehicle
2013
10 Seiten, 13 Bilder, 1 Tabelle, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
Engine automatic start–stop dynamic analysis and vibration reduction for a two-mode hybrid vehicle
SAGE Publications | 2013
|Hybrid vehicle engine start-stop dynamic control method
Europäisches Patentamt | 2021
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