Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)
- Volume 9 Issue 1
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- Pages.112-121
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- 2001
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- 1225-6382(pISSN)
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- 2234-0149(eISSN)
Engine-CVT Integrated Control Algorithm Considering Power train Loss and CVT Response Lag
동력전달계 동력손실계 CVT 응답지연을 고려한 엔진-CVT 통합제어 알고리즘
Abstract
In this paper, an engine-CVT integrated control algorithm is suggested by considering the powertrain loss, inertia torque and the CVT ratio response lag. The integrated control algorithm consists of (1) the optimal engine power calculation and (2) determining of the optimal throttle valve opening and the optimal CVT ratio. The optimal engine power is obtained by compensating the inertia torque due to the CVT ratio change and the powertrain loss that is calculated iteration procedure. In addition, an algorithm to compensate the effect of the CVT ratio response lag on the drive torque is suggested by the engine speed compensation causing the increased optimal CVT ratio. Simulation results show that the engine-CVT integrated control algorithm developed in this study makes it possible to obtain better engine operation on the optimal operating line, which results in the improved fuel economy while satisfying the driver's demand.
Keywords