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| Slip temperature and lockup control of torque converter clutch under launching conditions |
| State Key Laboratory of Automotive Dynamic Simulation and Control, Jilin University, Changchun, Jilin 130022, China |
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Abstract To solve the low efficiency of vehicle equipped with AT under launching conditions, the TCCs slip and lock-up control technology was proposed. The slip and lock-up control simulation model of TCC was established to analyze the dynamic property and efficiency under launching conditions with constant engine speed as control target. The three-dimensional transient heat conduction finite element model was built by CFX. The slipping power was calculated and converted to heat flux on the surface of TTCs friction plate. The temperature of TTCs friction plate was obtained at different ATF oil temperature. The simulation results show that the TCCs slip and lockup control technology under launching conditions can effectively solve low efficiency of vehicles caused by torque converter. The maximum rising temperature of TCCs friction plate is 40 ℃. The TCCs slip and lockup control can be realized within the allowable temperature range of TTCs friction plate when the ATF oil temperature is low.The TCCs slip and lockup control is not suitable because the high temperature of TTCs friction plate exceeds the allowable range when the ATF oil temperature reaches 100 ℃.
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Received: 22 October 2012
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2013, Vol. 34 
