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Deng T.,Chongqing Jiaotong University | Hu F.,Beiqi Foton Automotive Engineering Research Institute | Sun D.,Chongqing University
Qiche Gongcheng/Automotive Engineering | Year: 2012

Based on the real structure and constraint condition of wet multi-disc clutch, a transient thermal-structure coupling simulation of the clutch at its slipping phase is conducted with ANSYS/LS-DYNA to analyze the hot spot distribution on steel discs and compare the surface temperature distribution of steel discs with different thicknesses and surface widths. Finally, the effects of the dimension of steel disc on thermoelastic instability phenomenon are analyzed with a real example. Source


Deng T.,Chongqing Jiaotong University | Hu F.,Beiqi Foton Automotive Engineering Research Institute | Sun D.,Chongqing University
Applied Mechanics and Materials | Year: 2012

Based on the analysis of Dual clutch transmission (DCT) working principle, the shift kinetics model is established, and the power switching rule between two clutches during upshift and downshift is established by analyzing the torque transmission relationship of vehicle driveline system during shifting, then shift process is tested on actual vehicle with Matlab/Simulink software. Comparing the two different kinds of downshift processes, and illuminating the effect on engine control by various downshift control rules, the downshift process is optimized. Source


Liu H.,Tianjin University | Zhang J.-H.,Tianjin University | Bi F.-R.,Tianjin University | Shi Y.,Tianjin University | Ma W.-R.,Beiqi Foton Automotive Engineering Research Institute
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | Year: 2011

Multi-body dynamic analysis method was used to solve the piston lateral force and main bearing load under the excitation of combustion forces. Multi-body dynamic response analysis and finite element analysis method were used to solve the engine surface vibration response excited by combustion and mechanical forces. Surface vibration measurement technique was used to predict the sound power of radiation noise. The improved noise reduction design for the engine block is proposed, and A-weighted sound power level of radiation noise is reduced by 3. 24, dB. The radiated noise prediction method provides a new approach for engine noise prediction and control in the design stage. Source

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