Qijiang Gear Company

Chongqing, China

Qijiang Gear Company

Chongqing, China
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Ruan D.,Chongqing University | Li Q.,Delphi Corporation | Zhang X.,Qijiang Gear Company | Chen S.,Qijiang Gear Company
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2013

The high and low gears shifting synchronous time of the rear auxiliary transmission for a heavy-duty truck transmission was studied based on theoretical analysis, numerical simulation and experimental research. Compared with the experimental results, the relative errors of the theoretical analysis results of the synchronous time from high to low gears and from low to high gears are larger, 16% and 11% respectively. On the basis of ADAMS software, the relative errors of the simulation results of the synchronous time in both of the rigid body model and the rigid-flexible coupling model where ring gear flexibility was considered, are smaller than those of the theoretical analysis. The relative errors of the simulation on the synchronous time in the rigid body model from high to low gears and from low to high gears are 11% and 7% respectively, while those in the rigid-flexible coupling model are 4% and 3% respectively, which are the smallest among the three models.


Ruan D.,Chongqing University | Liu B.,Chongqing University | Chen Z.,Qijiang Gear Company | Zhang X.,Qijiang Gear Company | Zhang Y.,Qijiang Gear Company
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2011

On the basis of analyses on the power losses and the heat transfer in lubrication system of a heavy-duty automobile transmission, a heat balance simulation model for the lubrication system was established with the software AMEsim and then the simulations were completed under several operation conditions. In order to verify the simulation model, an experiment was conducted at no-load and in direct drive. The results show that the balance temperature at high-speed and light-load or high-speed and high-load is much lower than the highest temperature at which the transmission can operate normally; the temperature of the lubricating oil goes up very quickly and reaches the limiting value in about 30 minutes at high load and in first gear; the simulation results of the balance temperature are coincide well with the experimental ones at no-load and in direct drive, and the relative error is less than 2%.

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