After analyzing the loader duty cycle with hybrid drive theory and gaining the characteristics of loader duty cycle, an integrated started generator-ISG based coaxial parallel hybrid loader is designed. Two simulation models are built with the simulation software Cruise, one is tradition loader another is hybrid loader. The simulation result of tradition loader model compare with the test data to amend the model. To gain same accuracy, the hybrid loader model is rebuilt based on the tradition loader model. According to the “I” type duty cycle, comparing the simulation result of tradition and hybrid loader, the result shows that hybrid loader can save fuel 10.4%.

The evaluation of lubricating effect of the transmission lubrication system is an important part in the transmission design. The Ansys-Fluent software is used in this paper. Firstly, the flow field of the single oil orbit of 7DCT transmission is simulated and the mass flow rate of each nozzle is taken as the input condition of the lubricating simulation and analysis in the whole transmission model. Then the whole transmission model is established to facilitate evaluating the lubricating effect of the oil catcher by setting the monitor surfaces at the positions of the oil catcher. The complex oil and gas phase flow field of transmission is simulated and analyzed so that the lubrication effects of three lubricating method are evaluated to achieve the purpose of evaluating the performances of the transmission lubrication system, including the forcing ejective oil lubrication, splash lubrication and oil passage lubrication.

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