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Jianjun Y.J.,Xihua University | Jianjun Y.J.,Southwest Jiaotong University | Dawei D.,Southwest Jiaotong University | Zhongwei M.Z.,Sichuan Collaborative Innovation Center for Automotive Key Components | And 3 more authors.
International Journal of Heat and Technology | Year: 2016

In this paper, the vortex throttle model and the conventional throttle model were established and compared. Both the throttles' air flow within the model were simulated. Air flow velocity and flow were compared. The results show that, through the forming of a swirling motion of the air, the vortex throttle's air flow velocity and flow rate were increased at each same degree of valve opening. The vortex throttle's turbulent kinetic energy also helps the entry of air, thereby increasing the amount of air entering the engine. On this basis, engine performance tests were carried out on two engines installed with each type of throttle. Performance test results show that, under the same power and torque output, the economy of the engine was enhanced by the vortex throttle. The results of simulation analysis and performance tests show that the vortex throttle created a swirling motion, which increases the amount of intake air to improve engine performance.

Pang Y.,Xihua University | Pang Y.,Key Laboratory of Fluid and Power Machinery | Lai X.-D.,Xihua University | Lai X.-D.,Key Laboratory of Fluid and Power Machinery
Journal of Donghua University (English Edition) | Year: 2014

Supposing a typical case of mismatch between human actions and given situation, the appropriate driver support function was investigated in this paper. It was processed by calculating the conditional expectation of damage under different degrees of automation. The typical case was that the situation was detected to be in threat while the driver was detected not to take any corresponding action. Considering various realistic factors, preference order among different levels of automation was probabilistically analyzed. Different levels of automation under action type support were differentiated by human's reactions to the autonomous safety control actions which were taken by the computer. Copyright © 2014 Editorial Department of Journal of Donghua University. All rights reserved.

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