Modeling of Hydraulic Clutches in Hybrid Electric Power System

• Main Authors: Hung Lin, 林弘
• Other Authors: Chia-Jui - Chiang
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/x3x5qq

碩士 === 國立臺灣科技大學 === 機械工程系 === 107 === In view of the global energy scarcity, rising international oil prices, how to effectively save energy and find new alternative energy sources to reduce dependence on fossil fuels, is currently an urgent problem to be solved. With the increasing use of fossil fuels, pollution that is harmful to the environment has also risen. In recent years, the impact of the greenhouse effect is far greater than we thought, so these issues can no longer be ignored. CO2 and HC are the most important part of the greenhouse gas. Therefore, if we can use hybrid way to drive the car, it will not only help to improve the greenhouse effect, but also provide energy application. In a hybrid vehicle, it is often necessary to switch the mode, and in many systems the clutch is the most important part for the mode switching. By means of the clutch engagement or disengagement, the mode switching function can be achieved. The clutch must be smoothly engaged while controlling the slip ratio and the clutch thrust force. If the force applied to the clutch is raised instantaneously, it may lead to clutch wear, energy loss and vibration. On the other hand, if the engagement duration is too long, it may delay the mode switching process. In view of this, based on the clutch system provided by HAITEC, a hybrid vehicle mode switching control strategy will be developed. Specifically, the solenoid valves will be used to control the pressures in the hydraulic system so as to achieve smooth engagement and disengagement of the clutches. As the mode switching control will lead to changes in speed at both ends of the clutch and the bonding time may also affect the overall transmission performance, it is necessary to develop a controller that achieves the goals of minimizing the engaging time and reducing the slip ratio. For the purpose of the above mentioned control development, a controloriented model for the clutch system will be first developed and validated using the platform provided by HAITEC. Based on the model, an adaptive control algorithm can then be developed.