| 초록 |
The production of EV(Electric Vehicle) has rapidly increased in recent years because of its benefits to the environment. However, there have been a few problems regarding its commercialization, including its heavy weight and high cost compared to engine vehicles. Therefore, the top priority among vehicle systems, including chassis systems, is finding a way to reduce weight and cost. In this paper, a novel EPB(Electronic Parking Brake) system that will replace the existing EPB system is proposed. For this system, the high-performance actuator that is mounted on the DIH(Drum-in-hat) is newly designed. First, the two-step reduction gear is applied to the actuator to gain a high reduction gear ratio. Furthermore, we will optimize the shape of the actuator that will be mounted on the DIH in the rear wheel. By integrating the actuator with the DIH, the weight and cost of the EPB system will be remarkably reduced compared to the previous system. Second, the required performance of the developed EPB system, compared to the existing EPB system, will be verified with a variety of parts and vehicle unit tests, such as the uphill and downhill hold test, the noise test, the time test, etc. Finally, a new type of EPB system is expected to be widely used for EV and other low-cost vehicles, and will contribute to the standardization and modular design of the EPB system. |
