油圧式.機械式ハイブリッド制動装置を使用した小型電気自動車のスキッド制御技術に関する研究: 二輪モデル用アンチロックブレーキシステム油圧系のシミュレーション

Abstract

In recent years, hybrid vehicles and electric vehicles are becoming increasingly popular as a means of improving environmental problem. Many researches are being conducted on next generation vehicles in the area of intelligent transportation systems (ITS). It therefore seems reasonable to assume that next generation ITS vehicles and commuter cars for city use would be electric. The drive method of electric vehicles is divided broadly into two categories. In the first case, a drive motor is installed at the differential gear of a former vehicle. The motor therefore is set at the center of drive axle. This type has efficient because it applies the conventional technology of power trains. However, the transfer energy loss and system weight are greater than the second type, the cargo space is also small. In second case, the drive motor is installed at the wheel of the tire. We call this type "in-wheel motor system". The transfer energy loss and we""" ight of this system are very small. But electric vehicles with the in-wheel motor system use hydraulic and mechanical brakes, so it is difficult to establish ABS. The aim of this research is to establish the skid control of small electric vehicles with hydraulic-mechanical hybrid brake system, and improve safety. This report discusses the hydraulic simulation of ABS for two-wheel models, and simulations the pressure control, and confirms the validity of increasing pressure in the simulations.