| 摘要 |
PURPOSE:To make a device small-sized and lightweight by providing liquid pressure control valves between a master cylinder and wheel cylinders of the right and left front wheels and preventing rear wheels from being locked by use of only these two liquid pressure control valves (two channels). CONSTITUTION:A control unit 31 is constituted with the first-third evaluation circuits 35a-35c, a logic circuit 36, and a motor drive circuit 37. The circuits 35a, 35c evaluate detection signals of wheel speed sensors 28a, 28b of the right and left front wheels respectively. The circuit 35b selects and evaluates the lower one of detection signals of wheel speed sensors 29a, 29b of the right and left rear wheels. Outputs of the circuits 35a-35c are fed to the logic circuit 36. The logic circuit 36 logically combines the evaluation result of the smaller one of wheel speeds of a pair of the rear wheels and the evaluation result of the front wheel on the same side as this rear wheel to issue a command controlling a liquid pressure control valve 4a or 4b and a command controlling the liquid pressure control valve 4b or 4a independently from the other side front wheel. |
