| 摘要 |
PURPOSE:To recover the brake energy more efficiently by a regenerative brake device and improve the responsiveness of a friction brake device. CONSTITUTION:When the first electromagnetic opening/closing valve 14 is set at a cut-off position 11, the brake liquid supplied from a master cylinder 10 is supplied into a brake cylinder 28, passing through the passage 22 of a brake transmission controller 12, and the loss stroke of the brake cylinder 28 is dissolved. Up to the time when the input pressure as the master cylinder pressure exceeds the first set pressure P1, the first check valve 23 is opened, and the output pressure of a brake pressure transmission control part increases in proportion to the input pressure. When the input pressure exceeds the first set pressure P1 the first check valve 23 is closed, and the output pressure is kept constant free from increase, even if the input pressure rises. When the input pressure exceeds the second set pressure P2, the first piston 20 lowers, Accordingly, the brake cylinder pressure is generated, and a frictional brake is operated. |
