| 摘要 |
An anti-lock hydraulic control device (21) is composed of a front-wheel brake (25A; 26A) and rear-wheel brake (25B; 26B) for effecting brake control through a hydraulic system which is connected with a master cylinder (22) and circulates hydraulic fluid; a front-wheel side control valve (27A; 27C) and rear-wheel side control valve (27B; 27B) between the master cylinder (22) and front-wheel brake (25A; 26A), and master cylinder (22) and rear-wheel brake (25B; 26B) respectively; a reserve (28A; 28B) between the front-wheel side control valve (27A; 27C) and rear-wheel side control valve (27B; 27D); a proportioning valve (30A; 30B) between the master cylinder (22) and rear-wheel side control valve (27B; 27D); and a pump (29A; 29B) connected to the reserve (28A; 28B) and provided with a discharge opening (29A-1, 29B-1) connected between the proportioning valve (30A; 30B) and the rear-wheel control valve. When anti-lock control starts, the pump (29A; 29B) operates and discharges hydraulic fluid to the rear-wheel side control valve (27B; 27D), thus increasing rear-wheel brake fluid pressure, and so avoiding the problem of insufficient braking power in the rear-brakes (25B; 26B) during anti-lock control, and increasing braking efficiency. <IMAGE> |
