| 摘要 |
PURPOSE:To make smooth starting at a low mu climbing road performable, by releasing all braking hydraulic pressure at the driven wheel side at one at time of starting at the climbing road, while making the braking hydraulic pressure at the driving wheel side decompress slowly till rotation of a driving wheel is detected. CONSTITUTION:A driving wheel brake cylinder 3 is connected to one side oil chamber of a tandem type master cylinder 2 via a normally opened type solenoid valve Y while a driven wheel brake cylinder 4 to the other side oil chamber via a normally opened type solenoid valve Z, respectively. And, at time of car stoppage, the solenoid valve Y as an auto-stop valve is opened and thereby braking hydraulic pressure for driving wheel use is controlled so as to be confined. At the above-mentioned, at time of car starting, this confined braking hydraulic pressure is slowly made to decompress till rotation of a driving wheel 5 is detected. Next, after this hydraulic pressure is kept up, the solenoid valve Y is controlled so as to release this hydraulic pressure to the full when rotation of a driven wheel 6 detected at a sensor 8. |
