| 摘要 |
<p>PURPOSE:To eliminate a dead period as well as to contrive at improvement in hydraulic responsiveness by performing the intake and discharge of pressure oil at plural pressure oil intake and discharge time rates temporarily in a process that varies time mean pressure in a load pipeline system from a first value to the second one. CONSTITUTION:A time control unit 16 varies time mean pressure in a load pipeline system of a damper clutch 28 of a torque converter 20 from a first value to the second one according a speed change by a duty ratio signal to a solenoid valve 54 via a control valve 52. In this process, temporarily the intake and discharge of pressure oil in the load pipeline carried out at plural time rates different from first and second pressure oil intake-discharge time rates, if possible, such one including the value that the pressure oil intake time rate is substantially 100% or the discharge time rate is substantially 100%. In this connection, even in a hydraulic circuit 40 of a mechanical gear shifter 30, similar control takes place. Thus, an electrohydraulic responsive delay is eliminated to the utmost, and improvement in hydraulic responsiveness is contrived.</p> |
