FORWARD/BACKWARD MOVEMENT CONTROLLING SYSTEM OF POWER TRNSMISSION SYSTEM

摘要

PURPOSE: A forward/backward movement controlling system of power transmission system is provided to stably maintain forward/backward moving or neutral states without concerning to vibration or shaking of a vehicle or a ship. CONSTITUTION: A forward/backward movement controlling system of power transmission system comprises a forward/backward moving solenoid valve(39) and an accumulator(68) installed therein. The solenoid valve(39) is installed on a pressure line(32) between a direction converting valve(38) and a valve(30) and alternatively controls the direction converting valve(38) to left/right direction. The accumulator(68) is installed on a forward/backward movement pressure lines(58,62) connected to the direction converting valve(38) from forward/backward movement clutches(56,60) by forming a confluent pressure line(66) by using a shuttle valve(64). The forward/backward moving solenoid valve(39) has a forward moving solenoid valve(40) and a backward moving solenoid valve(44). The forward moving solenoid valve(40) is connected to a forward movement side hydraulic part of the direction converting valve(38) through a forward movement signal line(42). The backward moving solenoid valve(44) is connected to a backward movement side hydraulic part of the direction converting valve(38) through a backward movement signal line(44).