Shift Solenoid: Description and Operation

Description

TCU calculates the best condition using the information from all kinds of sensors. If the solenoid valve receives the information on the oil pressure, the solenoid valve actuates according to the driving signal. All kinds of regulators in the valve body are controlled to change the oil passage and also the line pressure is controlled by TCU.




● PWM (Pulse Width Modulation) Solenoid Valve

Structure and functions

PWM solenoid valve is composed of six solenoid valves and the oil capacity in the solenoid valve is changed by the electric duty value of TCM. The oil pressure of the valve body and the torque converter engages or disengages the damper clutch. The solenoid valves send the operating oil pressure to the clutches and brakes at each range and also control the strength and weakness of oil pressure to reduce shock when shifting.








PWM (Pulse Width Modulation) solenoid





O : ON
X : OFF

PWM (Pulse Width Modulation) Solenoid Valve Control Feature




PWM solenoid valve is controlled linearly according to the duty ratio.

Oil pressure range:
0 - 4.3 kgf/cm2 (0 - 422kpa, 0 - 61.2psi)