Line Pressure Optimal Control

The line pressure is controlled by using solenoid valve SLT. Through the use of solenoid valve SLT, the line pressure is optimally controlled in accordance with the engine torque information, as well as with the internal operating conditions of the torque converter and the transaxle. Accordingly, the line pressure can be accurately controlled in accordance with the engine output, traveling condition, and the ATF temperature, thus realizing smooth shift characteristics and optimizing the workload of the oil pump.

Line Pressure

Solenoid Drive Signal

Line Pressure

Solenoid Drive Signal

Input Turbine Speed ATF Temp._

Shift Position

Throttle Valve Opening Intake Air Mass

Engine Coolant Temp. Engine Speed

Input Turbine Speed ATF Temp._

Shift Position

Throttle Valve Opening Intake Air Mass

Engine Coolant Temp. Engine Speed

01YCH27Y

*: This diagram illustrates the fundamentals of Line Pressure Control. The valve shapes differ from the actual ones.

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