AUTOMATIC TRANSMISSION
05–13–36
DIRECT ELECTRONIC SHIFT CONTROL OPERATION
CHU051318901S10
• In the previous system, line pressure passages are switched with a combination of on/off shift solenoids and
shift valves to engage the clutch. In the new system, clutch pressure is regulated for each clutch and brake with
a combination of duty cycle shift solenoids and amplifier valves.
• When shifting from 2GR→ 3GR, 3GR→4GR, 3GR→2GR, 4GR→3GR, engagement- and release-side clutch
pressures are simultaneously controlled according to throttle opening angle and vehicle speed, as well as
clutch pressure supply and extent of gear shift. As a result, the capacity of torque for both clutches can be
regulated optimally during switching of clutch pressure (switching of engagement clutch) to prevent engine
flare-up and dragging during shifting for smooth and responsive shifting.
End Of Sie
SOL
SOL
SOL
SOL
SOL
SOL ON/OFF SOLENOID
DUTY CYCLE SOLENOID
SOLENOID PRESSURE
LOWER PASSAGE
OPENS WHEN
SOLENOID
PRESSURE ACTS
UPPER PASSAGE
OPENS WHEN
SOLENOID PRESSURE
DOES NOT ACT
CLUTCH
MANUAL SHIFT VALVE
OIL PUMP
DRAIN
PRESSURE
REGULATOR
VALVE
ACCUMULATOR
OIL PUMP
PRESSURE
REGULATOR
VALVE
SPRING
AMPLIFIER VALVE
DRAIN
DIRECT ELECTRONIC SHIFT CONTROL
PREVIOUS
DRAIN
CLUTCH
DRAIN
CHU0513S056
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