Lockup Mechanism - Honda NSA700A DN-1 2009 Service Manual

LOCKUP MECHANISM

In the top ratio, there is no torque m ultiplication a3 the m otor side swash plate is not tilted. However, there is friction loss
and compression loss caused by oil circulation. The lockup mechanism improves the efficiency of the engine torque trans­
mission.
When the lockup solenoid valve applies hydraulic pressure to the actuator, the eccentric ring is moved to a concentric posi­
tion. As a result, the distributor valve closes the circuit between the oil pum p side cylinder (high pressure) and motor side
cylinder (low pressure), causing the HFT to be oil locked.
FROM
I
OIL PUMP
LOCKUP SOLENOID
VALVE
The lockup solenoid valve is controlled by the Transmission Control Module according to the engine speed, throttle posi­
tion, vehicle speed, angle of the oil m otor side swash plate, N/D position and riding mode.
ECCENTRIC RING
ACTUATOR
NO LOCKUP
(ECCENTRIC)
DISTRIBUTOR VALVE
HIGH-PRESSURE
CAVITY
LOW-PRESSURE
CAVITY
TECHNICAL FEATURE
LOCKUP
(CONCENTRIC)
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