Vct Control - Yamaha F200B Service Manual

VCT control

In VCT control, the engine ECM determines the appropriate intake valve opening timing according
to the signals from the sensors. According to the engine operating conditions, the OCVs are oper-
ated and the VCT assemblies advance and retard the intake valve opening timing in order to
increase the intake and exhaust efficiency at low and mid-range engine speeds and obtain greater
acceleration.
Pulser coil
Cam position sensor
(PORT EX)
Cam position sensor
(PORT IN)
Cam position sensor
(STBD IN)
TPS
Engine temperature sensor
Electronic control system
Engine
ECM
OCV (PORT)
OCV (STBD)
2-6
2