OTHER CONTROL SYSTEMS
- SCV Syste
m
SCV (SWIRL CONTROL VALVE) SYSTE
M
The intake port has been divided longitudinally
into two passages as shown in the following
illustration
.
The swirl control valve, which is opened and
closed by the intake manifold vacuum, is
mounted in passage
;A
.
Exhaust valve
Swirl control ~ Intake valv
e
valve (closed)
®
When the engine is running under a light load or
below a certain rpm, this valve closes, creating a
powerful swirl
. This increases combustion
efficiency, thereby improving fuel economy
.
Under a heavy load or over a certain rpm, the
valve opens, increasing intake efficiency, and
thus improving engine output
.
A swirl control valve is provided in the intake
port of each cylinder
.
Swirl control lin
k
Intake
po
rt
Passage B
Passage B
OHP 82
OHP 8
2
Thro
tt
le
position
sensor
Manifol
d
pressur
e
sensor valve
Swirl control valve
OHP 82
117
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