CONTROL SYSTEM [13B-MSP]
01-40–13
01-40
2009 Mazda RX-8 Serv
i
ce H
i
ghl
i
ghts (3452–1U–08C)
Rev
i
sed 11/2008 (Ref
.
No
.
R321/08)
End Of S
i
e
SEQUENTIAL DYNAMIC AIR INTAKE SYSTEM (S-DAIS) CONTROL OPERATION [13B-MSP]
id0140g1304200
Operat
i
on Outl
i
ne
x
Operates the SSV soleno
i
d valve, the APV motor, the VFAD soleno
i
d valve (w
i
th VFAD), and the VDI soleno
i
d
valve accord
i
ng to the eng
i
ne speed range
.
Operat
i
on l
i
st
Eng
i
ne speed range and operat
i
on cond
i
t
i
ons for each valve
On
:
Energ
i
zat
i
on, Off
:
Non-energ
i
zat
i
on, Open
:
Valve opens, Closed
:
Valve closes
Operat
i
on
SSV soleno
i
d valve
x
Turns on at the same t
i
me as the
i
n
j
ect
i
on t
i
m
i
ng of the secondary
i
n
j
ector
.
Due to th
i
s, the
i
ntake man
i
fold
vacuum
i
s fed to the SSV actuator allow
i
ng
i
ntake a
i
r from secondary port wh
i
ch
i
s opened by the SSV valve
.
VFAD soleno
i
d valve (w
i
th VFAD)
x
At an eng
i
ne speed of less than 5,250 rpm, the VFAD soleno
i
d valve turns off and feeds
i
ntake man
i
fold
vacuum to the actuator (valve closes)
.
x
At an eng
i
ne speed of 5,250 rpm or more, the VFAD soleno
i
d valve turns on and feeds BARO to the actuator
(valve opens)
.
APV motor
x
When the follow
i
ng cond
i
t
i
ons are met, a duty s
i
gnal
i
s sent to the APV motor, the APV gradually opens
.
If an
APV-open cond
i
t
i
on
i
s not met, a m
i
nus duty s
i
gnal
i
s sent to the APV motor, revers
i
ng the motor and clos
i
ng
the APV
.
APV-open cond
i
t
i
on
—
Eng
i
ne speed
:
6,250 rpm or more
—
ECT
:
Approx
.
70
q
C {158
q
F} or more
VDI soleno
i
d valve (13B-MSP (h
i
gh power))
x
At an eng
i
ne speed of 7,650 rpm or more, the VDI soleno
i
d valve turns off and feeds
i
ntake man
i
fold vacuum to
the actuator (valve opens)
.
End Of S
i
e
FUEL INJECTION CONTROL OUTLINE [13B-MSP]
id0140g1101700
x
The fuel
i
n
j
ect
i
on control
i
ncludes the follow
i
ng
:
—
synchron
i
zed
i
n
j
ect
i
on control, wh
i
ch performs fuel
i
n
j
ect
i
on at the rotor
i
ntake stroke accord
i
ng to
des
i
gnated t
i
m
i
ng
.
—
non-synchron
i
zed
i
n
j
ect
i
on control, wh
i
ch performs fuel
i
n
j
ect
i
on only when fuel
i
n
j
ect
i
on cond
i
t
i
ons are met
regardless of rotor
i
ntake stroke
.
—
Fuel cut control, wh
i
ch temporar
i
ly stops fuel
i
n
j
ect
i
on
.
x
There are pr
i
mary, secondary fuel
i
n
j
ectors, and the
i
n
j
ect
i
on t
i
m
i
ng and
i
n
j
ect
i
on amount var
i
es accord
i
ng to
the eng
i
ne speed range
.
Due to th
i
s, the opt
i
mum amount of fuel
i
n
j
ect
i
on
i
s controlled at all ranges
.
End Of S
i
e
Item
Eng
i
ne speed range
Low speed
Med
i
um speed
Med
i
um-h
i
gh speed
H
i
gh speed
SSV
Soleno
i
d valve
OFF
ON (Secondary
i
n
j
ector
i
s operat
i
ng)
Valve
Closed
Open
VFAD
Soleno
i
d valve
OFF
ON (Approx
.
5,250 rpm or more)
Valve
Closed
Open
APV
Motor
OFF
ON (Approx
.
6,250 rpm or more)
Valve
Closed
Open
VDI
Soleno
i
d valve
OFF
ON
Valve
Closed
Open
Содержание 2009 RX-8
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