Mazda RX-8 2004 - Sequential Dynamic Air Intake System (S-Dais) Control Block Diagram; Sequential Dynamic Air Intake System (S-Dais) Control Operation; Operation Outline; Operation List

CONTROL SYSTEM
01–40–15
01–40
SEQUENTIAL DYNAMIC AIR INTAKE SYSTEM (S-DAIS) CONTROL BLOCK DIAGRAM
CHU014000140S16
• The PCM determines the engine conditions based on each input signal and sends signals to the SSV solenoid
valve, the APV motor (13B-MSP (High Power)), the VDI solenoid valve, and the VFAD solenoid valve (13B-
MSP (High Power)).
End Of Sie
SEQUENTIAL DYNAMIC AIR INTAKE SYSTEM (S-DAIS) CONTROL OPERATION
CHU014000140S17
Operation Outline
• Operates the SSV solenoid valve, the APV motor (13B-MSP (High Power)), the VFAD solenoid valve (13B-
MSP (High Power)), and the VDI solenoid valve according to the engine speed range.
Operation list
Engine speed range and operation conditions for each valve
On: Energization, Off: Non-energization, Open: Valve opens, Closed: Valve closes
*1
: 13B-MSP (Standard Power): Approx. 5,800 rpm or more
*2
: 13B-MSP (High Power): Approx. 7,300 rpm or more
Operation
SSV solenoid valve
• Turns on at the same time as the injection timing
of the secondary injector. Due to this, the intake
manifold vacuum is fed to the SSV actuator
allowing intake air from secondary port which is
opened by the SSV valve.
PCM
ECT SENSOR
MAF SENSOR
ECCENTRIC SHAFT POSITION
SENSOR
TP SENSOR
SSV SOLENOID VALVE
APV MOTOR
(13B-MSP (HIGH POWER))
VDI SOLENOID VALVE
VFAD SOLENOID VALVE
(13B-MSP (HIGH POWER))
BARO SENSOR
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Item
Engine speed range
Low speed Medium speed Medium-high speed High speed
SSV
Solenoid valve OFF ON (Secondary injector is operating)
Valve Closed Open
VFAD
Solenoid valve OFF ON (Approx. 5,500 rpm or more)
Valve Closed Open
APV
Motor OFF ON (Approx. 6,250 rpm or more)
Valve Closed Open
VDI
Solenoid valve OFF
ON
*1*2
Valve Closed Open
OFF
OFF
ON
ON
SSV
SECONDARY
INJECTOR
SSV
SOLENOID
OPEN
CLOSE
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