#
SEQUENTIAL DYNAMIC AIR INTAKE SYSTEM (S-DAIS) CONTROL OPERATION

BHE014000140T17

## 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

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

*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.

1 | Secondary injector
2 | SSV solenoid
3 | SSV
4 | OFF
5 | ON
6 | OFF
7 | ON
8 | Open
9 | Close

VFAD solenoid valve (13B-MSP (High Power))

• At an engine speed of less than 5,500 rpm, the VFAD solenoid valve turns off and feeds intake manifold vacuum to the actuator (valve closes).

• At an engine speed of approx. 5,500 rpm or more, the VFAD solenoid valve turns on and feeds BARO to the actuator (valve opens).

1 | Engine speed
2 | VFAD solenoid valve
3 | VFAD valve
4 | 5,500 rpm
5 | OFF
6 | ON
7 | Open
8 | Close

APV motor (13B-MSP (High Power))

• When the following conditions are met, a duty signal is sent to the APV motor, the APV gradually opens. If an APV-open condition is not met, a minus duty signal is sent to the APV motor, reversing the motor and closing the APV.

APV-open condition

  – Engine speed: Approx. 6,250 rpm or more
  – ECT: Approx. 20°C {68°F} or more

• The APV motor has a built-in APV position sensor that monitors the APV position.

• The duty ratio and the operation time when the APV valve is open are as shown in the figure.

1 | APV motor duty ratio
2 | APV position sensor
3 | APV
4 | 100%
5 | 12%
6 | Above 1.5 V
7 | Open
8 | Close
9 | 0.3 s

• When the opening conditions are not met, the APV sends a reverse duty signal while the APV opens.

• The duty ratio and the operation time when the APV closes are as shown in the figure.

1 | APV motor duty ratio
2 | APV position sensor
3 | APV
4 | 100%
5 | 12%
6 | 0%
7 | Above 1.5 V
8 | Open
9 | Close
10 | 0.4 s
11 | 30 s

VDI solenoid valve

• At a VDI valve operation engine speed or more, the VDI solenoid valve turns on and feeds intake manifold vacuum to the actuator (valve opens).

1 | VDI valve operation engine speed
2 | VDI solenoid valve
3 | VDI valve
4 | OFF
5 | ON
6 | Open
7 | Close

VDI valve operation engine speed

  • 13B-MSP (Standard Power): Approx. 5,800 rpm or more
  • 13B-MSP (High Power): Approx. 7,300 rpm or more