Sequential Dynamic Air-Intake System (S-Dais) Operation; Operation Outline; Operation - Mazda RX-8 2004 Service Highlights

Mazda rx-8 2004

Hide thumbs Also See for RX-8 2004:

Table of Contents

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

• To increase intake air amount and combustion

efficiency, the S-DAIS controls the size of the

intake ports and the air length in the intake pipes

by opening or closing the SSV, VDI valve, APV

(13B-MSP (High Power)), and VFAD valve (13B-

MSP (High Power)) according to engine speed

and load condition.

Low-speed range

• At the low-speed range, the secondary and

auxiliary ports close, and a high velocity intake air

amount is fed from only the primary port. Due to

this, better combustion efficiency is obtained by

the improved fuel atomization, producing high

torque output.

INTAKE-AIR SYSTEM

SSV ACTUATOR

AUXILIARY PORT

(HIGH POWER))

(ILLUSTRATION SHOWS 13B-MSP (HIGH POWER))

PRIMARY PORT

: INTAKE AIR

: EXHAUST AIR

(ILLUSTRATION SHOWS 13B-MSP (HIGH POWER))

VFAD VALVE (13B-MSP (HIGH POWER))

THROTTLE VALV

VDI ACTUATOR

(HIGH POWER))

(HIGH POWER))

EXHAUST MANIFOLD

CHU011300113S07

Table of Contents