Air Line; Air Flow Sensor - Subaru SVX 1992 Manual

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Table of Contents

FUEL INJECTION SYSTEM

Air which is drawn in and filtered by the air cleaner is

metered and sent to throttle body via the air intake boot .

From the throttle body, the air is regulated by the

open-close operation of the throttle valve and is deliv-

ered to the collector chamber and the intake manifold . It

is then distributed to the respective cylinders to mix

with fuel injected by the fuel injectors. Thus, the air-fuel

mixture is delivered into the cylinder . Part of the air

branched at the upstream of the throttle body is sent to

the by-pass air control solenoid valve which regulates

engine idle speed .

Air flow sensor

Throttle body

Collector chamber

Intake manifold

By-pass air con-

trol solenoid

Fuel injector

Auxiliary air

control valve

2. AIR FLOW SENSOR

The MPFI system employs a hot-film type air flow

This air flow sensor converts the amount of intake air

into an electric signal by utilizing the heat transfer

phenomenon between the incoming air and heating

resistor located in the air intake .

The features of this air flow sensor type are as follows:

1) High-altitude compensation is automatically made .

2) Quick response .

3) There are no moving parts.

4) It is compact.

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