Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 2000-2003 Approved Subaru Legacy 2000 2000 Service Manual MECHANISM AND FUNCTION SECTION Fuel Injection System MSA5TCD00L18164

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2-7     [M100]                 MECHANISM AND FUNCTION
1. General

1. General
D The Multipoint Fuel Injection (MFI) system is a system that supplies the optimum air-fuel mixture
to the engine for all the various operating conditions through the use of the latest electronic
With this system fuel, which is pressurized at a constant pressure, is injected into the intake air port
of the cylinder head. The injection quantity of fuel is controlled by an intermittent injection system
where the electro-magnetic injection valve (fuel injector) opens only for a short period of time, de-
pending on the quantity of air required for one cycle of operation. In actual operation, the injection
quantity is determined by the duration of an electric pulse applied to the fuel injector and this per-
mits simple, yet highly precise metering of the fuel.
D Further, all the operating conditions of the engine are converted into electric signals, and this
results in additional features of the system, such as large improved adaptability, easier addition
of compensating element, etc.
The MFI system also has the following features:
D Reduced emission of harmful exhaust gases
D Reduced in fuel consumption
D Increased engine output
D Superior acceleration and deceleration
D Superior startability and warm-up performance in cold weather since compensation is made
for coolant and intake air temperature.


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