Subaru SVX 1992 Manual page 249

2-7 [M1ool
FUEL INJECTION SYSTEM
M MECHANISM AND FUNCTION
1 . General
The Multi Point Fuel Injection (MPFI) 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 technology.
With this system fuel, which is pressurized at a constant
pressure, is injected into the intake air passage 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, depending 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
permits simple, yet highly precise metering of the fuel .
Further, all the operating conditions of the engine are
converted into electric signals, and this results in addi-
tional features of the system, such as large improved
adaptability, easier addition of compensating element,
etc . The MPFI system also has the following features :
1) Reduced emission of harmful exhaust gases .
2) Reduced in fuel consumption .
3) Increased engine output .
4) Superior acceleration and deceleration .
5) Superior startability and warm-up performance in
cold weather since compensation is made for coolant
and intake air temperature .
2