HomeMy WebLinkAboutThe Citizen, 1997-04-23, Page 13THE CITIZEN, WEDNESDAY, APRIL 23,1997 PAGE 13.
EFI, TBI, MPI — the technology of squirting
EFI. TBI. MPI. It all sounds so
impressive, but all it means is how
you go about squirting gasoline
into your engine so you can go for
a drive. Almost all engines are fuel
injected now (EFI - electronic fuel
injection), while some have more
injectors to get the fuel distribution
among the cylinders as even as
possible (MPI - multi-point
injection).
Each fuel injector opens and
closes to squirt fuel into die engine
thousands of times per second. It's
all controlled by the engine's
computer, which is the reason the
engine management system is so
important to how well your car
runs. Today's computers are so
smart that they can monitor the
ignition timing, exhaust
temperature and oxygen content,
and engine load, and make
adjustments as needed to keep the
car running at its most fuel
efficient. High fuel efficiency also
translates into low exhaust
emissions.
Typically, fuel injectors for a
multi-point system are located
along a rail to position them for
optimum fuel distribution. Because
there are several, each one only
injects a little fuel - so the outlet
hole is tiny. This hole can get
clogged, causing rough idle and
inefficient driving. Usually, this
happens if you make a lot of short
trips or leave your car idling.
Sometimes, you can clean the
injectors out by taking the car out
on the highway and driving at
highway speeds for 30 km or so.
All the major gasoline marketers
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