Isuzu 3LA, Руководство пользователя

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I. Introduction – Application Notes
U
L-Series Diesel 2
The L series engines are used in a variety of
industrial applications ranging from small
generators (pictured here) and light duty farm
machinery to construction equipment. Their
compact design makes them an ideal power
system when conservation of space is of the
utmost consideration. Internally, both the 3L
and 4L engines share many similar parts. The
main difference between these engines is their
displacement and horsepower output.
Additionally, the 4L series has the option of
being turbocharged.
There are several L-series engines that are CARB (California Air Resource Board) certified.
CARB emissions standards for the L series apply to engine models in the 11-25 hp range and
25-50 hp range. To meet the new CARB standards, the pump’s injection timing has been
changed. This eliminates the cost of expensive emission control scrubbing devices. The
leaner fuel mixture (shorter injection duration) helps increase the exhaust temperatures while
lowering emissions at a fraction of the cost of scrubbing devices. Another feature unique to
Isuzu engines, is the conical shaped heat shield. This gives the incoming fuel injections a
“swirl affect” that increases atomizing for maximum combustion efficiency; this too helps
reduce exhaust emissions.
These are just some of the engineering refinements that Isuzu has implemented to stay
abreast with the latest in diesel and diesel emission technologies. In the ensuing pages, a
more thorough look at the internal components as well as fuel system will be covered.