3. Slow combustion gives low fuel
comsumption, low maximum
combustion pressure, absence
of smoke, lack of detonation,
shockless operation, quick
"pick-up" and smootb idling.
4. In general, this method of combus-
tion renders the engine less
sensitive to variations in fuel
oil characteristics, allowing it
to operate smoothly and satis-
factorily with any good grade
of diesel oil.
The fuel injection equipment is
of the Bosch type with an individ-
ual fuel pump for each cylinder
and a spray valve which enters the
side of each spherical combustion
chamber. Direct combustion oc-
curs in this chamber which is off-
set from the center line of the cyl-
inder and is entirely surrounded
by water jacketing. This results in
lower operating temperatures of
valves, pistons, piston rings and
cylinder liners, complete combus-
tion and advantageous lubrication
The offset position of the com-
bustion chamber and the elimina-
tion of a central vertical spray
nozzle, permits the use of a large
single exhaust and a single inlet
valve for each cylinder. The use
of two valves, instead of four, sim-
plifies the valve gear and allows a
shorter and more compact cylin-
der block, as well as more space
for cooling water to circulate
where it is most needed.
Engine frame design incor-
porates new features which are ex-
clusive with De La Vergne. The
engine frame is a single rigid cast-
ing designed to obviate the neces-
sity for through bolts or tie rods.
This method of construction
makes possible a very rigid and
compact cylinder block casting.
Crankshaft bearing supports are
attached to the engine frame. This
arrangement, together with pre-
Underframe and Sub-Base Assembly.
A Truck Complete with Motors,
Air Brake Cylinders and Brake Rigging.
Locomotive with Entire Hood Removed,
Showing Accessibility of All
Parts of Engine and Electrical Equipment.