New-York tribune., 1911-12-24
NEW TYPES OF ENGINES
First View Will Be at Auto
Show in Garden.
MOISELESS VALVE DEVICES
Students of Motor EtiicIency
Have a. Rare Treat IN
Store for Them.
Jy CHARLES =. ny R'B \
Technical Correspondent.


The last year or so has awakened a srea,
interest among motor enthusiasts IN engine
valves and valve action. and tho t@eitth
National Automobile Show n Madison
Square Garden. January to e. will bring
out several cars with sleeve valves. The
Stearns. Columbia and Stoddard- Dayton
cara viii stage the Knight double sleeve de-
vice. which has set the fashion for many
other similar STYLES. This valve is also
made by the Atlas Engine Company and
may he found on other cars as well.
The Hudson Company has been expert
menting with and will show revolving
disk valve which differs materially from the
sleeve ides. hut no less effectively gets ria
of the poppet valves 30 long the accepted
forms. Doubtless others will have some
similar design. as many are being expert
mented with and used 10 a greater or less
extent. particularly on the other side of the
water
In the same line Of thought, although II
may seem as an opposed idea. is the two
cycle engine. with its piston acting as It's
valves This gets an action as smooth and
noiseless as the sleeve valves and with
out tho parts employed. This form Of on
gine has not been developed so generally
as the four-cycle. but has been on the
market in Elmore ears and others for
number Of years. In tho AmpleX cars the
two-cycle engine Is very large and pow
erful. and. with a special carburetor, Is
capable Of action comparable 10 the very
best OF the four-cycle engines. In smaller
cars. like the Atlas. the engine contains
some special features and is giving splen-
did results.
Nor are the varieties mentioned all that
is TO be seen in the engine line. The quiet
ness Of the sleeve valve, rotary and valve
less engine has rnade the makers Of the
usual type Of motor look 10 their laurels
with the result that many of them have in
closed their valve actions behind cover
plates. which both keep out the dirt and
keep in the noise and oil. This construc-
tion Is particularly adapted 10 motors en-
ploylng block cylinders and with both sets
OF valves on the same side. While very
few examples. as the Everitt, were TO be
seen year ago, the increase in numbers is
noticeable, and follows the lead Of the for
eign makers, who have almost universally
adopted some such arrangement
While the two-cycle engine Is usually
thought of as valveless. II is TO be remem-
bered that the Atlas uses a rotating disk
carried by the crank shaft 10 admit the new
charge 10 the crank case much az the Hud-
son uses the disk In the cylinder head. and
the Elmore uses a rotating cylindrical valve
TO admit the new charge TO the case and
,hen to transfer il to the proper cylinder.
Some designers OF the two-cycle prefer the
valveiess form. while others recognize that
the inlet valves. being always cool, are not
objectionable, and prefer the certainty Of
action which these insure at wide range
Of speeds.
Even in the poppet valves Of the five
cycle engine there will be found advance
ment The sizes have been increased in
some motors while in others the valve ma
terial has been changed. Heads OF special
alloy steel. able 10 resist heat and electrt-
cally welded 10 carbon steel stems. are now
quite common. Nor Is waive diversity all
that is TO be seen. Users are learning
that a little oil on the valyc. even
though it be poppet valve, helps
to seat more quietly and tightly. and
so the practice of feeding a little oil with
the fuel is growing. particularly on air
cooled and racing engines, where the heat
s great and the maximum service is de-
sired In all. the motor student will find
much Of interest in valves at the coming
show.