Improved High-pressure Gas or Petroleum Engine.
Year: 1898

page_text: .
PROVISIONAL SPECIFICATION.
Improved High-pressure Gas or Petroleum Engine.
I, HENRY CROUAN, of 21, Boulevard National, Clichy, Department of Seine,
France, Engineer, do hereby declare the nature of this invention to be as
follows:
The object contemplated by the present invention is an arrangement allowing
of increasing, without changing weight and measuring, the power of a four-
termed gas or petroleum engine provided with two cylinders, the pistons being
connected to the crank-shaft to compress at the same time or to expand at the same
time the gas enclosed in a drum arranged therefore, and the explosions in each
of the cylinders being effected alternatively and not simultaneously, consequently
one of the cylinders is at the suction period while the other cylinder is at the
explosion period.
For this purpose, the said drum is provided with a valve arranged to be opened
when the pistons are sucking in the drum, the said valve then admitting air and
gas or carburated air in the desired proportion.
The pistons being at the end of their stroke, each having thus sucked a cylinder-
ful, consequently two cylinderful together, the said valve will be closed. The
two pistons, then return one to the other, compressing the gas enclosed in the
drum.
But within one of the two cylinders the explosion is effected and consequently
there will be a high pressure preventing the suction valve of the said cylinder to
be opened, while, on the contrary, in the other cylinder there is tendency to
produce a vacuum and the suction valve of this cylinder will be opened. .
The gas enclosed in the said drum is consequently sucked through the latter
valve and shoved back to the same by bringing the two pistons together.
At the stroke's end, therefore a great part of the double charge sucked by the
said drum passes into the second mentioned cylinder, and at the moment the com
pression commences in the second mentioned cylinder, (now the two pistons provide
a new double charge for the piston of the first cylinder) there will be a pressure
higher than atmospheric pressure: the result of this will be a higher compression,
a stronger explosion and a greater effective power.
Dated this 2nd day of April 1898.
L.
DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium.

page_text: Improved High-pressure Gas or Petroleum Engine.
I, HENRY, CROUAN, of 21, Boulevard National, Clichy, Department of Seine,
France, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement; —
My invention has reference to gas and petroleum engines and the object thereof
consists of increasing the power of such engines without increasing their weigh
so as to have a maximum of power with a minimum, of weigh.
My improvements may be advantageously applied to two cylinder motors
whether the cylinders of these motors are opposite to one another on each side of
the central drum, or arranged in any other manner provided that the pistons be
pivoted to the crank so that the two pistons of the engine compress or release the
gases enclosed in the drum at the same time. Furthermore the explosions in
each cylinder must be effected alternately and not simultaneously that is, when
one of the cylinders must be at the explosion period.
I attain the afore stated object of my invention by the arrangement and com-
bination of parts more clearly pointed out and claimed hereinafter and illustrated
by way of example, in the accompanying drawings, in which Fig. 1, is a plan
view of the improved engine, embodying my invention.
Fig. 2 is a side elevation of same, with parts broken away to show the
mechanism.
In the drawing, like letters refer to like parts throughout the figures.
Referring by letters to the drawing, A represents a drum within which operate
the crank-arms of the main shaft, S indicates the valve through which the explo-
sive mixture enters said drum C₁ and C are the cylinders of the engine and A¹
and A² the gas inlet valves therefor.
My improved engine is essentially composed of a drum A on each side of which
is preferably secured a cylinder C¹ and and the top of which carries a suitable
valve-box to lodge the valve S through which the explosive mixture (a mixture of
air and gas or carburetted air) enters said drum, said mixture being led thereto
through a pipe a, leading from any supply not shown in the drawing. If desired
I may provide two valves S in lieu of one only and in this case the air and gas
are separately introduced into the drum A through said valves S. respectively.
Two pipes 61 and 62 lead from the drum A and connect the same with the cylin-
ders and C2 respectively through the intermediary of two inlet-valves.A¹ and A2
respectively provided on eylinders C and C2; said cylinders are. furthermore
connected with drum A at their inner ends which are open for the purpose herein-
after described..
The pistons, the connecting-rods, the crank arms. and the other. usual parts. may
be constructed in any suitable well known manner and I therefore do not further
describe said parts.
The igniting device and other appliances which do not form a part of my
invention are omitted for clearness of the drawings..
14-
My improved engine operates as follows: The parts are arranged and combined
in order that the two pistons of the engine are moved to and removed from the
drum A at the same time, and when said pistons have reached the end of their
respective stroke toward the outer end of each cylinder C1 C2, they will have
sucked into the drum A a volume of explosive mixture equal to the volume. of said
two cylinders C C and the valve S will then be closed again, the two pistons
moving back to the drum A and compressing the explosive mixture contained

page_text: therein; said return movement is caused by the explosion of the explosive mixture
sucked into and compressed by the piston is cylinder and this explosion pro-
duces a high pressure in said cylinder, thus preventing the corresponding inlet-
valve from opening, while in cylinder where no explosion occurs (the
explosions being alternately produced as afore stated) there is a tendency to
produce a vacuum whereby the corresponding inlet-valve A will be opened, thus
allowing the explosive mixture contained in drum A, to flow through pipe 6* into
said cylinder C. Consequently the gas enclosed in drum A is sucked through
pipe 6 valve A into cylinder and at the same time forced into said cylinder by
the pistons which are brought together and when the pistons have reached the
end of their respective stroke toward the drum A, the largest part of the volume
gas originally contained in said drum will be sucked and forced into cylinder U
in the return movement of the pistons caused by the explosion now occurring in
cylinder C².
The volume of the gas alternately sucked and forced into each cylinder, being
larger than the volume of one cylinder, it is evident that, when said gas is about
to be compressed, the pressure in the respective cylinder will be higher than
atmospheric pressure whereby a higher compression of the explosive mixture and
therefore a stronger explosion of said mixture are obtained and consequently the
engine will produce a much higher power than other engines.
in the accompanying drawing I have shown the pipes 6 and be provided with
valves S and S respectively, said valves being arranged on drum A and intended
to prevent the gas from returning into said drum, should the valves A' and A2 not
operate momentarily for any reason whatever.
Other modifications may be made in the construction of the various parts of
my improved engine without departing from the scope of my invention and I wish
it to be understood that I do not contine myself to the precise arrangement and
construction of the parts as shown in the accompanying drawing so long as the
peculiar features of my invention be retained.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is;-
-
1. In a gas engine the combination of a central drum, two cylinders secured
thereto, movable pistons reciprocating in said cylinders, connecting rods and crank
arms connected to said pistons, with a suitable valve arranged on said drum for
supplying the same with explosive mixture, suitable inlet-valves on the cylinders
and pipe connecting said drum with the cylinders for conveying the explosive
mixture from said drum into the cylinders substantially as described and for the
purpose set forth.
2. In a gas engine the arrangement of the parts substantially as described for
causing the reciprocating pistons to suck the explosive mixture together into
central drum and to force said explosive mixture afterwards into one of the
cylinders only, the explosive contained in the other cylinder being then ignited,
for the purpose set forth.
3. In a gas engine, a central drum in combination with two cylinders com-
municating therewith by their open ends on one hand, and by suitable pipes and
valves on the other hand and means for producing a tight compression and strong
explosion of the explosive mixture in said cylinders, substantially as described
and for the purpose set forth.
J. P. BAYLY,
18, Fulham Place, London, W., Agent for the Applicant.