Improvements in Explosion Engines.
Year: 1895

page_text: .Date of Application, 18th Oct, '1895-Accepted. "23rd' Nov.,' 1895
'Improvements in Explosion Engines.
I, OSKAR BRUNLER of Kultzschau, Eilenburg, near Leipzig, Germany,
Engineer, do hereby declare the nature of this invention and an what manner
the same is to be performed, to be, particularly described and ascertained in
and by the following statement.—
The explosion angine forming the object of this present invention differs from
all.other explosions engines by. the fact that the escape-valve remains open even
during the suction period, whilst the escape-condint is closed against the outer air.
By this aangement it is attained, that the remains left in tlie 'combustion
chamber are entirely, or for the; greater patt, pushed out of the cylinder by the
inflowing mixture.
The accompanying drawing illustrates such an engine partially in vertical section,
partially in side view.
Its mode of operation as the following
By the down stroke of the piston B in the cylinder A, the combustion charge is
diawn in.
The valve e is the inlet-valve By the return stroke of the piston B
the charge in the combustion chamber is compressed. At the inner dead-point
position the ignition takes place through the igniting appliance and the piston b
is driven down in the well-known manner. As soon as B has reached the extreme
dead-point position, the escape-valve e is opened by means of the link-motion.
This link-motion consists of the cog-wheel, the cog-wheel 9 which is twice the
diameter of the wheelf of the excentire fixed on the same shaft as g, and the rod 1.
The products of combustion escape through the pipe k, the box 1, valve m and
channel n into the outer all. As thic exceutich keeps the valve e open during
half a revolution of the wheel g, this, therefore, corresponds to a whole revolution
of the operating shaft, equal to two piston stiokes; consequently valve e remains
open till the close of the suction period.
With the inward stroke of the piston B, the remains are driven out, excepting
the amount that is left in the combustion chamber.
As soon as B has reached the inner dead-point position, m closes. In box 1,
pipe , and in the cylinder A now prevails a pressure which is equal to the
outer air.
But this pressure, equal to the outer air, siuks unmediately, and, indeed, with
such rapidity, that already a considerable tension of suction in h, and in A has
taken place before B has gone but a few millimetres on its outward motion. Thus
sinking of the pressure results from the speedy cooling of the gus. It cannot be
asserted that a cooling of the gas also takes place in A. On the contrary it
receives reflected heat from the walls, and especially heat from the piston. The
suction power, in consequence of the concentration of the gas which occurs, extends
chiefly to space l, and next to pipe k As valve m is now closed, and a return flow
of gas through channel a can no longer result, therefore, during the time of letting
in, a streaming of gas, not only takes place in the direction from valve c to the
outwards moving piston, but also in the direction to pipe k and box 1.
The inlet and outlet channels can be so arranged, that no mixtuo goes into
pipe, but, that the new inflowing mixture pushes the remains, left in the
Combustion chamber, before it in the direction of the outlet valve.
The force of this curent can be controlled, within a wide range, at will. In
cooling of pipe, the cooling and the consequent diminishing of pressure can be
i

page_text: canied out to a great extent. The speed at which the machine works also
plays a part
The relief-valve m may also be arranged on another part of the escape-conduit,
instead of on the box 1, only care must be taken to provide a space between valve e
the capacity of which is sufficiently large to answer the piedescribed
and valve
pui pose.
m,
Ilaving 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. An explosion engine, the outlet-valve of which remains open during the time
of letting in, and whose escape-conduit is provided with a relief-valve, so that
during the suction period, in consequence of the occurring concentration of cooling
gas in the escape-conduit, and therewith, a simultaneous sinking of the pressure, a
current in the duection of the outlet-valve is created for the ejection of the
remains of the products of combustion, as described
2. In an explosion-engine the combination of the cylinder A, the escape valve e,
the pipe and the valve m as and for the purpose set forth
3. In an explosion engine the combination of the pipe k, the box and the
valve mas and for the purpose specified.
Dated this 10th day of October 1895.
OSKAR BRUNLER.