Process for Obtaining a Compression in Gas- and Petroleum-engines with Slow Combustion.
Year: 1893

page_text: Date of Application, 15th Nov., 1893-Accepted, 30th Dec., 1893
CUTLEIE TUITIVATION.
Process for Obtaining a Compression in Gas- and Petroleum-engines
with Slow Combustion.
1, OSCAR BRÜNLER of 15 Braustrasse, Eutritzsch-Leipsic, Germany, 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:-
The present invention relates to a process used in gas- and petroleum-engines
with slow combustion (combustion-engines) for the purpose of obtaining a
compression in the working-cylinder at the end of the backward-motion of the
piston. The same as in the case of steam-engines, this compression serves to avoid
the shocks, and to discharge the inlet-organs which are under the high pressure of
the compressed air and of the compressed gas. On account of the great clearance,
it is impossible in the combustion-engine to leave a sufficient quantity of products
of combustion as bolster in the cylinder.
Fig. 1 of the annexed drawing schematically represents a combustion-engine.
Fig. 2 is a diagram of the process forming the object of this invention.
The piston b slides in the cylinder a. The supply-piped for the pressure-air as
well as the supply-pipe f for the combustibles (gas, petroleum &c.) end in the
heated ignition-chamber which stands in connection with the cylinder a.
piston returns, the products of combustion leave through the valve g.
When the
In order to accomplish the said purpose, the valve of the combustibles-supply-
pipefis closed after the piston b has made part of its forward-motion, while
valve of the pressure-air-supply-pipe d is left open still for a short time. Thus
the whole of the ignition-chamber c is filled with pure pressure-air. When piston 6
has nearly completed its backward-motion, the outlet-valve g is closed, while valve h
is opened, so that combustibles enter the ignition-chamber c; there the combustibles
find air, and the mixture ignites in consequence of the heating of the chamber c.
Through this the pressure is considerably increased so that the intended compression
is accomplished.
If it were intended to obtain such compression only by carly opening the valves h
and i, the large valve i would be charged heavily by the pressure of the compressed
air.
In the diagram, shown by Fig. 2 the line 1. 2 represents the filling through both
valves hi. From 2 to 3 the filling is exclusively effected by valve i. After the
expansion 3, 4 follows the push-out of the products of combustion 4. 5. At 5 the
outlet-valve g is closed. Between 5 and 7 valve his re-opened, so that the pressure
created by the combustion causes the curve to ascend to 1.
If it were intended to obtain the compression only by too early closing the
outlet-valve 9, the curve of compression would elapse between 5 and 6.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
In gas- and petroleum-engines with slow combustion obtaining a compression at
the end of the backward motion of the piston by keeping the chamber of ignition
to the greater part filled with air for the return of the piston, and by letting the
combustibles enter the ignition-chamber after the closing of the outlet-valve of the
products of combustion and before the backward-motion of the piston is completed.
OSCAR BRÜNLER.