An Improved Hydrocarbon Engine.
Year: 1898

page_text: Date of Application, 17th May, 1898
Complete Specification Left, 26th Jan., 1899-Accepted, 6th May, 1899
PROVISIONAL SPECIFICATION.
An Improved Hydrocarbon Engine.
We, HEINRICH HILDEBRAND, of 2, Pesenbachstrasse, WILHELM HILDEBRAND,
of 1A, Frauenhoferstrasse, and ALPHONS BRUCKMANN, of 5, Schönfeldstrasse, all of
Munich, in the Empire of Germany, Merchant, Engineer, and Austro-Hungarian
Consul, respectively, do hereby declare the nature of this invention to be as
follows:-
This invention relates to hydrocarbon engines and has for its object to effect a
complete expulsion of the gases of combustion from the cylinder so that unequal
mixtures of the gaseous mixture with any remaining gases of combustion and
consequently irregular ignitions are avoided. Consequently only pure charges and
thereby regular ignitions are produced which produce an even running of the
machine. Moreover by the arrangement hereafter described, any ignition of the
fresh mixture of gases flowing to the cylinder by means of the burning discharge
gas, and thereby any constant burning in the cylinder, is absolutely prevented.
For this object slots are provided in the cylinder behind the discharge passage.
When the piston at the end of its backward movement uncovers these openings
any gases of combustion still contained in the cylinder under a suitable pressure
are entirely expelled through these openings and make room for the inflowing
mixture of gas without any other special mechanisms or a special movement of the
piston being necessary for this purpose.
By this means the advantages mentioned at the commencement of the present
specification are attained and a further advantage is also attained in that the
piston passes into the open air where it is considerably cooled.
SM 1900
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicants.
An Improved myarocarion Mugine.
We, HEINRICH HILDEBRAND, of 2, Pesenbachstrasse, WILHELM HILDEBRAND,
of 1A, Frauenhoferstrasse, and ALPHONS BRUCKMANN, of 5, Schönfeldstrasse, all of
Munich, in the Empire of Germany, Merchant, Engineer, and Austro-Hungarian
Consul, respectively, 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:-
This invention relates to hydrocarbon engines and has for its object to effect

page_text: a complete expulsion of the gases of combustion from the cylinder so that uu-
equal mixtures of the gaseous mixture with any remaining gases of combustion
and consequently irregular ignitions are avoided. Consequently only pure charges
and thereby regular ignitions are produced which produce an even running of
the machine. Moreover the fresh mixture of gases flowing to the cylinder
cannot be ignited by means of the burning discharge gas, and thereby any constant
burning in the cylinder is absolutely prevented.
The invention is shown in the accompanying drawings in which Figure 1 is
a longitudinal section and Figure 2 a cross section of Figure 1 through the open-
ings b, and Figure 3 a similar section through the valve r.
For the object of this invention slots are provided in the cylinder in front
of the discharge passage a. When the piston & at the end of its forward move-
ment (see Figure 1. dotted lines) uncovers these openings b, any gases of com-
bustion still contained in the cylinder are entirely expelled through these
openings and make room for the mixture of gas flowing in through the valve r
without any other special mechanisms or a special movement of the piston being
for this purpose. The return of the piston by the impetus of the fly
wheel simultaneously closes the passages b.
necessary
The usual crosshead in the present invention is replaced by a second piston.
which merely serves for guiding the rod m and is rigidly connected with the
actual piston k, which latter in its rear dead point assumes the position shown in the
drawing. In its forward dead point however the working face of the piston k is
in the position shown in dotted lines. For sake of clearness the piston kis
shown shaded. It will thus be seen that the rear ends of the openings bare
exposed and together with the exhaust passage allow the consumed gases to
escape into the open.
By this means the advantages mentioned at the commencement of the present
specification are attained and a further advantage is also attained in that the
piston passes into the open air where it is considerably cooled.
In order to more clearly illustrate the working of the invention, we shall now
describe the cycle of operations of the engine shown as an example. It should
however be noted that, with the exception of the openings which form the
essential feature of the present invention, this method of working forms the subject
of a separate Patent Application, No. 112768 filed simultaneously with the present
application.
At the moment of the explosion, the piston is driven forward and passes first
the discharge passage a which is thus uncovered so that a portion of the gases of
explosion can pass into the outer air. On the piston moving further forward, it
passes and uncovers the openings which form the essential feature of this
invention so that the remainder of the explosive gases contained in the cylinder can
escape into the open air through these openings as well as through the discharge
passage which still remains open.
As soon as the pressure in the cylinder becomes less than the pressure in the gas
mixture supply passage (Figure 3) to which is connected a pipe supplying
gaseous mixture at a suitable pressure, the valve is opened in consequence of the
greater pressure of the gaseous mixture over the pressure in the cylinder, and the
mixture flows through the passage into the cylinder. This movement of equalization
of pressure takes place as soon as the piston by its forward movement has uncovered
the discharge passage. In the meantime the piston has commenced its return
stroke owing to the impetus of the fly wheel and thus first closes the openings b
and on its further movement also closes the discharge opening a. At the same
moment compression commences of the gaseous mixture admitted to the cylinder
through the passage and at the same moment the gaseous mixture admission
valve closes again for the following reason. The compression pressure is greater
than the pressure in the gaseous mixture supply pipe y and consequently the excess
pressure comes into action in the cylinder and closes the valve which remains
closed during the whole compression period, the explosion period and also during

page_text: the expansion period until the discharge openings a and b are again uncovered by
the forward movement of the piston. During the time from the opening of the gas
inlet valve to the closing of the same, that is to say during the period of
admission of the gaseous mixture, the said mixture can also escape through tho
then opened discharge passages a and into the open air. The quantity of this
mixture which so escapes is so inconsiderable in consequence of the rapid number
of revolutions of the motor that it need not be taken into consideration.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
A hydrocarbon engine characterised by the formation of slots (b) in front of the
discharge passage (a) in the front part of the cylinder, which allows the piston at
the end of its stroke to pass into the open air, whilst the remainder of the gases of
combustion contained in the cylinder escape with absolute certainty through the
slots without the intermediary of any special mechanisms or a separate stroke of
the piston, with the object of obtaining absolutely pure charges and an even
running of the machine and for preventing a constant combustion in the cylinder
substantially as hereinbefore set forth.
T
1011
1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicants.