Improvements in Gas and Oil Motor Engines.
Year: 1891

page_text: Date of Application, 2nd Feb., 1891
Complete Specification Left, 31st Oct., 1891-Accepted, 5th Dec., 1891
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE GAS MOTOREN FABRIK DEUTZ, of
Cocln-Deutz, in the German Empire, Manufacturers.]
Improvements in Gas and Oil Motor Engines.
I, CHARLES DENTON ABEL of No. 28 Southampton Buildings in the County
of London Consulting Engineer and Patent Agent do hereby declare the
nature of this invention to be as follows:—
This invention relates to valve apparatus for controlling the admission of com-
bustible gas or vapour and air to the working cylinder of gas and oil motor engines,
and it consists in an arrangement of such apparatus whereby the simultaneous
opening and closing of valves controlling respectively the gas and the air supply
is effected, in order to insure the formation of a uniform explosive mixture during
the whole of the suction stroke.
For this purpose, an annular gas passage in the casing of the gas and air mixing
valve communicates by a passage, provided with a shut-off cock, valve or slide,
with a space on the underside of the gas admission valve, the chamber above which
communicates with the gas supply pipe. The stem of the gas valve passes down
through a partition into a lower chamber and there carries a second valve that
closes the air supply inlet, such chamber being also made to communicate by a
passage with the chamber below the mixing valve. The gas and air valves are so
proportioned that on the production of a partial vacuum beneath the former and
above the latter, the upward pressure of the outer air tending to open the air valve
will overbalance the downward pressure of the gas supply on the gas valve, so that
the two valves will be simultaneously opened to an extent dependent on the
differential pressure produced. The annular gas passage of the mixing valve is
provided with a series of small horizontal holes communicating with the chamber
below such valve. The action of the above described arrangement will be as
follows. On the engine piston commencing its suction stroke, the gas and air
mixing valve will be first opened by the suction produced, and an exhaust being
then produced above the air admission valve and below the gas valve, these
will be made to open as described so as to cause gas and air of the desired pro-
portions to enter the chamber of the mixing valve, and to pass thence into the
cylinder, the gas being made to issue in a number of small jets transversely through
the air current, thus becoming effectually mixed therewith so as to produce a
uniform explosive mixture.
On the engine running too fast, the cock, valve or slide in the gas passage is
closed by the action of the governor by means of any well known arrangement,
whereupon, although both the gas and the air valves will be opened on the suction
stroke as before described, only air will enter the cylinder until on the reduction of
the speed the gas passage is again opened.
Instead of arranging thic shut-off cock valve or slide in the passage leading from
the gas valve to the mixing chamber as described, it may be arranged on the gas
supply pipe or channel beyond the gas valve.
Dated this 2nd day of February 1891.
DRI
EL &
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Gas and Oil Motor Engines.
I, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery Lane,
in the County of London, Consulting Engineer and Patent Agent, 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 has for its object to effect the simultaneous opening and closing
of the gas and air supply valves of gas and oil motor engines, in order to obtain
a uniform explosive mixture during the entire charging stroke, and it consists in
employing for this purpose a construction of two automatically acting valves fixed
upon one and the same spindle, as I will proceed to describe with reference to the
accompanying drawings, in which Fig. 1 shews a vertical section through the valve
apparatus as applied by way of example to a four stroke cycle gas motor engine;
Fig. 2 shews a sectional plan on line X X and Fig. 3 a sectional plan on
line YY.
A is the working cylinder of a four stroke cycle gas or oil motor engine, c is the
admission valve for admitting the explosive charges into the cylinder; e is the gas
supply valve in the valve casing b, to which the gas passes from the supply pipe
through the cock . The valve e carries on its spindle a second valve or disc by
means of which the opening of the air supply pipe is opened or closed, the
chamber above which valve communicates by a passage y with the mixing chamber
below the valve c. is an annular passage surrounding the said valve chamber,
and communicating therewith by a number of small radial passages i, while it also
communicates with the chamber below the gas valve e by a passage in which is a
shut-off cock, valve, or slide d which is actuated in any known manner by a
governor so as to close the gas supply during one or more charging strokes when
the engine is running too fast. The mode of action is as follows:-
At the commencement of the charging stroke the partial vacuum formed in
cylinder A first causes valve e to open, and a corresponding vacuum being then
formed below the gas valve e and above the air valve, the differential pressure
thus produced by the gas supply acting on the upper side of valve e and by the
atmospheric pressure on the underside of valve will cause both valves to open
simultaneously so that air will pass through g into the chamber of valve c and
thence into the cylinder, while at the same time gas will pass through the open
cock into the annular passage and thence through the small apertures i into the
space below valve c.
By this simultaneous inflow of air through valve and gas through valve e,
cock d and apertures i, only a perfectly mixed charge of gas and air can pass into
the cylinder, and owing to the perfect control of the supply by the simultaneous
action of the valves e and a very uniform explosive mixture will be insured
throughout the stroke. The compressing, working, and expelling strokes take
place exactly in the same manner as in motor engines of known construction.
On the engine running above normal speed, a governor of any suitable known
construction acts upon the shut-off device d of the gas supply so as to keep it
closed during one or more suction strokes. During this time, although both valves e
and will open during the suction stroke, only air will pass in through channel
and valve e so that no explosions will occur until by the decrease of the engine's
speed, the governor is again made to open the cock or other device d so as to again
admit the gas supply to the cylinder.
The shut-off device d is best placed between the gas valve e and the
admission valve c, but it can also be placed beyond the gas valve, on the gas
supply pipe.
It will be readily understood that although I have described the said invention

page_text: with reference to four-stroke-cycle gas or oil motor engines, it is equally applicable
to such engines working with a two stroke cycle.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. In gas and petroleum motor engines, the use of a gas inlet valve e and an air
inlet valve fixed to one and the same stem, and acting in combination with a shut
off valve or cock d in such manner that when the valve or cock d is opened during
the charging stroke of the cylinder, the valves e andare caused to open simul-
taneously so that gas enters from the annular channel through small openings i
in order to mix intimately with the air entering through the passage g, such
mixture then passing into the cylinder through valve e, while when the cock or
valve g is closed by the governor only air enters the cylinder, substantially as
described.
2. In gas and petroleum motor engines, a gas valve and an air valve combined
on one and the same stem, so that the gas supply and the air supply to the engine
are simultaneously opened, and that both said valves make the same stroke, sub-
stantially as described.
Dated this 31st day of October 1801
ABEL & IMRAY,
Agents for the Applicant.