Improvements in the Admission and Governing Devices of Gas Engines.
Year: 1899

page_text: Date of Application, 3rd Aug., 1899
Complete Specification Left, 2nd May, 1900-Accepted, 3rd Aug.,
1900
PROVISIONAL SPECIFICATION.
Improvements in the Admission and Governing Devices of Gas
Engines.
I, EDWIN RUUD, of 32, Victoria Street, in the City of Westminster, London,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to internal combustion engines and has for its object to
provide an improved device for regulating the supply of motive fluid to the
cylinder in accordance with the demand and the work taken from the engine
shaft.
In many engines at present on the market the supply of motive fluid is
regulated by what is known as a hit or miss governor which operates to entirely
cut off the supply of motive fluid if the governor balls rise to a certain extent,
consequently, with engines of this description if the load is light a large number
of cycles will occur without any impulse being given to the piston; this is very
detrimental to the working of the engine and renders the speed very variable.
According to my invention I provide for regulating the admission of gas or
air to the cylinder by the governor which I combine with a valve inserted in
the supply pipe, the proportion of air and gas is regulated before the mixture
passes the valve by suitable regulating taps. By this means I prevent the
occurrence of cycles in which no impulse is given to the piston and secure that
once in every cycle a charge either greater or less, according to circumstances
of gas and air shall be admitted to the cylinder. Any suitable description of
valve may be employed, one which I have found useful in practice consists of a
double balanced valve the air being admitted at one side and the gas at the
other, the mixture escaping by a third pipe the entrance to which is regulated
by the position of the valve." The valve stem is of course attached to the governor
shaft.
My improved arrangements for governing internal combustion engines are
specially applicable to gases in which the motive fluid consists of a rather poor
gas mixed with an approximately equal amount of air, but it is also applicable
to richer and poorer mixtures.
I may employ a mixing chamber for the air and gas either before they have
passed the valve or afterwards.-in the latter case the valve is made in two
I also may introduce a
portions one for the air and the other for the gas.
pressure-reducing valve in the gas supply pipe to reduce the pressure of the gas
to approximately atmospheric amount so that the proportion of air and gas may
always remain about the same when the controlling valves have once been set.
whatever may be the amount of the mixture admitted through the main valve.
Dated this 3rd day of August 1899.
W. P. THOMPSON & Co..
322. High Holborn. London. W.C..
Patent Agents for the Applicant.

page_text: In the arrangement shown in Figures 1 and 2 the gas and air mixes in the valve
chamber before passing through the valve, whereas in the construction shown in
Figures 3 and 4 the mixing of the air and gas can obviously not occur until
both fluids have passed into the pipe 3. In this case I may provide a mixing
chamber between the valve and the cylinder.
When necessary, I provide a pressure-reducing valve in the gas supply pipe
to reduce the pressure of the gas approximately to that of the atmosphere so
that the proportion of air and gas in the mixture admitted to the cylinder may
always remain about the same, as hereinbefore mentioned, when the regulating
cocks have once been set.
My improved arrangements for governing improved internal combustion
engines are specially applicable to cases in which the motive fluid consists of a
rather poor gas mixed with an approximately equal amount of air, but my
invention is also applicable to richer and poorer mixtures.
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. A device for governing gas engines in which the admission valve is con-
nected with and its operation controlled by the governor, the proportion of gas
and air in the motive fluid being regulated by means of separate regulating cocks
provided in the gas and air supply pipes substantially as, and for the purpose
specified.
2. The device for regulating the admission of air and gas to
a gas
engine cylinder substantially as described with reference to Figures 1 and 2, or
to Figures 3 and 4 of the accompanying drawings and operating as described.
3. In a device for governing gas engines in the manner described by regulating
the quantity of mixed air and gas admitted into the cylinder, a pressure reducing
valve in the gas supply pipe by which the pressures of the gas and air are
equalized before mixing so that the proportion of gas and air in the mixture
remain substantially constant notwithstanding variations of load, substantially
as described.
at this Carand day of Now 1000
W. P. THOMPSON & Co.,
Of London, Liverpool, Manchester and Birmingham.