Method of Varying the Strength of the Explosive Charge or the Ratio between the Constituents of the Gas and Air Mixture in Gas Engines.
Year: 1893

page_text: Date of Application, 3rd Jan., 1893-Accepted, 4th Feb., 1893
COMPLETE SPECIFICATION.
[Communicated from abroad by the firm of GERSON AND SACHSE, Engineers, of
233, Friedrichstrasse, Berlin, Germany.]
Method of Varying the Strength of the Explosive Charge or the
Ratio between the Constituents of the Gas and Air Mixture in
Gas Engines.
I, JASPER WETTER, Patent Agent, of 433 Strand, in the County of London,
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 a better utilization of the gas by producing a
constant increase in the strength of the gas and air mixture or explosive charge
supplied to a gas engine for each explosion, so that the strongest mixture (that is
the mixture containing the greatest proportion of combustible gas) will be close
to the igniting device situated near the admission port of the cylinder, from
which point the proportion of combustible gas (or vapour) gradually decreases
towards the piston.
For this purpose I act on the devices which close the gas canal and the air canal
in such a manner, that in proportion as the gas canal is opened, the air canal is
narrowed.
to illustrate this invention,
In the accompanying drawing which serves
a represents the gas inlet canal and 6 the air inlet canal of a gas engine; c represents
the admission port for the gas and air mixture, b' the valve controlling the air inlet,
and a' the valve controlling the gas inlet.
In the present instance the two valves a¹ bare formed on the same body A,
which arrangement is not, however, essential and has only been shown for the sake
of simplicity.
The igniting device (not shown in the drawing) is situated near the inlet canal c
and may be of any convenient type.
Supposing now, that the valve a completely closes the passage a, when the
working cylinder or combustion chamber of the engine begins to fill, while the
valve leaves the passage b completely open; further, that the valve body or
carrier A is operated by a suitable valve gear in such a manner, that it travels
from a to b, while the working cylinder or combustion chamber is being charged,
the mixture which flows through the canal c to the combustion chamber will
gradually become richer in gas as the charging proceeds. At the end of the
charging period the strongest mixture, that is the mixture containing the highest
percentage of hydrocarbons or other combustible gas, will be close to the igniting
device arranged near the canal c.
It is evident, that various types of slide valves or of lift valves, such as
oscillating valves, piston valves, double beat valves, or ordinary slide valves, and
valve gear may be adapted to work in the manner described.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
A method of gradually increasing the proportion of combustible gas in the gas
and air mixture flowing into the combustion chamber or power cylinder of gas
engines during the charging period, which consists in combining with the gradual

page_text: opening of the gas canal or gas inlet a gradual narrowing of the air canal or air
inlet, so that at the end of the charging period the richest mixture shall be situated
near the inlet, where the ignition takes place, substantially as described.
Dated this 3rd day of January 1893.
FAIRFAX & WETTER,
Agents for the Applicant.