Means for Cooling the Inlet Valve of Gas and Oil Motor Engines.
Year: 1896

page_text: Date of Application, 11th Jan., 1896
Complete Specification Left, 24th Sept., 1896-Accepted, 24th Oct., 1896
INOY IDIONAL DI MOLTIVATION
Communicated from abroad by THE GASMOTOREN FABRIK DEUTZ, of Koeln-
Deutz, in the Empire of Germany, Manufacturers.]
Means for Cooling the Inlet Valve of Gas and Oil Motor Engines.
1, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery Lane,
in the County of London, Consulting Engineer and Chartered Patent Agent, do
hereby declare the nature of this invention to be as follows:-
With the larger gas or oil motor engines the inlet valve for the combustible
charge easily becomes heated to such a degree that the air drawn in for the
combustible charge becomes considerably heated by contact with its surfaces and
with those of the valve stem and its guides. This is liable to the objection that by
such air becoming expanded before its entrance into the cylinder, a less weight of
air is mixed with the gas or vapour to form the combustible charge in the cylinder
than should be the case, whereby the useful effect of the engine is reduced.
It is not new to cool the inlet valve chamber externally, but this cooling is not
sufficiently effective, as, by this means, the heating of the valve itself and its stem
and guides is not prevented.
The present invention consists in cooling the inlet valve chamber from the
inside by constructing the guide for the valve spindle of an enlarged hollow
cylindrical form so as to project into the mixing chamber and form the inner walls
thereof, and causing cold water to circulate through the interior of such hollow
guide.
•
:
According to one construction for this purpose the said guide of hollow
cylindrical form is made to project from the end face of the valve chamber
centrally through the air inlet compartment into the mixing compartment so as to
reduce this to a narrow annular space, the inner wall of which is formed by the
said hollow guide while the outer wall is formed with fine perforations which
establish a communication between the said space and the surrounding annular gas
chamber which is supplied with the combustible gas or vapour required for the
charge.
Passages lead from circulating pipes at the outer end of the said hollow guide
into the hollow space thereof for establishing a continuous circulation of cold
water through the same.
The valve spindle passes through a central passage in the guide to the outside
where it is acted upon by a spring for holding the valve closed, in the ordinary
manner.
Thus the considerable external surface, cooled by the circulation of water,
offered by the hollow cylindrical guide, which extends up to within a short
distance of the valve, effectually cools the air, as also the mixture of gas and air
passing in contact therewith towards the valve, and also, by radiation, cools the
valve itself; at the same time the valve is also cooled by conduction by reason
of the valve spindle being cooled by contact with the cooled central guide
passage.
Dated this 11th day of January 1896.
ABEL & IMRAY,
Agents for the Applicant..

page_text: CODILEIE DI BUITIATION
Means for Cooling the Inlet Valve of Gas and Oil Motor Engines.
1, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery Lane,
in the County of London, Consulting Engineer and Chartered 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:-
With the larger gas or oil motor engines the inlet valve for the combustible
charge easily becomes heated to such a degree that the air drawn in for the
combustible charge becomes considerably heated by contact with its surfaces and
with those of the valve stem and its guides. This is liable to the objection that by
such air becoming expanded before its entrance into the cylinder, a less weight of
air is mixed with the gas or vapour to form the combustible charge in the cylinder
than should be the case, whereby the useful effect of the engine is reduced.
It is not new to cool the inlet valve chamber externally, but this cooling is not
sufficiently effective, as by this means the heating of the valve itself and its stem
and guides is not prevented.
The present invention consists in cooling the inlet valve chamber from the
inside by constructing the guide for the valve spindle of an enlarged hollow
cylindrical form so as to project into the mixing chamber and form the inner walls
thereof, and causing cold water to circulate through the interior of such hollow
guide.
According to one construction for this purpose the said guide of hollow
cylindrical form is made to project from the end face of the valve chamber
centrally through the air inlet compartment into the mixing compartment so as to
reduce this to a narrow annular space, the inner wall of which is formed by the
said hollow guide while the outer wall is formed with fine perforations which
establish a communication between the said space and the surrounding annular gas
chamber which is supplied with the combustible gas. or vapour required for the
charge.
Passages lead from circulating pipes at the outer end of the said hollow guide
into the hollow space thereof for establishing a continuous circulation of cold
water through the same.
The valve spindle passes through a central passage in the guide to the outside
where it is acted upon by a spring for holding the valve closed, in the ordinary
manner.
The accompanying drawing shews by way of example a vertical section of the
part of the cylinder of a gas motor engine with the said invention applied thereto.
Atmospheric air enters the valve chamber h through the passage a while the
combustible gas enters through passage b and annular chamber c, whence it issues
through lateral openings c¹ into the chamber h to mix with the air supply on its
way through the inlet valve d into the engine cylinder in the well known
manner.
For the purposes of the present invention, the guide e for the valve spindle is
enlarged and is formed hollow, thus reducing the inner end of the valve chamber
to a narrow annular space, in which the gas jets issuing through the openings c
become effectually mixed with the air supply.
The annular hollow space formed in the guide e, has a supply of cold water
circulated through it, entering through the pipe and flowing off through pipe g.
By this means the spindle-guide receives a considerable extent of outer cooling
surface for effectually cooling the air and gas supply flowing in contact therewith,
and at the same time the inner wall of the guide also has a cooling effect on the

page_text: spindle of the valve, and consequently, by conduction, also on the valve d itself, so
that the gaseous mixture in passing between the valve and its seat, will not be
beated to any considerable degree thereby.
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 :-
Means for cooling the inlet valve of gas and oil motor engines consisting in
providing the valve stem with a hollow guide forming the inner wall of the
annular gas and air mixing chamber, and causing a supply of cooling water to
flow through such hollow guide so as to offer a considerable cooling surface
for the gaseous mixture flowing through the valve chamber, substantially as
described.
Dated this 23rd day of September 1896.
ABEL & IMRAY,
Agents for the Applicant.