Improvements in and in connection with Admission Valves of Internal Combustion Engines.
Year: 1898

page_text: Improvements in and in connection with Admission Valves of
Internal Combustion Engines.
I, ARTHUR FREDERICK EVANS, of 11, Brunswick Walk, Cambridge, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in valves used for the admission and regu-
lation of gases used in internal combustion engines.
In this invention I provide preferably an air space between the inner cylinder and
the outer cylinder casing, to assist in the drying and purifying of the air to be
admitted into the cylinder, this admission being made through a circular port
controlled by a mitre spindle valve. Behind this said circular port I provide a
chamber or space of a convenient size and shape to contain the valve spindles, springs
and other parts of the improved device to be hereinafter described. In this chamber
is a second and smaller pocket chamber immediately behind the inlet valve of the oil,
gas or other vaporising material to be admitted for mixture with the air, the said
oil or gas being admitted before it passes the air valve.
This small chamber communicates with the oil or gas supply by a pipe leading to
and connected with the supply, and also with the air chamber aforesaid by a hole
or channel leading into the same preferably at a point behind the larger air port
aforesaid or thereabouts.
This inlet is likewise controlled by a mitre valve, the spindle of which passes
through the small chamber into the large chamber, the valve in both this and the air
inlet opening inwardly towards the cylinder.
The spindle or rod of the larger or inain admission valve passes through the larger
chamber aforesaid, to the outside of the chamber where it is controlled as hereinafter
described.
The outer end of this spindle has a screw thread upon it, on which is threaded a
sleeve which passes down and inside the larger chamber aforesaid where it terminates
and has attached to its inner end, an arm or projection, so arranged that when the
spindle is depressed in the opening of the larger valve, this projection comes in contact
with and depresses the spindle of the smaller valve, and opens the same, and thus
admits a required quantity of oil, gas or other vaporising material, and the opening
of the valve is regulated by the position of the aforesaid arm or projection on the
sleeve, by means of the screw thread on the larger valve spindle, this being effected
by screwing or unscrewing the sleeve.
The valves are opened by the vacuum produced in the crank or cylinder chamber
and are kept down in their places, when not thus opened, by coil or helical springs
round the spindles, inside the larger chamber aforesaid. The travel of the spindle of

page_text: the larger valve and consequently the amount of combustion material admitted is
controlled by means of a lever worked by hand or by the engine governor which
by means of nuts adjustable on the sleeve checks the amount of lift in the
valve.
Dated this 3rd day of Sentember 1808
REGINALD W. BARKER,
Applicant's Agent, 56, Ludgate Hill, London, E.C.
Improvements in and in connection with Admission Valves of
Internal Combustion Engines.
I, ARTHUR FREDERICK EVANS, of 11, Brunswick Walk, Cambridge, Engineer, 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 improvements in valves used for the admission and regula-
tion of gases used in internal combustion engines.
In this invention I provide an air space between the inner cylinder and the outer
cylinder casing, to assist in the drying and purifying of the air to be admitted into
the crank chamber or firing chamber, this admission being made through a circular
port controlled by a mitre spindle valve. Behind this said circular port I provide a
chamber or space of a convenient size and shape to contain the valve spindles, springs
and other parts of the improved device to be hereinafter described. In this chamber
is a second and smaller pocket chamber immediately behind the inner valve of the
oil, gas or other vaporising material to be admitted for mixture with the air, the said
oil or gas being admitted before it passes the air valve.
In the case of a petroleum or spirit engine I provide preferably a regulating valve
constructed by forming a chamber connected with the small chamber aforesaid and
the connection between the two chambers terminating in a mitre hole.
In the top
of this chamber a stuffing box is fitted through which a spindle is screwed terminating
in a cone end which fits into the aforesaid mitre hole. A pointer and dial plate are
provided connected with the spindle to facilitate regulation.
The small chamber hereinbefore mentioned communicates with the oil or gas
supply by a pipe leading to and connected with the supply and also with the air
chamber aforesaid by a hole or channel leading into the same preferably at a point
behind the larger air port aforesaid or thereabouts.
This inlet is likewise controlled by a mitre valve, the spindle of which passes
through the small chamber into the large chamber, the valve in both this and the
air inlet opening inwardly towards the crank chamber or firing chamber.
The spindle or rod of the larger or main admission valve passes through the larger
chamber aforesaid, to the outside of the chamber where it is controlled as hereinafter
described.
The outer end of this spindle has a screw thread upon it on which is threaded a
sleeve which passes down and inside the larger chamber aforesaid where it terminates
and has attached to its inner end, an arm or projection, so arranged that when the spindle
is depressed in the opening of the larger valve this projection comes in contact with
and depresses the spindle of the smaller valve and opens the same and thus admits a
required quantity of oil, gas or other vaporising material and the opening of the
valve is regulated by the position of the aforesaid arm or projection on the sleeve by

page_text: means of the screw thread on the larger valve spindle, this being effected by screwing
or unscrewing the sleeve.
The valves are opened by the vacuum produced in the crank or cylinder chamber
and are kept down in their places when not thus opened by coil or helical springs
round the spindles or in any other convenient way inside the aforesaid chambers.
The travel of the spindle of the larger valve and consequently the amount of
combustion material admitted is controlled by means of a lever worked by hand or by
the engine governor which by means of nuts adjustable on the sleeve checks the
amount of lift in the valve.
In order that this invention may be readily understood reference is made to the
accompanying drawings in which
Fig. 1 is an elevation partly in section of the regulating valves,
Fig. 2 is an end elevation of the same,
Fig. 3 is a sectional plan shewing the air and oil or gas admission valves.
Fig. 4 is a detail view of the arm or projection for controlling the action of the
aforesaid small valve for the admission of the oil or gas or other vaporising material.
Fig. 5 is a section of the engine cylinder shewing the air drying space between the
inner and outer cylinder casings ;
Fig. 6 is a sectional plan of the portion of the said cylinder joining the air pipe.
In the several views A is the engine shaft revolving in bearing B. C is the air
pipe, D a regulating lever for operating air admission valve from the engine gearing.
This regulating lever is operated by the engine working the short arm D₁, which
oscillates on the pins 12, and so brings the shoulder D³ to hear against the flange ()
of the valve spindle. The valve may also be regulated by hand, (as for instance in
starting the engine) by the lever D in the same inanner. E is the air valve spindle
with the cone faced valve F, the said spindle working in the guide G. H is the
valve chamber cover, I the sleeve, with projection J sliding in said cover and kept in
place by guides J1 J2 and through which the valve spindle E is screwed, the adjust-
ment of the said sleeve and air valve spindle being regulated by the flanged nut O
and lock nut P. K is the small valve for the admission of oil, gas or other vaporising
material, sliding and working in the screwed valve seat L. M is the valve box or
chamber formning a chamber for aforesaid valves and also a cover to the engine
chamber. N is the duct or tube for the admission of the oil or other vaporising
material the admission of which from the supply vessel is controlled by the valve
spindle screwed through the stuffing box R and working through the gland S.
The oil or other material is admitted at T and flows into the oil reservoir U through
the channel or duct U¹ and thence into the channel or duct N, the quantity being
regulated by the cone end of the valve spindle Q, the position and amount being
determined by experiment and marked on a dial plate on the flange W of the valve
body and the pointer V. In Fig. 5 is shewn the air space for drying and purifying
the air before admission into the air valve chamber. X being the cylinder, Y the
cylinder jacket space, Z the inner cylinder casing and 1 the outer cylinder casing
forming the air space 2. The air to be dried enters the space through the holes 3 3,
and passes upwards and down the channel 4 formed by two ribs 5 5, so that the air
space 2 surrounds the cylinder casing except that portion formed by ribs 5 5, which
serve the purpose of a channel conducting the dried air to the air pipe C and thence
to the chamber of the air regulating valve F.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. In valves for the admission of gases used in internal combustion engines the
provision of an air space between the inner and the outer cylinder casing for drying
the air to be admitted to the valves in combination with an air valve and an oil
valve actuated by the said air valve, a regulator for regulating the motion of the
said air valve, a regulator for regulating the amount of oil passing through the oil

page_text: valve substantially as and for the purpose herein set forth and described and
illustrated by the accompanying drawings.
2. The application of this invention to any form or kind of internal combustion
engine, substantially as and for the purpose herein set forth and described and
illustrated by the accompanying drawings.
Dated this 3rd day of June 1899.
REGINALD W. BARKER,
Applicant's Agent, 56, Ludgate Hill, London, E.C.