Improved Cooling Arrangement for Internal Combustion Engines, specially applicable to Motor Road Vehicles.
Year: 1897

page_text: Date of Application, 13th Oct., 1897-Accepted, 24th Dec., 1897
Improved Cooling Arrangement for Internal Combustion Engines,
specially applicable to Motor Road Vehicles.
"
A communication from abroad by LA SOCIÉTÉ DILIGEON AND CIE, of 48 Rue de
Malte, Paris.
I WILLIAM DOWNILAM ROWLINGSON of 7 Quality Court, Chancery Lane,, in the
county of Middlesex, 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:-
The cooling arrangement which forms the subject of this invention is appli-
cable to explosion motors but is specially intended for the cylinder of hydro-
carburet motors for automotor vehicles.
This arrangement is based in principle on the employment of a pump or fan set
in motion by the motor itself and suitably arranged for driving the fresh air along
and throughout the circumference of the exterior walls of the motor, these walls
being furnished with radiating wings for increasing the cooling surface. The
arrangements of the valves and pipes for taking in and discharging as well as.
those for ignition, are such that they do not constitute a screen but offer on the
contrary a minimum resistance to the current of cooling air. The part which
produces the current of cooling air may be of any suitable construction and be
controlled either directly or indirectly from the main shaft through the medium
of any suitable gear. The important point in connection with the part which
produces the current of air is 'that it should be placed at the back end of the
cylinder or cylinders that is to say on the side of the breech in order that the
freshest air may be first in contact with the parts having the greatest need of
being cooled. In the case of a single cylinder the shaft or axis of the same and
that of the fan coincide; when there are two or more cylinders, the fan is arranged
in such a manner and made of such dimensions that the current of air produced
passes over the walls all around the cylinders and the cooling jet or stream remains
quite parallel and in contact with these walls from one end to the other. In
certain cases each cylinder could be furnished with a special fan or other con-
trivance having the same function.
In order that the invention may be properly understood I append to the present
description a drawing in which I have illustrated by way of example the applica-
tion of the invention to an explosion motor with two cylinders.
Figure 1, is a plan of those parts of the motor which are under consideration
here.
Figure 2, is a longitudinal section of the back part of the motor, and
Figure 3, is an end view, the fan being removed for the sake of clearness.
I am going first to describe in detail the special form of the invention illus-
trated in the drawing in order to make clear the arrangement and the working.
It will be easy to distinguish between that which must be considered as essential
to the invention and that which is only peculiar to the example of demonstration
chosen and consequently variable according to the circumstances of the application.

page_text: The motor illustrated has two cylinders (X) (X) the pistons of which actuate
the main shaft (a) through the medium of the connecting rods (Y) (Y). On this
shaft (a) is mounted a pulley (b) which through the medium of the belt (c), the
sides or edges of which run over the guide and tension rollers (d), actuates
the pulley (f) mounted loosely on the fixed shaft (g) which is firmly fixed in the
bottom of the receptacle (Z) of the explosion chambers. The pulley (f) is formed
as being of one piece or part with a rotary fan (2) also loosely mounted on the fixed
shaft (9) and which by rotating produces the current of air. The operation and
construction of this fan are such that it produces a current of air forming all
around the exterior wall of the cylinder, a rather dense layer, the direction of which
indicated by the parallel arrows (s) (s) is from the back to the front of the
cylinders so that the escape valves (k) (k) the igniters (m) (m) and the suction
valves (n) (n) receive the freshest jet or stream of air, and the air which is warmer
will be in contact with the end of the cylinders not requiring such forcible
refrigeration.
As indicated in the drawing the receptacle or envelope (Z) of the explosion
chambers and the cylinders (X) (X) are furnished with radiating wings (p) (p)
arranged according to generating lines or approximate thereto. The drawing also
indicates that the escape valves, the igniters and the admission valves as well as
the inlet pipes and discharge pipes (r) are arranged one before the other in groups
and placed in the same direction as the wings so as to present a minimum resis-
tance to the current of cold air. The external shape of these parts may be con-
sidered so as to still further diminish the resistance to the air current.
In the case of the application of this arrangement to the motor of an automotor
carriage the fan is supplied with fresh atmospheric air by means of a blowing
machine or other suitable contrivance so that the air reaches the fan under pressure
which has been found to be advantageous as regards results.
The working of the arrangement which has just been described is very easy to
understand.
The motor being in action causes the blades of the fan () to rotate in a suitable
direction and at a suitable rate of speed by the medium of the gearing (a) (b)
(c) (f). (The movable angular piece (d) bolted on to the flat part (3) enables the
tension of the belt (c) to be regulated). In rotating, the fan (7) draws in the
atmospheric air from behind either directly or with the assistance of a conduit
terminating at a convenient point, forces this air forward and produces a refrige-
rating current (s) (s) which first cools the parts (k) (k) (m) (m), (n) (n), (r) and
passes over the wings (p) as well as the walls of the receptacle (Z) and then cools
the cylinders (X) (X). The refrigeration is thus effected methodically.
From the foregoing it will be easily seen that it is always possible to realize the
invention in one form or another according to the case to which it is applied by,
varying the practical details.
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:
Firstly. A refrigerating arrangement for explosion motors consisting of a part
for producing a current of fresh atmospheric air which is actuated by the motor
itself through the medium of any suitable gear and arranged in such a manner
that the current of air generated first cools the valves, the igniters and the
explosion chambers.
Secondly. A refrigerating arrangement according to the preceding claim in
which the valves, the igniters and the inlet and outlet pipes are arranged by
groups one behind the other in the direction of the current of refrigerating air
in such a way as not to offer more than a minimum resistance, the casings of the
explosion chambers and of the cylinders being furnished with radiating wings
arranged longitudinally.
Thirdly. A refrigerating arrangement according to the preceding claim for

page_text: automotor vehicle motors in which the air is taken up by the part producing the
current of refrigerating air the motion of the vehicle being utilized for producing
this supply of air under pressure.
Fourthly. A refrigerating arrangement for explosion motors of the kind indi-
cated in which there is a part which produces a current of air for each cylinder.
Dated the 13th day of October 1897.
WILLIAM DOWNHAM ROWLINGSON.