US1331649A

US1331649A - Ventilating system

Info

Publication number: US1331649A
Application number: US146826A
Authority: US
Inventors: Charles F Kettering
Original assignee: DOMESTIC ENGINEERING Co
Current assignee: DOMESTIC ENGINEERING Co
Priority date: 1917-02-05
Filing date: 1917-02-05
Publication date: 1920-02-24
Anticipated expiration: 1937-02-24

Description

C. F; KETTERING.

VENTILATING SYSTEM.

APPLICATION FILED FEB- 5,1917.

1,331,649. Patented Feb. 24,1920.

UNITED STATES PATENT OFFICE.

CHARLES F. KETTERING, OF DAYTON, OHIO, ASSIGNOR TO THE DOMESTIC ENGINEERING COMPANY, A CORPORATION OF OHIO.

VENTILATING- SYSTEM.

Specification of Letters Patent.

Application filed February 5, 1917. Serial No. 146,826.

To all whom it may concern:

Be it known that I, CHARLES F. Kn'r'rnn ING, a citizen of the United States of America, residing at Dayton, county of Montgomery, and State of Ohio, have invented certain new and useful Improvements in Ventilating Systems, of which the following is a full, clear, and exact description.

This invention relates to an improvement in internal combustion engines, and more particularly to engines of the air-cooled type.

One of the objects of the present invention is to provide an engine including means for effecting the cooling thereof by drawing or forcing air currents into contact with the part of the engine which becomes heated from operation, and to then discharge these air currents after coming into contact with the engine and effecting the cooling thereof under pressure in such a manner that the exhaust gases of the engine, that is' the gases expelled from the engine on the exhaust stroke of the engine piston, will be conveyed to a remote point from the engine.

In the use of gas engines, and particularly those of the stationary type which are used as power plants for various purposes, it is well known that it is dangerous and extremely ob ectionable to discharge the exhaust gases from the combustion chamber of the engine to the atmosphere adjacent to the engine, inasmuch as engines of this type are generally operated indoors, and in many instances, in the-presence of workmen or attendants.

It has been found objectionable. however, to provide an exhaust pipe of any great length to convey these gases to sucha remote point as .will be unobjectionable, in View of the fact that the exhausting of these gases through an elongated pipe are necessarily effected by the pressure of the engine piston on its exhaust stroke, and if the exhaust pipe is unduly long, back pressure will be created which will tend to prevent the proper exhaust. of the products of com bustion (and exhaust gases) and tend to reduce the efli'ciencv of the engine.

Other objects and advantages will be apparent from the following description, reference being had to the accompanying drawto draw air into contact with the engine for cooling purposes.

Referring to the drawings, the engine 20, which is of substantially the same construction as that described, illustrated and claimed in the co-pending application of Charles F. Kettering, Serial No. 58,207, filed October 27, 1915, is of the air-cooled type. That is, the flywheel of the engine, desig nated by the numeral 24, is so constructed that it not only functions as a balancing device, but it also operates as a suction fan, tending to draw air into contact with the heated parts of the engine for cooling purposes.

By referring to Fig. 1 it will be noted that the flywheel 24 is mounted at one end of the engine, within the casing 29. This flywheel is provided with a series of radial ribs or fan blades 23, and a series of peripheral blades 25,

The interior of the casing 29 is substantially in communication with the interior of the casing 27 which surrounds the engine cylinder, shown in dotted lines in Fig. 1, providing an air chamber as at 28, through which air currents drawn in through the top of the casing 27 as per the arrows shown in Fig. 1, through a suction action of the fan 24.

The conduit 29 tends to receive the air ejected by the forced action of the flywheel 24, and will tend to convey the air any determined distance, to such a remote point as may be convenient or unobjectionab-le to users of the engine.

It will also be noted that the flywheel 24 is so mounted that practically the interior portion of the flywheel, which includes the Patented Feb. 24, 1920.

ribs or blades 23, is in alinement with the opening or chamber which tends to surround the crankcase and cylinder of the engine, due to the construction of the crankcase and the

casing

26 and 27 respectively.

The numeral 33 designates an exhaust pipe connected to the engine cylinder in any suitable manner. The exhaust tube 33 has a. muflier 35 connected at its free end which tends to muflle the explosions of the engine and render the engine substantially quiet.

In the present invention the mufiier and a portion of the exhaust tube which is extremely short, are contained within the easing 29 and so positioned that the muffler delivers the spent or exhaust gases in the same direction as the air currents are forced through the casing 29 by the forced pressure of the flywheel fan 2%.

By providing an extremely short exhaust tube and then delivering the gases to a casing through which a steady flow of air is being forced under pressure of the flywheel, will tend to eliminate the objection of back pressures forming in the exhaust tube, and at the same time will permit the final delivery of the exhaust gases to the atmosphere at any desired point of remoteness to the engine that is desired.

Thus, ifthe englne is being operated within doors, the casing 29 may readily be carried to the outside atmosphere and thus exhaust the gases entirely outside of the room or chamber in whch the engine is operating.

In Fig. 1 the casing 29 is shown as passing through a ceiling or wall 31 and exhausting the gases to the outside atmosphere.

From the above description it will be seen that when the engine is operating, and the flywheel fan 24 is rotating, the air will be drawn through the casing 27 into contact with the heated parts of the engine, and will then be passed through the flywheel and forced out through the casing 29-to the atmosphere. That is, the flywheel fan 2; functions as a suction fan, with regard to the drawing of the air into contact with the en gine cylinder, but tends to act as a forced draft fan with regard to the air passing out of the casing 29. p

It will be understood that this type of cooling the engine has simply been selected for the purposes of illustration and is not intended as a limitation in any sense.

The free end of the exhaust tube and its attached muflier are so formed and mounted within the casing 29, that the burnt gases will be delivered from the muffler in the same direction as the air'is being forced through thecasing 29, and it will therefore be seen that the air passing the mufller at a substantially high rate of speed, will tend to have a certain suction eflect upon the burnt gases coming from the Inufilerandwill therefore facilitate the exhausting of the gases fromthe engine.

In the aforegoing description the terms chosen to describe that element which tends to convey the products of combustion away from the engine cylinder. It-should be un derstood that these terms are not used. in the sense of a limitation as to the form of structure of said element, but are simply chosen because they are terms in common use in the art at the present time.

While the form of mechanism herein shown and described, constitutes a preferred form of embodiment of the invention it is to be understood that other forms might be adopted all coming within the scope of the claims which follow.

What I claim is as follows:

1. In a device of the character described,

the combination with an air-cooled combustion engine having exhaust passages; of a fan positively driven by the engine for effecting the circulation of the cooling air; means associated with the fan for conducting away the heated air driven off from the engine by the fan; and means connected with the exhaustlpassages and with the first named means at a point beyond the fan whereby the air passing out the first named means will assist in the conducting away of the exhaust gases.

2. In a device of the character described, the combination with a combustion engine having exhaust passages ;of a jacket for providing a passage for the cooling air about the engine; a fan driven by the engine for causing the circulation of air through said passage; a conduit associated with the fan for conducting away the heated air driven off from the engine by the fan; and an exhaust tube connected with the exhaust passages and leading into a conduit at a point beyond the fan. r I

3. In a device of the character described, the combination with a combustion engine having a cylinder, a jacket surrounding the cylinder and providing a passage for the circulation of the air about the cylinder; of a fan driven by the engine to cause a circulation of the air through said passage; a conduit surrounding the fan and having one end open to the atmosphere; and an exhaust tube connected with the exhaust passages of the engine and leadin into the conduit beyond the fan and having the free outer end thereof extending in the direction of the free open end of the conduit.

4. In a device of the character described, the combination with a combustion engine having a cylinder and crank case, a jacket surrounding the cylinder and crank case and providing a passagefor the circulation of air about the cylinder and crank case; of a fan driven by the engine to cause the. circulation of air through said passage; a conduit surrounding the fan and having one end open to the atmosphere; and an exhaust tube connecting the exhaust passages of the engine and leading into the conduit beyond the fan and having vthe free outer end thereofextending in the direction of the free open end of the conduit.

5. In a device of the character described, the combination with an internal-combustion engine having a cylinder and crank case, a jacket surrounding the cylinder and crank case and providing passage for the circulation of air about the cylinder and crank case; of a fan drivenby the engine to cause the circulation of an through said passage;

a conduit associated with the fan and having one end open to the atmosphere; a muffler connected with the exhaust port of the engine and located within said conduit at a point beyond the fan and having its outlet extending in the direction of the free opening of the conduit. In testimony whereof I affix my signature in the presence of two subscribing witnesses.

CHARLES F. KETTERING. Witnesses:

' J. W. MCDONALD,

WALTER W, RIEDEL.