US1253171A

US1253171A - Internal-combustion engine.

Info

Publication number: US1253171A
Application number: US18246617A
Authority: US
Inventors: Chester Grow
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-07-24
Filing date: 1917-07-24
Publication date: 1918-01-08
Anticipated expiration: 1935-01-08

Description

C. GROW.

INTERNAL COMBUSTION ENGiNE.

SHEET 1.

APPLICATION FILED JULY 24. 19H- Patented Jan. 8

2 SHEETS INVENTOR WITNESSES ATTo R N EY C. GROW. INTERNAL COMBUSTION ENGlNE. APPLICATION FILED JULY 24. 1911.

1,253,171, Patented Jan. 8,1918.

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INTERNAL-COMBUSTION ENGINE.

To all whom it may concern:

Be it known that l, CHESTER GROW, a citizen of the United States, residing at La Harpe, in the county of Allen and State of Kansas, have invented new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

This invention relates to internal combustion engines in which a high pressure combustion chamber and a low pressure combustion chamber are employed, the object inview being to provide in connection with an engineof the type referred to, simple and effective means for igniting a charge in the high pressure combustion chamber and transmitting a portion of the ignited mixture to the low pressure chamber at the time of ignition of the charge in the high prcssure chamber. a Y

A further object of the invention is to provide means for adjustin or varying the degree of compression in t e high compression cylinder in order to insure the ignition of the char es therein.

'lVith t e above and other objects in view, the'in'vention consists in the novel construction, combination and arrangement of parts, herein fully described, lllustrated and claimed.

In the accompanying drawings Figure 1 is a sectional view taken centrally of the high and Low pressure cylinders, showing the pistons at the beginning of their compression strokes.

Fig. 2 is a similar view showing the pistons at the beginning of their firing or working strokes. I

Fig. 3 is a similar view showing the pos1- tion of the parts when the high and low pressure cylinders are thrown-out of communication with each other.

Fig. 4 is a cross sectional view taken adjacent to the inner head of the low pressure cylinder.v

Referring to the drawings 1 designates the high pressure cylinder and 2 the low pressure c linder, the same being preferably forme integrally with each other as shown a1thou h it will be obvious that they may be forme separately and fastened together if found desirable. The high pressure cylinder is located at one end of and forms a lon- Patented Jan. e, was.

gitndinal extension of the high pressure cyl- The Valve 5 serves to relieve vacuum in the high compression cylinder, also to relieve compression and prevent the formation of a cushion in said high pressure chamber, and said valve also acts as a compression head, against which the charges are compressed by the action of the high pressure piston working in said cylinder. The valve 5 has an outwardly extending stem 6 and is surrounded by a compression spring 7 which is arranged'between a collar 9 on the'stem 6 and a head 8 on'the guide 4 through which the valve stem 6 is slidable.

Application filed July 24, 191?. Serial No. 182,468. I l

The low pressure piston is indicated at 10 l and has extending therefrom into the high pressure cylinder 1 a high pressure iston 11. Both pistons are equipped wit the usual packing rings and the high pressure piston 11 is formedwitha firing port or passage 12 extending longitudinally through a part of the high pressure piston and having a laterally opening po nt 13. The cylinder 1 is provided with a firing port or passage 14; corresponding substantially in shape and capacity with the firing port 12 in the high pressure piston 11. The ort 14 is however disposed reversely to the port 12 and has a lateral port or opening 15 through the inside wall of the cylinder 1.

The low pressure cylinder is shown as provided with a laterally offset valve chamber 16 at one side of which is arranged a spring seated intake valve 17 while at the opposite side of said chamber is the exhaust valve 18. Any suitable operatingrmeans, may be used in conjunction with the

valves

5 and 18 for operating the same at the proper intervals,

" compression stroke until the port 13 is covered by the high pressure cylinder. Prior to that time part of the mixture in the low compression chamber has been forced through the passage 14; into the high compression cylinder. Just as the port 13 is I a covered by the high compression cylinder,

- compressed b as the extremity'of the high pressure istonf com-i reaches the limit of its movement an presses the charge in thehigh pressure cylinder to the ignition point, the

ports

13 and 15 register and a portion of the ignited charge in the cylinderl rushes through the port 15 and passage 14 and ignites the relatively large charge in the'low compresslon cylinder 2. The

ports

13 and 15 are then covered during the remainder of the firing or working stroke. In the exhaust strokes, the

valves

5 and 18 are unseated by the operatin connections referred to thus allowing for the free exhaust of the burned gases from both the high compression and low compression cylinders. In the full suction stroke, the valve 17 opens automatically to let in a fresh charge of mixture while the valve 5 opens to relieve the vacuum which would otherwise be created in the high pressure cylinder 1. Thus the valve 17 opens once only in each complete cycle of the engine while the valve 5 opens twice during such complete cycle of the engine. The valve 5 of course remains closed during the firing stroke and at such time forms the ,headof the high pressure cylinder against which the charge contained therein is compressed to a high degree by the piston 11.

It will be observed that the engine does away with the present unreliable system of ignition and also embodies an extremely simple construction, the engine being thus particularly adapted for use in connection with aeroplanes, dirigibles and other aircraft.

I claim I 1. In an internal combustion engine, a low pressure cylinder, a high pressure cylinder extending from one end of the low pressure cylinder, said" high and low pressure cylin ders having their longitudinal axes coincident, a low pressure piston operating in the low pressure cylinder, a high pressure piston having a fixed relation to and projecting from the low pressure piston, and a vacuum and compression relief valve in the head of the high compression cylinder, the high compression cylinder and the high compression piston being formed with firing passages which are brought into communication when the high pressure piston reaches the point of highest compression in the high pressure cylinder, whereby a portion of the mixture ignited at such point is transmitted to the low pressure cylinder to ignite the charge therein.

, the point of highest cylinder,

2. In an internal combustion engine, a. low pressure cylinder, a high pressure cylinder extending from one end of the low pressure cylinder, said high and low pressure cylinders having their longitudinal axes coincident, a low pressure piston operating in the low pressure cylinder, :1 high pressure piston having a fixed relation to and proecting from the low pressure piston, and a vacuum and compression relief valve in the headof the high compression 0 linder, the high compression cylinder an the high compression piston being formed with firing passages which are brought into communication when the high pressure piston reaches compression in the high pressure cylinder, whereby a portion of the mixture ignited at such point is transmitted to the low pressure cylinder to ignite the charge therein, the low pressure cylinder being controlled by an intake valve and an exhaust valve adjacent to the head thereof.

3. In an internal combustion engine, a low pressure cylinder, a highpressure cylinder 1 extending from one end of the low pressure said high and low pressure cylinders having their longitudinal axes coincident, a low pressure piston operating'in the low pressure cylinder, a high pressure piston having a fixed relation to and projecting from the low pressure piston, and a vacuum and compression relief valve in the head of v the high compression cylinder, the high compression cylinder and the high compression piston being formed with firing passages which are brought into communication when the high pressure piston reaches the point of highest compression in the high pressure cylinder, whereby a portion of the mixture ignited at such point is transmitted to the low pressure cylinder to ignite the charge therein, each of said firing passages embodying a portion extendinglongitudinally of the respective part in which it is formed and also embodying a laterally opening )ort intersecting said longitudinal portion 0 the passage, one of said lateral ports opening into the high compression cylinder and the other of said ports opening into the low compression cylinder.

' 4. In an internal combustion engine, a low pressure cylinder, a high pressure cylinder extending from one end of the low pres sure cylinder, said high and low pressure cylinders having their longitudinal axes coincident, a low pressure piston operating in the low pressure cylinder, a high pressure piston having a fixed relation to and projecting from the low pressure piston, and a vacuum and compression relief valve in the head of the high compression cylinder, the high compression cylinder and the high compression piston being formed with fir ing passages which are'brought into communication when the high pressure piston reaches the point of highest compression ishing the'distance between said wire and in the high pressure cylinder, whereby a i the adjacent head of the high ressure pieportion of the mixture ignited at such point ton when the latter is at the limit oft its com 1o is transmitted to the low pressure cylinder pressing movement.

5 to ignite the charge therein, said vacuum In testimony whereof I a my signature,

and compression relief valve being adjustable for the purpose of increasing or dimin- I CSTER GRUWO