US1226239A

US1226239A - Gas-engine.

Info

Publication number: US1226239A
Application number: US73705612A
Authority: US
Inventors: Robert W Muir
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-12-16
Filing date: 1912-12-16
Publication date: 1917-05-15
Anticipated expiration: 1934-05-15

Description

. R. W. MUIR.

GAS ENGINE.

APPLICATION FILED nic. 1e. 1912.

Patented May 15, 1917.

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HTORJYE YJ R. W. MUIR.

GAS ENGINE.

APPLlcAloN FILED 056.16.1912.

Patented; May15,1917.

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ROBERT W. MUIR., OF HUNTER., NORTH DAKOTA.

GAS-ENGINE.

Specication of Letters Patent.

" Patented May 15, 1917..

Application led December 16, 1912. Serial No. 737,056.

To all whom t may concern:

Be it known that I, ROBERT W. Mum, a citizen of the United States, resident of Hunter, in the county of Cass, State of North Dakota, have invented certain new and useful Improvements in GasEngines, of which the following is a specification.

My invention relates to" internal combustion engines of the four-cycle type and the object of the invention is to reduce the number of parts usually required in the operation of an engine of this type and thereby cheapen the manufacture of the engine.

A. further object is to increase the etliciency of the engine by providing means for applying the power throughout the greater proportion of the stroke.

A further object is to provide an engine in which the usual noisy reciprocating valves will be omitted, and thereby the engine will be rendered more durable and will operate with less noise than engines of this type as usually constructed.

Other objects of the invention will appear from the following detailed description.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in 'the ciaims.

ln the accompanying drawings forming part of this specification,

Figure 1 is a vertical sectional view through a gas engine cylinder embodying my invention, the piston being illustrated at the end of the compression stroke or at the 'beginning cf the explosion stroke,

Fig. 2 is a similar view taken on a section line at right angles substantially to the section line of Fig. 1, illustrating the piston the end of the explosion stroke or the beginning of the scavenging stroke,

Fig. 3 is a sectional view on the line mof Fig. 1, o

Fig. 4 is a sectional view on the line y-y of Fig. 2,

Figs. 5, 6, 7 and 8 are diagrammatic views illustrating the successive steps or strokes of the engine, beginning with the suction stroke for the first quarter, the compression stroke for the second quarter, the explosion stroke for the third quarter, and the scavengingor exhaust stroke for the fourth quarter,

Fig. 9 is a detail sectional view of the rotating valve, showing the position of the lugs thereon and the position of the valve during the explosion stroke, i

Fig. l() is a similar view, illustrating the movement of the valve during the exhaust or scavenging stroke,

Fig. 11 is a detail view illustrating the means for operating the rotating valve from the rocking end of the connecting rod.

In the drawings, l2 represents the crank case, 3 a cylinder and 4 the crank shaft having a connecting rod 5. 6 represents the gas intake port in the walls of the cylinder, connected by suitable means with a carbureter and a source of gas supply, not shown. 'Z' is an exhaust duct provided in the walls of the cylinder. rlhe cylinder is also preferably provided with a supplemental exhaust opening or port 8. 9 is a piston having bearings at 10 for a cross head 11 on the end of the connecting rod. The piston is also provided with iongitudinal ducts or

passages

12 and 13 arranged to register respectively with the intake and

exhaust ports

6 and 7. These

passages

12 and 13 extend preferably from end to end of 'the piston so that they will be in communication with the ports in the walls of the cylinder throughout the stroke of the piston, the communication of the ducts with the combustion chamber of the cylinder being regulated or controlled by the rotary valve, as will hereinafter appear.

The inner end of the vpiston is provided with

horizontal ducts

14 and 15 extending around a portion of the circumference of the piston and separated by a wall 16. The duct 14 communicates with the intake passage 12 and the duct 15 with the exhaust passage 13. Upon the head of the piston 1 arrange a flat valve disk 17 adapted to rotate in a guide 18 and tting snugly on the head of the piston. This valve is imperforate, except for a single port 19 which is adapted to register'successively with the inlet and exhaust passages and with the ducts 14E and 15, as the valve is revolved.

Evidently if the valve starts from the position shown in Fig. 5 and revolves toward the right, the intake port will remain in communication through the duct 14: with the combustion chamber of the cylinder during the first quarter of the revolution of the valve, and the intake at the beginning of the vsecond quarter of the revolution will be closed, as indicated in the diagrammatic view (Fig. 6), and both intake and exhaust ports will remain closed during the compression and explosion strokes. On the last quarter of the revolution of the valve its port 19 will register with the exhaust passage and the duct and the burnt gases will escape through the exhaust opening. When the piston is near the end of the power stroke the auxiliary exhaust opening 8 will be uncovered and the pressure in the cylinder will fall to' that of the atmosphere. A lip or flange is preferably provided on the edge of the valve and is adapted to close the auxiliary exhaust when the piston is at the lower end of its suction stroke,

arms 21 and 22 are arranged to straddle.

these pins and lugs successively lin the rocking movement of thek cross 'head 11 in the reciprocation of the piston and connecting i. rod. The pins 23 are considerably longer than the lugs 24 and when the short arm 21 engages one of the long pins 23 the rocking of the cross head will impart a rotary movement to the valve commensurate with the stroke of the connecting rod and the length of the arm 21. As the connecting rod swings to and fro with the revolution of the crankshaft the arms 21 and 22 are rocked beneathvthe rotary valve and engage the lingersI 23 andlugs 24: respectively and sucmovement of the valve7 and the lugs or'pins cessively to impart a rotary movement to the valve. This engagement of the arms and the lingers and lugs is clearly-shown in Figs. 9 and 10, wherein it will be noted that when one arm is performing its function Iand rotating the valve a quarter turn, the other arm is in' engagement with a lug ornger to prevent overthrow or excess of t are so disposed with respect to one another and the center of the valve and the rocking arms that when one arm engages its pin or lug the other arm is in position with respect to its finger or lug to allow the free rotation of the valve.

rately timed withv the stroke of the piston to admit a fresh charge to the cylinder and cut 0H the intake and open the exhaust at the* proper time to discharge the burnt gases from the cylinder. As the piston goes down on its intake stroke the swing of the connecting rod will move the valve so that its port will register with the gas intake and remain in communication with said intake to the end of the stroke. The continued rotation ofthe valve will then close the intake on the' compression stroke or second quarter The movement ofv the valve will thus be continuous and accuand will remain closed during the third quarter as the piston moves down on the power stroke. When near the end of the power stroke the auxiliary exhaust will be uncovered and the pressure of burnt gases in the cylinder will be relieved, and when the piston starts back on the scavenging stroke the port in the valve will register with the exhaust and continue in register therewith to the end of the fourth quarter, when the valve will' again be operated to communicate with the intake port and repeat the operation.

I have in this engine eliminated all reciprocating valves and thereby greatly reduced the noise of the engine and the expense of maintenance, and have also dispenseel with numerous parts` necessary to the reciprocating valve construction.

In various ways the details of construc' tion,' such as the manner of rotating the .valve from the'rocking end of the connect- ,ing rod, may be modified and still be with- 4`inthe scope of my invention.

I claim as my invention 1. An internal combustion engine of the four-cycle type comprising a cylinder having inlet and exhaust ports, a piston having passages extending substantially from end to end thereof and communicating continuously with said ports respectively throughout the stroke of. said piston, a connecting rod, a valve mounted to revolve on the head ofsaid piston and having a port arranged to register successively with said inlet and exhaust ports, and means actuated by the rocking of said connecting rod for operating said valve.

2. An internal combustion engine of the four-cycle type comprising a cylinder having inlet and exhaust .ports and an auxiliary exhaust port, a piston having passages communicating with said ports respectively7 a connecting rod for said piston, a valve mounted to revolve on the head of said piston and having a port arranged to communicate successively with the main exhaust port and said inlet port, said valve having a lip -or flange that is adapted to cover said auxiliary exhaust port when said piston is at a predellllU termined point in its suction stroke, and i means actuated by the rocking of said connecting rod for operating said valve.

3. An internal combustion engine of the four-cycle type comprising a cylinder having inlet and exhaust ports, a piston having passages therein communicating respectively with said ports, a valve lmounted to revolve on the head of said piston and having a port arranged to communicate successively with said passages, a connecting rod for said piston, and arms mounted on said connecting rod and having means for engaging and operating said valve during vthe rocking movement of said rod. l

4. An internal combustion engine comprisnaaaase ton and having a port arranged to communicate successively With said'passages, a connecting rod pivotally connected with said piston andhaving forked arms `of varying length thereon, said valve having depending lugs and fingers of varying length in the path of said forked arms, for the purpose specifed.

5. An internal combustion engine comprlsing a' cylinder having inlet and exhaust ports, a piston having passages communicating with said ports respectively, a valve mounted to revolve'on the head of said piston and having a port arranged to communicate successively With said passages, a connecting rod pivotally connected With said piston and having forked arms of varying c length thereon, said valve having depending -lugs and fingers-of varying length in the path of said forked arms, one of said arms engaging a linger of said valve to actuate the same While the'other arm engages a lug of said valve to prevent overthrow thereof, for the purposespecied.

6. An internal combustion-engine of the four-cycle type comprising a cylinder having inlet and exhaust ports, a. piston having passages extending lengthwise thereof and communicating continuously with said ports respectively throughout the stroke of said piston, said passages having lateral .extensions in the head of said piston, a valve mounted to revolve on the head of said piston over y said extensions and having ya port arranged to communicate successively With said passages through said extensions,.a connecting rod for said piston,'and a step by step means actuated by the'rocking of said rod for moving said valve.

. 7. Anjmternal combustion engine of the four cycle type comprising a cylinder having inlet and exhaust ports, a piston having y longitudinal passages arranged to communicate with said ports, said assages having lateral extensions in the-hea of said piston,

anda Wall separating one vextension from the other extension of said passages, a valve mounted to revolve on said piston over said extensions and having a iport arranged to communicate successively with said passages ,through said extensions, a connecting rod for said piston, and means actuated by the rocking of said rod for revolving said valve.

8. lAn internal combustion engine comprising a cylinder having inlet and exhaust ports, a piston having passages therein communicating respeetivelyvvith said ports, a valve mounted to revolve on the head of said piston and-having a 'port arranged to cmmunicate successively With said passages, a

' connectingrod for said piston, said valve having proJections thereon arranged in pairs upon opposite sides .of its axis, the projections of one pair beinga greater distance from said axis than the projections of the other pair, and means actuated by the rocking ofsaid connecting rod and engaging said projections to revolve said valve.

9j., An internal combustion engine comprising a cylinder having inlet and exhaust ports, a piston provided With passageways opening communication betWen said respective ports and theinterior of the cylinder in A front of said piston, a valve mounted to revolve on the head of said piston and having a port, and means actuated by the rocking of said connecting rod with each cycle of operation of the engine to bring said valve port into position to successivelyopen and close said inlet'and exhaust ports.

` 10; A11 internal combustion engine ofthe four-cycle type comprising a cylinder having inlet and exhaust ports, a piston having passages therein communicating continuously With said ports respectivelythroughout the stroke of said piston and a valve having a port arranged to register successively With7 said inlet and exhaust ports, and means actuated by the rocking of said connecting rod for operating said valve.` v -In Witness whereof, I have hereunto set my hand` this 9th day of December, 1912. ROBERT W. MUlR. --Witnessesa H. l?. Gm,

GEO. R. RELSEY.