US1191827A - Internal-combustion engine. - Google Patents

Description

e. 0. REESE. LNTERNAL COMBUSTION ENGINE.

v 7 APPLICATION FILED NOV- 26, 1915 1 ,1 91 ,27. I x Patented July 18, 1916.

E a SHEETS-SHEET 1.

G. C. REES-E. INTERNAL COMBUSTION ENGINE.

I APPLICATION FILED NOV. 26. I915- 1,1 91,827 1 31mm July 18 1,916.

3 SHEETS-SHEET 2- e. c. REESE. INTERNAL COMBUSHON ENGINE.

APPLICATION FILED NOV-26.1915.

Patented July 18, 1916.

3 SHEETS-SHEET a.

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g-KWVW at the same time with a i'elativelyvhighelii- UNITED STATES specification.

ence being had ings, in' which,

l igui'esfl-l' and are 0l0\'2 llll()llS partly in OFFICE;

-GEORGE C. REESE, --OF DARBY, PENNSYLVANIA,

mrrs mAL-coivmusmon ENGINE.

halite/tom it-may concern: I i

Be it known that LGEORQE C, REESE, a

citizen of the United States, residing in Darby,'Delawarecounty, State 'of Pennsylvania,.haveinvented an Iiite'r ial-Coii bustion Engine, of \YlIICli the following is a \Vhile it is recognized that engines of the two cycle type are considerably cheaper to,

build as well as simpler to operatethan those of the four cycle type, they are not .fitted for many classes of work owing to 7 their low power and eiii'ciency resulting from their slow speed. I

.()no ob ect therefore of my invention s to provide an internal combustion engine:

of either the two or four cycle type whose construction shall be such that it will be possible for it to opei'ateat ni atei'ially higher speeds than are now allowable for engines of'the same piston displacement and ciency. 1 i

"More particularly the nventionconteinplates the provision of-an internal coinbnsQ tionenginewith means whereby the speed ofits piston-shall be iiiaterialjlydecreased at" certain parts of itssti'oke and correspondingly increased at other parts, in order to permit of the proper exhaust of t'he products of-comlnistion and the intake of a sutlicient fuel charge while -reducing the;

tune in which heat may be radiated from the 7 .hot gases of the. exploded charge to the piston, cylinder, water jac'ket,-etc.

"These ob'ects and other advanta eous.- l)

ends I secure as hereinafter set forth, r'efei;

to the accompany ng drawsection and to some extent diagrammatic 4 with a crank shaft 5 in the well known 'inanner. According to my invention I proillustrating a two cycle engine equipped with my invention; andl ig. 3 is an elevation partlyin' section illustrating the invention as applied to an engine of the four cycle type.

In the above drawings 1 represents the i' cylinder and 2'tlie crank case of a two cycle engine having-a piston 3 connected by a rod vide an auxiliary 'or counter shaft 6 parallel with the crank shaft ,5and. on itmount a i'ly wheel 7, connectiiig said two shafts by.

gears- 8 and 9, Said gears are primarily eccentrically mounted, being preferably I Specification of Letters Patent.

Patented Jiily s, 1916.

'Application filed No ember 26, 1915. Serial No. 63513.

ellipticalin outline and in both cases the center lines of the shafts-o and '6 pass respectively through'one of the principal foci of the gear which v is mounted [upon it. Moreover the gearS is so set on the shaft 5 that when the piston 23 is at the upper. end I of its stroke it is'engaged by those teeth of the gear 9 farthest from the shaft (Sand at v a minimum distance from said shaft 5.

Obviously after such an engine has been brought up. to speed,the explosion of a charge in its cylinder will'force its piston down'at 'a ianaxnnum speed and transmit power through" the shaft to the machine to bedriven, a certain", being stored by the 1 piston reaches the en'd oflits stroke and uncovers the exhaust pprt, it is permitted to move at a lower ratejieven though the shaft continue its revolution at'a' uniform speed, 'the gear 9 bn the shaft 6 driving the gear 8 on the shaft 5 the elliptical 'istrnction illustrated; .The san'ie ,conditio exists after the exhaust of thG'PIOdiICfS of combustion hasoccurred and the fuel inlet port 11 has been opened, al-" though the speed of the piston is gradually increased during the compression stroke engine equipped with my invention would operate at a materially higher efficiency because of the *reducedloss of heat during the expansion of the hot gases." By the invene .tion above described itlis thus possible for a two cycle engine to beeinployed for work where its slow speed and poor efficiency have hitherto pi'ohibited'such use. f

If desired my invention maybe applied to engines of the four cycle type by providing acounter shaft 13 and a pair of coactat a" reduced speed owing. to

"ms portion, of said power ly--wlieel.v \Vhen said N (5 under the action of the'fly wheel tendsito until, when the charge is exploded, it.is again forced downward at a speed which 100. time. with thesame p iston displacement an i ing eccentrically mounted gears 14 and 15 as illustrated in Fig. 3;one of said gears being mounted on the crank shaft 16 and the other on said counter shaft which also -arries the fly \vheel 17. The gears l-l and 15 are so sct in this instance that the speed of the crank shaft 10 is higher than that of the counter-shaft 13 on the firing and intake strokes but is less than that of said shaft on the compression and exhaust strokes. As before, owing to the increased piston speed during the tiring stroke, less time is permitted for the radiation of heat from the hot gases to the cylinder, piston, etc., so that a higher efficiency of operation is secured. At the sametime owing to the reduction of speed 7 the piston during its compression and exhaust strokes, the engine may be operated without loss of el'liciency at higher speeds than have hitherto been allowable.

111 both the two cycle and four cycle types of engine employing my invention it will be understood that the fly wheel on the counter shaft retains the latte and the apparatus driven therefrom at a substantially constant speed while the crank shaft and the parts attached thereto are caused to operate at a speed which varies during each stroke as above indicated. 'hile .l have illustrated my invention as applied to a single cylinder engine, it is obviously immaterial whether said engine be equipped with two or more cylinders since the counter shaft with its fly wheel and the gears connecting with the crank. shaft perform the same function in any case. i

As will be understood by those skilled in the art, the setting of the gears 8 and 9 is not necessarily limited to the relative positions shown in the drawings, since it is conceivable that it may be advantageous to have the variations in speed of the two shafts 5 and ,(3 occur at points in the cycle in the 'engine vother than those above described. It will-further be nnderstood that when the main shaft'6 isto' be driven by power from ..-a.,num-ber of cylinders, these may be grouped around it in any manner best suited to econom1ze; space or-secnre; any other desired reisult w thout depart ngfrom my invention.

the crank shafts being connected to said main shaft through gears as above described.

I claim 1. The combination in an internal combustion engine of a crank shaft; a counter shaft; means tending to maintain the speed of the counter shaft substantially uniform; and means connecting said shafts for causing the speed of the crank shaft to vary during each stroke.

2. {the combination with an internal combustion engine having a crank shaft of a counter shaft; a fly wheel on said counter shaft; and means connecting the crank shaft and counter shaft for causing variation of the speed of the former while allowing the latter shaft to rotate at a substantially uniform speed.

3. The combinatitm with an internal combustion engine having a crank shaft of a counter shaft; elliptical gearing connecting said shafts; and a fly wheel on the counter shaft.

l. The combination with an internal combustion engine having a crank shaft of a counter shaft; ecccntrically mounted gears connecting said shafts; and a fly wheel on the counter shaft.

5. The combination with an internal combustion engine having a crank shaft of a counter shaft; a fly wheel on the. counter shaft; .with eccentrically mounted gears connected between said shafts and set to cause a retardation of the piston speed during the exhaust of the products of combustion.

6. The combination with a two cycle internal combustion engine having a crank shaft of 'a con 1' shaft; a fly wheel on the counter shaft; with gearing connecting said shafts mounted to permit rotation of the crank shaft at a higher speed than the counter shaft during the firing stroke of thepiston, and to allow said crank shaft to move at a speed lower than that of the take.

GEORGE O. ltl ll lSl l.

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