US1125072A - Gas-engine. - Google Patents

Description

O. M. DB LAUNTY GAS ENGINE.

APPLICATION FILED JAN.16,1918.

Patented Jan. 19, 1915.

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GAS ENGINE.

APPLICATION FILED 51111.16 1913v Z 5 m2 1. w@ 9 .1 mm m 0. M. DB LAUNTY.

GAS ENGINE.

APPLICATION FILED JAN. 16. I913v gg gyg Patented Jan 19, 1915.

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UNITED srn rns PAEENT oFFroE.

OLIVER M. DE LAUNTY, OF CHICAGO, ILLINOIS, ASSIG-NOR T CHARLES H. 3' OF CHICAGO, ILLINOIS.

GAS-ENGINE.

Specification of Letters Patent.

Patented Jan. 19,1915.

Application filed January. 18, 1513. Serial No. 742,423.

0 all whom it may concern:

Be it known that I, OLIVER M. DE

' LAUNTY, a citizen of the United States, and

resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Gas-Engines, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to gas engines, and more particularly to those of that type having cylinders bored to two diameters and operated in pairs, the smaller bore of each .cylinder being'connected with the larger bore of the other cylinder and the latter serving as a pump chamber for receiving and compressing the explosive charge. Certain features of the invention, however, are applicable to gas engines generally. and the object of the invention is to provi-...e a engine which shall be eilicicnt in operation and of improved form in structural detail.

A feature of the inv tion provides an independent chamber in mediate the pump chamber and the power cylinder and serving to prevent the production of too great a pressure in the pump chamber, while still permitting such chamber to supply the ex plosive charge in the required quantity.

The invention is exemplified in the struc ture to be hereinafter described, and which is illustrated. in the accompanying drawings, wherein Figure 1 is a side View of a gas engine embodying the features of improvement provided by the invention, some of the parts being shown in section and the planes of the section being indicated by the broken line l1 on Fig. 2; Fig. .2 is a plan sectional view of the engine taken on the broken line 2-2 of Fig. 1; Fig. 3 is a detail plan sectional view taken on the line 3-3 of Fig. 1; Figs. 4 and 5 are detail perspective views, partly in section, showing the construction of a check valve used in the engine; and Figs. 6 and 7 are sectional views taken on the broken lines 66 and 77, respectively, of Fig. 2.

The engine illustrated in the drawings comprises four cylinders. These are generally designated by the numerals 10, 11, 12 and 13. They are preferably surrounded by a common water jacket 1%. As shown, the walls. of all of the cylinders 10, 11, 12 and. 13, and the side walls of the. water jacket let are cast integral in one piece. The water jacket H has an oblong rectangular opening 15 at its top, and a continuous outstanding foot flange 16.

The usual crank case 17 is provided below the cylinders. This crank case provides bearings 18, 19, for the crank shaft 20, and is made rigid with the walls of the several cylinders, as by being secured to the foot flange 16 by bolts 21. The top opening 15 of the water jacket 14 is normally covered by a removable top plate The top plate is formed with a nipple 23 adapted to serve as an outlet for water delivered to the chamber of the jacket M. This water is. preferably provided at the lower part of the chamber of the jacket, as through a duct 24 which leads through an opening in the end wall of the jacket.

A piston, as 26. 2? and 28, operates in each of the cylinders 10, 11, 12 and 13. These pistons are connected by pitinen, as to the several cranks 30, 31, 32 and 33 respectively of the crank shaft 20. Preferably the cranks of the crank shaft 20 are so arranged that the twb pistons, as :25, 26, and 2?, 28, of the pair of cylinders adjacent each end of the engine act in alternation, and that one piston of each of such pairs acts inter.- mediate the two pistons of the other pair.

The corresponding cylinders of the two pairs and the pistons therefor are preferably of like construction. Each cylinder is shown as being bored upon two diameters whereby it is provided with an outwardly facing annular shoulder 34: intermediate its ends. When so constructed the part 35 of the cylinderabove the shoulder serves as a power chamber and the part 36 of the cylinder below the shoulder serves as a pump chamber. The pistons 25, 26, .27 and 2-8 are ,each of a form complementary to that of the cylinder within which they respectively 0pcrate. Each piston accordingly has a smaller upper portion 37 and a larger base portion 38. the two portions 37 and 38 be ing located upon opposite sides of an annular shoulder 39.

The explosive charge is most desirably supplied downwardly through the cover plate 22 of the water jacket, as from a pair of nipples one of which is shown at 40. Each of these nipples leads from the usual manifold (not shown) and is secured to the. cover plate 22 by bolts $1. .Ducts, as. 42 and cover plate 22,- is

43, lead downwardly within the chamber of the water jacket 14 from the nip le 40 to the pump, chamber portions 36 0 the two adjacent cylinders, as 10, 11 or 12, 13. Preferably each 'ofthese ducts leads into the corres pending-rpump chamber. 36, through a t, irs D 44, located upon the annular shower 34 of the c linder wall. Most desira ymdownward y opening check valve is located in each of the ducts 42, 43. In order that this check valve may be adjacent the port 44 and still be readily movable at the top of the engine upon removal of the it is carried by a sleeve 46 which fits within the duct. This sleeve rests upon an annular shoulder 47 formed in the Wall of the duct, as 42- (Fig. 7). The cover plate 22 engages the higher end of the sleeve to prevent its displacement. l

I Transfer passages, as 48,49, extendbe tween the larger bore 36 of each cylinder and the smaller bore '35 of the. other cylinder of the same .pair'. Most desirably these transfer passagesliko the ducts 42, 43 are cored into parts of the integral casting from which the cylinder walls and the side walls of the water jacket 14ers produced.

- 5 shown, the portebpenings, as 50, 51, at

the; opposite ends oil the ducts 48, 49, are

located upon the annular shoulder 34- of one cylinder and upon the side wall of the smaller 'portiq 35 of the adjacent'cylinder respectively. y this means the explosive charge drawn from the duct 42 or 43 upon the downward movement of the piston is transferred to the smaller portion 35 of an adjacent cylinder upon the upward movement of the piston. To prevent too high a pressure being exerted at the port 51, an independent intermediate chamber communicating with each of the transfer passages, as 48, 49, is preferably provided. Two of these independent intermediate chambers are shown in the drawing at 52 and-53. They are conveniently formed by coring out a part of the common wall between the two adjacent cylinders, as 12, 13 above the transfer passages 48, 49, with which they respectively communicate.

'A check valve, as 54, is preferably provided in each of the transfer passages 48, 49, below the corresponding intermediate chamber 52 or 53. As showneach of the check valves is constructed to be removed through the top of the corresponding intermediate chamber 52, 53 when the cover plate 22 of the water jacket 14, has been removed. To this end, the top of each of the intermediate chambers 52, 53 is preferably closed tion of each of thecheck valves 54, is more so and by a screw cap 55 (Fig. 6). The construc-' renapvably connected as by a screw threaded engagement between the periphery of the cap 57 and the rimof the cup shaped base portion 56. The floor of the base portion 56 is provided with a plurality of aperturesfrom its seat upon the removal of the top plate 22 and closure 55, the cap 57 is preferably'prcvided Wltllfin u wardly extending central stem 61. The higher end of this stem is of reduced diameter and has sliding engagement with the closure plate 55. A

spring 62 coiled about the upper end of the stem 61 and reacting between the under side of the closureplate 55 and the annular shoulder 63 upon the stem, serves for yieldingly holding the check valve 54 against its seat upon the shoulder 60. Preferably the sprin 62 will be of such strength as to pre vent valve except in the event of an explosion of gas in the corresponding pump chamber 36.

The several cylinders as 10, 11, 12 and 13; ofthe engine have exhaust ports, as 64, 10-" cated upon the side walls of the cylinder in: the manner usually employed in the case of two-cycle gas engines. Ducts, as 65, 66 and 67 communicate with the several exhaust ports 64 to deliver the products of combus tion through. the side wall of the water jacket 14. Preferably the walls of these ducts are formed integral with the walls of the cylinders and the side wall of the water jacket. The ducts 65 and 67 communicate with the exhaust port 64 of the cylinders 10 and 13, respectively. The duct 66 extends outwardly from between the cylinders '11 and 12 and communicates with the exhaust ports 64 of both of these cylinders.

By making the several parts of the engine in about the proportions showmin the drawings, the volume of each pump chamber 36 is greater than the volume of the combustion chamber 35 to which it delivers.

' By forming the intake ports 44 and outlet ports 50 upon the annular shoulder 34 and by locating the check valves 45 and 54 adja-. cent 'these' ports, respectively, a complete new charge of gas is drawn into each of the pump chambers 36 at each downward stroke of the corresponding piston andall of this gas is expelled from, such pump chamber at the next up stroke of the piston. By these displacement of the casing of the check.

7 completely surrounded with hot Water contained this jacket, there will be no condensation of the vapors in these chambers such as usually occurs when a part of the es plosivecharge is temporarily retained in an intermed ate chamber.

I claim as my invention- 1. In a gas engine, in combination, ii-pair of cylinders each having a bore of two diameters, pistons operating in ylinders in alternation, each piston having an unperforate surface complementary in form to the bore of the corresponding cylinder, an induction port at the inner end of the larger bore of each cylinder, a pair or? independent transfer passages extending between the cylinders, the port openings at the opposite ends of each of said transfer passages being at the inner end of the larger-bore of one cylinder and at the outer end of the smaller bore of the other cylinder, respectively, and a check valve in each of the said transfer passe 2. gas engine, in combination, a pair of cylinders each having a bore of two diameters, pistons operating in said cylinders in alternation, each piston having an imperiora-te surface complementary in form to the bore of the corresponding cylinder, an induction port at the inner end of the larger bore of each cylinder, a checkvalve controlling cachof said induction ports, a pair of independent transfer passages extending between the-cylinders, the port openings at the "opposite ends of each of said transfer pa'ssages being at the inner endof the larger bore of one cylinder and at the outer end of the smaller bore of the other cylinder, re-

the other cylinder, respectively, and a, check valve in each or the said transfer passages.

l. in a gas engine, in combination, E

power cylinder, a Water jacket surrounding the cylinder, a removable cover plate nor mally closing the top of thqvater jacket, an induction passage extending through the water jacket and its cover plate and opening at its lower end into the cylinder and having an instanding shoulder in its well adjacent its lower end, a removable bushing fitting the said induction passage and extending between the said shoulder and the under side of the said cover plate. and a check valve mounted at the lower end of the bushing and removable therewith upon eniovel oi the cover plate of the Water in combination, a pair of cylinders, the bore of each cylinder having an outwardly shoulder interits ends, piste reciprocating alternation one in each cylinder, each piston having an imperforate surface complementary in form to the bore of the corresponding cylinder, the piston displacement in the larger bore of each cylinder being greater than the piston displacement in the smaller bore of the other cylinder. an induction port located upon the said annular shoulder of each cylinder, a check valve controlling each of the said induction ports. a pair of transfer passages extending between the cylinders. the port openings at the opposite ends of each of said transfer passages being upon thesaid annular shoulder of one cylinder and at the outer end of the smaller bore of the other cylinder. respectively, and

a check valve in each of he said transfer passages.

6. In a gas engine, in combination, a com'-; bustion chamber, a compression chamber, an intermediate chamber communicating with "both of the first mentioned chambers but spoctively, and a check valve in each of the slid transfer passages.

i 3, In a gas engine, in combination, a pair of cylinders, the bore of each cylinder having an -outwardly facing annular shoulder intermeiliate its ends, pistons reciprocating 'in alternation one in each cylinder, each piston having an imperforate surface complementary in form t-o'the bore of the corre sponding cylinders, an induction port lo cated upon the said annular shoulder of each cylinder, :1 check valve controlling the said induction port, apair of independent trans fer passages extending between the cylinders, this port openings at the opposlte enkls having no-other opening, a check valve be tweenthe compression chamber and the intermediate chamber, an explosive charge induction passage leading to the compression chamber and plungers Working in the coin bustion chamberand compression chamber in alternation.

7. In a gas engine, in combination, a pair of combustion chambers, a pair of compression chambers, independent intermediate chamber communicating with. eachfot the compression chambers and one of the corn bust-ion chambers out having no other opening, a check valve located between each compression chamber and the corresponding intermediate chamber, an explosive charge in duction passage leading to each compression chamber, and plungere working in the a. i g

I compression and combustion chambers of each pair in alternation.

8. In a gas engine, in combination, a com-v bustion chamber, an intermediate chamber, a water jacket surrounding both of said chambers, a compression chamber, an induction passage leading through the water jacket to the compression chamber, a check valve between the compression chamber and the intermediate chamber, and plungers working in the combustion chamber and the compression chamber inalternation. Y

9. In a gas engine, in combination, a combustion chamber, an intermediate chamber,

a water jacket surrounding both of said chambers, a compression chamber, an induction passage leading through the water jacket to the compression chamber, a check valve controlling the opening of the induction passage into the compression chamber,

a check valve between the compression chamber and the intermediate chamber, and plungers working in the combustion chamber and the compression chamber in alternation. 7 I

10. In a gas engine in combination, a pair of cylinders, the bore of each cylinder having an outwardly facing annular shoulder intermediate its ends, pistons reciprocating in alternation one in each cylinder, each pis- 4 ton having an imperforate surface complementary in form to the bore of the corresponding cylinder, an induction port located upon the said annular shoulder ofeach cylinder, a check valve controlling eachof the said induction ports, a pair of transfer passages extending between the cylinders. the

port openings at the opposite ends of'each of said transfer passages being upon the said annular shoulder of one cylinder and at the outer end of the smaller bore of the other cylinder, respectively, a check valve in each of the transfer passages, and an independent intermediate chamber communieating with each of the transfer passages between the check valve and the port open ing of such transfer passage into the smaller bore of the corresponding cylinder.

11. In a gas engine, in combination, a combustion chamber, a water jacket therefor, an intermediate chamber located within the chamber of the said water jacket, a comression chamber, an explosive charge induction passage leading to thecompression chamber, a check valve between the comprcssion chamber and the intermediate chamber and plungers working in the com-- bustion chamber and the compression chamber in alternation.

12. In a gas engine, in combination, a combustion chamber, a water jacket therefor, an intermediate chamber located within the chamber of the said water jacket, a compression chamber, an explosive charge induction passage leading, to the compression chamber, a checkvalve between the compression chamber and'the intermediate chamber, and plungers working in the comgustion chamber and the compression chamer. a

13. In a gas engine, in combination, a combustion chamber, a water jacket there for, an intermediate chamber having a common wall with the said water jacket, a com valve between the compression chamber and the intermediate chamber and plungers working. in the combustionchamber and the compression chamber in alternation.

15. In a gas engine,,in combination, a pair of cylinders each having a bore of two diameters, pistons operating in said cylinders in alternation, each piston having an imperforate surface complementary 1n form to the bore of the corresponding cylinder, an induction port at the inner end of the larger bore of each cylinder,'a pair of independent intermediate chambers each having two port openings which are located, respectively, at the inner end of the larger bore of one cylinder and at the outer end of the'smaller bore of. the other cylinder, and a check valve controlling vthat one of the port openings of each of the said intermediate chambers which is located at the inner endof the larger bore of acylinder.

' 16.- In a vgas engine, in combination, a pair of cylinders each having a bore of two diameters, pistons operating in ,said cylinders in alternation, each -pmton havin an imperforate surface complementary in: orm to the bore of the corresponding cylinder, an induction ort at the inner end of the larger bore 0 eachcylinder,a checkvalve controlling each of said induction ports, a pair of independent intermediatechambers each-havingtw'o port openings which are located,respectively,at the inner-end of wall with the said water jacket, a check the larger'bore 'ofon'ei cylinjde'r and *at the in ages engine, pair,

aieaoaa of cylinders, the bore of each cylinder having an outwardly facing annular shoulder intermediate its ends, pistons reciprocating in alternation one in each cylinder, each piston having an iinperforate surface coinpleinentary in form to the bore of the corresponding cylinder, an induction port located upon the said annular shoulder of each cylinder. check valve controlling the said induction port, and a pair o1 independent intermediate chambers each having two port openings, which are located, respectively, upon the said annular shoulder of one cylinder and at the outer end of the smaller bore of the other cylinder, and a check ialve controlling that one of the port openings of each of the said intermediate chambers which is located upon the said annular shoulder of a cylinder.

18. In a gas engine, in combination, a power cylinder, a pumping cylinder, a chambered casing, passages connecting the chamber of the casing with both of said 19. In a gas engine, in combination, a

pair of upright cylinders each having a bore of two diameters, pistons operating in said cylinders in alternation, each piston being complementary in form to the bore of the corresponding cylinder, a pair of upright tubular casings located between the cylinders, a port connecting the larger bore e bore feet, a y l e co i cr's, a port connect 03231119 above the come spending one of the said valves with the smaller bore oi the cylinder other than the one having its larger bore connected with the bore oi the same casing by one 03'? the first named ports, and a cap reniovably fitting the top of each casing, each of the said valves being removable through the top of the corresponding casing upon removal of the corresponding cap.

20-, In a gas engine} in combination, a pair of: upright cylinders each having a bore of two diameters, pistons operating in said cylinders in alternation, each piston being complementary in form to the here or the corresponding cylinder, a pair of upright tubular casings located bet een the cylin ders, a port connecting the larger bore of each cylinder With the bore of one of said tubular casings at its root, a valve controlling each of said ports, port connecting the bore of each casing above the corresponding one of ihe said valves with the smaller bore of the cylinder other than the one having its larger bore connected with the bore of the same casing by one of the first named ports, a water jacket surrounding the said cylinders and casings, a I'EIHQV'. able cover plate normally closing the top of the Water jacket, and/a cap detachably fit ting the top of each of the said casings be low the said cover plate, each or the said valves being removable through the top of the corresponding casing and top of the Water jacket upon removal or the said cover plate and corresponding cap,

GLEVER M. DE

Witnesses:

Cries. B. Gwen, E. M. liners/nan.

LAUNT Y.

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