US1411343A - Internal-combustion engine - Google Patents

Description

v w; W.,GORE.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED DEC. I. 1921.

1,411,343. PatntedA Ir.4,1922;

UNITED STATES PATENT WARREN v0. eons, or MAD son, WISCONSIN. ASSIGNOR :ro rotten & onson MFG. '00., or MADISON, Wisconsin, A CORPORATION or WISCONSIN.

INTERNAL-COMBUSTION ENGINE.

citizen of the United States, residing at Madison, in the county of Dane, State of Wisconsin, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specificetion.

This invention relates to the art of internal combustion engines, having reference more particularly to engines of the fourcycle type.

As is Well known, nieny internal comhus tion engines are provided with a closed crankcase, Which letter is equipped with a breather to allow the heated air and gases that have passed by the piston to escape from the crank-case and be replaced by cool air drawn in on the up or out strokes of the piston. \Vhere such engines are used indoors, the gases emitted by the breather ere noxi'cus and objectionable, and hence, in engines of this type, and especially those designed for indoor use, it is common practice to provide connection from the crank-case to the intake manifold of the engine through which such noxious gases are conducted to the cylinder instead of being expelled to the atmosphere.

My present invention relates more specifically to an improved device forthus conducting the crank-case gases to the engine cylinder on the suction strokes of the piston; and the purposes served by the specific con-- structionhereinafter described in detail and the advantages flowing therefrom, will he pointed out after the description of the structure itself, which latter is illustretedin two practical forms or embodiments in the accompanying drawing, wherein Fig. 1 is e sectional elevation of those parts of a single cylinder four-cycle engine .Wlllh which my present improvement di rectly cooperates; and

Fig. 2 is an enlarged sectional elevation of a modified structure embodying the same principle.

Referring first to Fig. 1, 5 designates the closed crank-case, 6 the cylinder, 7 the piston, 8 the crank she-ft, 9 the connecting rod, 10 the cylinder-head, 11 the intake valve and 12 the exhaust valve of a single cylinder four-cycle engine. Connected to the intake side of the cylinder head. is an elbow-shaped supply pipe or manifold 13- containing a.

Specification of Letters Patent.

Patented Apr. 4, 1922.

Application filed December 1, 1921. Serial No. 519,098.

butterfly governor valve is. In the top of the crank-case 5 is a breather hole 15, over which is secured a laterally extending breather pipe section 16 formed on its upper side with a valve seat 131' on which is mounted on ordinary check or breather valve 18. v

' Connected in between the manifold 13 end the breather pipe 16 is a tubular connection comprising, in the instance shown, a veporized existing 19 attached to the lower end of the manifold 13, and a breather tube 20, the lower end of which is mounted in-e seat 21 on the breather pipe 16 and surrounding the breather valve '18, and the upper end of which is similarly fitted to a seat 22 formed the veporizerll) is led a' fuel supply ipe 23 which "delivers the oil to an upstanding "at nozzle 24: projecting into the lower'en'd of t e manifold 13; In the vaporizer 19' is also mounted it butterfly choke valve 25 for throttling the air when starting up the englue. 2 i

The breather tube section 20 of this tuhiu lar connection between the crankcase and the intake manifold is formed near its up per end with an ammlerirow of holes 26 constituting air ports for the intake of stmos pheric air for the fuel mixture. Attached at its wide end to the inner surface of the breather tube 20 slightly below the air holes rected into the vaporizer l9, whence they How through the latter and the manifold 13 to the cylinder on each suction stroke of the piston.

On the upper end of the breather tube 20 is preferably applied a short depending conical flange 29which lies opposite and encircles the annular row of air ports 26.

In the construction described, the two inner and outer conical members 27 and 29 perform important functions. The internal conical member 2'? possesses two main functions,'one of which is to prevent the crankcase gases from shootingout through the air ports 26, While the other is to prevent any excess fuel that collects or condenses on the sides of the vaporizer or manifold. from dropping down onto from'which position into the crank-case.

in this way drips downintothe annular,

the breather valve, it might work down Any fuel that collects space at the base of the conical ring 27, from which it is picked up on the succeeding suction strokes of the engine. The hollow conical flange 29 serves to reduce the sharp hissing-noise of the inrushing air, thus act- 1 formed in its lower end and the breather ing as ,asilencer.

F- g. 2 shows amodification embodying the same principle. In this form the vaporizer 19' has an annular row of air inlet ports 26 tube is "formed with a conical upper end 27" that is fitted into the lower end of the vaporizer, its narrow top opening 28 lying slightly above the air ports 26. The outer conical flange 29? is formed on the vaporizer 19', extending downwardly around the air ports 26. It will be manifest that this modification has the same mode of action,

functions, and advantages as the form of the invention shown in Fig. 1, differing from the latter only in a transfer 01"? certain of the elements from the breather tube to the lower ports, said bafile ring serving to deflect the" crank-case gases flowing through said tubular co nection upwardly past'said air ports andinto said intake manifold.

2. In an internal combustion engine, the

combination with a cylinder, crankcase, and

surrounding said air ports. intake manifold, of a tubular connection ber 'tween said crank-case and manifoldformed with lateral air ports, breather valve in the lower portion of said tubular connection, a conical baffle ring within said tubular connection and disposed opposite said air ports,

said baflie ring serving to deflect the crankcase gases flowing through said tubular connection upwardly past said air ports and into said intake manifold, and a, dependingexternal flange on said tubular connection surrounding said air ports. a 3. In an internal combustion engine, the

combination with a cylinder, crank-case, and

intake manifold, of. a vaporizer connected to the lower end of said intake manifold, a

breather tube connected between the lower end of said vaporizer and said crankcase and formed with lateral airports near its upper end, a breather valve in the lower portion of baflle ring secured at its .lowe'r'wide end to the inner surface of said breather tube below said breather tube, and a conical said air ports and disposed opposite the latter, said baiil'e ring serving to deflect the crank-case gases flowing through said breather tube'upwardlypast said air ports and into said vaporizer and also to retain excess fuel collecting within the vaporizer.

4. In an internal combustion engine, the combination with a cylinder, crankcase, and intake manifold, of a vaporizer connected to the lower end of said manifold, a breather tube connected between said. vaporizer and said crank-case and itormediwith lateral air ports near its upper end, a breather valve in the lower portion of said breather tube, a conical bafiie ring secured'at its lower'wide end to the inner surface of said breather tube below said air ports and lying opposite the latter, and an external depending conical flange on the upper end of said breather tube W Benn w. eons.

Images