US1683039A

US1683039A - Robert k

Info

Publication number: US1683039A
Authority: US
Publication date: 1928-09-04
Anticipated expiration: 1945-09-04

Description

sept. 4, 1928. 1,888,039

R. K. JACK ENGINE Filed June 25, 1926 Patentecl Sept. el, 1928.

UNITED s'rArl-:s

ROBERT PATENT OFFICE.

.'K. JACYMOF LANSING, IVIICHIGAN, ASSIGNOR T0 GENERAL MOTORS CORPORA- TION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE.

ENGINE.

Application filed June 25, 1926.

This invention relates to engines particularly of the internal combustion type having crankcases provided with means for passing an air stream therethrough for effect-ing evaporation of diluents from the crankcase oil and incidentally aslight cooling' of the engine. In the operation of engines so equipped it has been found that the stream of air in its passage through the crank case entrains with it fine particles of oil. VVhere the crankcase vapors are led to the carburetor to form the combustible"1nixture, these oil particles upon condensation collect upon the needle valve and other parts with which they come in con- 'I tact and are likely to clog` the fine passages and to some extent gum up moving parts. To obviate this difliculty, I employ a separator to remove particles of oil from the vapors issuing from the crankcase. While this separator may be positioned wherever desired in the passage leading from the crankcase to the carburetor, I have preferred to locate it adjacent the crankcase, preferably upon the cover for the valve chamber which, in present day engines, sin direct communication with the crankcase. I have'also preferably so clesigned my separator as to provide for the re-` turn of oil part-icles to the crankcase.

Referrng to the drawings:

Figure 1 is a side elevation of `an automobile engine with my device applied thereto.

F igure 2 is a partial Vertical section through the engine, the Separator being shown in section on the line 2-2 of Figure 3 :but in reversed relation to the engine to better illustrate the construction.

Figure 3 is a horzontal section through the cleaner and a portion of the valve cover.

The reference character 2 indicates a conventional type of internal combust-ion engine having a crankcase 4. Vhile this invention i p is applicable to any of the various types of engines I have chosen to illu-strate an engine of the L-head type in which the valve compartment 6 is at one side of the cylinders 87 this compartment housing the valve stems and tappets in the usual manner and having communication with the crankcase through the usual openings 7 through which the valve tappet guides pass. The engine is provided with a conventional carburetor 10 drawing part of its air supply from the crankcase through conduit 12, oil Separator 14, and valve compartment 6, and the remainder through con- Serial No. 118,513.

studs 22. One of these covers is apertured at` 24 and in the opening is fitted the tangentially arranged intake passage 28 of the oil separator. This separator is preferably in .the form of a cylinder 30 having

end closures

31 and 32 and provided with a substantially centrally arranged stand-pipe 33 which is in communication with the conduit 12 leading to the carburetor. This Stand-pipe is provided with an opening spaced from the bottom closu1'e`32 of the Separator and establishing communication between the interior of the Separator and the stand-pipe.

Upon the interior of the valve cover 20 I have provided baflie plate 88, preferably louvered as at40, this battle serving to effect a partial separation of 011 part-icles from the lssuing air stream.

In the operation of the device clean air t supplied to the crankcase'through the air Cleaner 18 and conduit 16 mingles with `the oil and oil vapors in the crankcas'e and' effects evaporation of diluents. The resulting mixture passes into valve compartment 'through opening 7 and thence through louvers40 into the tangentially arranged passage 28 leading to the oil Separator. T'he effect of the tangential arrangement of passage 28 is to impart to the entering air stream a whirling motion which results in the projeetion of particles of oil against the outer walls of the Separator on which they collect and-trickle down upon the bottom 32 of the Separator and eventually find their way through passage 28 to the valve chamber and crankcase. The portion 30 of the spiral passage surrounding the stand-pipe 33 forms an effective trap for the collection of oil particles. This return flow of oil usually takes place when the engine comes to rest. The location of the opening 34 in the stand-pipe above the bottom 32 of the Separator prevents the passage of the oollected oil into the conduit 12 leading to the earburetor. Thezpurified air passes through the opening 34 into the con duit 12 Where it is joined by air entering through i passage 15, finally entering the carburetor to form thecon-ibustible mixtnre.

The mounting of the oil Separator on the valve compartment is of special advantage. In the first place the valve compartment is sulficiently far removed from the crankoase so that the large` particles of oil do not reach the ontlet. In the second place7 the valve cover isusnally in the form of a light metal stamping and 'it is a very easy matter to se- Cure upon it on one.. side the baflle 88 `andon the otherside the simple form of oil separaf. tor which 'is also preferabl formed'` of Sheet metal dis'closed in this application. Thus any niodifioation of'the'castings constituting o the engine is avoided and a satisfactory device isjsecured atfi'minimum expense. i

I elaim; p i i I 1. An: internal f combustion engine having a: carbnretor and a crankCaSe, said crankcase having an air admission opening, a valve Chamber communication With the Crankcase; ineans'for connection said valve cham-V ber Withthe carbnretor to suppl air to the latter,'andan oil Separator interposed in said meansf'an'decommunicating with said valve. compartment for recervingair therefrom and returni'ng oil thereto.

:2; ,An internal combustion engine having` aiearburetor, crankcase, and cylinders, a valve compartrnent arranged ad] acent the cylinders and' in 'commun'cation With the crankoase, a

cover for said valve compartment,` a conduit leading fromsaid compartment to the carbuf retor'and an oil Separator interposed between saidcondu-itland coverand mounted on ,the

2,f saidiseparator being provided wth a tan gentially arranged inlet to vgive a Whirlingv motion tozthelenteringair stream tovseparate oil' pax'tioiles` .therefronin` i o 4.1 An internalV combustion engine having;

5. Any internal combustion engine having a.` carburetor and aV cranleaseprovided With an.

air inlet opening, a valve Chamber in communication .With the crankcase andJ provided. With a cover, a'substantiallyV cylindrical oil Separator mounted on said cover andl pro-V`` vided with a vtangentiall arra-ngedair inletz communicating, With the valve Chamber andV designed to impart a Whirling motion to they`` entering air stream, a stand-pipe arranged Within said oil separatorand having a dis' charge orifice spaeed above the .bottom of the Separator Whereby` oilv particles separated from the air stream collect in thebottom of the Separator and are returned v'to the valve colnpartment, and a conduit conneeting said stand-p1pe With the carburetor.

6. In the combination as definedin olaim 5, and a bafii'e in the valve Chamber extending 'over said air inlet.

7 Aninternal combustlon engine having. a erankcase, means, for admrttlng air to the crank'case, a-valve Chamber in communication With.V the cr'ankcase, lsaid 'chamberbeing provided'with an airroutlet, means for ap; plying suction to said.` Outlet to Withdraw vapors from the crankoase, andfan olvseparator at said Outlet for separating oilV` particles from the dischargingair 'streamvzand returning themv to the valve Chamber.

8. In the combination asidefinedin` claim 7 ,v said Chamber beingvprovidedfiwithz a removable cover and said Separator. being mountedf on said cover. g

In testimony `whereof :I iafiifx; my'- signature.

ROBERTK; JACK;