US1724599A - Internal-combustion engine - Google Patents

Description

Aug. 13, 929. P, KALB 1,724,599

INTERNAL COMBUSTION ENGINE Filed May 16, 1927 2 Sheets-Sheet 1 Law/5 P/QLB r Tune Aug. 13, 1929. P. KALB 1, 9

INTERNAL COMBUSTION ENGINE Filed May 16, 1927 2 Sheets-Sheet 2 Ch Yuma Patented Aug. 13', 1929.

UNITED STATES PATENT OFFICE.

LEWIS P. KAI-B, OF DETROIT, MICHIGAN, ASSIGNOR TO CONTINENTAL MOTORS COR- PORATION, OF DETROIT, MICHIGAN, A. CORPORATION OF VIRGINIA.

INTERNAL-COMBUSTION ENGINE.

Application filed May 16,

This invention relates to internal combustion engines and refers more particularly to means for cleaning air supplied to the engine cylinders. A further object of the invention is to provide means for ventilating the crank case and to relieve back pressure in the crank case. The invention also provides a simply constructed device capable of manufacture in quantity production at in relatively low cost for efiiciently carrying out the above objects.

Other objects reside in the novel combination and arrangement of parts more particularly hereinafter described.

Referring to the drawings inwhich like reference characters represent correspondingi parts,

ig. 1 is a side elevation of the engine showing the air cleaner with portions thereof broken away to show the ventilator for the crank case,

Fig. 2 is an elevation view of the front of the engine with a portion thereof in section through the air cleaner and ventilator Fig. 3 is a side elevation view of a portion of the air cleaner with portions thereof broken away to show the ventilator baf-, fle and Fig. 4 is a sectional view along 4-4 of Fig. 3. I

In the drawings reference character A represents the engine having the usual pistons B, valves C, cooling fan D, and exhaust and intake manifolds E and F respectively all of which parts may in general be of the well known construction.

The crank case 10 communicates with the valve chamber 11 the latter having a side opening 12 closed by a cover assembly comprising a front cover 13 and a rear cover 14. The cover assembly is held in position by a series of securing members 15.

The front cover 13 is provided with louvres 16 affording entrance of air from the atmosphere into the cover chamber 17, the direction of air entering the louvres being changed as indicated by the arrows thus serving to clean the air, the heavier for- 1927. Serial No. 191,649.

eign particles continuing their directional 5o flow rearwardly of the engine.

The rear cover 14 is provided with one or more holes 18 preferably close to the front end of the cover serving to establish a certaln amount of communication between crank case 10 and valve chamber 11 on the one hand and cover chamber 17 on the other. In order to prevent, as far as possible, oily vapor from passingfrom the crankcase to the cover chamber, bafiles 19 and 20 are provided, the former restricting the communication between the crank case 10 and valve chamber 11 and the latter being associated with the holes 18.- Air from the cover chamber 17 passes to the carburetor G by reason of the conduit or air elbow H preferably connected to the cover chamber relatively near one end thereof.

Air currents from the motor fan D pass through the louvers 16, into the cover chamber and thence to the carburetor by wa of conduit H, the suction in the intake pre erably regulating the amount of air supplied. A slight vacuum is set up in the cover v chamber which draws the air through the louvers and also draws a slight amount of air from the crankcase through the openings 18. The primary purpose of this is to relieve any back pressure which may be set up in the crankcase and incidentally to insure a circulation of oily vapor from the crankcase into the valve chamber. Thus a combined air cleaner and crank case ventilator is provided, the valve mechanism being lubricated by the oily vapor currents set up in the direction toward the cover chamber from the crank case. 'One important feature of the invention resides in proviling one or more bafiie devices between the c ver chamber 17 and the crank case .10.

What I claim as my invention is:

1. An internal combustion engine comprising in combination an engine combustible mixture supplying device, a crankcase, a valve chamber communicating with said crankcase, said valve chamber having an opening extending longitudinally of the side of the engine, a cover assembly including an outer member provided with louvers opening rearwardly of the engine and an inner member substantiall closing said valve chamber opening, sai inner and outer mom- 5 bers forming a cover chamber, means forming a restricted communication between the cover chamber and crankcase for ventilating the latter, and means for supplying air from said cover chamber to the said mixture supplying device;

2. An internal combustion engine compris ing in combination an engine combustible mixture supplying device, a crankcase, a valve chamber communicating with said crankcase, said valve chamber having an opening extending longitudinally of the side of the engine, a cover assembly including an outer member provided with louvers opening rearwardly of the engine and an inner member substantially closing said valve chamber opening, said inner and outer members forming a cover chamber, said inner member provided with an opening, a baflle restricting communication between the cover 2 chamber and valve chamber, and means for supplying air from said cover chamber to the said mixture supplying device.

' 3. An internal combustion engine compris in in combination an engine combustible mixture supplying device, a crankcase, a valve chamber communicating with said crankcase, said valve chamber having an opening extending longitudinall of the side of the engine, a cover assembly including an outer member provided with louvers opening rearwardly of the engine and an inner member substantially closing said valve chamber opening, said inner and outer members forming a cover chamber, said inner member 49 provided with an opening, a balfie restrict- 1ng communication between the cover chamber and valve chamber, a second baflie restricting communication between the crankcase and valve chamber, and means for supplying air from said cover chamber to sm mixture su plying device.

4. An interna combustion engine comprising in combination with an engine crankcase and carburetor, a valve chamber means 50 including a cover assembly operatively associated with the valve chamber and crankcase and adapted to ventilate the crankcase, said means including a member formed with louvers roviding inertia air cleaning, and

IS! a conduit for conducting the cleaned air to the carburetor.

5. An internal combustion engine comprisc ing in combination an, engine combustible mixture supplying device, a crankcase, a

valve chamber communicating with said crankcase, said valve chamber having an opening extending longitudinally of the side 0 the engine, a cover assembly including an outer member provided with louvers opening rearwardly of the engine and an inner member substantially closing said valve chamber opening, said inner and outer members forming a cover chamber, means located near one end of the cover assembly forming a restricted communication between the cover chamber and crankcase for ventilating the latter, and means connecting the'cover assembly near the other end thereof for supplying air from said cover chamber to said mixture supplying device.

6. An internal combustion engine comprising in combination with an engine crankcase and carburetor, means including a cover chamber assembly operativel associated with the crankcase and adapte to ventilate the crankcase, said means including a member formed with louvers spaced longitudinally along the engine for the passage of air directly from the atmosphere to the cover chamber, and a conduit conducting the air from the cover chamber to the carburetor.

7. In an internal combustion engine the combination with a crankcase and carburetor, of a valve chamber having an opening along the side of the engine, a cover chamber substantitally closing the valve chamber opening and restrictedly communicating with the valve chamber and crankcase to substantially prevent crankcase and valve chamber oily particles from being conducted to the cover chamber, and a conduit between the cover chamber and carburetor.

8. In an internal combustion en ine the combination with a crankcase an carburetor, of a valve chamber having an opening along the side of the engine, a cover chamber substantially closing the valve chamber opening and restrictedly communicating with the valve chamber and crankcase to substantially prevent crankcase and valve chamber oily-particles from being conducted to the cover chamber, a conduit between the cover chamber and carburetor, and means conducting air directly from the atmosphere to the cover chamber.

9. In an internal combustion engine the combination with a crankcase and carburetor, of a valve chamber, a second chamber connected with the carburetor intake whereby a suction is induced in the second chamber, said valve chamber communicating with the crank case, means placing the valve chamber in communication with the second chamber to relieve crankcase back pressure and to induce a circulation of oil vapor from the crankcase to the valve c amber,

said means substantially preventing the crankcase and valve chamber oily particles from passing into the second chamber.

10. In an internal combustion engine the combination with a crankcase and carburotor, of a valve chamber, a second chamber connected with the carburetor intake whereby a suction is induced in the second chamber, said valve chamber communicating with the crank case, means placin the valve chamber in communication wit the second chamber to relieve crankcase back pressure and induce a circulation of oil va or from the crankcase to'the valve 0 am er, said means substantially preventing the crankcase and valve chamber oily particles from passing into the second chamber, and means sup lying air directly from the atmosphere to t e secondchamber.

In witness whereof, I hereunto subscribe my name this 12th day of May, A. D. 1927.

LEWIS P. KALB.

Images