Патент USA US2407178код для вставки
. Sept. 3, 1946. ~ ` ' D. G. Roos _2,407,178 cnANKcAsE VENTILATION SYSTEM Ann APPARATUS Filed oet’. 15', 1945 2 sheets-sheet '1f __ D. G. Roos cRANKcAsE vENT1LAT1oN"~VsY-sTEM AND Filed om.> 15, i943 2,407,178 APPARATUS .. ^ > è `sheets-S113“ 2 ,46" ì IN VEN TOR. ' ßelmar (i R00: Patented Sept. 3, 1‘946 2,407,178 UNITEDv STATES 4PATENT OFFICE CRANKCASE‘ VENTILATION SYSTEM AND i APPARATUS i ‘ Delmar G. Roos, Toledo, Ohio, assignor to Willys Overland Motors, Inc.,¿To_ledo, Ohio, a corpo ration of Delaware ‘Application October 15, 1943, Serial No. 4506,453 3 Claims. (C1. 123%11‘9) l 2 'I'his invention relates to a system and appara tus‘for circulating a current of air through a Figurei 1 is an end elevational view of an inter nal combustion engine, parts being shown in sec tion illustrating the system and apparatus of my crankcase of an‘internal combustion engine espe cially for the purpose of’removing vapors and gases from the crankcase and valve _mechanism chamber of the engine'.A l i invention; 1 ` `l ` < i Figure 2 is a top plan view of the engine and associated apparatus shown in Figure 1; ï The invention ccmprehends a system and ap paratus for ‘continuously‘removing vapors from ‘ Figure 3 is a view taken substantially‘on the line 3.-’-3 of Figure 2 `with the air cleaning ar the crankcase `during engine operation whereby rangement shown partially in section; oil contamination- by dilution as well as by sludge 10 "Figure 4 is an enlargeddetailed sectional view formation due to oxidation is materially reduced. taken substantially on the line,- d--II of Figure l; - One of `the principal objectsof the invention Figure ‘5 is a ‘detailed sectional View taken sub is the provision of means-‘interealated with the air cleaner and conduit for conveying air to the stantially on the line 5-5 of Figure 2. , While I have illustrated a form of my inven carburetor as to divert a portion of the air -from 15 tion as‘incorporated in a multi cylinder engine the air cleaner through‘the crankcase and valve of alcharacter usable in an automotive vehicle, push rod chamber,` so that clean air flows through it is to be understood that I contemplate the the crankcase and valve push rod chamber. utilization of my invention with any type of en Another object of the invention `resides in the gine wherein the same may be found to have provision of a systemand- apparatus for circu 20 utility. lating acurrent of clean air` through the crank Referring to the drawings in detail, I have il case and whereby. the air passing through' the lustrated a` conventional type of internal com crankcase‘and valve push -rod compartment- is bustion engine inclusive of a erankcase I0 mount discharged into the intake manifold ofthe inter ed up'on suitable support I I one or more cylinders nal combustion engine.` c . I " *ï ‘ » I2, each cylinder accommodating- areciprocating ~ Another object of the invention is the provision piston I3 connected by means of a connecting rod of a crankcase Ventilating system whereby a` por I4 to a crankshaft I5, the latter being journaled for rotation in suitable bearings carried bythe crankcase Il);` The lower portion of the crank tionjof the clean air which would otherwise nor mallyapass `through thefcarbu'reto'r is diverted throughy ‘the engine crankcase and `incorporating case is closed by means of an oil pan or reservoir means for varying the rate of flow of'air through I6. 'I'he upper portion of the crankcase is formed with a valve push rod chamber I1, the valve push rodsï|8 being arranged-in bearings I9 and are actuated by suitable camshaft 2U. The chamber the crankcase dependent upon the speed ofthe engine. ` ^ ` Another object of the invention is thev provision of‘means for circulating a current of clean air w ,vi -I'I is provided in its side wall with opening 2| throughthe crankcase of an internal combustion which is covered by means of a closure or fitting engine which arrangement may be adapted to ex l22 held in place by a bolt 23. The valve push rod isting engine types without the necessity of mate chamber I'I is in communication with the crank rial alterations being made in the engine struc ture. v ï ' ' Still a further object of the invention is the Aprovision of a system of circulating air through a crankcaseì-«whereby the circulating air and en trained vapors" are discharged into the intake manifold of the engine. VÍ Further objects and advantages are within the scope of this invention such as relate to the ar case by means of a passageway 25. 40 Secured to the engine block is an intake mani fold 21 which is connected to a fuel and air mix ing device or carburetor 28 for supplying a com bustible mixture to the engine, the latter being provided with a conventional exhaust manifold (not shown). Connected to the carburetor 28 is an air horn 30 which communicates with an air cleaner 3| by means of a duct or conduit 32 se rangementoperation and function of the related cured to the air horn by means of a clamp 33, elements‘ofV the structure, to various details of the other end of the tube 32 being connected to construction and to combinations of parts, ele 50 «the air cleaner-'by means of a flexible conduit or Aments per se; and to economies of manufacture and numerous other features as will be apparent >from a consideration of the'specification `and . l awings -of a form of the invention, which may .be preferred, in. which: 1 ‘ tube 34. The air cleaner 3l is inclusive of a sub stantially cylindrical chamber which is closed at its lower end by means of a cup-like member 31 which is adapted to containa small quantity of ' liquid 38 as for example, oil. or 'the like, to trap 2,407,178 3 particles removed from the air entering the cleaner. The member 31 is retained in position by clamping means 36. The upper portion of the cleaner is provided with a series of louvered in lets 33 to facilitate the ingress of air into the interior of the cleaner. The air cleaner struc ture is provided with projections’40 which engage brackets 4l secured to the dash board 42 or other suitable portion of the vehicle, the projections 40 being secured to brackets 4I by means of Wing nuts 43 or other suitable retaining means. Vertically arranged With respect to the engine block and projecting into th'e crankcase I6 is an oil ñller tube 45 preferably‘fabricatedçof sheet metal tubing. The upper portionof the tube 45 is provided with a ñtting 46 of flared or frusto conical configuration to facilitate'the'introduc 4 The operation of the arrangement of my inven tion is as follows: During operation of the internal combustion engine, air is admitted through the air cleaner 3 I, conduit 32, air horn 36 into the car buretor 26 where thev air is mixed With combustible fuel, the mixture passing through the intake man ifold .21 into the engine cylinders. Under the influence of sub-atmospheric or reducedpressure existing in the intake manifold during engine operation, a portion of the air entering the cleaner 3| is l diverted through the branch passageway nor Vduct formed by tubes 5I, 52 and 53 into the oil filler tube 45, the air passing into the crank 4case ||| through‘passageway 25, valve push rod compartment; |-1,"thence- through fitting 56, tube 51, lfitting 58, member 60 and sleeve 62 into the inta-ke manifold ofthe engine and below the car buretor 28. When the engine is operating at com tion of lubricant or oil into the engine crankcase. paratively slow speed, that is, when the sub-at The fitting 46 is tightly closed by means of acap` 41 through the medium of a sealing gasket 44 20 mospheric pressure in the intake manifold is only slightly less than atmospheric pressure, theA valve urged into sealing position under'. the influence member 66 is inthe position showninI Figure 4, of a spring '50, as particularly‘shown in Figure ‘5. the air circulatingthrough theacrankcase'pass Secured to the cap 41 isa -rod 46 which extends ing from chamber 61 through the openin'gslßdand downwardly through the tube 45 into theoil pan I6 and provides a means for. measuring or'deter 25 past the valve seat 12 into the intakefmanifold as well as through the metered passagewayôß. When mining the'oil level in the oil pan i6. rJî‘he cap 41 the engine .speed increases., .the ypressure in the is provided exteriorly with a member 48a`>having intake .manifoldis further ‘reducedtcreating .a upturned ear portions 49 ‘affordingfa manipulat higher vacuum therein. The. air pressure> in the ing means for removing the oil ñller `cap! 41, when it4 becomes necessary lto introduce lubricant. into so crankcase and valve .chamberl 65.bein'g:substantiallfy greater than> thepressure in fthe intake the filler tube. It is `desirable that the entrance manifold, overcomes the ypressure of the spring to the ñller tube be' tightly closed in order that `all 10 and causes the valve 66 to move ina leftrhand air taken into the crankcase for ventilatlon'pur» direction until the tapered‘seat 12 engages the poses be admitted through’the ’air cleaner 3 l . The conduit `32 is provided with a branch pas- y. sageway 5| vand the ñaredîñtting 46 of the oil filler system is provided with a laterallybextending tube or passageway 52 which'are joined together abutment 13, so that the »only air ' passageway through the valve is by ‘means of themetered opening or pasasge 68. With the valve in `closed position, the rate of `flow vof ‘air through Athe pas sage 68 may be comparatively high with' increased by means of a flexible’tube 53’ heldin place by clamps 54. The tubes or passageways 5I, 52 and 40 engine speed, but the kamount 'of air :circulating through the crankcase will remain within prac 53 form an air passage or ductv from the'conduit tical limits, although variable,‘as itis dependent 32 to the oil ñller tube 45 thus providing ameans upon the‘engine'speed` and the position-'of `the for diverting a portion of the> air taken in through valve member 66. In thispmanner'the circula the air cleaner 3| into the oil filler tube 45> thence tion of air through the crankcase isy controlled or into the crankcase I5. regulated so that at high enginezspeedsithe cir The fitting 22` closing the opening `2|! in the culation 'of air is not'increased to a'point which wall of the valve push rod chamberisprovided would carry out oil from the crankcase. It should with an L-shaped fitting 56 to which connected 'also be noted that all of the air circulating a tube 51 leading to another L-shaped f1tting58 which has'a threaded tenon portion 56 engaging 50 through the crankcase together with the fumes andother vaporsentrainedby theainare dis in a threaded opening in a member 66. The-mem charged into theuintakemanifold and into the ber 60 is formed with atenon .6| which ,engages engine, being subsequently discharged through in an interior threaded portionina sleeve 62, the engine >exhaust » system. vthe latter having a `portion 63 `engaging in a .It is apparentfthat, within therscope of the in threaded opening in a wall of the intake -manifold vention, modifications and ydifferent arrange 21. The sleeve 62 is'formed interiorly withvalve ments may be made other'than is herein .dis chamber 65 in which is positioned .a‘reciprocable closed, and the present disclosure is illustrative valve or airflow regulating member 66. The valve merely, the invention comprehending `all varia member 66 is provided with a chamberl 61 which communicates with the intake manifold through a 60 tions thereof. What I claim is: passageway or metered opening 68. The walls of l. In combination, -an. arrangement for venti the chamber 61 are formed with transversely lating the crankcase of an internal combustion arranged passageways 69 which open into the engine havingv an intake manifold anda plural chamber 65. The valve'member 66 is normally ity of cylinders in line and an adjacent valve urged into engagement with the endA of thetenon chamber, a carburetor, an oil> filler tube extend 6| underthe influence of 4an expansive coil spring ing into said crankcase substantially below'the 16. The valve member 66 is formed with a frusto lower end and opposite the valve chamber vand conical wall portion 12 which is adapted toseat projecting above the engine; an air cleaner, an against a shoulder Aor abutment 13 formed in the interior passageway in the tenon portion 63 of sleeve 62. ‘When the valve member 66 moves in a left-hand >direction asviewed in Figure‘l, the vtapered seat 12 engages the abutment 13 so‘that mthereafter air may only circulate through the metered passageway 68; air conduit connectedto said carbureton'means connecting said air cleaner and'said'air -conduit, a closure for sealing the upper end of said filler tube, means establishing communication between >theupperportion of said ñllerltube and sai‘d'air conduit, and means includingfa connectionbe 2,407,178 tween the valve chamber and the intake mani fold whereby the reduced pressure in said intake the valve chamber and intake manifold, said ` valve means being dependent for actuation upon 2. In combination, an arrangement for venti lating the crankcase of an internal combustion the amplitude of subatmospheric pressure in the intake manifold for regulating the amount of air flowing through the crankcase. 3. In combination, an internal combustion en gine having a series of vertical cylinders ar engine having an intake manifold and a plural- ‘ ranged in a line, and a crank case below the ity of cylinders in line and an adjacent valve chamber, a carburetor, an oil iiller tube extend cylinders, a valve chamber laterally disposed to the cylinders, a carburetor having an intake and an outlet, an oil ñller tube projecting from above the engine and extending into the crankcase be low the valve chamber and on the opposite side of the cylinders from the said chamber, an air cleaner on the same side of the engine as the filler tube, means connecting the carburetor’sV in take with said air cleaner, an air conduit con manifold sets up a flow of ñltered air from said air cleaner through said iiller tube and crank case in a transverse direction. >ing into said crankcase, substantially below the lower end and opposite the valve chamber and projecting above the engine; an air cleaner, an air conduit connected to said carburetor, meansY connecting said air cleaner and-said air conduit, a closurevfor sealing the upper end of said ñllerr tube, means establishing communication between ' the upper portion of said filler tube and said air . conduit, means including a connection between> the valve chamber and the intake manifold'v whereby the reduced pressure in said intake man-` ' ifold sets up a ñow of filtered air from said air cleaner through said filler tube and crankcase, and spring loaded valve means positioned ex teriorly of the engine in the connection between 25 nected to said ñller tube, means connecting the air cleaner and said air conduit, a closure for sealing the upper end of the ñller tube, an intake manifold connected to the carburetor’s outlet, and valve means connecting the valve chamber and the intake manifold. DELMAR G. ROOS.