Aug. 27, 1935. c. 5. BROWN 7 MULTICYLINDER' BLOCK FOR AIR COOLED ENGINES Filed April 4, 1954 2 Sheets$heet 1 ZVENTOR. M%/
ATTORNEYS Aug. 27, 1935.
c. 5. BROWN 2,012,740
MULTICYLINDER BLOCK FOR AIR COOLED ENGINES Filed April 4, 1934 2 Sheets-Sheet 2 231F012. B %//%/%W/ ATTORNEYS.
Patented Aug. 27, 1935 30 Other objects appear throughout the s pecificaof metal between the cylinder bores, curve inward r v ,012,746 v v MULTICYLINDERBLOCK. FOR AIR COOLED e J' ENGI NES .;,QI., '(lharle's S; Brown, Syracusa- 1 Application April 4, 1934, Serial No. 718,973 I a i r r newal? l I This invention relates tom'ulti-cylinder blocks sagabr-passages; 5extending lengthwiseof the for air cooled engines, and has forits'object a I bores b'etween the same, said passage preferably cylinder block 'havinga passage, or passagesfln being open at itsupper and lower ends for the the portion thereof between the cylinde'r bores passageof air; andbeing so located as toallow so arranged as to compensate for distortion of cxpansion and contraction of the mass of.metal" J5 the mass of metal between the bores, and difierbetween the "bores without causing :misalinee ences in expansion throughout the whole block, nt' t i y i bores; a d o p for and thus avoid misalinements and undue distor' fi i expan throughout the Whole tion of the bores as the cylinder block heats, and block and the liners; I The passage- 1 1 at 1 when casting. I i I 1 upper end, into the surrounding air into space 101 0 It further has for its object, an arrangement between the Cy dSrO h o g t e ho of heat radiating fins, particularlyalongthe sides in the head if the heads areaf sing e block, of the block and themass' of metal between the contradistinction'toindividualheadsQ-"I'l'le pas bores, to quickly conduct theheat to the cooling sage communicates, at its lower end; with; the a 1; air current, and an upright passage between the urrounding air 1 througha transverse P 5 5 bores, which passage is preferably 'open at its I 1 l'Jassagea i in the block. Thepassage ends to facilitate the cooling, and to prevent p fm V or i' a d j undue distortion of the mass of metal between Pr fe bly;they de b r s 2 a -p dthe bores. a s with 'sleeveliners 6, usually-of a ferrous 'metal" 0 It further has for its object, a multi-cylindera'SiCaSt iron; 1 Whibh'isj b dd d in: t air cooled block in which the cylinder bores are body du g" e oi e' i y Q dY' 'j provided with sleeve liners embedded therein to usually u m, al i form a'good mechanical and ther'mal'union bey aJ having 'g fl edt ndl t V-i tweenthe liners and the body of the block, to-' than ironfor' steel-i" The siderort sl f t gether with a passage between the bores in-which flanges, on? the sides off-the block and pr j n g5 portions of the peripheries of adjacent liners are m he-m ss r po o of the-body which X- exposed, the body of the block and, it h at tends betweenthe bores, are continuous of the radiating flanges being of a metal having a d portions of the flang s, that is, e portions greater heat conductivity than that of the sleeve, around the ends of the block. The outer faces or liner. of the side portions 4 of the flanges, and the mass tion. slightly out of a straight line. r
The invention consists in the novel features n O der to fo m a 5 0d mechanical and therand in the combinations and constructions heremal, or heat conducting union between the sleeve 7 inafter set forth and claimed. liners 6 and the body, the liners are provided with 35 In describing this invention, reference is had peripheral flanges 1 which are embedded in the to the accompanying drawings in which like oharbody I, and portions 8 of these liners with their acters designate corresponding parts in all the flanges are exposed in the air passage 5. This views. air passage 5 is usually located between the cyl- Figure 1 is a plan view of a multi-cylinder air inder bores where they are nearest together. 40 v cooled block embodying my invention. As seen in Figures 1 and 4, these sleeves or Figure 2 is a sectional view on line 2-2, Figliners 6 are provided with flanges 9 at their'upure 1. per or head ends which lap thehead ends of the Figure 3 is a sectional view on line 3-3, Figblock around the bores, and are of suflicient width ure 2. to'be provided with holes in for receiving the 45 Figures 4 and 5 are respectively a plan View, screws, or bolts, or other members which secure and an elevation, of one of the sleeveliners. the heads of the cylinder to the blocks, and wide Figure 6 is a plan view, similar to Figure 4, enough for seats for gaskets, the block being of a slightly modified form of liner. formed with holes alined with the holes ID for Figure 7 is a fragmentary, sectional view taken receiving the bolts. As shown'in Figures land I on line 'I--1, Figurefi. 4, the flanges 9 are rectangular'in general form. v This multi-cylinder block for air cooled en- However, as seen in Figures 6 and 7, the flanges gines comprises generally, a body I formed with H, corresponding to the flanges 9, may be annu- I aplurality of cylinder bores}, circumferentially lar and embedded in the body I flush with the extending heat radiating flanges 3, and a pas-. upper face of the'body so that the screws, or bolts,
which secure the heads to thebody, thread directlyv into the head, and not through the flange. In forming this cylinder block, the sleeves, or liners, are properly set in the mold, and the body of aluminum alloy, or other metal having relatively high heat conductivity, cast around the sleeve. The block is also for'med with a suitable base flange l2 by which it is mounted upon the crank case ofthe engine. i i .1 f
One or more of these multi-oylinder blocksm'ay be usedin a singleengine, either V type, or inline type, and a cooling air current is blown in a direction lengthwise of the blocks, or the flangesf3,
and directed in any suitable manner topass' crosswise thereof between the blocks. The large mass of metal between the cyl nder walls absorbs heat from the cylinder bore's and equalizes or tends to equalize the: absorption of f i of the portions of the flanges around the ends of V the block, the body being of a metal having a the heat from portions of the walls between the cylinder bores with the remaining portions'of the walls of the cylinders, which are more. inthedi; rect path of the air current. The: ventilating pa sage 5 through this intermediate mass-of metal between the cylinder bores. tends toequalize the cooling. of the intermediate mass; between the cylinderboreslwith theeooling of the: outer sides. f'the mass exposed more directlyto the cooling. air current, or, tends to avoid: localizing of the heat in the p rtion of themassbetweenthebores. This cylinder,blocku.is,.comperable in. costgof manufacture a multiwoylinder block for. water c le engines and owing o its construction, makes it'p ss1b1etobring thecost ofan efiicient, air cooled engine: to'that of a water. cooledengineb What; claim is; .& 1, .Am ul i-ieylinder. block for, air cooledengines p i ing abody formed with a lurality 0! cylincler bores, heat radiating flanges encircling the body withthe portions; thereof; on the sides of the, block continuous'jacross the portion of the;
b y between the bores Land; with a passage. ex
- endin enethwisenotthe bores. in the portion.
where thebores are closest togethen the. bores. be-i n: provided with sleeveliners; embedded in the body, said, liners beinglexposedyin said passage.
- 2-, A ,multioylinder'block forair cooled engines comprising a body formed with a plurality of cylinder bores, heat radiating flanges encircling the body with the portions thereof on the sides of the block continuous across the portion of the body between the bores, and with a passage exy .3. A multi-cylinder engine block comprising a' b'ody formed with a plurality of cylinder bores, sleevelliners in the bores and having peripheral projections embedded in the body, the body having heatradiating flanges extending around the body and the portions of the flanges on the sides oil the v.hloclebetween the bores being continuous reater heat conductivity than the liners, the portion otithe body between the bores and-the liners. being formed with a passage extending lengthwise; l of the bores in which passage the contiguous pore-,5 tien ,oij the liner and projections are exposed, wherebylocalizationoi heat in the portion or the.
blookhetween the liners is avoided.
7 4.;A multi-cylinderfengine block comprising a,
bod, formed :With a plurality of cylinder bores, sleeve liners in the bores and having peripheral projections embedded' in the body, the body having heat radiating flanges; extending around vthe body, and theportions of the flanges on thesidesv of ,theblock between theobores being continuous.
of theportions of the flanges aroundtheends of the block, the body being of a metal, having a greater heat conductivity than the -1iners, th e portion of. the body between the bores and the liners being formed with a passage extending lengthwise'ofthe. bores, portions of the sleeve liners being expgs ed in said passage, whereby naked portions of-the, linersare'exposed in said passage and localiz ng of the heatin the mass between hence distortion of the liners the. liners, and avoided, in
C ARLES s. BROWN.
CERTIFICATE OF CQRREiI'iiQN.
Paten'i No. 2,012,740. August 27, 1935.
CHARLES 3. BROWN.
it is hereby certified that error appears in the printed specification of the a sove numbered patent requiring correction as follows: iage 2., first column, after iine 2), insert the Words By this construction, the cylinder bores of an air cooled iiiocir can be located eiose together, and the cylinders as efficiently eooied as in nir cooieci engines Where individual cylinders are used toprovide a cooling air space between them: and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the ease in the Patent Office.
Signed and seaied this 8th day oi iietober, A. D. 1935.
Leslie Frazer (Seai) Acting Commissioner of Patente.