Патент USA US2137129код для вставки
NW- 15, 193%. 2,137,129 J. BROWN ET AL ROTARY VALVE FOR INTERNAL COMBUSTION ENGINES _Filed Nov. 9, 1957 22 a Sheets-Sheet 1 ‘ 1A 17 15 Fig. 4. 76 49 l 49 Fig. 5.‘ Fig 7 18 10 ' Fig. 6.@/1o ' 13 . 112 v1,)“ By ‘ Fig. 8. 10 Nmh 15, 193$‘ .1. BROWN ET AL‘ 2,137,129 ROTARY‘VALV'E FOR INTERNAL COMBUSTION ENGINES Filed Nov.‘ 9, 1937 5 Sheets-Sheet 2 I v NQV- 15,=~1933- J. BROWN ET AL $2,137,129 ROTARY VALVE FOR INTERNAL COMBUSTION ENGINES Filed NOV. 9‘, 1957 A M4 r-v- * / / 50 3 Sheets-Sheet 3 I Patented Nov. 15, 1938 7 2,137,129 ,‘ UNITED-‘STATES. PATENT OFFICE ~ 2,137,129 ROTARY VALVE vFOR INTERNAL ‘COMBUS TION ENGINES Edward Brown, Wednesbury, John Brown 1 and England ' ‘ ' wApplication November 9, 1937, Serial No. 173,684 In Great Britain November 11, .1936 6 Claims. ‘(CL 123-190) This invention comprises certain improvements l2, while the other part has a similar inclined face in or relating to rotary valves .for internal com bustion engines. _ . > M, the . inclinedfaces sliding on one another as '7 . By this inventiona continuous circulation of oil 5 is fed into a recess in the rotaryvalve to cool the valve. ;,A continuous circulation of oil is also fed 2, the sealing element being let into a recess in the to the bearing‘su'rface of the rotary valve and the detachable head. or The‘ ‘sealing element has a oil is directed‘ frominlet ducts to outlet ducts. port l6 therein which registers with the inlet and exhaust ports in the rotary valve as such valve rotates, and a surrounding surface I‘! which forms a sealing surface around the port. The sealing into which latter ducts the oil-is directedvby the '10 sealing pad aforementioned.’ Referring to the drawings‘: ’ _. v Fig. 1 is a cross sectional elevationof .a cylin—. der head of an internal combustion engine having a rotary valve mechanism constructed according 16 the split ring expands or contracts. A_ sealing element l 5 is interposed between the sealing ring l0 and the cylindrical surfaceof the. rotary valve to this invention... 7 ' ' ' Fig. 2 is a section of the cylinder head on line II-II of Figure 1, the rotary valve being shown in full lines. , , ‘ n‘ ‘ . it? element is pressed against the Valve 2 by means of a spring “3 (Figure 5); The sealing ring [0, not. only expands radially under spring tension but also tends to slide up‘ the conical seating 9 it? to press against the ?at. outer surface of the ele mentl5.,' , ' ' The exhaust port l9 in the valve is ?tted with a pipe‘20. which is heat insulated from the body Fig. 3 is a section on line III‘,—III of Figure 2. Fig. 4 is a perspective View of the sealing, pad. , of the valve by means of asbestos lining 2|. The Fig. 5 is a perspective View of vthe spring'ring pipe 20 has a spout 22 to prevent‘ formation of for bearingon the sealing'pad. ‘ ,. carbon. The exhaustport passes from one end of Fig. 6 is a perspective View. of the sealing ring... the. rotary valve whilst the inlet port ll passes Figs- 7 and .8' arerespgectively end ‘views of the from the other end. ' ' . . 25 split ends of the sealing ring.’ , ‘ ‘ During the ?ring stroke one side of the valve is Fig. _9 is. a perspective view of the oiling pad,_. subjected to considerable heat and this side has an and ' oil cooling chamber 23 through which oil con Fig. 10 is‘a section through'the cylinder. head’ stant'ly circulates. _‘ A groove 24 is formed in the with the rotary valve removed, the section being cylinder head around the periphery of the bearing 30. taken on line X-—.X of‘ Figure 3. ring 4. and this groove is in communication with a According to a convenient embodiment, the: non-return valve spring ball controlled oil inlet invention is applied toa singlecylinder air cooled 25. Thegroove 274 is’ placed in communication ' motorcycle engine. The detachable head I has a with an annular groove 26 in the internal surface 20 cylindrical "bore for receiving a cylindrical rotary, of the bearing ring 4 by means of passages 21 35 ‘ valveZ which is ?xed in position by the lock nut 3 which bears against .the bearing ring 4. slidably and, the groove 26. is placed in communication as; with the chamberf23 by means of the passages but non-rotatably mounted in the cylinder head. I‘. An oil seal is formed by a metal ring 5 which 28. The chamber 23 is divided by a central par tition 29 and the passages 28 lead to one side of is clamped between ‘the bearing ring _4 and the this partition. Outlet passages 30 lead from the 40 cylinder head I at its outer periphery and spring chamber 23 on the other side of the partition 29 pressed at its inner periphery against the shoulder and such passages 30 lead to an annular groove 3| 6 on the rotary valve. The rotary valve is driven‘ in the bearing ring 4. This groove 3| communi by a bevel gearing ‘I and 8. The detachable head I has a port having a 45 conicalfseating 9, for receiving a sealing ring ID. The sealing ring I0 is formed of cast steel or other metal and has a conical outer circumference for bedding against a conical seating 9 around the port. The inside face of the ring curves in 50 wardly from the ?at seating I2 to the inner edge of the conical outer wall. The ring is split and stepped so that the split ends overlap. Prefer ably for this purpose an inclined face I3 is cut on one side of the ring from a point below the 55 middle of the conical outer wall to- the flat seating cates by way of passages 32 with .a passage 34 returning the oil to the source of supply. The oil ‘is thus continuously circulated through the cool ing compartment 237 while the bearing ring 74 is also eiiiciently lubricated. , i In order to ‘lubricate the cylindrical wall of the rotary valve by means of a constantly circu lating flow of oil, a lubricating pad 35 is pressed 50 against the wall of the valve, this pad has two end limbs 36 having oil ducts 31 which emerge from the raised portion 38 bearing in the an nular grooves 39 in the cylindrical valve. The lubricating pad 35 has a U-shaped passage 39a 55 2 2,137,129 which communicates with the flow and return pipes 40 and 4| which communicate with ducts 42, 42a in a bridge piece 43 ?xed to the cylinder ber is behind that portion of the valve which closes the combustion chamber during the ?ring head. The pipes 40 and 4| spring support the lubricating pad 35 and such pad 35 is pressed 3. A rotary valve mechanism for internal com bustion engines, comprising a cylinder head, a on the valve 2 by means of a member 44 pressed outwardly by means of a spring 45, the pressure of which may be adjustable to govern'the ?lm of oil supplied through the ducts 38. The duct cylindrical rotary valve mounted in the head, and 10 42 is in communication by means of the passage stroke. , means for feeding oil to the bearing surface of the valve‘ wall comprising an oiling-pad pressed against the wall of said cylindrical valve and hav ing an oil duct or ducts fed from a continuous 10 46 with the oil supply entering the valve 25," whilst the duct 42a returns the oil to the source of supply. The lubricating pads have inclined projections 41 which scrape the oil passed 15 through the ducts 38 inwardly of the rotary valve, the rotary valve rotating in the direction from circulating stream of oil which oil duct or ducts open directly on the wall of the valve, and scraper “devices and oil channels for directing the oil from the feed ducts over the surface of the rotary , valve to outlet ducts leading the oil back to the 15 source of supply. the scrapers 41 to the ducts 38. ‘ The bearing 4. A rotary valve mechanism for internal com surface of the cylinder head is provided‘ with - bustion engines, comprising a bore in the cylin inclined oil channels 48 which collect the oil, der head, a cylindrical rotary valve mounted in 20 from the surface of the rotary valve and direct the bore, an oiling pad, a spring device for press 20 the same towards the centre of the valve. These ing the oiling pad against the wall of the rotary grooves 48 are shaped to scrape the oil into the valve, and means for feeding oil to the bearing grooves. The oil therefore is caused to flow to wards the centre of the rotary valve and the 25 sealing element l5 forms a scraper and causes the oil to flow away through the ducts 49 into - the ‘annular groove 50 which is in communica tion with the duct 5| for returning the oil to the source of supply. The continuous flow of oil 30 therefore lubricates the bearing surface of the rotary valve, whereby oil is prevented from burn ing and carbonizing. Annular grooves 55 are formed in the cylinder head on each side of the valve and these annular grooves are in communi 35 cation withthe groove 50 so that any oil which iiowsoutwardly on the rotary valve will also be returned to the source of supply. The outer end of the rotary ‘valve on the in let side is sealed by means of a rubber ring 52 40 which is pressed between the washer and a cas ing 53 by means of a spring ring 54. We claim: 1., A rotary, valve mechanism comprising a cyl inder head, a rotary cylindrical valve mounted 45 in the cylinder ‘head, a bearing ring or member surface of the valve wall, said oiling pad hav ing an oil duct fed from a continuous circulat ing stream of oil which oil duct opens directly 25 on the outer surface of the valve, and a scraper device and oil channels for directing the oil from the feed duct over the surface of the rotary valve to outlet ducts leading the oil back to the source of supply. , 30 a 5. A rotary valve mechanism for internal com bustion engines, comprising a bore in the cylin der head, a cylindrical rotary valve mounted in the bore, an oiling pad, a spring device for press ing the oiling pad against the wall of the rotary 35 valve, and means for feeding oil to the bearing surface of the valve wall, said oiling pad having an oil duct fed from a continuous circulating stream of oil which oil duct opens directly on the outer surface of the valve, a scraper device on 40. the oiling pad for diverting the oil centrally of the valve and oil channels in the bore of the cylinder head for causing the oil to ?ow towards the centre of the valve. 6. A rotary valve mechanism for internal com on one'side of the valve and ?tted in an annular bustion engines, comprising arbore in the cylinder recess in the cylinder head, an annular oil duct surrounding the periphery of the bearing mem ber, two annular ducts around the internal pe 50 riphery of the bearing member, and ducts in the head, a cylindrical rotary valve mounted in the bore, an oiling pad, a spring device for pressing ' wall of the valve for registering with ducts lead ing to the respective annular ducts or the in terior of the bearing member for the feed and - return ?ow of oil to an interior chamber in the valve for cooling the valve. 2. A rotary valve mechanism comprising a cylinder head, a rotary cylindrical valve mounted in the cylinder head, a bearing ring or member on one side of the valve and ?tted in an annular 60 recess in the cylinder head, an annular oil duct surrounding the periphery of the bearing mem ber, two annular ducts around the internal pe riphery of the bearing member, and ducts in the wall of the valve for registering with ducts lead ing to the respective annular ducts or the in terior of the bearing member for the feed and return ?ow of oil to an interior chamber in the valve for cooling the valve, which cooling cham the oiling pad against the wall of the rotary valve, and means for feeding oil to the bearing sur face of the valve wall, said oiling pad having;50 an oil duct fed from a continuous circulating stream of oil which oil duct opens directly on the outer surface of the valve, a scraper device on. the oiling pad for diverting the oil centrally 55 of the valve, and oil channels in the bore of the cylinder head for causing the oil to flow towards the centre of the valve, a sealing element bear~ ing against the wall of the rotary valve having ducts at the side for leading oil from the wall 60 of the‘ cylinder to return such oil to the source of supply, and a sealing ring forming a gas tight seal with a sealing in the port leading from the combustion chamber and a gas tight seal with the said sealing element. 65 ' JOHN BROWN. EDWARD BROWN.