Патент USA US2405847код для вставки
Aug; E3, 194%. c. G. PULLIN 2,4053%? - COOLING JACKET ' FOR INTERNAL -CO-MBUSTION ENGINES Filed March 23,_ 1945 , FIG’ J. Patented Aug. 13, 1946 2,405,847 UNITED STATES PATENT OFFICE 2,405,847 CQOLING JACKET FOR INTERNAL COMBUSTION ENGINES Cyril George Pullin, Wimbledon, London, Eng land, assignor to The Cierva Autogiro Company Limited, London, England, a British company I Application March 23, 1945, Serial No. 534,273 In Great Britain April 28, 1944 2 Claims. (Cl. 123-173) 1 . This invention relates to cooling jackets for liquid-cooled internal-combustion engines. My primary object is to provide a jacket so connected to both a jacketed cylinder head and a cylinder barrel that relative movement between these two parts as a result of differential thermal expansion will be permitted. A further object of this invention is to provide a very light and simple construction. In my invention I make the jacket that sur- ’ 2 the part 9 is united to a metal ring it which is bonded by rubber H to an end surface l2 of the cylinder head 2 which lies in a plane at right angles to the axis of the barrel 5. Water ports is are provided in this end surface i2 and the ring H3 is formed with corresponding ports M as shown in Figure 2 so that water can ?ow from the space within the jacket ‘I to the space 6. In order to prevent the rubber of the bonding ring I! from obscuring the ports l3 and ill when they rounds the cylinder barrel from a sheet-metal 10 are brought into registration with one another shell which is rubber-bonded directly or indirect and the bonding process takes place, liners l 5 are ly to both the barrel and the cylinder head. The provided around the edges of the registering ports. shell, being made of sheet-metal, is very light, When the shell ‘I has been welded or otherwise and the rubber bonds provide enough resilience secured to the ring I [l a cylindrical skirt it in to allow for diiferential thermal expansion. tegral with the part 8 lies around external cool ing ?ns I‘! on the barrel i. Rubber bonding ma~ plied to a jacketed cylinder head that is inter terial i8 is put in position between these ?ns ll nally screw-threaded to ?t over an externally and the skirt iii and the skirt is then rolled in so screw-threaded barrel. In this type of construc 20 that it becomes bonded through the rubber to the tion the head is heated to enable the barrel to ?ns I] as shown in Figure 3. be screwed into it, so that in effect it is shrunk A liquid inlet connection is is welded to the onto the barrel, and the cooling jacket must be 'conical part 8 of the jacket ‘I and a liquid outlet ?tted after these operations have been carried connection 20 is formed in the head 2. Of course out. The invention is particularly useful when ap A construction in accordance with the invention will now be described by way of example with reference to the accompanying drawing in which: Figure 1 is an axial section through the cylinder head and the end of the barrel of a cylinder 30 equipped with my novel cooling jacket construc "tion; Figure 2 shows part of a metal ring and rubber bonding serving for indirect connection of the jacket to the cylinder head shown in Figure 1'; if desired the cooling water may flow in the other 7 direction, that is to say in through the connection 23 and out through the connection l9. ‘ One advantage of the invention is that it pro vides a simple means of converting an air-cooled cylinder assembly to liquid cooling. ' What I claim is: _ 1. In aliquid-cooled internal combustion en gine, a cylinder having a head and a barrel, said head presenting an end surface lying in a plane ' and at right angles to the axis of said barrel, a metal Figure 3 is an enlargement of part of Figure 1 showing the joint at the skirt of the sheet metal coolant jacket. The construction shown in Figure 1 comprises 40 ring rubber-bonded to said surface, and a cooling jacket surrounding said barrel, said jacket com a cylinder barrel l with an external screw-thread at its upper end which mates with the corre sponding thread in a cylinder head 2 provided with an exhaust valve 3 and an inlet valve 4 of prising a sheet-metal shell rubber-bonded to said barrel and united to said ring. 2. In a liquid-cooled internal combustion en gine, a cylinder having a jacketed head and a barrel secured in said head, said head presenting an end surface lying in a‘plane' at right angles to the axis of said barrel and formed with ports for standard construction. The head is ?rst heated, 45 the passage of cooling liquid into the jacket then the barrel is screwed in and next a locking around said head, a metal ringformed with com ring 2! is tightened up to make the joint between plementary ports in registration with said ?rst the head and the barrel gas-tight. ‘ The head 2 is surrounded by and integral with a cooling mentioned pOrts, said metal ring being rubber end of the barrel in accordance with this inven tion and takes the form of a sheet-metal shell rubber from obscuring said ports, and a cooling jacket surrounding said barrel and united to said jacket 5 so as to leave a, space 6 for circulating 50 bonded to said surface, liners around the edges of said registering ports to prevent the bonding water. A water jacket is provided around the 1 composed of a conical part 8 and a cylindrical The upper end of 55 part 9 welded to the part 8. metal ring. 7 CYRIL GEORGE PULLIN.