초록 ▼

An injection line connection for internal combustion engines having for each pressure connection a connecting fitting which hitherto was upset out of the material of the injection line but which is still defective and which can be pressed by a cap nut, by way of a pressure ring, against an internal

An injection line connection for internal combustion engines having for each pressure connection a connecting fitting which hitherto was upset out of the material of the injection line but which is still defective and which can be pressed by a cap nut, by way of a pressure ring, against an internal taper portion of a connecting member which carries the cap nut, is also suitable for thinner injection lines, free of disadvantages, by virtue of the following features, some of which are known and which are reproduced here by way of abstract: (a) the injection line (1) is a wall thickness in the range of from 1/5 to ⅓of its outside diameter (D); (b) each pressure ring (6) is provided with a support projection (10) which is rounded off at the end towards the connecting fitting and which is of a tapered configuration along its outside periphery, while the associated connecting fitting (3) comprises the end of the injection line (1) which is flanged over outwardly about the support projection (10) and there forms the sealing taper portion (9); (c) the outside diameter (da) of each ring (6) is about 1.8 to three times the outside diameter (D); (d) each support projection (10) is of an axial length (L) which is in the range of the wall thickness (s) of the injection line (1), and a wall thickness (w′) which is at least about ¼of the outside diameter (D).

대표청구항 ▼

A pressure connection for at least one end of an injection line for internal combustion engines, said pressure connection comprising: a connection fitting formed as a flanged-over portion of the free end of the injection line; a pressure ring formed of a material which is harder and less flexible th

A pressure connection for at least one end of an injection line for internal combustion engines, said pressure connection comprising: a connection fitting formed as a flanged-over portion of the free end of the injection line; a pressure ring formed of a material which is harder and less flexible than the material of the injection line, said ring having a rearward contact surface and a forward annular support projection which is rounded off at its free end toward said connecting fitting and has a tapered outer peripheral surface, said flanged-over portion of said connecting fitting enclosing said support projection; a sealing taper formed on the outer surface of said flanged-over portion of said connecting fitting, said sealing taper having an angle corresponding to the angle of said tapered outer peripheral surface; annular abutment means extending outwardly on said ring and engaging the free end of said flanged-over portion of the injection line in abutting relationship; a connecting member having external threads and an internal taper for sealingly engaging said sealing taper formed on the outer surface of said flanged-over portion; a cap nut having internal threads engageable with said external threads on said connecting member and having an inner annular shoulder for contacting said rearward contact surface of said ring; whereby said cap nut is threaded onto said connecting member and tightened down, said connecting member positively and sealingly engages the sealing taper of the flanged-over portion of said connecting fitting, said ring and flanged-over end are forced together with said free end of the injection line being deformed toward said annular abutment means to thereby suddenly increase the resistance against a further tightening rotation of said cap nut when said free end abuts said annular abutment.