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Machine translation
1. (WO1979000649) CYLINDER LINER HONING
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000649    International Application No.:    PCT/US1979/000010
Publication Date: 06.09.1979 International Filing Date: 08.01.1979
IPC:
B24B 33/08 (2006.01)
Applicants:
Inventors:
Priority Data:
879844 22.02.1978 US
Title (EN) CYLINDER LINER HONING
(FR) SURFACAGE D"UNE CHEMISE DE CYLINDRE
Abstract: front page image
(EN)The honing of the inner cylindrical wall of engine cylinders or cylinder liners. Coarse honing of an inner cylindrical wall of a cylinder or cylinder liner allows more oil to remain in scratches in the wall after the piston rings pass a particular point on the wall than if the wall is fine honed. The more oil that remains in the scratches the more oil there is to burn during the expansion stroke of the piston. It is desirable to provide a relatively coarse finish (24) at one end (18) of an inner cylindrical wall (12) of a cylinder or a cylinder liner (13) and a relatively finer finish (26) towards another end (20) of said inner cylinder wall (12). A honing member (14) is provided for rotation and oscillation in contact with the inner cylinder walls (12). A first section (16) of the honing member has a relatively coarse grit surface (24) and a second section (22) of the honing member (14) has a relatively fine grit surface (26). The above mentioned oscillation and rotation of such a honing member (14) comprises an improved method for honing a cylindrical wall (12).
(FR)Surfacage de la paroi cylindrique interne de cylindres de moteurs ou de chemises. Un surfacage grossier de la paroi cylindrique interne d"un cylindre ou d"une chemise permet de retenir dans les rayures de la paroi, apres le passage du segment de piston, une quantite d"huile plus importante que lorsque le surfacage de la paroi est fin. Plus la quantite d"huile retenue dans les rayures est importante, plus il y a d"huile a bruler pendant la course de detente du piston. Il est souhaitable de prevoir un surfacage relativement grossier (24) a une extremite (18) de la paroi interne cylindrique (12) d"un cylindre ou d"une chemise (13) et un surfacage relativement plus fin (26) vers l"autre extremite (20) de ladite paroi interne cylindrique (12). Un element de surfacage (14) est anime d"un mouvement de rotation et d"oscillation, en contact avec les parois internes cylindriques (12). Une premiere section 616) de l"element de surface presente une surface (24) a grain relativement grossier et une deuxieme section (22) de cet element presente une surface (26) a grain relativement fin. Le mouvement d"oscillation et de rotation de l"element (14) implique un procede perfectionne pour surfacer une paroi cylindrique (12).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)