VALVE ROCKER ARM SYSTEM WITH BEARING INSERT WITH GROOVE Russian patent published in 2011 - IPC F01M9/10 

FIELD: engines and pumps.

SUBSTANCE: invention relates to engine building industry. Valve rocker arm system (1) of inner combustion engine contains valve rocker arm (2) and bearing journal (4). The journal (4) has outer circumferential surface performed in a form of working surface (5) and is inserted into the bearing insert (6) central hole (3) of valve rocker arm (2) enveloped by the insert (6) in such a way that valve rocker arm (2) is installed at working surface (5) with the possibility of rotation. Inside the journal (4) there is the first oil channel (8, 9) that ends, at least, at one outlet port (10, 11) at working surface (5) located below the central longitudinal axle (7) of the journal (4). Bearing insert (6) rigidly connected with valve rocker arm (2) has semi-cylindrical form with curved outer surface of the insert (21) and curved inner surface of the insert (22). The lower part of the curved inner surface of the insert (22) is equipped with, at least, one inner grove (23) that lies in circumferential direction and ends from the both sides below the central longitudinal axle (7), which protrudes, at least, to the area where there located is outlet port (10, 11) of first oil channel (8, 9) at valve rocker arm (2) initial position. The curved outer surface of the insert (21) is equipped with, at least, one outer groove (24, 25) that lies in circumferential direction and reaches the inlet port (19, 20) of the second oil channel (17, 18) inside valve rocker arm (2). Bearing insert (6) contains, at least, one through hole (26, 27) that connects inner groove (23) and outer groove (24, 25).

EFFECT: reduction of oil loss.

7 cl, 2 dwg