| 摘要 |
A transfer pump for the injection of fuel under high pressure of the type comprising a piston ( 10 ) providing the hydraulic liquid to a deformable bellows ( 14 ), the deformations of said bellows ( 14 ) in a cylindrical chamber ( 20 ) filled with fuel giving rise to a high pressure pumping effect of said fuel; a cam ( 5 ) provided with lugs ( 6 ) carried by a drive shaft ( 1 ), is characterized in that the oil portion of the pump comprises: the portion of the drive shaft ( 1 ) bearing the cam ( 5 ); the cam ( 5 ) and its lugs ( 6 ); the roller ( 7 ) with its shaft ( 8 ) and its roller bearing ( 9 ) carried by a bearing member ( 12 ), by which roller the cam( 5 ) bears on the piston ( 10 ); as well as the upper portion of said piston ( 10 ); such that all the mechanical drive portion and angle change are bathed in the oil of the oil portion.
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