Patent ID: 7806099

Claim:
A centralised lubrication system for lubricating cylinder faces in large diesel engines, and marine engined, including at least one lubricating apparatus with a number of reciprocating pumps actuated by cams on a rotating control shaft which is a driven shaft, reference means connected with a main shaft of a diesel engine and the reference means directly or indirectly indicates position of the main shaft and thereby also position of the an engine piston, sensor means for detecting position of the reference means and thereby angular position as well as angular speed for the mainshaft, and said sensor means generating digital or electrical signals indicating these parameters, and a control unit which is connected to and receives said digital or electrical signals from said sensor means and wherein the control unit includes means to detect the angular position as well as the angular speed for the reference means and thereby for the main shaft/engine piston wherein said system includes: an AC motor connected with and driving the control shaft; signal converter means connected to the sensor means and to the control unit; wherein the control unit is adapted for receiving the digital/electric signals and is connected with and controls the AC motor for regulating the rotation of the control shaft and thereby the actuation of the reciprocating pumps; and wherein the sensor means include two reference sensors that are mutually disposed along a circumferential direction of the main shaft.