Patent ID: 6854431

Claim:
An internal combustion engine ( 10 ), comprising a hydraulic system ( 32 ) that includes a hydraulic pump ( 34 ), and a lubricant system ( 14 ), for lubricating moving parts of the engine ( 10 ) including a lubricant pump ( 16 ), the hydraulic pump ( 34 ) being connected to the lubricant system ( 14 ) in such a way that lubricant is pumped from the lubricant pump ( 16 ) through a line ( 48 ) to the hydraulic pump ( 34 ) for lubricating the hydraulic pump ( 34 ), wherein the hydraulic pump ( 34 ) pumps a hydraulic fluid that differs from the lubricant of the lubricant system ( 14 ) of the engine ( 10 ), wherein the hydraulic fluid has a lower viscosity.