A lower link (6) is provided with an oil hole (30) in a crank pin bearing portion (11) in order to supply a jet of oil to a connecting portion between an upper pin (4) and an upper link (3). Oil hole (30) is composed of a first oil hole (31) linearly exten...

When the compression ratio of a variable compression ratio internal combustion engine (10) is set at a low compression ratio, a lubricating oil ejected from a lower link oil passage (25) is reflected by an upper link (11) at the piston top dead center, and...

The piston-cylinder unit (2) has a cylinder (20) with a cylinder jacket (17) limiting the cylinder internal space (18), and a piston with a piston lateral surface (4), a piston upper side (5) and a piston lower side (6). A lubricant collector (7) is arrang...

The engine has connectors (13, 14) for connecting a drive shaft with a piston. A lubrication- or cooling device lubricates or cools a cylinder and/or the piston and/or the connector by a fluid medium. A connecting pipe (11) promotes the medium from a reser...

A main bearing for a crankshaft of an internal combustion engine comprises a pair of semi-cylindrical bearings (17, 18). An oil groove (17a) extends on an inner circumferential surface (17S) of one semi-cylindrical bearing (17) in a circumferential directi...

Bending of a lubricant branch pipe can be reduced as much as possible, the pipe length of the lubricant branch pipe can be reduced as much as possible, and pressure loss of the lubricant that flows in the lubricant branch pipe can be reduced. A central axi...

The piston engine arrangement has an engine housing (25) and a lubricant reservoir (23), where a connecting element (24) is arranged for connecting the engine housing with the lubricant reservoir. A compensating element is provided with a sealing material ...

An internal combustion engine with a cylinder lubricating system is proposed; with the system it becomes possible to supply lube oil of required amount at required timing to each of lubricators, and normal supply of lube oil is possible even when malfuncti...

The lubrication system for the crankshaft, in a piston motor, has a lubricant distributor (42) at the bearing bush (29), positioned by it. The bearing bush (29) has an opening (54), which works with the lubricant distributor (42), and a lubricant groove (5...