Abstract

The invention relates to a system for lubricating the piston and the crankshaft in two-stroke internal combustion engines, in which the wall (1) of the engine cylinder has one or more ducts (2) that extend to the inside chamber (3) of the cylinder, while inside the crankshaft (7), with which the piston (5) of the cylinder is associated by means of a rod (8), there is a duct (9) that communicates with the rotating coupling of the rod (8) and the crankshaft (7), the aforementioned ducts (2) and said duct (9) providing a supply of oil as a function of engine revolutions and opening of the throttle.

IPC Classes  ?

• F01M 1/06 - Lubricating systems characterised by the provision therein of crankshafts or connecting-rods with lubricant passageways, e.g. bores
• F01M 11/02 - Arrangements of lubricant conduits

Abstract

Two-stroke combustion engine with combined injection, comprising a cylinder (1) provided with a gas-expulsion outlet (5) and an inlet (6) that communicates with a carburettor (7), a piston (2) moving to and fro in said cylinder (1), there being, in the actual cylinder (1), an injector (8) that injects fuel directly into the chamber of said cylinder (1) throughout operation of the engine on the basis of a position in the advance travel of the piston (2) in which said piston (2) closes off the gas outlet (5) whilst on the basis of an engine-revolution rate there is, at the same time, indirect injection of fuel/air from the carburettor (7).

IPC Classes  ?

• F02M 71/00 - Combinations of carburettors and low-pressure fuel-injection apparatus