Lubricating system in a 4-cycle engine

A 4-cycle engine, comprising:

• (a) an engine body having a piston, a crankshaft and a crank chamber;
• (b) an oil reservoir chamber adjacent said crank chamber and independent therefrom, said oil reservoir chamber having an oil mist generator therein drivably connected to said crankshaft;
• (c) a valve-operating chamber;
• (d) a first passageway connecting said oil reservoir chamber with said crank chamber to provide oil mist communication therebetween;
• (e) a second passageway connecting said crank chamber with said valve-operating chamber to provide oil mist communication therebetween;
• and
• (f) a third passageway connecting said valve-operating chamber with said independent oil reservoir chamber to provide oil communication therebetween,
• wherein said three passageways connect said three chambers in a manner such that a pressure difference is established in said three chambers by the reciprocating motion of said piston.

A 4-cycle engine, comprising:

• (a) an engine body having a piston, a crankshaft and a crank chamber;
• (b) an oil reservoir chamber adjacent said crank chamber and independent therefrom, said oil reservoir chamber having an oil mist generator therein drivably connected to said crankshaft;
• (c) a valve-operating chamber;
• (d) a first passageway connecting said oil reservoir chamber with said crank chamber to provide oil mist communication therebetween;
• (e) a second passageway connecting said crank chamber with said valve-operating chamber to provide oil mist communication therebetween;
• and
• (f) a third passageway connecting said valve-operating chamber with said independent oil reservoir chamber to provide oil communication therebetween,
• wherein said three chambers and said three passageways form a lubrication oil feed channel to provide one-way circulation of lubrication oil therethrough, and
• further wherein the following expression is established regardless of the direction of the reciprocating motion of said piston:
• Po<Pv
• wherein Po is pressure in the oil chamber;
• and Pv is pressure in the valve-operating chamber.

A 4-cycle engine, comprising:

• (a) an engine body having a piston, a crankshaft and a crank chamber;
• (b) an oil reservoir chamber adjacent said crank chamber and independent therefrom, said oil reservoir chamber having an oil mist generator therein drivably connected to said crankshaft;
• (c) a valve-operating chamber;
• (d) a first passageway connecting said oil reservoir chamber with said crank chamber to provide oil mist communication therebetween;
• (e) a second passageway connecting said crank chamber with said valve-operating chamber to provide oil mist communication therebetween;
• and
• (f) a third passageway connecting said valve-operating chamber with said independent oil reservoir chamber to provide oil communication therebetween,
• wherein the following expression is established during the downward movement of said piston:
• Po<Pv<Pc
• wherein Po is pressure in the oil reservoir chamber, Pv is pressure in the valve-operating chamber, and Pc is pressure in the crank chamber, and
• further wherein the following expression is also established during upward movement of said piston:
• Pc<Po<Pv.

A 4-cycle engine, comprising:

• (a) an engine body having a piston, a crankshaft and a crank chamber;
• (b) an oil reservoir chamber adjacent said crank chamber and independent therefrom, said oil reservoir chamber having an oil mist generator therein drivably connected to said crankshaft;
• (c) a valve-operating chamber;
• (d) a first passageway connecting said oil reservoir chamber with said crank chamber to provide oil mist communication therebetween;
• (e) a second passageway connecting said crank chamber with said valve-operating chamber to provide oil mist communication therebetween, said second passageway having a one-way valve disposed therein;
• and
• (f) a third return passageway connecting said valve-operating chamber with said oil reservoir chamber to provide oil communication therebetween;
• wherein said three chambers and said three passageways form a lubrication oil feed channel to provide one-way circulation of lubrication oil therethrough by pressure differences in said three chambers,
• wherein the following expression is established during the downward movement of said piston:
• Po<Pv<Pc
• wherein Po is pressure in said oil reservoir chamber, Pv is pressure in said valve-operating chamber, and Pc is pressure in said crank chamber;
• and
• further wherein the following expression is also established during upward movement of said piston:
• Pc<Po<Pv.