Valve timing diagram 4 stroke engine full#

The factory ran out of space and was moved to the town of Deutz, Germany in 1869, where the company was renamed to Deutz Gasmotorenfabrik AG (The Deutz Gas Engine Manufacturing Company). Otto and Cie succeeded in creating a successful atmospheric engine that same year. In 1864, Otto and Eugen Langen founded the first internal combustion engine production company, NA Otto and Cie (NA Otto and Company). Many other engineers were trying to solve the problem, with no success. He tried to create an engine that would compress the fuel mixture prior to ignition, but failed as that engine would run no more than a few minutes prior to its destruction. In 1862, Otto attempted to produce an engine to improve on the poor efficiency and reliability of the Lenoir engine. In testing a replica of the Lenoir engine in 1861, Otto became aware of the effects of compression on the fuel charge. The Lenoir engine ran on illuminating gas made from coal, which had been developed in Paris by Philip Lebon. The 18 litre Lenoir Engine produced only 2 horsepower.

In 1860, Lenoir successfully created a double-acting engine that ran on illuminating gas at 4% efficiency. In his travels, he encountered the internal combustion engine built in Paris by Belgian expatriate Jean Joseph Etienne Lenoir. Nikolaus August Otto was a traveling salesman for a grocery concern. See also: Otto engine An Otto Engine from 1880s US Manufacture The major alternative design is the two-stroke cycle. This action expels the spent air-fuel mixture through the exhaust port.įour-stroke engines are the most common internal combustion engine design for motorized land transport, being used in automobiles, trucks, diesel trains, light aircraft and motorcycles. During the exhaust stroke, the piston, once again, returns from B.D.C. This stroke produces mechanical work from the engine to turn the crankshaft. (the end of the compression stroke) the compressed air-fuel mixture is ignited by a spark plug (in a gasoline engine) or by heat generated by high compression (diesel engines), forcefully returning the piston to B.D.C.

Valve timing diagram 4 stroke engine full#

At this point the crankshaft has completed a full 360 degree revolution. This is the start of the second revolution of the four stroke cycle.

Combustion: Also known as power or ignition.

Both the intake and exhaust valves are closed during this stage. In this stroke the piston compresses the air-fuel mixture in preparation for ignition during the power stroke (below).

Compression: This stroke begins at B.D.C, or just at the end of the suction stroke, and ends at T.D.C.

In this stroke the intake valve must be in the open position while the piston pulls an air-fuel mixture into the cylinder by producing a partial vacuum (negative pressure) in the cylinder through its downward motion. This stroke of the piston begins at top dead center (T.D.C.) and ends at bottom dead center (B.D.C.).

Intake: Also known as induction or suction.A stroke refers to the full travel of the piston along the cylinder, in either direction. The cylinder wall is a thin sleeve surrounding the piston head which creates a space for the combustion of fuel and the genesis of mechanical energy.Ī four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. The right blue side is the intake port and the left brown side is the exhaust port. Four-stroke cycle used in gasoline/petrol engines: intake (1), compression (2), power (3), and exhaust (4).