A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft...

piston engine (e.g. two-stroke engine, four-stroke engine). "Stroke length", the distance travelled by the piston during each cycle. The stroke length...

contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle. During the stroke from bottom...

six-stroke engine is one of several alternative internal combustion engine designs that attempt to improve on traditional two-stroke and four-stroke engines...

Two- and four-stroke engines are engines that combine elements from both two-stroke and four-stroke engines. They usually incorporate two pistons. The...

of the five-stroke engine is to achieve higher efficiency than a four-stroke engine. In order to increase efficiency, a secondary cylinder is added as...

A two-stroke diesel engine is a diesel engine that uses compression ignition in a two-stroke combustion cycle. It was invented by Hugo Güldner in 1899...

The Otto engine is a large stationary single-cylinder internal combustion four-stroke engine, designed by the German Nicolaus Otto. It was a low-RPM machine...

Power Stroke, also known as Powerstroke, is the name used by a family of diesel engines for trucks produced by Ford Motor Company and Navistar International...

two-strokes for longer than most. Their first four-stroke engine was the SOHC F8A, which appeared in 1977. Suzuki continued to offer a two-stroke engine in...

timing developed by Volkswagen Group in 2011. They all include a four-stroke engine and dual overhead camshaft drive into exhaust manifolds. In 2023 Škoda...

hot-bulb engine with the two-stroke scavenging principle, developed by Joseph Day to provide nearly twice the power, as compared to a four-stroke engine of...

revolution. This unusual reciprocating engine had the intake, compression, power, and exhaust strokes of the four-stroke cycle in a single turn of the crankshaft...

familiar two-stroke and four-stroke piston engines, along with variants, such as the six-stroke piston engine and the Wankel rotary engine. A second class...

initiate the next cycle. In a four-stroke engine, the third stroke releases energy from the fuel, powering the fourth (exhaust) stroke and also the first two...

configurations of the various bore/stroke ratio: A square engine has equal bore and stroke dimensions, giving a bore/stroke value of exactly 1:1. 1953 – Ferrari...

a piston engine that surrounds the crankshaft. In most modern engines, the crankcase is integrated into the engine block. Two-stroke engines typically...

succeeded in making the Four Stroke, Compressed Charge engine. It is this engine (the Otto Silent Engine), and not the Otto & Langen engine, to which the "Otto...

A four-stroke straight-four engine always has a cylinder on its power stroke, unlike engines with fewer cylinders where there is no power stroke occurring...

filling the cylinder with the next intake charge (as per four-stroke engines). An opposed piston engine uses uniflow scavenging, however this design uses piston-controlled...

Four-stroking is a condition of two-stroke engines where combustion occurs every four strokes or more, rather than every two. Though normal in some instances...

regular use with some two-stroke engines because it does not possess lubricating qualities by itself. Lubrication for two-stroke engines is achieved using oil...

Vincennes) was a French engineer. He was the first to patent the four-stroke engine in 1862, but he did not build one and the idea was subsequently developed...

motorcycle first released in 2001 by Yamaha. It features a DOHC, four-stroke engine and initially had a steel frame and subframe in 2001–2002. In 2003...

uses a 256 cc (16 cu in) two-stroke engine. In 1980, Suzuki began production of a 543 cc (33 cu in) four-stroke engine, which was introduced in the Alto...

form, the Wankel engine has lower thermal efficiency and higher exhaust emissions relative to the four-stroke reciprocating piston engine. The thermal inefficiency...

Loading sample on chromatography columns. Certain types of two-stroke and four-stroke engines. Most hydraulic automotive power steering control valves. In...

pressed-steel frame, hydraulic front and rear forks, a 49 cc (3.0 cu in) OHV four-stroke engine. The cylinder was laid horizontally to optimise cooling. The final...

fyrtaktsmotorn i Saab 95/96 1966" [Notes on the introduction of the four stroke engine in the 1966 Saab 95/96.]. Archived from the original on 4 January...

commonly known as the Otto cycle and four-stroke engines using spark plugs often are called Otto engines. The cycle has four parts: a mass containing a mixture...