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...

crankshaft. A four-stroke engine requires four strokes of the piston to complete a power cycle in two crankshaft revolutions. In a two-stroke engine, the end...

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

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

four-stroke engines. Claimed advantages may include increased fuel efficiency, reduced mechanical complexity, and/or reduced emissions. These engines...

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...

000 rpm. Rotary engine Stirling engine Stroke (engine) Two- and four-stroke engines Two-stroke engine Four-stroke engine Six-stroke engine Thermodynamic...

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...

entering the cylinder(s). This design of the engine does not include an oil sump in the crankcase. Four-stroke engines typically have an oil sump at the bottom...

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

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...

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...

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...

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...

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...

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

engines. The 1967 Suzuki Fronte 360 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...

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...

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...

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

current model SuperJet is powered by a 1049cc inline three-cylinder, four-stroke engine. All generations have an upper and lower hull constructed from SMC...

handling with a liquid-cooled two-stroke engine and six-speed close-ratio transmission. Although only being manufactured for four years, the "250R", as it was...

their automobiles. This engine was Suzuki's first four-stroke car engine when it first appeared in 1977. The smallest F engine family with 543 cc of displacement...

four-stroke engine using aluminum alloy for the block, cylinder head and pistons. A 74 mm × 77 mm (2.91 in × 3.03 in) bore and stroke give the engine...

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...

Scavenging is equally important for both two-stroke and four-stroke engines. Most modern four-stroke engines use crossflow cylinder heads and valve timing...

A flat-four engine, also known as a horizontally opposed-four engine or boxer engine, is a four-cylinder piston engine with two banks of cylinders lying...

the Wankel engine has lower thermal efficiency and higher exhaust emissions when compared to the four-stroke reciprocating piston engine. The thermal...

series engine is a four-cylinder, four-stroke engine used in kei cars sold by Subaru in Japan, succeeding the EK family of two-cylinder engines previously...