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Rotary engines of the Wankel design are used in some automobiles, aircraft and motorcycles. These are collectively known as internal-combustion-engine vehicles (ICEV). [18] Where high power-to-weight ratios are required, internal combustion engines appear in the form of combustion turbines, or sometimes Wankel engines.
Four-stroke engines are the most common internal combustion engine design for motorized land transport, [1] being used in automobiles, trucks, diesel trains, light aircraft and motorcycles. They are also used in machinery such as lawn mowers, pressure washers, cultivators, and portable generators. The major alternative design is the two-stroke ...
Internal combustion engines can contain any number of combustion chambers (cylinders), with numbers between one and twelve being common, though as many as 36 (Lycoming R-7755) have been used. Having more cylinders in an engine yields two potential benefits: first, the engine can have a larger displacement with smaller individual reciprocating ...
Two-stroke engines often have a higher power-to-weight ratio than a four-stroke engine, since their power stroke occurs twice as often. Two-stroke engines can also have fewer moving parts, and thus be cheaper to manufacture and weigh less. In countries and regions with stringent emissions regulation, two-stroke engines have been phased out in ...
Internal combustion engines date back to between the 10th and 13th centuries, when the first rocket engines were invented in China. Following the first commercial steam engine (a type of external combustion engine) by Thomas Savery in 1698, various efforts were made during the 18th century to develop equivalent internal combustion engines.
The engine configuration describes the fundamental operating principles by which internal combustion engines are categorized. Piston engines are often categorized by their cylinder layout, valves and camshafts. Wankel engines are often categorized by the number of rotors present. Gas turbine engines are often categorized into turbojets ...
In an internal-combustion engine, a turbocharger is a great way to boost power and efficiency for an engine of a given displacement, and over the last decade we've seen a proliferation of ...
The Atkinson-cycle engine is a type of internal combustion engine invented by James Atkinson in 1882. The Atkinson cycle is designed to provide efficiency at the expense of power density . A variation of this approach is used in some modern automobile engines.