Engines

thumb|right|225px|An animation showing the four stages of a Four-stroke engine|four-stroke gasoline-fueled internal combustion cycle with electrical ignition source: thumb|right|450px|Diagram of a jet engine. Jet engines use the [[heat of combustion to generate a high-velocity exhaust as a form of reaction engine. Mechanical energy to power the aircraft's electrical and hydraulic systems can be taken from the turbine shaft, but thrust is produced by expelled exhaust gas.]]

engine in which the combustion of a fuel occurs with an oxidizer in a combustion chamber

system that performs the conversion of heat or thermal energy to mechanical work

type of internal combustion engine

vehicle whose powertrain uses multiple power sources

heat engine driven by combustion in an external source

emitted as a result of the combustion of fuels such as natural gas, gasoline, petrol, biodiesel blends, diesel fuel, fuel oil, or coal

propulsion engine powered by compressed gas

internal combustion engine powered by natural gas

heat engine that operates based on the Carnot cycle

mass ratio

thumb|Cart-mounted engine–generator being used at a construction site

engine construction

form of internal combustion

individual component which makes up the turbine section of a gas turbine or steam turbine.

rotational speed of an engine when it is idling

engine type

gas or liquid used to transfer force, motion, or mechanical or thermal energy

thumb|Dassault Super Mystère showing entry to engine intake duct

type of engine with no crank

external combustion engine using air as the working fluid

heat engine which uses air pressure on one side of a piston and a partial vacuum on the other

thumb|270px|A Honda Civic engine with CVCC

250px|thumb|right|Multifuel automobiles, from several manufacturers, popularly known as "flex" autos, that run on any blend of ethanol (fuel)|ethanol and [[gasoline ]]

Wikimedia list article

Road vehicle emissions control technology

motor vehicle engine

A nanogenerator is a compact device that converts mechanical or thermal energy into electricity, serving to harvest energy for small, wireless autonomous devices. It uses ambient energy sources like solar, wind, thermal differentials, and kinetic energy. Nanogenerators can use ambient background energy in the environment, such as temperature gradients from machinery operation, electromagnetic energy, or even vibrations from motions.

type of drivetrain used by hybrid vehicles

facility used to test engines