To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.

From Wikipedia, the free encyclopedia

Side view of a circa-1970 AMC 232 automotive engine
Side view of a circa-1970 AMC 232 automotive engine

A petrol engine (gasoline engine in American English) is an internal combustion engine designed to run on petrol (gasoline). Petrol engines can often be adapted to also run on fuels such as liquefied petroleum gas and ethanol blends (such as E10 and E85).

Most petrol engines use spark ignition, unlike diesel engines which typically use compression ignition. Another key difference to diesel engines is that petrol engines typically have a lower compression ratio.

YouTube Encyclopedic

  • 1/5
    12 645 852
    747 401
    5 184 780
    212 662
    52 471
  • Petrol (Gasoline) Engine vs Diesel Engine
  • How Four Stroke Petrol Engine Works
  • Making a 2.4cc Petrol (Gasoline) Engine
  • Tiny WORKING 4-Stroke Petrol Engine
  • Gasoline (Petrol) vs Diesel: Which one is better? A Beginner’s Guide



Thermodynamic cycle

Animation of an Otto cycle engine
Animation of an Otto cycle engine

Most petrol engines use either the four-stroke Otto cycle or the two-stroke cycle.[1][2][3] Petrol engines have also been produced using the Miller cycle and Atkinson cycle.[4][5][6][7]


Most petrol-powered piston engines are straight engines or V engines. However, flat engines, W engines and other layouts are sometimes used.

Wankel engines are classified by the number of rotors used.

Compression ratio


Petrol engines are either air-cooled or water-cooled.


Petrol engines use spark ignition. High voltage current for the spark may be provided by a magneto or an ignition coil. In modern car engines the ignition timing is managed by an electronic Engine Control Unit.

Power output and efficiency

The power output of small- and medium-sized petrol engines (along with equivalent engines using other fuels) is usually measured in kilowatts or horsepower.

Typically, petrol engines have a thermodynamic efficiency of about 20% (approximately half that of some diesel engines).[8]


Applications of petrol engines include automobiles, motorcycles, aircraft, motorboats and small engines (such as lawn mowers, chainsaws and portable generators).


The first practical petrol engine was built in 1876 in Germany by Nicolaus August Otto,[9] although there had been earlier attempts by Étienne Lenoir in 1860,[10]: p15  Siegfried Marcus in 1864[10]: p79  and George Brayton in 1876.[10]: pp413–414 [11]

See also


  1. ^ "What is Otto Cycle - Complete Explaintion on P-v & T-s Diagram". The Engineers Post. 10 September 2019. Retrieved 14 August 2022.
  2. ^ "What is Two Stroke Engine?- Types, And Working". Engineering Choice. 12 November 2020. Retrieved 14 August 2022.
  3. ^ "Two Stroke Engine - Internal Combustion Engines (IC) - Automobile Magazine". MotorTrend. 16 December 2009. Retrieved 14 August 2022.
  4. ^ "How does a Miller-cycle engine work?". HowStuffWorks. 1 April 2000. Retrieved 14 August 2022.
  5. ^ "Mazda 2.3L Miller-cycle DOHC V-6". WardsAuto. 1 January 1998. Retrieved 14 August 2022.
  6. ^ "Why does Toyota use Atkinson cycle engines?". Toyota UK Magazine. 14 January 2015. Retrieved 14 August 2022.
  7. ^ "Engines Exposed: Atkinson Cycle Engines". MotorBiscuit. 28 August 2016. Retrieved 14 August 2022.
  8. ^ "Toyota Gasoline Engine Achieves Thermal Efficiency Of 38 Percent". Green Car Reports. Retrieved 2017-10-07.
  9. ^ CA 6479  "Gas Motor Engine"
  10. ^ a b c Friedrich Sass (1962). Geschichte des deutschen Verbrennungsmotorenbaus von 1860 bis 1918. Berlin/Heidelberg: Springer. ISBN 978-3-662-11843-6.
  11. ^ "Who Invented the Car?".
This page was last edited on 25 February 2023, at 16:00
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.