Editing Diesel engine (section)

====1890s====
* 1893: [[Rudolf Diesel]]'s essay titled ''[[Theory and Construction of a Rational Heat Motor]]'' appears.<ref name="Diesel_1893_EN" /><ref name="Diesel_1893_1" />
* 1893: February 21, Diesel and the Maschinenfabrik Augsburg sign a contract that allows Diesel to build a prototype engine.<ref name="Diesel_1913_6" />
* 1893: February 23, Diesel obtains a patent (RP 67207) titled "''Arbeitsverfahren und Ausführungsart für Verbrennungsmaschinen''" (Working Methods and Techniques for Internal Combustion Engines).
* 1893: April 10, Diesel and Krupp sign a contract that allows Diesel to build a prototype engine.<ref name="Diesel_1913_6" />
* 1893: April 24, both Krupp and the Maschinenfabrik Augsburg decide to collaborate and build just a single prototype in Augsburg.<ref name="Diesel_1913_6" /><ref name="Sass_1962_559" />
* 1893: July, the first prototype is completed.<ref name="Diesel_1913_8" />
* 1893: August 10, Diesel injects fuel (petrol) for the first time, resulting in combustion, destroying the [[Indicator diagram|indicator]].<ref name="Diesel_1913_13" />
* 1893: November 30, Diesel applies for a patent (RP 82168) for a modified combustion process. He obtains it on 12 July 1895.<ref name="Diesel_1913_21" /><ref>{{patent|DE|82168|"Verbrennungskraftmaschine mit veränderlicher Dauer der unter wechselndem Überdruck stattfindenden Brennstoffeinführung"}}</ref><ref name="Sass_1962_408" />
* 1894: January 18, after the first prototype was modified to become the second prototype, testing with the second prototype begins.<ref name="Diesel_1913_17" />
* 1894: February 17, The second prototype runs for the first time.<ref name="Diesel_1913_22" />
* 1895: March 30, Diesel applies for a patent (RP 86633) for a starting process with compressed air.<ref name="Diesel_1913_38" />
* 1895: June 26, the second prototype passes brake testing for the first time.<ref name="Tschöke_2018_6" />
* 1895: Diesel applies for a second patent US Patent # 608845<ref name="Diesel_1895_EN" />
* 1895: November 8 – December 20, a series of tests with the second prototype is conducted. In total, 111 operating hours are recorded.<ref name="Sass_1962_466" />
* 1896: April 30, [[Imanuel Lauster]] completes the third and final prototype's drawings.<ref name="Sass_1962_474" />
* 1896: October 6, the third and final prototype engine is completed.<ref name="Diesel_1913_64" />
* 1897: February 1, Diesel's prototype engine is running and finally ready for efficiency testing and production.<ref name="Sass_1962_479" />
* 1897: October 9, [[Adolphus Busch]] licenses rights to the diesel engine for the US and Canada.<ref name="Sass_1962_484" /><ref name="Busch" />
* 1897: 29 October, Rudolf Diesel obtains a patent (DRP 95680) on supercharging the diesel engine.<ref name="Sass_1962_467" />
* 1898: February 1, the Diesel Motoren-Fabrik Actien-Gesellschaft is registered.<ref name="Sass_1962_485" />
* 1898: March, the first commercial diesel engine, rated 2×30&nbsp;PS (2×22&nbsp;kW), is installed in the Kempten plant of the Vereinigte Zündholzfabriken A.G.<ref name="Sass_1962_505" /><ref name="Sass_1962_506" />
* 1898: September 17, the Allgemeine Gesellschaft für Dieselmotoren A.-G. is founded.<ref name="Sass_1962_493" />
* 1899: The first two-stroke diesel engine, invented by [[Hugo Güldner]], is built.<ref name="Mau_1984_7" />