Editing Diesel engine (section)

====1920s====
[[File:Fairbanks Morse model 32.jpg|thumb|Fairbanks Morse model 32]]
* 1923: At the Königsberg DLG exhibition, the first agricultural tractor with a diesel engine, the prototype Benz-Sendling S6, is presented.<ref name="Agritechnica_2017" />{{Better source needed|date=February 2019}}
* 1923: December 15, the first [[lorry]] with a direct-injected diesel engine is tested by MAN. The same year, Benz builds a lorry with a pre-combustion chamber injected diesel engine.<ref name="MAN_1991_XI" />
* 1923: The first two-stroke diesel engine with counterflow scavenging appears.<ref name="Mau_1984_17" />
* 1924: [[Fairbanks-Morse]] introduces the two-stroke Y-VA (later renamed to Model 32).<ref name="Oldmachinepress_2012" />
* 1925: Sendling starts mass-producing a diesel-powered agricultural tractor.<ref name="Sass_1962_644" />
* 1927: [[Robert Bosch GmbH|Bosch]] introduces the first inline injection pump for motor vehicle diesel engines.<ref name="Reif_2014_31" />
* 1929: The first passenger car with a diesel engine appears. Its engine is an Otto engine modified to use the diesel principle and Bosch's injection pump. Several other diesel car prototypes follow.<ref name="vFersen_1986_274" />