Editing Fuel injection (section)

=== Diesel engines ===
In indirect-injected diesel engines (as well as Akroyd engines), there are two combustion chambers: the main combustion chamber, and a [[Precombustion chamber|pre-chamber]] (also called an ante-chamber)<ref>{{cite book |first=Ellison |last=Hawks |title=How it works and how it's done |publisher=Odhams Press |location=London |year=1939 |page=75}}</ref> that is connected to the main one. The fuel is injected only into the pre-chamber (where it begins to combust), and not directly into the main combustion chamber. Therefore, this principle is called ''indirect injection''. There exist several slightly different indirect injection systems that have similar characteristics.<ref name="von Fersen_273">Olaf von Fersen (ed.): ''Ein Jahrhundert Automobiltechnik. Personenwagen'', VDI-Verlag, Düsseldorf 1986, {{ISBN|978-3-642-95773-4}}. p. 273</ref>

Types of indirect injection used by diesel engines include:
*[[Indirect injection#Precombustion chamber|Precombustion-chamber injection]]<ref name="von Fersen_273" />
*[[Indirect injection#Air cell chamber|Air-cell chamber injection]]<ref name="von Fersen_130" />