This category is for Diesel cycle internal combustion engines, not Otto cycle engines. Diesel engines mostly use reciprocating piston layouts, but rotary types have been designed, built, and run. All two- and four-cycle engines can use Diesel or Otto cycles, and the four stages of operation and combustion (compression, ignition, expansion, exhaust) occur sequentially in time, in a common spatial area and part of the engine, a combustion chamber, usually via a piston. In Diesel engines, compression is higher and causes auto ignition, so Diesels are also called compression ignition engines, while Ottos are called spark ignition engines.
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- How Diesel Engines Work Explains the technical basics of Diesel engines. Includes useful animations and pictures. [HowStuffWorks]
- Dieselmann's Page Help and advice on Ford and Navistar (IH) diesel engines for owners and technicians. Includes service advice and checklist, parts, symptoms, repair tips, glossary and links.
- Wikipedia - Diesel Engine Free encyclopedia article covers diesel engine technology and applications. Addresses technical and historical background, types and characteristics, support systems and parts.
- Diesel Technology Forum Organization of diesel engine manufacturers, fuel suppliers, exhaust after-treatment manufacturers. Includes comprehensive information on the technology and its applications.
- Clean Diesel Fuel Alliance Information Center Offers news and information concerning the move towards cleaner-burning diesel fuel in the United States. Covers frequently-asked questions, benefits of cleaner fuel, and its effects on engines.
- Clean Air Fleets: Technologies Provides information on technologies to improve diesel engines including idle reduction and emissions control.