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In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NO x) emissions reduction technique used in petrol/gasoline, diesel engines and some hydrogen engines. [1] EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders .
A diesel engine that operates below the smoke limit produces a visible exhaust. In modern motor vehicle diesel engines, this condition is generally avoided by burning the fuel in excess air even at full load. The primary products of petroleum fuel combustion in air are carbon dioxide, water, and nitrogen.
Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue [3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water .
1952 Shell Oil film showing the development of the diesel engine from 1877. The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is called a compression-ignition engine (CI engine).
The Detroit Diesel Series 60 is an inline-six 4 stroke diesel engine produced from 1987 to 2011. At that time, it differed from most on-highway engines by using an overhead camshaft and "drive by wire" electronic control. In 1993, it was popular on many USA buses in the 11.1 L (677 cu in) displacement.
Detroit Diesel Series 50; Overview; Manufacturer: Detroit Diesel (cylinder heads cast by John Deere) Also called: Series 50, Series 50 EGR, Series 50G, Series 50 MK-G: Production: 1994–2005 (currently still available for off-road vehicles) Layout; Configuration: Straight-four 4 stroke diesel engine: Displacement: 519 cu in (8.50 L) [1 ...
A NO x adsorber is designed to reduce oxides of nitrogen emitted in the exhaust gas of a lean burn internal combustion engine.Lean burn engines, particularly diesels, present a special challenge to emission control system designers because of the relatively high levels of O 2 (atmospheric oxygen) in the exhaust gas.
In 2007, Caterpillar developed the C13 and C15 Acert engines which used VVT technology to reduce NOx emissions, to avoid the use of EGR after 2002 EPA requirements. [16] [17] In 2010, Mitsubishi developed and started mass production of its 4N13 1.8 L DOHC I4, the world's first passenger car diesel engine that features a variable valve timing ...