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The goal of EGR is thus to reduce NO x production by reducing the combustion temperatures. In modern diesel engines, the EGR gas is usually cooled with a heat exchanger to allow the introduction of a greater mass of recirculated gas. However, uncooled EGR designs do exist; these are often referred to as hot-gas recirculation (HGR).
The Cummins X-series engine is an Inline (Straight)-6 diesel engine produced by Cummins for heavy duty trucks and motorcoaches, replacing the N14 in 2001 when emissions regulations passed by the EPA made the engine obsolete. Originally called the "Signature" series engine, the ISX uses the "Intellect System" (hence the "IS" which is the moniker ...
The 5.9 L Cummins, also known as the "12-Valve" Cummins was the first member of the Cummins B-Series to be used in a light truck vehicle. The 6BT used Bosch fuel systems, injector, and VE rotary pump and P7100 inline injection pumps. Some early 6BTs were supplied with CAV rotary pumps instead, before the Bosch system became the sole standard.
The Cummins M-series engine is a straight-six diesel engine designed and produced by Cummins.It displaces 10.8 litres (659.1 cu in).Introduced as the M11 in 1994, it was built on the previous L10 engine (same 4.921 inches (125.0 mm) cylinder bore, but a longer 5.787 inches (147.0 mm) piston stroke compared to the L10's 5.354 inches (136.0 mm) stroke).
The Navistar VT engine family is a line of diesel engines that was produced by International Truck and Engine (Navistar International) from 2003 to 2016.Developed as the replacement for the T444E V8, the VT V6 and V8 diesels were the smallest diesel engines used in Navistar vehicles, slotted below the DT inline-6 engine family.
To meet this goal, they turned to a newly developed Garrett turbocharger with a variable geometry vane system and installed an EGR valve. Learning from problems with injectors in the previous LB7, GM changed the valve covers to allow access to the injectors without having to remove the valve covers, saving significant labor costs if injector ...
Still using a revised variable geometry turbocharger, it also features an EGR cooler to lower NO X, with a bypass valve to avoid increasing hydrocarbon emissions before the engine reaches operating temperature, and a cylinder head optimized per Nissan's MK (Modulated Kinetics) combustion method. [4] Applications. 1998–2001 Nissan Presage
The changes included the addition of an exhaust gas recirculation (EGR) system, and a variable geometry turbocharger system to improve torque. In September 2004, Detroit Diesel ceased production of the Series 50 heavy duty diesel engine for on highway applications due to emissions standards. It is still available for off-road applications.
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