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The Cummins ISX is an Inline (Straight)-6 diesel engine produced by Cummins for heavy duty trucks and motorcoaches, replacing the N14 in 2001 when emissions laws passed by the EPA made the engine obsolete. Originally called the "Signature" series engine, the ISX uses the "Interact System" (hence the "IS" which is the moniker for the full authority, on highway fuel system Cummins pioneered) to further improve the engine. This engine is widely used in on highway and vocational trucks and is available in power ranging from 430 hp all the way to 620 hp 2050 ft/lbs. The QSX is the off-highway version of the ISX with the Q standing for Quantum. The QSX is used for industrial, marine, oil & gas and other off-highway applications.

Until 2010 this engine was a dual overhead cam design with one cam actuating the injectors and the other the valve train. This injection system is known as HPI (high pressure injection) where the injectors are cam-actuated to create injection pressure. The fuel system uses an Integrated Fuel System Module (IFSM) with a lift pump, gear pump, pressure regulators, shutoff valve, metering and timing actuators to deliver fuel to the injectors. It has a one piece valve cover that is either plastic or on older models a chrome plated steel cover otherwise known as the Signature 600 or ISX CM570.

In 2002, the ISX CM870 brought cooled Exhaust Gas Recirculation (EGR) which takes exhaust gas and recirculates it back into the intake of the engine lowering the combustion chamber temperatures limiting the formation of NOx.

In 2008, Cummins unveiled the ISX CM871, this engine featured a Diesel Particulate Filter (DPF) which trapped the particulate matter or "soot" produced in the engine. With the help of the Diesel Oxidation Catalyst (DOC) the soot trapped in the DPF is oxidized and turned to ash during a process called regeneration.

The current EPA 2010 version known as ISX15 CM2250 features enhanced Exhaust Gas Recirculation, Diesel Particulate Filter and Selective Catalytic Reduction (SCR), also known as Urea Injection. SCR consists of a Diesel Exhaust Fluid (DEF - composed of urea and water) injection system: holding tank, pump, controller, and injector and an SCR catalyst brick. DEF is heated, pumped and injected into a decomposition tube which then reacts with the exhaust in the SCR catalyst to reduce NOx. The ISX15 repurposes the injector camshaft to actuate the Jacobs Intebrake, due to the advent of the common rail fuel system in which the fuel is pressurized from a high pressure, multiple piston pump, transferred through tubing to a rail where fuel is stored under extremely high pressures up to 35,000 psi.

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5 news items


Reuters UK
Tue, 19 Aug 2014 04:02:48 -0700

LONDON Aug 19 (Reuters) - Cheap natural gas is starting to revolutionise traffic on U.S. roads, cutting bills for some of the country's heaviest fuel users while reducing carbon emissions and other pollution. The revolution is still in its very early ...
Sat, 23 Aug 2014 23:00:00 -0700

Leading truck manufacturers including Freightliner International Kenworth Peterbilt Mack and Volvo all offer natural gas trucks using Cummins' ISX 12G engine which one major fuel supplier hopes will be a "game changer" for the industry. Gas-fueled ...

Saudi Gazette

Saudi Gazette
Thu, 21 Aug 2014 14:37:01 -0700

Las Malvinas natural gas plant, part of the Camisea project, is pictured before a ceremony to mark the 10th anniversary of the plant's operations, at Cuzco in the Amazon jungle August 4, 2014. The Camisea Consortium, led by Argentine energy company ...

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T21 Noticias de Transporte y Logística
Wed, 20 Aug 2014 12:52:30 -0700

La firma transportista Gran Portuaria adquirió 12 tractocamiones Freightliner, 10 del modelo Cascadia y dos más del Columbia. Con ello, suma una flota 110 de vehículos de largo recorrido, dentro de 200 unidades que compone su parque vehicular.

Info Transportes On Line

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Tue, 26 Aug 2014 11:22:30 -0700

La compañía de logística integral y transporte, integra por vez primera unidades del modelo Cascadia, disponibles con motores Detroit DD15 y Cummins ISX; un sistema de enfriamiento más eficiente; aerodinámica que permite mejores rendimientos al ...

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