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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 reducing NOX. The ISX15 CM2250 and CM2350 has eliminated the injector camshaft 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.



Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Cummins_ISX — Please support Wikipedia.
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235 news items

Transport Topics Online

Transport Topics Online
Mon, 16 Feb 2015 11:29:26 -0800

The SmartAdvantage fuel-economy package, currently offered with the Cummins ISX-15 diesel and Eaton's Fuller Advantage automated manual transmission, is now available on Cummins' ISX-12 diesel, the companies said. The package boosts fuel ...
 
Fleet Owner
Mon, 29 Sep 2014 07:13:36 -0700

A new dual-fuel conversion system from Skygo Fuel Systems has been approved for use with 2007-2009 Cummins ISX engines, the company said. According to Skygo, the EPA has given the green light to the system, which provides up to a 60% displacement ...

Overdrive Magazine

Overdrive Magazine
Mon, 09 Feb 2015 09:44:58 -0800

ABCD Transport owner-operators Andy and Cheryl Anderson, based in Graham, Wash., run van freight in this 2010 Peterbilt 387, powered by a Cummins ISX with an Eaton 10-speed transmission. They're holding their vape pens – battery-and-tank-type ...
 
Seeking Alpha (registration)
Tue, 17 Feb 2015 16:22:30 -0800

Next up, we have secured the Cummins ISX truck. We will be sending that to our engine dyno to start testing here in the end of February. And then we will be putting two more engines, Navistar and PACCAR engines probably in the next 60 days. Because of ...
 
Truckinginfo
Tue, 11 Feb 2014 07:32:12 -0800

My truck has 631000 miles on it already and has a cummins ISX; is there any way to find out if the truck went through the proper mantainance when it comes to a REGEN issue? Thanks in advance for any advice. Jesus Cruz. 7. Cliff Downing [ March 01, 2014 ...

Commercial Carrier Journal

Truckinginfo
Tue, 30 Apr 2013 10:06:00 -0700

Navistar announced in July 2012 that it would discontinue its EGR-only approach and bring SCR-equipped Cummins ISX engines back into databooks by the spring of 2013, reuniting the ISX and the ProStar+. Tom Smith, director of ISX/SCR integration at ...
 
Fleet Owner
Fri, 06 Dec 2013 06:37:30 -0800

The line includes replacement filters for fuel, air, lube and liquid and are specifically designed to meet performance requirements for each application, Donaldson said. Donaldson replacement filters are manufactured to the same quality standards as ...
 
Fleet Owner
Wed, 30 Oct 2013 06:41:11 -0700

MHC Truck Leasing is delivering 10 new natural gas trucks (CNG) with the Cummins ISX 12G engine to Valley Proteins, a company that renders and recycles animal byproduct into renewable resources. MHC said the Kenworth T800 day cabs will reduce ...
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