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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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265 news items

 
FireEngineering.com
Tue, 18 Nov 2014 13:33:45 -0800

Each of the seven Pierce Arrow XT tiller apparatus for LAFD features a Cummins ISX engine, and an overall length less than 56 feet. The cab includes half height doors and seating for five firefighters. All of the vehicles also sport a 100-foot heavy ...
 
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 ...
 
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 ...
 
Fleet Owner
Fri, 06 Dec 2013 06:43:51 -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 ...
 
PR Web (press release)
Fri, 28 Feb 2014 16:11:15 -0800

New Cummins ISX Engine Rebuild Kit Options. HHP has new engine overhaul rebuild kit options for Cummins ISX engine applications. Rebuild kits are in stock and selling for 30% less than OEM. Share on Twitter Share on Facebook Share on Google+ ...

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
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 ...

Truckinginfo

Truckinginfo
Thu, 08 Aug 2013 17:08:22 -0700

Based on the Cummins ISX-12 heavy-duty diesel engine platform, the 12-liter ISX-12 G natural gas engines operate exclusively on either compressed natural gas or liquefied natural gas and feature ratings up to 400 horsepower and 1,450 pounds-feet of ...
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