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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 regulations 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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393 news items

Yahoo Autos

Yahoo Autos
Fri, 02 Oct 2015 11:11:15 -0700

Both of those issues were on my mind when I turned the key on the 600-horsepower Cummins ISX nestled 40 or so feet behind me in the stern of the 2016 American Eagle motor coach. Some months before, at the New York Auto Show, I'd met with the people ...


Tue, 22 Sep 2015 07:41:12 -0700

... number of KME trucks. All three units feature a 100” KME PredatorTM Severe Service cab and chassis with seating for six, RollTek occupant rollover protection, Zoll road safety system, rear air ride suspension, and Cummins ISX-12 450hp engine.

Firehouse.com (press release) (registration) (blog)

Firehouse.com (press release) (registration) (blog)
Mon, 21 Sep 2015 06:41:15 -0700

The Gastonia, N.C., Fire Department has place in service a heavy rescue with a pump and water tank for fire suppression capabilities. The unit is built on a Spartan Gladiator cab and chassis, powered by a Cummins ISX 500-hp engine. It's also equipped ...

Commercial Carrier Journal

Commercial Carrier Journal
Thu, 10 Sep 2015 13:28:48 -0700

In a never-ending quest to improve efficiencies, today's truck fleets are demanding more from their vehicle and component manufacturers. The low-hanging fruit has already been thoroughly picked over, and carriers are now looking to their suppliers to ...

Fleet Equipment Magazine

Fleet Equipment Magazine
Wed, 01 Apr 2015 09:41:15 -0700

Donaldson Co., manufacturer of filtration systems and parts, announced the company's ground-breaking fuel filtration technology is available for Cummins ISX engines. There are two Donaldson Blue fuel filters available: The DBF5811 for 15.0-liter ISX ...

Firehouse.com (press release) (registration) (blog)

Firehouse.com (press release) (registration) (blog)
Mon, 14 Sep 2015 06:07:30 -0700

Platform 141 is Allendale, Mich., Fire Rescue's new 100-foot, rear-mount aerial built by Smeal Fire Apparatus. It is built on a Spartan Gladiator cab and chassis and powered by a Cummins ISX 600-hp engine and an Allison 4000EVS transmission. To fight ...


Sun, 13 Sep 2015 15:30:00 -0700

If you check out Marty Rasmussen's ride, it isn't hard to see just how much he really does love big rigs. His 2010 Kenworth T908 is a well-cared for unit, as Owner//Driver can assert to after visiting Marty, his partner Lisa and their daughter Alicia ...
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 ...

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