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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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270 news items


Fri, 28 Aug 2015 11:11:15 -0700

This day-cab truck runs with a Cummins ISX diesel paired to an Eaton Fuller 10-speed tranny turning 275/80R22.5 rubber riding with a 203-inch wheelbase. If you can't make it up to this sale, Steffes is also holding consignment auctions in Boone, Iowa, ...

Fleet Owner

Fleet Owner
Fri, 28 Aug 2015 06:07:30 -0700

The 122SD with either transmission is available with Detroit DD13, DD15, DD16, and Cummins ISX heavy-duty engines. “Our severe-duty customers have demanding jobs that require powerful, heavy-duty solutions that won't compromise productivity,” said ...


Thu, 27 Aug 2015 13:37:30 -0700

Both automatic transmissions are available on trucks powered by Detroit DD13, DD15 and DD16 and Cummins ISX heavy-duty engines. “Our severe-duty customers have demanding jobs that require powerful, heavy-duty solutions that won't compromise ...

Transport Topics Online

Transport Topics Online
Thu, 27 Aug 2015 05:56:15 -0700

Kenworth and Peterbilt also use the Cummins ISX 15 in their trucks. Five days after the Kenan announcement, Kenworth also said it installed its 50,000th MX in a T680 day cab for UPS Inc. The Paccar MX-13 engine resides in a new, fuel-efficient Kenworth ...


Fri, 21 Aug 2015 01:05:33 -0700

Underpinned by Spartan's K3 tag-axle chassis and powered by a 600 hp Cummins ISX diesel engine, it has all the amenities of a home. There are lots of exterior graphics and paints to choose from, while customers get four options each for the wood color ...

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 ...
Satellite PR News (press release)
Fri, 28 Aug 2015 08:11:15 -0700

Spartan additionally offers their 103′ Aerial Ladder truck at the show, which is available for immediate delivery, and includes the following industry-leading performance features:Spartan Gladiator 99″ MFD with 10″ Raised RoofCummins ISX 15 500 ...


Wed, 26 Aug 2015 18:07:30 -0700

He specified a Cummins ISX engine rated at 550hp (400kW) with selective catalytic reduction (SCR) emissions control – ie using AdBlue. The bunk is a big 50-incher. "It's really good," Liam says of his new truck. "It's really comfortable, good to sleep ...

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