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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. Cummins also produced a 650 hp and 1950 lbs ft version for the RV market. It has proven to be unreliable and Cummins has issued several "fixes" for it but no warranty coverage extension.

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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438 news items

 
StreetInsider.com
Thu, 28 Apr 2016 03:30:00 -0700

Press photo/caption: WABCO signed a new long-term agreement with Cummins Inc. to manufacture and supply high-performance air-compressor technology globally. Pictured here is a WABCO air compressor for Cummins' ISX diesel engine for heavy-duty ...
 
Commercial Carrier Journal
Tue, 19 Apr 2016 08:59:24 -0700

As for return on investment on the secondary market, ATD data shows a Freightliner equipped with a DD15 and an AMT commanding 6.8 percent fewer dollars than a similarly spec'd 10-speed manual; a Freightliner with a Cummins ISX bringing in 4.8 percent ...

Truck News

Truck News
Tue, 10 Nov 2015 10:22:30 -0800

It was off to Marshall, Mich. last week, for a joint press event hosted by Eaton and Cummins. There was lots to see and drive at this one. Among the highlights was a 2017 Cummins ISX15 engine. Two of them, actually. One had the SmartAdvantage small ...

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

MassTransitMag.com (press release) (registration) (blog)
Mon, 25 Apr 2016 11:45:00 -0700

The new luxury coaches are powered by a 425 HP Cummins ISX engine coupled to an Allison B500 6 speed transmission and feature Van Hool safety features including 3 point seatbelts, backup camera, lane departure warning, antilock brakes, Smartwave ...

NGT News

NGT News
Wed, 14 Oct 2015 08:33:45 -0700

American Power Group Inc. (APG) has received new intermediate useful life (IUL) approvals from the U.S. Environmental Protection Agency (EPA) for its dual-fuel natural gas conversion system on Cummins ISX 14.9L diesel engines. According to the ...
 
SYS-CON Media (press release)
Thu, 28 Apr 2016 03:30:00 -0700

Press photo/caption: WABCO signed a new long-term agreement with Cummins Inc. to manufacture and supply high-performance air-compressor technology globally. Pictured here is a WABCO air compressor for Cummins' ISX diesel engine for heavy-duty ...

Fleet Equipment Magazine

Fleet Equipment Magazine
Wed, 01 Apr 2015 09:45:59 -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 ...
 
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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