Menu
The Cummins N-14 is a great engine; quite possibly the best Cummins engine ever produced. These engines are the stuff dreams are made of if you’re an old school guy looking for reliability. No doubt, the N14 is part of “1,000,000 mile club”. The engine features the best of engineering fundamentals mixed with one of the first electronic control system. First designed in the late 1980s it was sent into full production in 1991. The N14 engine is the follow up to the vastly popular Cummins 855 Big Cam which was produced 1976-1985. Cummins listened to it customers and designed a more powerful version of the 855 while maintaining a similar profile and bore/stroke architecture. Overall, the biggest structural difference between the 855 and N14 is the air-to-air cooling system changes but both engines are very similar.
The N-14 was produced until 2001 and saw many changes over its 10+ year run for Cummins. The most radical change over the 855 was the incorporation of the electronic control module (ECM). Detroit Diesel rolled out the first commercial electronic diesel engine in 1987 with its ground breaking Series 60 Engine and Cummins followed suit. With the advent of the first EPA Tier emissions regulations in 1994 the future of diesel engines was going to be electronic diagnostics. The N14 Celect was the first Cummins engine to feature an electronic injection system. The Celect fuel system produces systematic pressure throughout each injection cycle unlike the common rail fuel system of the 855, or older M11 or L10 models. Albeit the injectors are still cam actuated the ECM controls the metered flow of fuel to the injectors. In 1997 Cummins introduced the N14 Celect Plus which further fine-tuned the ECM to control many more custom parameters of the fuel system. In addition of an ECM the N14 was designed for emissions purposes to consume much less oil. The N14 diesel was engineered in a way where oil flow is much more uniform thus requiring the engine to consume about 20%-30% less oil than the Cummins 855. Engineers at Cummins also came up with new pistons that positioned the top ring much closer to the uppermost part of the piston. This new design reduced a large open space between the ring and the piston liner. By utilizing this space the combustion chamber moved closer to the top ring which meant the oil got much hotter and burned off more completely. In addition to internal changes, engineers also developed an API CF-4 and API CG-4 oilfor the N14 that was much more thermally stable and easier to breakdown on a molecular level. Cummins N14 Engine History
Cummins Engine Serial Number Format Cummins engine serial numbers look more like a classic serial number than do. Cummins ESN’s are eight digits long and are composed only of numbers. They go in a numerical sequence, based on which engine came first off the assembly line. CPL, Data Plate, Data Tag, Datatag, Engine Horsepower, Engine Model, Engine Serial Number, ESN, Find Serial Number What We Do Seaboard Marine delivers “Guaranteed Better Than Factory” Performance, Parts, Design, and Engineering for Cummins and other Marine Diesel applications. M 11 CELECT plus engine serial number 34931879. N14 CELECT Plus engine serial number 11936821. ISX engine serial number 79018598. ISM engine serial number 35120760. If you could get a part number for a water temperature sensor for these engines,it will solve my question and allow me to get the correct part from the engineer at evans coolant.
Cummins N-14 Injector Problems
FINDING A CUMMINS ENGINE SERIAL NUMBER In general, Cummins Engine Serial Number (ESN) consist of eight digits, e.g. Cummins Engine Serial Number (ESN) format consists of eight digits comprised of all numbers. There are various places you can look for your engine's ESN. Your owner's manual is a good place to s. Page 2 Foreword This manual contains complete rebuild specifications and information for the N14 model engines, and all asso- ciated components manufactured by Cummins Engine Company, Inc. A listing of accessory and component suppliers’ addresses and telephone numbers is located in Section C. Suppliers can be contacted directly for any information not covered in this manual.
For all of the great aspects of the Cummins N14 its Achilles Heel has always been the injectors. The L10, M11 and N14 all have problems with injector failures and the surrounding electronics. The fuel system’s main components consists of the injectors, injector wiring harness and the ECM. A common occurrence will happen when, for example, when the ECM shows a 111 or 343 code in an N-14 Celect Plus model. This means the ECM isn’t grounded to the injector. Usually this starts out with only 1 injector shown to be malfunctioning but can quickly spread to others. If this happens you immediately want to shut down the engine.
These early electronic engines offered no protection against the wiring harness shortening out. There are 6 injector driver connections on the ECM which are attached to the injectors via a wiring harness. If an injector goes bad it is advised to pull out the wiring from the injector and replace immediately before the faulty wire burns up the ECM motherboard. Usually if you unplug # 1, 2, 3, or 4 injector drivers in time you can save the ECM/injectors. The wiring harnesses are known to have problems and are very expensive to replace. Another issue with the N14 ECM is a faulty fuel solenoid. The solenoid is situated on the bottom of the ECM. If the solenoid shorts it will heat up the ECM slowly and can then destroy the entire fuel solenoid circuit, memory chip and the injector timing chip. Usually the solenoid gets so hot it melts the solder on the chips. For a 50 pin connection all it takes is one pin to loosen from the heat to destroy the ECM. It is recommended that drivers carry 1-2 extra injectors in the truck in case one goes out. Usually they go out in pairs which makes sense to carry 2 at all times. Other common injector issues with the N-14 include:• Injectors overfill with fuel and it overfills the crankcase • Injector O-Rings will leak • Misfires occurring due to a clogged filter screen on top of the injector pump• Injector cup failures allow water in the fuel • Over revving can cause scoring on the injector plunger barrel • Oil Coolers are prone to clogging • Fuel lines prone to fraying allowing debris into the injector The type of fuel and additives used with the N-14 make a world of difference. Many fleet operators use Lucas oil additives or Automatic Transmission Fluid (ATF) Liquid Moly solutions. ATF additives prevent oil loss, helps protect and regenerate seals and rings, cleans out oil sludge, improves steering performance and helps protect the engine during shifting. Most operators will put in 1 quart of ATF per 100 gallons of fuel. However it is important to note ATF Fluid is red in nature and will show up as off-road fuel at most DOT Weight Stations. You could end up with some pretty big fines if you don’t have the proper documentation. Other preventative measures with the N-14 include using an alcohol based additive to kill off algae from newer blends of fuel. The algae in these various blends tends to eat through the older OEM fuel lines. If you use winter and summer blend diesel fuels make sure to use blends from a reputable supplier instead of some discount brand as the N-14 doesn't do well with overly chemically blended fuels; the basic stuff will do just fine. Even though the N14 has some injector issues make no mistake the N14 is a workhorse. This diesel enginehas the power to get the job done, is easy to maintain and will last a long time. It is recommended that the oil filter, fuel filter and coolant filters all be replaced every 11,500 miles. The N-14 does not do well with cheaper filters that don’t further remove particulate matter. The early Cummins ISB series engines, (5.9 L and 6.7 L) were known to ship with cheaper less efficient filters which were also used in the early N-14 engines as well. Fleetguard or Donaldson makes a fine aftermarket filter for newer replacement purposes. Other than the fuel filters it is recommended that the valves be adjusted every 125,000 miles but a major overall should not be needed for 500,000 – 1,000,000 miles. N-14 Engine Specs
The N-14 comes in the models the: N-14, N-14 Celect and N-14 Celect Plus.
• Displacement: 14.0 Liter • Bore: 5.5”, 140 mm • Stroke: 6.0”, 152 mm • Cylinders: 6 In-Line • Fuel System: PT • Horsepower: 310 - 525 HP @ 2100 RPM, 360 HP @ 1800 RPM Marine • Power Rating: 231 - 391 kW standard, 269 kW Marine • Aspiration: Turbocharged / Waterjacket Aftercooled / Naturally Aspirated Options • Rating Type: Continuous • Dry Weight: 2800 lbs., 1300 kg • Dimensions: Length 59 in, 1496 mm, Width 33 in, 854 mm, Height 51 in, 1293 mm. • Compression Ratio: 17:1 • Injector Firing Order: 1-5-3-6-2-4 • Valve Timing: A Mark Cylinder 1-6, B Mark Cylinder 5-2, C Mark Cylinder 3-4 • Clearances: Intake Valves: 14 thousands, Exhaust Valves: 27 thousands • Emissions Certifications: Meets NOx requirements International Maritime Organization (IMO), Maripol 73/78 Annex VI Regulation 13 and the United States Environmental Protection Agency. Article CategoriesCummins,Diesel Articles,Diesel Engines,Diesel Engine Problems and Repairs,Diesel Engine Technology,Diesel History,Environmental Impact of Diesel Engines,EPA Tier Regulations,
The Cummins ISX is an Inline (Straight)-6diesel 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 lb-ft. 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 lb-ft version for the RV market.
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.
Age of mythology for mac. 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. In motorhomes this was available as a 600 or 650 HP version.
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.
Emissions Control[edit]
The Cummins ISX diesel engine can be run in a dual fuel configuration, meaning it can properly operate on diesel fuel and natural gas. The burning of a natural gas alternative preserves diesel thermal efficiencies. The more efficient engine can produce less emissions in turn. The ISX can achieve this by altering ignition delay and injection timing. By examining the start of combustion (SOC), the engine's computer is able to employ a predictive ignition delay correlation. The predictive characteristics of the engine maximize both efficiency and useful power for the given fuel source. Compensations are made for the natural gas so that the power band and operating range are still functional for customers, while reducing emissions[1]. Testing has also been done with the Cummins ISX by the EPA for natural gas usage that yielded results of major NOx emissions reduction. The configuration boasts ninety percent lower NOx emissions than the current EPA standard. This makes the Cummins ISX that burns natural gas one of the cleanest running diesel engines in the world[2]. The ISX also utilizes a DPF, or diesel particulate filter, required by the EPA. The DPF filters out the solid particles in the engine's exhaust, reducing tailpipe emissions. The DPF does have to be regularly maintained, however, because of its intricate design. The emissions control system will institute a filter regeneration which burns off the particulates. Any in-combustibles found in lubrication additives will remain in the DPF, which can cause problems with back pressure and efficiency. This means the DPF needs to be regularly removed and cleaned for the Cummins ISX. An ash-less oil could mean that cleaning would be unnecessary, but can inhibit lubrication properties. A zero-phosphorus oil has been studied and found to be ideal for DPF systems and lubrication. The oil displays passing results for both piston deposits and oil consumption, which means the DPF system would be optimized with use of zero-phosphorus, ultra low sulfur oil[3]. The Cummins ISX also utilized DEF, or diesel exhaust fluid, in later models when EPA requirements changed. DEF is system of injected urea that reduces the emissions of a diesel engine. The Cummins ISX is required to have inhibitors in place for certain failures of the DEF system. When the DEF tank is low or empty, the ISX cuts power by twenty five percent. Power cuts and driver warnings are also used when the DEF system has been tampered with or is not functioning properly. Cummins has corrected several malfunctions and conducted customer based research of several million miles of on road use of the Cummins ISX to make the DEF system as functional as possible. The system is also required to de-rate power given any problems in order to reduce emissions to an absolute minimum[4].
Technology[edit]
In early ISX engines an anti backlash gear train is used. The anti backlash gears allow the engine to operate with minimal gear rattle. Cummins uses a gear train in the front of the engine which is inherently noisy. The anti backlash gearing makes the engine less noisy due to the reduced rattle while in operation. The anti backlash gear train comes at a cost of efficiency. The Cummins ISX 15 model equipped with anti backlash gearing suffers a friction loss. The gears must overcome more friction throughout their moving range than a standard gear. A standard gear in a Cummins ISX 15 needs to overcome 0.75 Newton meters of force, while the anti backlash gearing needs to overcome approximately 5 Newton meters of force[5].
Cummins N14 Engines For SaleReferences[edit]
N14 Cummins Engine Reviews
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Cummins_ISX&oldid=950193629'
Comments are closed.
|
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |