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Jul 12, 2018 - 6 minute read

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How to Bypass the DPF Filter on Cummins Engines?

DPF Filter on Cummins Engines
(Last Updated On: October 2, 2020)

About Cummins Inc

Cummins Inc is a Fortune 500 company that was founded in 1919. Their headquarters are located in Columbus, Indiana in the United States of America.

It is listed on the New York Stock Exchange (NYSE) as CMI. As a result, they employ bright minds to manufacture their DPF filter systems.

Cummins is responsible for designing, manufacturing, and distribution of engines, filtration systems as well as power generating products.

It also provides service for fuel systems, air handling, emission control and electrical power generators.

Bypass the DPF Filter on Cummins Engines

Bypass the DPF Filter on Cummins Engines

Hailed as a global leader of the power industry, Cummins has shown consistent growth over the years.

In fact, it managed to generate sales revenue of a whopping $20.7 billion US dollars in 2017 alone. The company has it’s presence across 190 countries and serves a network of 6,000 dealers.

Company’s Business Units

The company’s business units are divided  into:

Cummins Engine

The engine business is the most critical part of Cummins. It features aftermarket support for mid-range, heavy-duty as well as high-horsepower engines. They cater a whole product line of both natural gas and diesel-powered generators.

These engines are designed in both on and off-road variants. Their product line serves not only the average consumer but also provides equipment to the construction, mining, marine, oil and gas industries.

They are also renowned for developing military equipment for the government.

Cummins Power Systems

Previously called Cummins Power Generation, this business unit is responsible for the development of Alternators, Commercial Power Systems, Automatic Transfer Switches, Consumer System, Engines and more.

They provide standby power, power distribution as well as backup power services globally.

This unit is a result of a merger between the High-horsepower division and the Power Generation Unit of Cummins.

Cummins Components

The components business consists of solutions aimed at Emission, Filtration, Fuel systems, Electronics as well as Turbochargers.

The market served by this business unit consists of medium and heavy-duty commercial Diesel engines.

Cummins Distribution

This unit is a compilation of 17 distributors and ten joint ventures. They serve 90 countries, providing after-sales services and spare parts. Cummins has multiple subsidiaries to its businesses.

Cummins Turbo Technologies

This is a result of the acquisition of The Holset Engineering Company in 1973. The official re-branding took place in 2006.

Cummins Power Systems

Acquired in 1986, Onan was rebranded as Cummins Power Systems in 1992. It’s mainly used in modern versions of RV, marine, commercial and portable engine-run generators. Cummins Emission Solutions To meet the need of evolving emission standards for the future, Cummins purchased Nelson Industries in 1999.

Cummins prides itself as an advocate for a cleaner and healthier environment. Several of their products and technologies are dedicated to reducing emissions globally such as the particulate filter.

Bypass the DPF Filter on Cummins Engines

Bypass the DPF Filter on Cummins Engines

Their employees use their knowledge and skills to work towards reducing their environmental footprint both inside their facilities as well as outdoors.

They are also committed to increasing the quality of education among students and is working to bridge the gaps in our education systems so that the workforce of the future is ably-equipped to handle the challenges of tomorrow.

What is DPF?

DPF stands for Diesel Particulate Filter. It is a vital part of a diesel exhaust that is responsible for the collection of soot and other PM 2.5 particles.

This filter captures these harmful particles and prevents them from being released into the environment.

What is DPF

What is DPF

A DPF filter is necessary because it reduced the pollutants in the air. It also helps prevent the respiratory and heart diseases that can be caused by these particles in humans.

An increasing number of truck enthusiasts advocate the removal of DPF from their cars.

Here are the so-called advantages of DPF deleting:

  • Better fuel economy
  • Lowered back pressure
  • Increased horsepower
  • Better engine lifetime

Though the benefits are compelling, they come at jeopardizing the health of those severely at risks such as elders and the disabled.

On top of that, most cities have made it illegal to remove the DPF from your vehicle. This is done to reduce the overall pollution and global warming by governments.

Regular maintenance of the DPF is essential, as a clogged filter will damage the engine of your vehicle over-time.

In most cases, the cleaning of the filter is achieved through an automatic process called regeneration. In this process, the soot and particles are oxidized by the exhaust, and this effectively removes them from the DPF.

Cummins ISX offers incredibly efficient filters for your vehicles.

The standard Cummins Particulate Filter features four main components

  • Inlet
  • Diesel Oxidation Catalyst (DOC)
  • Diesel Particulate Filter (DPF)
  • Outlet

When the vehicle is in operation, the generated exhaust flows from the engine towards the particulate filter. Inside this filter, the soot and PM 2.5 particles go through the DOC and reach the DPF.

The DPF captures these particles on its walls, which can finally be safely oxidized to clean out the DPF automatically through regeneration.

Under normal operating conditions, sufficient temperature is maintained inside the exhaust. This allows the DPF to regenerate continuously.

This process is called passive regeneration, and it helps clean out the exhaust system.

There are rare instances where passive regeneration cannot usually be achieved due to lack of required exhaust temperatures.

In such a case, active regeneration is required as the collection of soot becomes faster than it can be oxidized passively. One way to achieve active regeneration is by injecting a small amount of diesel into the exhaust stream.

Oxidation of the additional combustible product helps generate the needed temperature to regenerate the DPF correctly.

This process is called after-treatment injection. It also requires the engine to change it’s mode of operation for this treatment to work. The Engine Control Module (ECM) detects that a procedure has been done and modifies the engine operation accordingly.

Another way to achieve active-regeneration is when the vehicle is stationary, and the engine is powered off.

Though this process is necessary for increasingly limited situations. It’s a good thing that in case something is not working right, the consumer has a way to remedy the problem.

Cummins designs it’s engines in a way so that the passive regeneration can be maximized without causing any effects on the vehicle’s performance.

The company recommends vehicle owners to get their DPF serviced every 200,000 miles.

This will significantly reduce any downtime and will save the vehicle from damaged components, which are incredibly costly to replace, the repairing costs may go up to four figures in extreme cases.

Final Words

In conclusion, avoid the bypass DPF filter on Cummins Engines and DO NOT DPF DELETE!