![]() ![]() There have been numerous reports of DPF regeneration being the possible catalyst for engine fires, and there has even been a DPF fire responsible for burning down more than 5,000 acres.Īround the globe, automotive manufacturers are facing lawsuits. With a reported price tag of $20,000 for the DPF to be installed, it is an astonishing price to pay for a system that proved to be unreliable and unpredictable. This is not the first recorded incident with suspected DPF origins.Ī major DPF manufacturer closed its doors after numerous fires and recalls stemming from their DPF systems. He was stunned from the incident, reflecting on the close call and how he could have easily been in the cab sleeping when this fire started. ![]() His suspicions are that the truck fire started during the DPF regeneration process. Walking back, he looked up to his beloved truck in flames. Moments before it erupted into flames, Daniels pulled into a truck stop to use the restroom. In 2016, Keith Daniels watched his 2009 Peterbilt truck burn to the frame in only eight minutes. ![]() The truckers claim that the so-called pollution preventer is causing dangerous truck fires.Īpproximately one million trucks in the state of California have a DPF, and one of those trucks belonged to Keith Daniels. The Potential for DPF FailuresĭPF systems have come under fire by a group of California trucking companies after filing a lawsuit against the California Air Resources Board. Regeneration can also be deactivated should the vehicle operator be in a situation where a prolonged high temperature regeneration could be potentially dangerous. Other types of DPF regenerations can be activated through programmed mileage counters (i.e. ![]() During this regeneration, the DPF temperature is raised to roughly 1,000° F. As the DPF experiences this temperature increase, PM is oxidized from the filter. This PCM command usually comes from an input that senses the excess back pressure in the DPF from filter blockage, letting the PCM know that a PM burn-off is needed. This hot exhaust is able to heat up the DPF, burning off the trapped PM in the filter.Īctive regeneration is activated by a PCM command that increases the amount of fuel, allowing the DPF to experience higher exhaust temperatures. Passive regeneration occurs when an engine operates at significant speed, passing heat into the exhaust system. There are two different types of regeneration, passive and active. The computer is made aware that regeneration is necessary, and the engine is able to heat up the DPF to burn off the PM, cleaning the filter. This is when the DPF system enters regeneration mode, also known as “regen”. Over time, these filters do need to be cleaned of the captured particulate matter (PM). By capturing particulates, these filters are able to keep a majority of harmful emissions from ever entering the air. DPFs are typically installed close to the engine side of the exhaust system. Diesel Particulate Filter and RegenerationĭPFs work to reduce exhaust emissions through capturing exhaust particulates in the filter within the canister. With the EPA working alongside diesel engine manufacturers, these bodies were able to focus on reducing NOx and PM in exhaust emissions through using these DPF systems. This change would begin with the 2007 model year, requiring 100 percent of on-road diesel vehicles to use a DPF to reduce exhaust emissions.Īiming to reduce the particulate matter, NOx, and other harmful emissions of the automotive exhaust systems, manufacturers were required to develop and implement a change in the exhaust management systems of their vehicles.īecause of the known health concerns that come with automotive pollutants, the EU & EPA’s rulemaking regulated the particulate matter (PM) and NOx emissions in on-road vehicles, with the purpose of reducing the impact exhaust emissions has on human health.ĭiesel particulate filter (DPF) systems have been around for decades. With the December 2000 adoption of EPA rule-making in the United States, strict standards were established that aimed at reducing harmful emissions from new heavy-duty trucks and buses, and the stateside automotive industry would forever be changed. From 1997 to 2015, Euro 2-6 regulations were incrementally introduced to further reduce the emissions of both diesel and petrol vehicles. Starting in 1993, Euro 1 regulations set emissions limits for new vehicles in the EU. ![]()
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