DPF/EGR OFF – What are they and why turn them off?

What is “DPF”? Why hang up?

The "DPF" from English, "Diesel Particulate Filter", or "Diesel Particulate Filter", is a filter designed to remove diesel particles from vehicle exhaust gases. When the filter reaches approx. At 45% saturation, the different sensors of the DPF make the decision to trigger “active regeneration”, where an additive is injected into the filter and the accumulated soot is combusted. There is also the “passive regeneration” of the filter. This usually occurs on longer stretches of highway, where the exhaust gases are hotter, and burn the soot accumulated in the filter by itself. Below is a basic graphic example of the exhaust system of the new Ford Ranger 3.2, equipped with DPF:

Why hang up?

Most of our customers look to our DPF shutdown services for the use of direct exhausts in diesel vans (impossible to do without removing the DPF once the vehicle goes into 'protection mode'). However, the main reason for removing the DPF would be its failure, where the vehicle is in this 'safe mode', with the filter inefficient and the emergency light on on the dashboard, indicating the immediate replacement needed.

In this case, we can reprogram the injection center (ECU), turning off the sensors and all the functions of the DPF system, without the need for replacement. This allows the installation of a “DPF Delete” pipe (direct pipe without the filter), or else -to reduce costs- just the removal of the 'core' of the DPF. This is very advantageous, since a DPF filter can cost several thousand reais at dealerships.

What is “EGR”? Why hang up?

The "EGR" Valve -from English, "Exhaust Gas Recirculation", or "Exhaust Gas Recirculation"-, is a valve developed to reduce the emission of NOx (nitrous oxide) in diesel and gasoline engines, reusing a portion of the exhaust gases in the engine inlet. See below for an illustration of how the valve works:

Why hang up?

The EGR valve is basically a butterfly body driven by the injection center (ECU). Over time, it can generate an accumulation of exhaust soot and fail, causing the vehicle to malfunction and even an engine failure.

The gases reused through the valve contain particles that contaminate the engine oil, which can reduce the useful life of the set; they make the engine run hotter, less economical, and consume more fuel; than it could work without the valve in action.

SOURCE: www.strikebrasil.com