...In this second part of the series, the Institute of the Motor Industry (IMI) continues looking at the combustion process, stoichiometry and emissions in petrol and diesel engines, concentrating on diesel exhaust g as recirculation (EGR), and the differences between them. The first thing th...
...dback EGR DPF E This uses a differential pressure sensor which monitors the pressure drop created when exhaust gases flow through a restriction or orifice. This means that the actual flow is monitored, not just the command. This gives a much clearer picture of EGR operation and can produce...
...back (EGR DPF E) This system uses a differential pressure sensor which monitors the pressure drop created when exhaust gases flow through a restriction or orifice. This means that the actual flow is monitored, not just the command. This gives a much clearer picture of EGR operation and can...
...filters (DPF ). The DPF removes carbon particulates (black smoke) and stores it. Sensors detect an accumulation of particulates and, when required, initiate a regeneration process which heats the filter to over 600C. The carbon is burnt off as CO2 and ash. The DPF can be problematic, espec...
...filters (DPF 's). Directions for cleaning This 3 step cleaning process can be completed in just 10 minutes. Starting with a cold engine, unclip the intake trunking downstream of the air filter and MAF sensor, if fitted. Spray Revive in 3 doses of 250ml into the intake, first with a co...
...a typical DPF systems with Selective Catalytic Reduction (SCR) After Treatment Devices: Systems for the removal of pollutants from exhaust gases once they have left the combustion chamber, such as Diesel Particulate Filters (DPF 's) and Catalytic Converters. CO2 - Carbon Dioxide: A col...
...C5 - Low DPF Additive The Eolys fluid tank sits below the diesel tank This 2004 diesel C5 had covered quite a few miles, and the owner had suffered a few repair bills just recently. He had vowed that the next problem would be the last and no more cash could be spent on the motor. It w...
...Suspected DPF problem The small pressure sensor is fitted to the top of the engine and takes no time to fit With the MIL suddenly illuminating, the owner of this 2011 Audi A5 was concerned, even though there were no problems with the drive of the Audi and it would seem no apparent reason...
...that the DPF light has extinguished Another satisfied customer, and the garage was confident the fix was done correctly. So the Moral of this fix is always verify any diagnosis for yourself, as we should not take any previous work as being correct without verifying it. Join our gr...
...Filters (DPF s) were already removing particulate matter, a major cause of breathing difficulties. DPF s have been a problem for technicians for some time, but most have come to understand the systems and how to diagnose them. But with SCR, we face different issues that have been cropping...