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...Combustion and EGR In this first part of a series, the Institute of the Motor Industry (IMI) looks at the combustion process and emissions in petrol and diesel engines, the reasons behind the need for exhaust gas recirculation (EGR), EGR operation and what happens when things go wrong. Pe...

...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...

...Combustion and EGR Part 3 In the last part of this EGR series, the Institute of the Motor Industry (IMI) continues looking at the combustion process and exhaust gas recirculation (EGR), along with possible faults. There are four methods of EGR feedback that are used to monitor and contr...

...Diesel Engine EGR Feedback Diesel Exhaust Gas Recirculation (EGR) is different in some respects to petrol engines, but it still works in the same basic way. This Institute of the Motor Industry (IMI) guide to CI, or diesel EGR feedback systems, will help you understand how it works and...

...Mercedes E220 CDI Turbocharger Troubleshooting When Bernard Clarke of Clarke’s Garage, Co. Cavan, was confronted with a suspected faulty Variable Nozzle Turbine (VNT), he eliminated all other possibilities before deciding to replace this costly item. Here is what he did and learne...

...Online Vehicle Manufacturers Information As more and more service information is made available on-line, Damien Curran from the Dublin Institute of Technology (DIT) navigates his way through some of the data and lets you know where you can find it. Technical documentation has always bee...

...Petrol Engine EGR Feedback Exhaust Gas Recirculation (EGR) has been around for many years, but just like any system, it has evolved and variations have been designed by various manufacturers. This Institute of the Motor Industry (IMI) guide to the basic variations of EGR feedback systems,...

...Radiator Electrolysis It can happen very quickly, even in a matter of weeks or even days. A perfectly good radiator can develop pin-hole leaks that are an indicator of possible electrolysis. Harbour Radiator’s Garry O’Brien, explains what to look for and how to prevent it from...

...Testing Piezoelectric Injectors When you squeeze quartz an odd thing happens, it will produce a current. When you apply current to quartz, it will rapidly change shape and stay in that new shape. Piezoelectric injectors uses this characteristic to provide fast, precise control of inject...

...Torque & Power 1 Torque and power are the vital statistics of an engine, but often they are poorly understood or completely mis-understood. Because of our links to England, our European present and a romantic relationship with horses, we also have a confusion of units. The Institute...



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