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DPF(Diesel Particulate Filter)

If you buy a modern diesel car it will come with a DPF, but what does this mean for you?

Exhaust emissions standards introduced by Euro 5 in 2009 mean that all new diesel cars sold since then (and some before) have been fitted with a diesel particulate filter. The DPF helps to reduce the emissions of harmful particulates such as soot by up to 80 per cent. However, the technology has been controversial, with some car owners claiming that […]

Exhaust Gas Recirculation (EGR)-Nox Measurement

A widely adopted route to reduce NOx emissions is Exhaust Gas Recirculation (EGR). This involves recirculating a controllable proportion of the engine’s exhaust back into the intake air. A valve is usually used to control the flow of gas, and the valve may be closed completely if required.
The substitution of burnt gas (which takes no further part in combustion) for oxygen rich air reduces the proportion of the cylinder contents available for combustion. This causes a correspondingly lower heat […]