NOx Control in Diesel Engines

Air is composed of approximately 80 per cent nitrogen and 20 per cent oxygen, and at normal temperatures, no conditions exist to cause the two gases to combine. But in temperatures at which combustion of diesel fuel takes place, above 1,200 degrees Celsius, three nasty oxides of nitrogen can be formed, with the highest temperatures […]

Rich Mixture?

If I poke a couple of fingers up my (Euro-6) Mazda’s tailpipe and wiggle them around (donít worry, itís not habit-forming) they emerge unsullied; do the same trick with a similarly-modern petrol vehicle, and I get sooty fingers! Do you think this says anything more general about relative levels of carbon particulate emissions in the […]

Mid-life update for the Renault Koleos

Renault has announced a refreshed and updated version of the Koleos large SUV, featuring new engines, enhanced looks and technology upgrades. Building on the success of the original model, which was launched in 2017 and amassed 100,000 sales globally in 2018, Renault says the new Koleos delivers greater performance and efficiency, plus improved comfort, refinement and premium appeal.