The effect of exhaust gas recirculation on diesel engine wear

Exhaust Gas Recirculation (EGR) can be used to significantly reduce diesel engine emissions and in particular oxides of nitrogen (NOx). However, its use is believed to increase engine component wear for items such as the piston ring and liner, bearings and marginal lubrication areas of the valve train. Piston ring and liner wear is believed to increase due to the effect of EGR on in-cylinder corrosion and abrasion wear mechanisms. This study has investigated piston ring and cylinder liner wear on a 1.0 litre/cylinder, four cylinder, four stroke diesel engine when EGR is applied. [Continues.]