ススによって発生するシリンダボア・ピストンリング摩耗の解析(1)

―ディーゼルエンジンのEGR 摩耗に対するピストン摩擦力からの解析―

抄録

Deterioration of friction and wear due to particulate matter is one of the common lubrication problems. Lubrication failure due to soot generated by combustion in internal combustion engines frequently becomes a problem. In particular, abnormal wear of each part of the engine due to exhaust gas measures called EGR (Exhaust Gas Recirculation) is well known. EGR has a great effect on reducing nitrogen oxides, but abnormal wear occurs on piston rings and cylinder bores. This abnormal wear was actively studied about 20 years ago. Even today, the deterioration of friction and wear due to particulate matter is a serious problem. Here, the papers analyzed from different viewpoints are introduced in two explanations. This explanation is one of two explanations. This explanation summarizes the following contents. EGR increases the frictional force of the piston ring, thereby increasing wear. The cause of the change in frictional force is that particulate matter enters the back of the ring. The slap force of the piston is transmitted to the piston ring via the particulate matter. This force is the cause of increased wear on EGR.