piston ring wear or fracture (Dieselpartsworld) 2016-02-28    

The 40 reason engine burning oil "
26 piston ring installation, circumferential end clearance is too small
We must pay attention to the installation of new piston ring, cylinder, in diameter, a circular piston ring end gap enough still, to compensate for thermal expansion. Usually the vehicle engine cast iron ring need clearance is 0.003-0.005 inches per inch aperture. Due to the direct combustion gas bearing over the combustion chamber, the piston ring heating rate and temperature are higher than the cylinder. The cylinder wall due to water jacket, low temperature. This means that the piston ring expansion more. Therefore, it is necessary to have a gap compensation - that the circumferential end surface gap - otherwise, engine, piston ring end face of the will and the cylinder wall interference, impact, thereby causing wear abrasion, adhesion, resulting in increased fuel consumption. If the engine is running, especially the heavy load, the adhesive wear will be more serious. End surface of the piston ring is pressed inwardly to the piston ring groove, increase the clearance of the ring and the cylinder wall, combustion chamber, high temperature and high pressure combustion gas along the channel direct burning in the cylinder wall lubrication oil and gas channeling into oil pan, greatly increased oil consumption. Serious interference may even cause fracture of the piston ring, the consequences of such as #27 in the.
The piston ring end face circumference of the gap is too large will also result in increased oil consumption.
27 piston ring wear or fracture
If the piston ring fracture or excessive wear, resulting in pressure stress and the gap to maintain will during the suction stroke will excess oil inhalation chamber, the power stroke combustion gas along the piston channeling. The two are back caused by the piston and the cylinder wall and piston ring oil combustion and carbonization. The fracture of the piston ring more destructive, side off pieces with a sharp mouth is likely to cut the piston ring groove, which completely damage and piston ring of the shore. Engine overhaul, the wear of piston ring should be replaced immediately, and not to use. A new type piston ring with quick positioning surface, can immediately control the oil consumption. With the piston ring, even if only a slight wear, because the surface has been polished, not proper positioning, can also lead to excessive oil consumption.