USE OF DISPERSANT VISCOSITY INDEX IMPROVER IN EXHAUST GAS RECIRCULATION ENGINE

摘要

PPROBLEM TO BE SOLVED: To obtain a lubricant reducing oil thickening and sludge formation, and to provide an engine using the lubricant. PSOLUTION: An olefin copolymer dispersant viscosity index improver is used in a cooled exhaust gas recirculation (EGR) engine so as to reduce or eliminate oil thickening and sludge formation. Thereby, rigorous oil viscosity and emission standards are exactly satisfied. PCOPYRIGHT: (C)2005,JPO&NCIPI