Regeneration of friction pairs in internal combustion engines by the metal cladding materials

摘要

Purpose - The aim of this paper is to investigate the regularities and longevity of the recovering without takedown of the friction pairs in internal combustion engines using the lubricants with metal cladding materials (MCM). Design/methodology/approach - Recovering of friction pairs of internal combustion engines by MCM was investigated using field experiments. Four automobiles were investigated. The wear of those details was evaluated according to the compression in the cylinders. The influence of MCM on the amount of toxic materials (carbon monoxide and hydrocarbons) in the exhaust gas was evaluated after measurements with a gas analyser. Findings - Using MCM can recover on average 60 per cent of lost compression △P{sub}m. MCM decreases compression dispersion among separate cylinders of the engine. Compression of recovered engine cylinders decreases according to logarithmic function. Increment of cylinders' compression △P{sub}d decreased on average 40-50 per cent after 10,000 km car run. The recovering of the details of a cylinder-piston group with MCM decreases the emission of toxic exhaust gas to the environment. Research limitations/implications - No laboratory investigations of MCM regeneration of friction pairs were performed which could evaluate the influence of different factors on the regeneration quality. Practical implications - Investigations on the use of MCM for recovering the cylinder-piston details of engines show the expedience in using such materials during periodic technical service of engines when the lubricants are changed. Originality/value - Investigations of regenerating engines by MCM using field experiments were performed for the first time.