FIELD: multi-fuel internal combustion engines. SUBSTANCE: main outer and inner eccentric inserts with toothed rims are rotatable in main journals of crankshaft raising or lowering this crankshaft together with pistons, thus ensuring regulation of volume of combustion chamber depending on kind of fuel used. Inner and outer eccentric crankpin inserts with toothed rims are rotatable in crankpin of crankshaft raising or lowering the pistons, thus ensuring optimal volume of combustion chamber depending on magnitude of load exerted on engine for definite kind of fuel. EFFECT: enhanced operational efficiency of engine. 7 cl, 3 dwg
