CHAMBER COMBUSTION SPACE

摘要

The solution concerns a combustion engine with direct fuel injection, where by exchange of pistons it is possible to form antechamber type of combustion space and to adjust in this way the properties of this engine to properties of combustion engines with divided combustion chambers. The invention makes use of advantage of engines with divided combustion chambers that show low pollutant emissions levels contained in exhaust fumes, especially irritant components provoking allergic reaction of mucous membranes of eyes and air passages. As a result of this fact the engine altered in this manner is suitable for use in subsurface excavations and closed working spaces. The antechamber combustion space is in its lower bottom part formed by scale-shaped recession in the piston and in the upper part it is formed by inner wall and by ceiling of the flange insert. The flange insert is with conical circumference of its flange inserted into self-locking conical recession in piston crown and it is tightened by tightening screws. The flange insert has a central neck, to which a jetting nozzle is pointed. Slanting channels starting on the front surface of the flange insert are tangentially mouthed into the wall of flattened combusting space of rotatory shape. Together with slanting surface grooves in the central neck they serve for rotation the compressed charge into a whirling motion contributing to formation of combustion mixture with fuel. Evaporation of fuel is intensified by incandescent collar protruding on the bottom margin of the combustion engine from the flange of the flange insert.<IMAGE>