789262.fig.0021
Figure 21: Internal-combustion engine with porous structure to promote mixture formation and combustion [55]: 1-engine head; 2-cylinder liner; 3-cylinder axis; 4-piston; 5-connecting rod; 6-main combustion chamber; 7-piston bowl; 8-bowl outlet; 9-chamber limited by porous matrix; 10,10′-porous matrix; 12-injection nozzle.