| 摘要 |
This diesel engine uses a low evaporativity fuel, and is adapted to improve the fluidity of the air and fuel by injecting the fuel into a cylinder at the beginning of a compression stroke, and form a uniform gaseous mixture, whereby the generation of NOx is minimized. In this diesel engine, a swirl chamber(2) is formed in a piston(5), and a primary chamber(1) by a combustion chamber structure(3) provided in a cavity(9) of a cylinder head(7). A fuel injection nozzle(6) is adapted to inject a low evaporativity fuel, such as heavy oil into the cylinder(8) at the beginning of a compression stroke, disperse the fuel into an air swirl in the cylinder(8), form a uniform gaseous mixture of the fuel and air therein, and ignite and burn with the assistance of a glow plug(4) the gaseous mixture entering the swirl chamber(2) through communication ports(15) at the terminal end of the compression stroke. In another embodiment, the piston(45) is provided with a plurality of radially a ranged communication ports(55) and a downwardly convergent fuel injection port(53), and a fuel injection nozzle(46) is adapted to inject a low evaporativity fuel, such as heavy oil into a cylinder (48) at the beginning of a compression stroke, disperse the fuel into an air swirl in the cylinder(48), form a uniform gaseous mixture of the fuel and air in the cylinder(48), and ignite and burn the gaseous mixture in the swirl chamber(42) by reliably supplying an ignition fuel thereto through the fuel injection port (53) at the terminal end of the compression stroke. <IMAGE> |
