| 摘要 |
<p>The invention relates to a direct-injection internal combustion engine piston, in particular a diesel engine, said piston including a top so-called "caster" surface (6) and a bowl (8) that forms, on the periphery thereof, a torus (10), the connection between the torus (10) and the top surface (6) forming a lip (12), said lip (12) including a circumferential end portion (13) angled toward the bottom of the bowl. Said piston is characterized in that the piston (2) has a torus diameter D and an opening diameter Di for the lip (12) such that the ratio (D-Di)/D is between 0.18 and 0.3. Said piston is moreover characterized in that the piston has a maximum depth T for the bowl (8) and a height Ti for the torus (10) such that the ratio Ti/T is greater than 0.8. The invention also relates to a direct-injection internal combustion engine including at least one such piston.</p> |
