MULTI-CYLINDER ENGINE COMBUSTION CHAMBER WITH COMPRESSION IGNITION, SPECIAL DIESEL TYPE WITH DIRECT INJECTION AND ASSOCIATED ENGINE.

摘要

Combustion chamber for direct fuel injection multi-cylinder engine, formed by a cylinder (1), a substantially flat cylinder head (5) forming a cover above the cylinder (1), being mounted on the cylinder head (5), at least , a new air intake valve (10) substantially parallel to the axis (3 '' ') of the cylinder, and, at least one exhaust valve being mounted on the cylinder head, substantially parallel to the axis of the cylinder, an injector central (9) of fuel that flows into the cylinder head (5) and capable of emitting jets (20) of fuel as a truncated cone-shaped layer a and with an outlet (32) located at a distance D2 from the plane of the cylinder head (5 ), and by a piston (1) that slides in the cylinder (1) between an upper dead center and a lower dead point, and which has, on its upper face, a profiled bowl comprising a substantially conical central protuberance (6) from angle to separated by a distance D1 from the plane of the cylinder head (5) when in it is in the upper dead center, and connected, by a short concave section (7), with a widened outer wall (8) of an angle zeta in relation to the vertical, the bowl (2) being surrounded by an annular zone (4) of expulsion, the angle a of the protuberance (6) being greater than 100 °, and the outlet (32) and the angle a of the layer being selected, one in relation to another, so that, in the top dead center, the point of impact of the layer against the bowl (2) is located at the bottom (6, 7) of the bowl (2), characterized in that the angle of the layer a is between 100 ° and 170 °, and the point of exit of the jets (32) is such that D2 D1 / 2, and because the widened outer wall has a truncated conical inclination between 5º and 20º.