| 摘要 |
1,132,840. Admission passages; combustion chambers. INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS. Dec.23, 1965 [Dec.23, 1964], No.54665/65. Heading F1B. When the inlet valve 1 of an I.C. engine opens, apertures 8 and 10 in the valve stem and guide come into register, and rich mixture is thus conveyed from a passage 9 to a passage 2 in the valve stem and directed by a passage 3 in the valve head towards an aperture 12, by which aperture the main combustion chamber communicates with a small antechamber, which is bounded by a wall 13 and in which the sparking plug electrodes 4 are located. The antechamber is not provided with any separate fuel/air mixture admission means and has a volume not greater than one tenth of the total volume of the combustion chamber at t.d.c. Weak mixture or air is supplied by inlet passage 11. A member 7 co-operates with a flat 6 on the valve stem to prevent the valve from turning, The passage 3 may be obliquely inclined to the passage 2 and its downstream cross-section may be elongated and narrow, Figs. 2 and 2a (not shown). More than one aperture 12 may be provided. The chamber wall 13 may be part of a special sparking plug. Alternatively, the antechamber may be formed by a shaped cavity in the cylinder head, The antechamber may be conical. |
