| 摘要 |
689,585. Combustion chambers. LEYLAND MOTORS, Ltd., and MUELLER, A. May 18, 1951 [May 18, 1950], No. 12476/50. Class 7 (iii). The combustion chamber of a direct injection engine is formed wholly in the piston and is bounded by a collar of less diameter than the cylinder pierced by pas- .sages at its base nearly tangential to the periphery of the combustion chamber, and a part of the cylinder adjacent the cylinder head is reduced in diameter to fit the collar on the piston. The collar 6 bounding the combustion chamber 1 engages a ring 4 at top dead centre, whereby an air space 12 is cut off from communication with the combustion chamber 1 and the air in the space is forced into the combustion chamber through tangential passages 7. The ring 4 is notched at the parts adjacent the overhead intake and exhaust valves 13, 14 in order to accommodate the valve opening movement. As shown the chamber 1 is eccentric of the piston axis but in a modification the combustion chamber is coaxial with the cylinder and the fuel injection nozzle eccentric thereof, the overhead valves being arranged within the bore of the ring 4 so that notching thereof is unnecessary.
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