| 摘要 |
1491127 Exhaust passage liners FORD MOTOR CO Ltd 23 May 1975 [2 Aug 1974] 22606/75 Heading F1B The exhaust passage 16 of an I.C. engine, supplied with rich and lean mixtures and having a thermal reactor 28, has means 23 subdividing at least the outer peripheral zone of the passage so that laminar flow occurs in the peripheral zone of said passage so as to reduce heat loss from the exhaust. The means may be a liner comprising a plurality of concentric metal or ceramic sleeves 37, 38, Fig. 3, spaced by webs 39. Alternatively a honeycomb structure or spiral of parallel structure of sheets separated by corrugations, Figs. 4 to 6 (not shown), may be used. The engine may be arranged as in Fig. 1 to induct a weak mixture from carburetter 14 which is locally reinforced by injector 7 or a pre-combustion chamber may be provided. The engine may be of'the rotary type, Fig. 9, having a rotor formed with two recesses 80, 81 to define with the stator two combustion chambers. Expansion of mixture in recess 81, but not in recess 80, occurs until the point of ignition is reached which is stated to give rise to the operating condition of the pre-combustion chamber engine. Alternatively pre-combustion chamber can be provided each side of the rotor 100, 101, Fig. 13 (not shown), fed by direct injection with rich mixture.
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