| 摘要 |
Pressurized fuel vaporizers for engines. Fuel is vaporized under substantial super-atmospheric pressure. Surfaces (S) are heated by the engine~s electric al system. Vapor heated by a wall (60) bounding a vaporization space turbulentl y mixes with incoming liquid spray, helping to produce new vapor. Useful for cold start, liquid spray reaching a rapidly heated impact plate (70) is vaporized. Multiple heat-transfer surfaces are exposed to the same vapor volume, one, a surface of revolution surrounding the spray, another, a transverse surface across the spray. The spray is in pulses. Glow plugs (G; G1; 702) are arranged perpendicular to heat-distributing members (62, 70, 704). A volume-surrounding wall receives heat from an annular medium, e.g. a n annular conductive plate (62) or an annulus of phase change material (404), such as low melting point metal, e.g. sodium. Air is shown excluded from the pressure chamber. A fuel vaporizer (700) dedicated to a single combustion region has a cup-shaped vaporization chamber heated by a central heater (702 ) in opposition to liquid spray. Bottom (704) and side (706) surfaces of the c up are constructed to promote mixing circulation. Liquid fuel injection is synchronized with timing of the engine. In such a system also having a vapor injection valve (736B) synchronized with engine timing, the internal between operation of the valves is controlled to enable heat-transfer to vaporize th e fuel and build up pressure. The heating coil of a glow plug is electrically insulated form, but thermally conductively related to, its exterior tube predominantly by fine powdered glass (804) and the exposed seal of the glow plug is pressure-sealed by high temperature seal glass (808).
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