| 摘要 |
Pressurized fuel vaporizers for engines. Fuel is vaporized under substantial super-atmospheric pressure. Surfaces (S) are heated by the engine's electrical system. Vapor heated by a wall (60) bounding a vaporization space turbulently 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. an 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 cup 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 the 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). |
