| 摘要 |
A precombustor 10 for use in diesel engines comprises a precombustion chamber 12, a fuel spray nozzle port 18 through which a fuel spray nozzle 20 may be incorporated into the precombustion chamber 12, an igniter port 22 for an ignition means adjacent to said spray nozzle port 18, and a supersonic DeLaval nozzle 14 integrally incorporated into the precombustion chamber 12 opposite said spray nozzle port 18 for enhancing the injection of air into the precombustion chamber 12. Axially connected to the throat area of the DeLaval nozzle 14 is a two-dimensional subsonic diffuser 34 and flow passage 30 for transferring air from the diesel piston to the precombustion chamber 12 and combustion gases from the precombustion chamber 12 into the diesel cylinder.
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