| 摘要 |
PROBLEM TO BE SOLVED: To prevent advanced self-ignition of pre-mixture by promoting atomization of main fuel. SOLUTION: A cylinder head 15 comprises a CO2 injection needle valve body 16 and an ignition fuel valve 7. The CO2 injection needle valve body 16 further comprises a valve 18 for CO2 and a main fuel valve 19. From the main fuel valve 19, fuel blows out to a scroll chamber 21 through a check valve 20 to become vortex flow to make the fuel atomize. Exhaust gas from an engine is guided from an opening/closing valve 24b to a clooler 25 to be cooled by water. In a CO2 adsorber 26, CO2 in the cooled exhaust gas is separated to be liquefied in a CO2 condenser 27. The CO2 is fed by a pump 28 to space 16a to be filled through a solenoid valve 29 for CO2, the CO2 valve 18, and a passage 18a. The CO2 pushes a needle valve 17 up to blow out to the scroll chamber 21, resulting in flowing into a cylinder 1 together with fuel atomized in advance. Accordingly, existence of the CO2 prevents pre-mixture from advanced self-ignition.
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