| 摘要 |
A compression ignition internal combustion engine according to the present invention includes: at least one combustion chamber; an intake passage and an exhaust passage connected to the combustion chamber, respectively; intake valve provided at a position along the intake passage, for opening and closing the intake passage; exhaust valve provided at a position along the exhaust passage, and is driven by a cam, for opening and closing the exhaust passage, the exhaust valve opening the exhaust passage for a period of at least a portion of an exhaust stroke, and for a period of at least a portion of an intake stroke, during compression ignition combustion mode and during spark ignition combustion mode; and an exhaust throttle provided at a position along the exhaust passage, for opening and closing the exhaust passage, the exhaust throttle recirculating exhaust gas to the combustion chamber by opening the exhaust passage at least during the intake stroke during compression ignition combustion mode, the exhaust throttle preventing the recirculation of the exhaust gas to the combustion chamber by closing the exhaust passage for a period at least when the exhaust valve is open in the intake stroke during spark ignition combustion mode.
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