| 摘要 |
<p>Compression ignition is induced by spark ignition to realize stable ignition, thereby expanding an operation range where the compression ignition is operable, even in an operating condition in which the compression ignition is hardly performed. Improvements of cycle efficiency and thermal efficiency and restraint of air-pollution substance emission can be realized by properly adjusting compression ignition timing in a cylinder. A method for operating a homogeneous charge compressed ignition engine 11 in which a mixture gas is burned by compression ignition in a combustion chamber of a cylinder, fuel and air being previously mixed to produce the mixture gas, wherein the homogeneous charge compressed ignition engine 11 includes an ignition plug 37 which performs spark ignition to the mixture gas, an advance-angle limit t1 and a delay-angle limit t2 of spark ignition timing are set, the compression ignition of the mixture gas being able to be induced at the spark ignition timing, and the spark ignition is supplementarily performed to the mixture gas according to an operating condition between the advance-angle limit t1 and the delay-angle limit t2.</p> |
