| 摘要 |
A method and system for starting an internal combustion engine by utilizing combustion energy produced by injecting and igniting fuel in an engine cylinder under the expansion stroke, which can eliminate the necessity of precisely computing the combustion energy, can minimize an amount of energy, other than the combustion energy, supplied from a second energy supply unit, and can realize stable engine startup without causing a startup failure due to a combustion failure. At startup of the engine, energy is supplied to the engine from both a first energy supply unit performing direct injection and ignition of fuel, etc. and a second energy supply unit employing, e.g., a starter motor, thereby starting the engine. After the engine has started motion, the motion status of the engine is determined based on, e.g., the engine revolution speed, and the energy supply to the engine from the second energy supply unit is stopped based on a determination result.
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