| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively provide a cylinder injection type internal combustion engine excellent in fuel consumption performance and exhaust gas performance. SOLUTION: In this cylindrical injection type internal combustion engine, a cam phase variable device 43 to variably change not only the cam phase of an intake air side cam shaft 41 but also the closing time of an intake valve 31 is provided, a required quantity of intake air is obtained by exhausting a part of air sucked into a combustion chamber 4 until the intake valve is closed by setting the closing time of the intake valve at a proper time in a compressing process, and on the other hand, a required quantity of fuel is supplied into the combustion chamber from a fuel injection valve 51. Improvement in fuel consumption due to reduction of a pumping loss is thereby contrived by making it possible to adjust the output of the engine with a throttle fully opened, and exhaust gas is cleaned by a ternary catalyst 24 inexpensive and excellent in cleaning efficiency by setting the air-fuel ratio of the exhaust gas at a value close to a theoretical air-fuel ratio.
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