Control device and control method for internal combustion engine

The invention provides a control device and a control method for an internal combustion engine. An internal combustion engine includes a port injection valve, an in-cylinder injection valve, and a supercharger. The internal combustion engine is controlled such that the ratio of the amount of fuel injected from the port injection valve to the total amount of fuel to be combusted once in the cylinder is set as a port injection ratio. When a condition is satisfied that is in an operation state in which a supercharger performs supercharging and that is in an engine operation range in which a valve overlap period is larger than zero, a port injection ratio is set to be smaller than when the condition is not satisfied, and a timing at which fuel is injected from a port injection valve is delayed. 本发明提供内燃机的控制装置以及控制方法。内燃机具有进气口喷射阀、缸内喷射阀以及增压器。以如下方式对内燃机进行控制：在将从进气口喷射阀喷射的燃料量相对于供在气缸内燃料燃烧一次的总燃料量的比率设为进气口喷射比率时，在满足处于增压器进行增压的运转状态且处于阀重叠期间比零大的内燃机运转范围内的条件的情况下，与不满足该条件的情况相比较，将进气口喷射比率设定得较小，且使从进气口喷射阀喷射燃料的开始定时延迟。