Internal combustion engine

An internal combustion engine comprising:

• a turbocharger configured to be driven by exhaust gas to increase intake pressure;
• a variable valve timing mechanism configured to change a valve closing timing of an intake valve;
• a variable compression ratio mechanism configured to change a mechanical compression ratio of the internal combustion engine;
• and
• an electronic control unit configured to control the variable compression ratio mechanism such that the mechanical compression ratio becomes a target mechanical compression ratio and to control the variable valve timing mechanism such that the valve closing timing becomes a target valve closing timing,
• wherein the electronic control unit is configured to bring the target valve closing timing close to an intake bottom dead center and make the target mechanical compression ratio low, compared to a steady state after the intake pressure reaches a target pressure, in a transient state before the intake pressure reaches the target pressure in a case where the intake pressure is increased to the target pressure higher than an atmospheric pressure by the turbocharger.