To enable correct ascertainment of whether opening and closing timing of an intake valve is fixed at an intermediate angle at the start of an engine.
An internal combustion engine includes a valve timing variable mechanism that can vary opening and closing timing of an intake timing and fix it to an intermediate angle between an advancing angle and a delay angle by changing a relative rotation phase of a cam shaft 32 to a crankshaft 11 by changing in an oil pressure supply method. An electronic control device 20 determines that the opening and closing timing of the intake valve 31 is fixed to the intermediate angle when a cylinder pressure Pc in a specific crank angle C1 in a compression cycle during cranking at the start of engine is a specific value Pth or larger.
YOKOYAMA TOMO
KAMO YOSHIRO
Makoto Onda
Next Patent: VEHICLE CONTROL DEVICE AND VEHICLE CONTROL METHOD