Internal combustion engine

An internal combustion engine comprising:

• a camshaft that drives an engine valve;
• a cam bracket fixed to a cylinder head and rotatably supporting therebetween the camshaft;
• a head cover that covers an upper portion of the cylinder head at which the camshaft and the cam bracket are provided;
• a variable valve timing mechanism provided at an end of the camshaft and actuated by oil pressure for varying a valve timing;
• an oil pressure control valve that controls the oil pressure;
• and
• an oil passage fluidly connecting between the oil pressure control valve and the variable valve timing mechanism;
• wherein the oil pressure control valve is installed on the head cover;
• and
• wherein the oil passage includes:
• a first oil passage section formed in the camshaft and in communication with the variable valve timing mechanism;
• a second oil passage section formed in the head cover and in communication with the oil pressure control valve;
• and
• a third oil passage section formed in the cam bracket and providing communication between the first oil passage section and the second oil passage section.