In-vehicle internal combustion engine

A V-type in-vehicle internal combustion engine comprising two banks that are a first bank including a plurality of cylinders disposed along a rotational axis direction of a crankshaft and a second bank including a plurality of cylinders disposed along the rotational axis direction of the crankshaft, the in-vehicle internal combustion engine being provided with an intake manifold outward of each of the banks, wherein:

• a head cover to which a fuel supply device supplying fuel to the cylinders is fitted is provided in each of the banks;
• and
• when the rotational axis direction of the crankshaft is defined as a front-rear direction of the in-vehicle internal combustion engine, and a direction parallel to a reference plane and orthogonal to the front-rear direction is defined as a left-right direction of the in-vehicle internal combustion engine, the reference plane being a horizontal plane in a posture of the in-vehicle internal combustion engine while the in-vehicle internal combustion engine is mounted on a vehicle, a protrusion is provided on the head cover, the protrusion being located outward of a portion of the fuel supply device that is exposed from the head cover, in the left-right direction.