Camshaft Support Structure of an Internal Combustion Engine

Abstract

A camshaft support structure of an internal combustion engine (10) includes a camshaft (26, 30) that drives an intake valve (18) or an exhaust valve (20); a head cover (34) that houses the camshaft (26, 30); an upper bearing portion (42) which is provided on the head cover (34) and supports the camshaft (26, 30); a lower bearing portion (54) which is attached to the head cover (34) and makes a pair with the upper bearing portion (42) to retain the camshaft (26,30); a rocker arm (22, 24) that transmits driving force from the camshaft (26, 30) to the intake valve (18) or the exhaust valve (20); and a rocker arm support portion (56) that inhibits the rocker arm (22, 24) from falling out of position by being provided near and directly above the rocker arm (22, 24).

Dependencies are inferred from the claim text.