Patent ID: 8201538
Filing Date: 2012-06-19
Classification: F01L,F01M

Abstract:
1. A cylinder head oil passage structure, comprising: oil drop holes formed in a lowest portion of a valve operation chamber in a cylinder head of an engine that is mounted in an inclined state, a wall portion that rises in a bank shape along one side of a cylinder line on an upper face of the cylinder head, each oil drop hole and an oil collector that is formed in the cylinder head at a position higher than openings of said oil drop holes being arranged with said wall portion being interposed therebetween so as to traverse the wall portion, and oil communication passages that run through the wall portion and enable oil to flow from the oil collector to the oil drop holes, wherein the wall portion has formed therein an oil supply passage extending linearly in a direction of the cylinder line and retaining holes retaining a plurality of hydraulic tappets, respectively, that are provided in the direction of the cylinder line and utilize oil supplied from the oil supply passage, and the retaining holes provide communication between the oil supply passage and the respective oil communication passages.