US 4,395,980 AGranted

Overhead cam shaft type V-engine for vehicles

AssigneeYamaha Hatsudoki Kabushiki Kaisha

InventorsNobuyoshi Tominaga, Nobuyoshi Kurai, Hajime Ueno, Sadahide Suzuki

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Abstract

A motorcycle carries a multiple cylinder overhead cam shaft V-type engine whose cylinders are inclined in the plane of longitudinal (forward) movement of the vehicle. One cylinder (preferably the forward cylinder) is laterally offset to the right, and the other is laterally offset to the left. An overhead cam shaft is provided for each cylinder, and is driven by a drive located on the respective cylinder on the outside, in the direction of offset. An ignition plug and its cord are mounted on the opposite side, whereby to be shielded from obstacles by structure associated with the neighboring cylinder.

Claims4

Dependent claims

In combination with a wheeled vehicle having a forward direction of motion, an overhead cam-shaft V-type engine comprising a front and rear cylinder, said cylinders being inclined to the vertical and parallel to a vertical plane which includes the said direction, when the vehicle is upright, said cylinders being laterally offset relative to said direction, oppositely from one another;

an overhead cam shaft on each cylinder;
cam shaft drive means disposed along each respective cylinder on the outside thereof in the direction of the respective offset;
an ignition plug and cord respective to each cylinder mounted thereto on the opposite side thereof, whereby structure associated with each cylinder projects laterally beyond the ignition plug of the other cylinder and thereby protects it from striking obstacles.

Dependencies are inferred from the claim text.