US 2004/0103871 A1 · Four-cycle engine

Abstract

A cylinder block, a cylinder head and a cylinder head cover are stacked in order to form a four-cycle engine. A valve train of a single overhead camshaft (SOHC) type provided with an intake valve and an exhaust valve is provided in the cylinder head. A line extending parallel with a joint between the cylinder head and the cylinder head cover is inclined forward and downward toward a line parallel with a joint between the cylinder block and the cylinder head. An axis of an exhaust valve and/or an axis of a plug tube is/are perpendicular to the line extending parallel with the joint between the cylinder head and the cylinder head cover. A cylinder head hanger is integrally formed at an uppermost end of a rear portion of the cylinder head over an intake port.

Claims18

Dependent claims

A four-cycle engine comprising:

a cylinder block;
a cylinder head;
a cylinder head cover, wherein said cylinder head cover is stacked on top of said cylinder head and said cylinder head is stacked above said cylinder block;
an intake valve and an exhaust valve opening or closing by an operative engagement with a camshaft arranged above the cylinder head;
a joint being formed between the cylinder head and cylinder block, wherein the joint of the cylinder head and the cylinder block extends diagonally with respect to an axis of either the intake valve or the exhaust valve;
and
a joint being formed between the cylinder head and the cylinder head cover, wherein the axis of either the intake valve or the exhaust valve is perpendicular to the joint between the cylinder head and the cylinder head cover.

4 more elements

Dependencies are inferred from the claim text.

Four-cycle engine

Life of this patent

Four-cycle engine

Life of this patent

Abstract

Claims18