US 6,786,189 B2 · Internal combustion engine

Abstract

A piston slidably fitted in a cylinder is connected to an auxiliary piston slidably fitted in an auxiliary cylinder coaxial with the cylinder through a first connecting rod. The left and right crankshaft halves are disposed outside of a piston sliding range of the cylinder with respect to the radial direction thereof. The increase of the volume of a combustion chamber corresponding to the increase of the crank angle with reference to top dead center of the piston is suppressed, and it is therefore possible to enhance the equal volume degree at the time of combustion of a mixture gas and to enhance thermal efficiency. This arrangement also enhances thermal efficiency, and simplifies the structures of intake systems and valve mechanisms when employed in horizontally opposed type internal combustion engine.

Claims10

Dependent claims

An internal combustion engine comprising:

a cylinder;
a cylinder head;
a piston slidably fitted in the cylinder;
an auxiliary cylinder coaxial with the cylinder;
an auxiliary piston slidably fitted in the auxiliary cylinder;
a first connecting rod integrating the piston and the auxiliary piston into a single unitary body;
a combustion chamber provided in the cylinder head;
a pair of left and right crankshaft halves;
and
a pair of second connecting rods connecting the auxiliary piston to the left and right crankshaft halves through an intermediate pin, wherein the left and right crankshaft halves are disposed adjacent to and along the outside of the cylinder with respect to a radial direction of said cylinder, and within a piston sliding range of said cylinder.

7 more elements

Dependencies are inferred from the claim text.

Internal combustion engine

Life of this patent

Internal combustion engine

Life of this patent

Abstract

Claims10