Spark ignition internal combustion engine
OwnerYasuhito Yaoitainventor
Life of this patent
Estimating the term…
Abstract
A spark ignition internal combustion engine with improved anti-knocking function. The engine comprises: a cylinder; a cylinder head attached to an end of the cylinder; a piston slidably mounted in the cylinder, a center line of a piston pin of the piston is shifted on the thrust side of the piston with respect to a center line of an outer periphery of the piston; a main combustion chamber with an ignition plug; and a sub-combustion chamber with an inlet opening on an inner wall of the main combustion chamber facing an outer surface of the piston on the anti-thrust side thereof, area of the inlet opening is smaller than that of the outer surface.
Claims10
A spark ignition internal combustion engine comprising:
- a cylinder;
- a cylinder head attached to an end of said cylinder;
- a piston slidably mounted in said cylinder, a center line of a piston pin of said piston shifted on a thrust side of the piston with respect to a center line of an outer periphery of the piston, an outer surface of said piston on an anti-thrust side being in parallel to a center line of said cylinder;
- a main combustion chamber with an ignition plug;
- and
- a sub-combustion chamber with an inlet opening on an inner wall of said main combustion chamber facing an outer surface of the piston on the anti-thrust side thereof, area of said inlet opening is smaller than that of said outer surface,
- wherein said outer surface of the piston on the anti-thrust side and a surface continuing an outer periphery of the inlet opening face to each other in parallel at top dead point, and at top dead point in compression process at high-load operation a clearance between said two surfaces becomes substantially zero.
A spark ignition internal combustion engine comprising:
- a cylinder;
- a cylinder head attached to an end of said cylinder;
- a piston slidably mounted in said cylinder, a center line of a piston pin of said piston shifted on a thrust side of the piston with respect to a center line of an outer periphery of the piston, an outer surface of said piston on an anti-thrust side being in parallel to a center line of said cylinder;
- a main combustion chamber with an ignition plug;
- and
- a sub-combustion chamber with an inlet opening on an inner wall of said main combustion chamber facing an outer surface of the piston on the anti-thrust side thereof, said inlet opening of the sub-combustion chamber formed on an upper portion of the cylinder, area of said inlet opening smaller than that of said outer surface,
- wherein said outer surface of the piston on the anti-thrust side and a surface continuing an outer periphery of the inlet opening face to each other in parallel at top dead point, and at top dead point in compression process at high-load operation a clearance between said two surfaces becomes substantially zero.
Dependencies are inferred from the claim text.