VALVE SPRING OF INTERNAL COMBUSTION ENGINE

Title:

VALVE SPRING OF INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP2000205320

Kind Code:

A

Abstract:

To reduce lateral force of a valve spring of an internal combustion engine so as to improve energy efficiency of the internal combustion engine.

A valve spring 26 is specified within durability limit of a material so that the number of effective windings between set height and the maximum use height becomes an integer (for example, it is defined by an integer ±0.125). That 'the number of effective windings becomes an integer' ensures the effect for reducing lateral force of the valve spring 26, and that 'the number of effective windings between set height and the maximum use height becomes an integer' ensures that the number of effective windings of the valve spring 26 becomes an integer while the valve spring 26 is compressed from set height to the maximum use height. That is, this spring does not provide the number of effective windings in a natural condition and is designed in such a way that the number of effective windings between set height and the maximum use height becomes an integer so as to reduce lateral force when the valve spring 26 is used.

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Inventors:

ISONO YUJI
SON IKOKU
TERATOKO KEIICHIROU
ASANO MASAHIKO

Application Number:

JP556899A

Publication Date:

July 25, 2000

Filing Date:

January 12, 1999

Export Citation:

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Assignee:

SUNCALL CORP
TOYOTA MOTOR CORP

International Classes:

F01L3/10; F16F1/06; (IPC1-7): F16F1/06; F01L3/10

Attorney, Agent or Firm:

Shogo Ebara (3 outside)
Shogo Ehara

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