Engine valve and method of producing the same
AssigneeNissan Motor Co., Ltd.
InventorYoshimasa Hayashi
Life of this patent
Estimating the term…
Abstract
An engine valve of an internal combustion engine comprises a hollow metal tube member whose one end part is flared into an umbrella-shape, the hollow metal tube member constituting a valve stem section. A generally disc-shaped metal lid member is welded to the umbrella-shaped end part of the hollow metal tube member, constituting a valve head section. Additionally, a metal stem end member is welded to the other end of the hollow metal member, thus decreasing the weight of the valve, thereby reducing total engine noise while improving fuel economy.
Claims14
An engine valve of an internal combustion engine, comprising:
- a hollow tube member formed of a drawn steel tube, said hollow tube member having a central portion comprising a tubular body, and a first end part which is flared outwardly and includes an open end peripheral portion at the extreme end of said first end part, said hollow tube member tubular body constituting a valve stem section;
- a generally disc-shaped lid member made of metal and having a peripheral portion integrally connected with the open end peripheral portion of said hollow tube member, said lid member and the first end part of said hollow tube member constituting a valve head section;
- and
- a stem end member made of metal and integrally connected with a second end part of said hollow tube member;
- a filler metal comprising stellite disposed in contact with the open end peripheral portion of said hollow tube member first end part and the peripheral portion of said disc-shaped lid member to secure together said hollow tube member and said lid member to thereby form said integral connection, said stellite filler metal being a wear and corrosion resistant nonferrous alloy, said filler metal being formed as a padding having a peripheral surface including a valve face for contacting a valve seat of an engine;
- and
- a filling comprising an aluminum alloy containing silicon, said filling being disposed in said valve head section to fill said valve head section.
Dependencies are inferred from the claim text.