| 摘要 |
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. |
