US 4,909,198 AGranted

Aluminum alloy valve lifter with sprayed coating and method of producing same

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsShigeki Shiraya, Takesi Nakakobara, Hitoshi Ishii, Takashi Tomoda, Kenji Shimoda, Souichi Hayashi, Zenichiro Kato, Syuichi Ezaki

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Abstract

An aluminum alloy valve lifter comprises a valve lifter body made of Al-Si (5-20%) type alloy, having silicon average grain diameter of 2 to 40 micrometers, and consisting of a cylindrical portion and a disc portion; an Fe-C type sprayed coating formed on the peripheral surface of the cylindrical portion, containing 0.1% or more of carbon and having a hardness of 300 Hv or more; a wear-resistant chip fixed on the underside of the disc portion; and an adjusting shim set on the upper side of the disc portion.

Claims4

Dependent claims

An aluminum alloy valve lifter having a sprayed coating comprising:

a valve lifter body of an aluminum alloy essentially consisting of 5 to 20% Silicon, an additive element for increasingt strength, aluminum and inevitable impurities, and holding silicon particles having an average grain diameter of from 2 to 40 micrometers in the matrix thereof;
an Fe-C type sprayed coating formed on a sliding peripheral surface of said valve lifter body having a carbon content of 0.1% or more and a hardness of 300 Hv or more;
a wear-resistant chip fixed on a portion of the valve lifter body for contact with a valve rod;
and
an adjusting shim set on another portion of the body for contact with a cam.

2 more elements

Dependencies are inferred from the claim text.