skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Rocker arm spring for a valve actuating mechanism of an internal combustion engine

Abstract

A rocker arm spring is described for use in a valve actuating mechanism of an internal combustion engine having a cylinder head, an overhead camshaft mounted on the cylinder head and a valve having a valve stem extending through the cylinder head, the valve actuating mechanism including a rocker arm having a first end and a second end, a universal pivot swingably supporting the first end of the rocker arm on the cylinder head of the engine. The second end of the rocker arm is in contact with the valve stem, and a cam on the overhead camshaft engaging from above a portion of the rocker arm intermediate the first and second ends to cause the rocker arm to swing about the universal pivot, the universal pivot including a support socket mounted on the cylinder head. The support socket has a part-spherical concave bearing surface and a circumferential groove with a fixed predetermined groove width, and a pivotable shaft mounted on the first end of the rocker arm, the pivotable shaft having a part-spherical convex lower end mating with and received in the concave bearing surface, and the rocker arm spring being in the form of a leaf spring mademore » of an elongated strip of resilient material thinner than the predetermined groove width, the strip being bent to a substantially U-shape having an upper arm and a lower arm, the lower arm having a forked end engageable within the circumferential groove in the support socket. The upper arm is engageable with the rocker arm for urging the lower end of the pivotable shaft into contact with the bearing surface of the support socket as well as for biasing the second end of the rocker arm into contact with the valve stem.« less

Inventors:
;
Publication Date:
OSTI Identifier:
5504113
Patent Number(s):
US 4598674
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 10 Jan 1985
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; VALVES; CYLINDERS; SHAFTS; SPACE DEPENDENCE; SPRINGS; SUPPORTS; CONTROL EQUIPMENT; ENGINES; EQUIPMENT; FLOW REGULATORS; HEAT ENGINES; MACHINE PARTS; MECHANICAL STRUCTURES; 330100* - Internal Combustion Engines

Citation Formats

Nono, Y, and Sasaki, Y. Rocker arm spring for a valve actuating mechanism of an internal combustion engine. United States: N. p., 1986. Web.
Nono, Y, & Sasaki, Y. Rocker arm spring for a valve actuating mechanism of an internal combustion engine. United States.
Nono, Y, and Sasaki, Y. 1986. "Rocker arm spring for a valve actuating mechanism of an internal combustion engine". United States.
@article{osti_5504113,
title = {Rocker arm spring for a valve actuating mechanism of an internal combustion engine},
author = {Nono, Y and Sasaki, Y},
abstractNote = {A rocker arm spring is described for use in a valve actuating mechanism of an internal combustion engine having a cylinder head, an overhead camshaft mounted on the cylinder head and a valve having a valve stem extending through the cylinder head, the valve actuating mechanism including a rocker arm having a first end and a second end, a universal pivot swingably supporting the first end of the rocker arm on the cylinder head of the engine. The second end of the rocker arm is in contact with the valve stem, and a cam on the overhead camshaft engaging from above a portion of the rocker arm intermediate the first and second ends to cause the rocker arm to swing about the universal pivot, the universal pivot including a support socket mounted on the cylinder head. The support socket has a part-spherical concave bearing surface and a circumferential groove with a fixed predetermined groove width, and a pivotable shaft mounted on the first end of the rocker arm, the pivotable shaft having a part-spherical convex lower end mating with and received in the concave bearing surface, and the rocker arm spring being in the form of a leaf spring made of an elongated strip of resilient material thinner than the predetermined groove width, the strip being bent to a substantially U-shape having an upper arm and a lower arm, the lower arm having a forked end engageable within the circumferential groove in the support socket. The upper arm is engageable with the rocker arm for urging the lower end of the pivotable shaft into contact with the bearing surface of the support socket as well as for biasing the second end of the rocker arm into contact with the valve stem.},
doi = {},
url = {https://www.osti.gov/biblio/5504113}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 08 00:00:00 EDT 1986},
month = {Tue Jul 08 00:00:00 EDT 1986}
}