Internal-combustion engines – Poppet valve operating mechanism – Rocker
Patent
1996-08-07
1998-03-24
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Rocker
123 9041, 74519, 74559, 298882, F01L 118
Patent
active
057300933
ABSTRACT:
The invention provides a rocker arm and a method of making it having a cold formed steel body including parallel side walls and a bearing housing in the form of a sleeve attached to the side walls and defining a through opening to receive needle bearings. The sleeve has surfaces resistant to gas hardening so that after the arm has been subject to gas hardening only the main body is hardened leaving the sleeve unaffected. A method of making the rocker arm according to the invention includes preparing a sleeve having a surface which is resistant to gas hardening and which is unaffected by brazing temperatures; attaching the sleeve to the arm by brazing; and gas hardening the completed arm at a temperature less than the brazing temperature.
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Calka Andrzej
Sytsma Anthony G.
Lo Weilun
Sandco Automotive Limited
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