Rocker arm assembly
a technology of arm and rocker, which is applied in the direction of auxillary lubrication, mechanical control devices, instruments, etc., can solve the problems of bearing surface wear, cam roller overheating, and hindering lubrication
Inactive Publication Date: 2015-08-06
ELECTRO-MOTIVE DIESEL
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Benefits of technology
The present patent discusses a rocker arm assembly for an engine. The assembly includes a rocker arm and a cam roller assembly. The cam roller has a bearing surface and an oil delivery pocket. The oil delivery pocket has a rounded edge with a transitional opening. The assembly also includes a bearing component with an oil hole and a countersunk oil delivery pocket on its outer surface. The oil hole has a rounded edge and a transitional opening. The technical effects of the invention include improved lubrication and reduced friction in the bearing of cam rollers, which leads to better engine performance and durability. The specific process involves forming the oil hole with a countersunk oil delivery pocket and its transformed edge with a rounded surface and a transitional opening.
Problems solved by technology
Presence of sharp edges at the openings of the oil holes causes wear at the bearing surface and also hinders lubrication and eventually leads to the overheating the cam roller.
Method used
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Embodiment Construction
[0012]FIG. 1 is an exemplary view of an internal combustion engine 100, hereinafter referred to as “the engine 100”. The engine 100 may be any type of engine (gas, diesel, gaseous fuel, natural gas, or propane based engine etc.), may be of any size, with any number of cylinders, and in any configuration (“V”, in-line, radial, etc.). The engine 100 may be used to power any machine or other device, including on-highway trucks or vehicles, off-highway trucks or machines, earth moving equipment, generators, aerospace applications, locomotive applications, marine applications, pumps, stationary equipment, and other engine powered applications.
[0013]In an aspect of the present disclosure, the engine 100 may be a compression ignition internal combustion engine, such as a diesel engine. For clarity, the following description refers to a single cylinder engine, but the principle of the present disclosure can be applied to a multi-cylinder engine. The engine 100 includes a cylinder block 102,...
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Abstract
A rocker arm assembly for a valve operation in an engine includes a rocker main body extending between a first end and a second end. The first end of the rocker arm main body is configured to receive a valve actuation button and the second end of the rocker arm main body is configured to receive a cam roller assembly. The cam roller assembly includes a cam roller and a bushing is disposed in the cam roller forming a bearing surface. Further, the cam roller assembly includes a bearing component which is disposed in the bushing forming a bearing surface. The bearing component includes an oil hole with an oil delivery pocket which is curved to form a rounded edge and an transitional opening is formed extending from the rounded edge.
Description
TECHNICAL FIELD[0001]The present disclosure relates to a rocker arm assembly having a cam roller assembly, and more particularly to a bearing component of the cam roller assembly and method of manufacturing the bearing component.BACKGROUND[0002]Generally, in an engine having a cam actuated valve operation, a rocker arm assembly is used for opening and closing of the valves. The operation of the rocker arm assembly is one of the critical parameters for achieving optimal performance of the valves, in a way directly impacting engine performance. A cam roller assembly disposed at one end of the rocker arm assembly is subjected to continuous rotation during the engine operation. The continuous rotation requires an effective lubrication between a bearing surface and a bearing component in the cam roller assembly. The lubrication is achieved by supplying oil through one or more oil holes provided on the bearing component. Presence of sharp edges at the openings of the oil holes causes wear...
Claims
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IPC IPC(8): F01M9/10F01L1/18
CPCF01L1/181F01M9/107F01M9/106Y10T29/49295Y10T74/20582
Inventor PAULSON, TIMOTHY J.
Owner ELECTRO-MOTIVE DIESEL