Lubrication apparatus of high pressure pump for common rail system

a technology of high pressure pump and lubrication apparatus, which is applied in the direction of auxilary lubrication, machines/engines, liquid fuel engines, etc., can solve the problems of high pressure pump b>10/b> being broken due to friction, severe wear, and the restriction portion

Inactive Publication Date: 2014-06-19
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018]The apparatus may further include a check valve that is disposed in the support lubrication passage, allows the flow of fuel from the first lubrication passage to the support lubrication passage, and prevents backflow of fuel from the support lubrication passage to the first lubrication passage.

Problems solved by technology

However, there is a defect in the structure of the related art described above in that the lubricating fuel flows a long distance to the friction portion M1 between the roller 12 and the shoe 13, so that the camshaft 21 operates before the friction portion M1 between the roller 12 and the shoe 13 is sufficiently lubricated, and in this case, not only the friction portion M1 between the roller 12 and the shoe 13 under large compressive load is severely worn, but the high pressure pump 10 is broken due to burning and sticking, if excessive.

Method used

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  • Lubrication apparatus of high pressure pump for common rail system
  • Lubrication apparatus of high pressure pump for common rail system
  • Lubrication apparatus of high pressure pump for common rail system

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Embodiment Construction

[0029]Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is / are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

[0030]A high pressure pump 10 for a common rail system according to various embodiments of the present invention, as shown in FIGS. 3 to 5, includes a pump housing 11, a roller 12, a shoe 13, and a plunger 14, in which a shaft chamber 11a, a roller chamber 11b, and spring chamber 11c are connected in the pump housing 11.

[0031]A camsha...

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PUM

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Abstract

A lubrication apparatus of a high pressure pump for a common rail system can improve lubrication performance for a friction portion M1 between a roller 12 and a shoe by supplying a large amount of lubricating fuel, which is supplied from a low pressure pump 24, to the friction portion M1 for a short time.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority of Korean Patent Application Number 10-2012-0147886 filed Dec. 17, 2012, the entire contents of which application is incorporated herein for all purposes by this reference.BACKGROUND OF INVENTION[0002]1. Field of Invention[0003]The present invention relates to a lubrication apparatus of a high pressure pump for a common rail system, and more particularly, a lubrication apparatus of a high pressure pump for a common rail system which can improve lubricating performance of a friction portion where a roller and a shoe are in contact.[0004]2. Description of Related Art[0005]A high pressure pump 10 used in common rail systems, as shown in FIGS. 1 and 2, includes a pump housing 11, a roller 12, a shoe 13, and a plunger 14 wherein a shaft chamber 11a, a roller chamber 11b, and spring chamber 11c are connected in the pump housing 11.[0006]A camshaft 21 with a cam 21a is rotatably disposed in the shaft chambe...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01M11/02
CPCF02M59/102F02M59/44F02M63/0001F04B53/18F01M1/06F02M59/10
Inventor KWUN, SUN DONGYOU, SUNG ILHWANG, CHANG SUN
Owner HYUNDAI MOTOR CO LTD
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