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Rocker arm of IC engine

A technology of internal combustion engine and valve mechanism, which is applied in the field of rocker arm, can solve problems such as multi-time, and achieve the effects of preventing abnormal wear, eliminating bad lubrication, and low cost

Inactive Publication Date: 2006-09-13
ISUZU MOTORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More time is required for the oil to reach each of the above sliding parts

Method used

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  • Rocker arm of IC engine
  • Rocker arm of IC engine
  • Rocker arm of IC engine

Examples

Experimental program
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Effect test

Embodiment Construction

[0029] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0030] figure 2 A valve mechanism of an internal combustion engine according to the present invention is shown. The valve 1 constituting the intake or exhaust valve is supported in a valve guide 3 fixed in a cylinder head 2 so that the valve can move up and down and open and close the valve constituting the intake or exhaust port. A channel 4 inlet or outlet. The valve 1 is always driven upward by a valve spring 5, in other words, it is in the closed state of the valve; a shaft end 1a is pressed down by the rocker shaft 6, so that the valve is pressed down and the valve is opened. . The rocker arm 6 is positioned below a cam 8 of a camshaft 7 and is connected to the valve 1 in order to increase the amount by which the cam 8 lifts.

[0031] A rocker shaft 9 is fixed on the cylinder head 2 via a boss 10 so that it cannot rotate. One end of the rocker...

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PUM

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Abstract

The present invention prevents abnormal wear of the friction surfaces surrounding the rocker arm, prevents poor lubrication when the engine is started at low temperature after a long period of shutdown, and improves reliability. A bag-shaped oil sump (24) opening upward is provided in the middle part of the rocker arm main body (17). A roller (15) and a roller pin (16) are provided inside the oil sump (24) and when the engine stops, these are immersed in the oil in the oil sump (24). When the engine stops, the area between the roller (15) and the roller pin (16) is lubricated. Further, when the engine is re-started after a long period of shutdown, until the oil has risen, the area between the roller (15) and the cam (8) can be lubricated using the oil adhering to the roller (15). When the rocker arm (6) oscillates downward, the oil in the oil sump (24) is supplied from the oil exhaust (28) by spraying towards the valve shaft end.

Description

technical field [0001] This application has the advantages of the basic subject matter disclosed in Japanese Patent Application No. 2001-148157 filed on May 17, 2001, and this Japanese Patent Application is incorporated herein by reference. [0002] This invention relates to a rocker arm for an internal combustion engine, and more particularly to a rolling rocker arm including a roller in sliding contact with a camshaft. Background technique [0003] In the valve train of an internal combustion engine, it is known that a rocker arm is connected to an intake valve or an exhaust valve in order to increase the lift of the cams of the camshaft. In addition, the rocker arm is surrounded by different friction surfaces, and a lubricating mechanism described below is used to lubricate these friction surfaces. [0004] image 3 A conventional rocker arm is shown. In the rocker arm 51, one end of the main body of the rocker arm 52 (hereinafter referred to as "main body") is rotatabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/18F01M9/10F01M1/06
CPCF01L1/462F01L1/18F01L1/185F01L2105/02F01L2810/02F01L2305/02
Inventor 饭岛章
Owner ISUZU MOTORS LTD