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Active valve mechanism of internal combustion engine

A technology of internal combustion engines and moving valves, which is applied in the direction of machines/engines, valve details, valve devices, etc., and can solve problems such as rocker arm friction

Inactive Publication Date: 2011-01-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, since the rocker arm is axially biased by the mounting spring, friction occurs during the swing of the rocker arm.

Method used

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  • Active valve mechanism of internal combustion engine
  • Active valve mechanism of internal combustion engine
  • Active valve mechanism of internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0035] Next, an embodiment of the present invention will be described based on FIGS. 1 to 16 .

[0036] FIG. 1 is a side view of a scooter 1 to which an embodiment of the present invention is applied.

[0037] In the present embodiment, front, rear, left, and right are determined based on the state facing the forward direction of the vehicle.

[0038] The front part 1f of the vehicle body and the rear part 1r of the vehicle body are connected together by the low floor part 1c.

[0039] That is, the down pipe 3 extends downward from the head pipe 2 of the front part 1f of the vehicle body. The same down pipe 3 is bent horizontally at the lower end and extends backward through the bottom of the floor portion 1c. A pair of left and right main pipes 4 are connected to the rear end. The main pipe 4 rises obliquely rearward from this connecting portion, is bent horizontally at a predetermined height, and extends rearward.

[0040] The fuel tank 5 is supported by the same main pipe...

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PUM

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Abstract

The invention relates to an actuated valve mechanism for internal combustion engine, which can limit the axial movement of the swing arm without enlarging the bearing part or swing arm and generating friction. A cylindrical sleeve (61) inserted with a swing arm shaft (57) is mounted between the bearings (33R),(33L) and the axial movement of the swing arm is limited. An oil passage (57a) is axially formed on the swing arm shaft (57), and an oil ejecting passage (57c) radially perforates and passes through the outer circumference at axial preset position and an oil ejecting hole (61c) on the sleeve (61) radially perforates and is formed at the preset position corresponding with the oil ejecting passage (57c) of the swing arm shaft (57). A sleeve rotation preventing mechanism is provided to prevent the sleeve (61) from rotating.

Description

technical field [0001] The present invention relates to a valve train for an internal combustion engine. Background technique [0002] In a valve mechanism having a structure in which the rocker arm of the on-off valve is pivotally supported on the rocker shaft, there is an example in which an oil discharge port is formed in communication with the rocker shaft and the rocker arm where the oil passage is formed (see Patent Document 1 ). [0003] Patent Document 1: (Japanese) Publication No. 7-41849 [0004] In the same patent document 1, the rocker arm shaft is bridged and supported by bearing portions of a pair of facing cam levers, and the rocker arm is pivotally supported by bearings on both sides so as to be swingable. [0005] Since the axial width of the rocker arm is smaller than the distance between the pair of cam levers, the two bearings supporting the cam levers at both ends of the rocker arm shaft extend to a position where the rocker arm is pinched, thereby inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01M9/10F01L1/02
CPCF01L1/024
Inventor 平山周二山西辉英
Owner HONDA MOTOR CO LTD