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Air valve driver for IC engine

A driving device, internal combustion engine technology, applied in the direction of valve driving device, valve device, machine/engine, etc.

Inactive Publication Date: 2008-06-11
MITSUBISHI MOTORS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current situation is that it is necessary to consider the rigidity of the structure of the abutting portion of the drive rocker arm relative to the rotating low-speed cam.

Method used

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  • Air valve driver for IC engine
  • Air valve driver for IC engine
  • Air valve driver for IC engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] figure 1 A plan view showing a cover portion of an internal combustion engine equipped with a valve driving device according to an example of Embodiment 1 of the present invention, figure 2 show figure 1 The magnification condition of the main part of , image 3 yes figure 2 The direction view of the line III-III, Figure 4 yes figure 2 The view of the line IV-IV in the middle, Figure 5 yes figure 2 The view of the V-V line in the middle, Figure 6 7 is a perspective view of the rocker arm viewed from the side of the camshaft, FIG. 8 is a perspective view of the rocker arm viewed from the intake valve side, and FIG. 9 is a main part of the internal combustion engine showing the hydraulic system. oblique view of Figure 10 A section showing the installation condition of the accumulator, Figure 11 Shows the schematic circuit conditions of the hydraulic system.

[0029] Such as figure 1 As shown, an intake-side rocker shaft 2 and an exhaust-side rocker sha...

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PUM

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Abstract

SOLUTION: A mechanism has a first rocker arm 5, a second rocker arm 7 and the third rocker arm 6, and switches a driving cam for opening-closing an intake valve and a second intake valve by supply / release of pressure oil. A third roller follower 24 of the third rocker arm 6 is formed of a double ring-shaped sliding roller structure of an inner roller 22 and an outer roller 23. Impact strength is improved: the rigidity of the abutting part of the third rocker arm 6 to the rotating second low lift cam is improved; the rotation resistance is reduced; friction is reduced by forming a second roller follower 27 to a high lift cam 20 out of a needle bearing; and the rotational resistance is reduced.

Description

technical field [0001] The present invention relates to a valve drive device for an internal combustion engine capable of opening and closing an intake valve or an exhaust valve of the internal combustion engine at different drive timings. Background technique [0002] In recent years, a method for optimally switching the operating characteristics of the intake valve or exhaust valve (engine valve) provided in a reciprocating internal combustion engine (engine) according to the load state or speed state of the engine, that is, the opening and closing Timing or valve actuation during opening. [0003] In such a valve driving device, as one of the mechanisms for switching the operating characteristics, for example, according to the rotation state of the engine, a low-speed cam and a cam profile suitable for the low-speed rotation of the engine are selectively used. The technology of opening and closing the valve of the internal combustion engine by using the high-speed cam of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/18F01L1/02F01L13/02
Inventor 冈俊彦长野修治德久胜规
Owner MITSUBISHI MOTORS CORP