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Valve opening/closing timing control device

A timing control and valve technology, applied in valve device, engine control, machine/engine, etc., can solve the problems of complex and large valve opening/closing timing control device, and achieve the effect of mechanical simplicity

Inactive Publication Date: 2011-04-27
AISIN SEIKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the valve opening / closing timing control device has a tendency to become larger and more complicated

Method used

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  • Valve opening/closing timing control device
  • Valve opening/closing timing control device
  • Valve opening/closing timing control device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0046] (basic structure)

[0047] Such as figure 1 As shown, the valve opening / closing timing control device includes an outer rotor 1 serving as a driving side rotating member and capable of rotating synchronously with a crankshaft (not shown) of an engine (internal combustion engine), serving as a driven side rotating member and capable of rotating with The inner rotor 2 is coaxial and rotates synchronously with the camshaft 3, which opens and closes the intake or exhaust valves in the combustion chamber of the engine, and the fluid control valve train V.

[0048] The valve opening / closing timing control device includes a structure in which an inner rotor 2 (a driven-side rotating member) is inserted into an outer rotor 1 (a driving-side rotating member). Therefore, the outer rotor 1 and the inner rotor 2 can relatively rotate around the rotation axis X within a range of a desired relative rotational phase. A fluid pressure chamber is formed between the outer rotor 1 and t...

no. 2 approach

[0096] A second embodiment disclosed herein will be described below with reference to the drawings.

[0097] Similar to the first embodiment, the second embodiment includes two coil springs S1 and S2 as a holding mechanism M for holding the relative rotational phase of the outer rotor 1 and the inner rotor 2 at the optimum phase for starting. Springs S1 and S2 apply biasing forces in opposite directions to each other, and the starting optimum phase is suitable for engine starting.

[0098] Such as Figures 9A to 12 As shown, the first feature of the structure according to the second embodiment is that the width of the engagement recessed portion 10G of the inner rotor 2 in the circumferential direction is sufficiently larger than the thickness of the inner engagement portion 31 of the coil springs S1 and S2. With the above structure, the respective inner engaging portions 31 engaged to the engaging recessed portion 10G are movable in the circumferential direction in the engag...

no. 3 approach

[0105] Instead of a coil spring, the third embodiment uses two torsion springs S1 and S2 as biasing members for maintaining the relative phase at the optimum phase for starting, as Figure 13 and Figure 14A and 14B shown. A first torsion spring S1 biasing the relative phase toward the advanced angle side is accommodated in the recessed portion 6 a of the front plate 6 , and a second torsion spring S2 biasing the relative phase toward the retarded angle side is accommodated in the recessed portion of the rear plate 7 7a.

[0106] Figure 14A and 14B The state of the corresponding torsion springs S1 and S2 in the optimum phase for starting is shown.

[0107] The outer engaging portions 32 of the torsion springs S1 and S2 are engaged to the engaging recessed portion 6T in a relatively immovable manner in the inner surface of the front plate 6 connected to the outer rotor 1 . However, the inner engaging portions 31 of the torsion springs S1 and S2 are relatively movably eng...

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PUM

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Abstract

A valve opening / closing timing control device includes: a driving side rotational member synchronously rotatable with a crankshaft of an internal combustion engine; a driven side rotational member arranged coaxially with the driving side rotational member and synchronously rotatable with a camshaft that opens and closes any one of intake and exhaust valves of the internal combustion engine; a phase converting mechanism displacing a relative phase between the driving side rotational member and the driven side rotational member to an advanced angle phase side or a retarded angle phase side by distributing an operating fluid to each of two kinds of pressure chambers, the volume of which is complementarily varied by a movable partition; and a biasing member biasing the relative phase toward a predetermined phase suitable for a start-up of the internal combustion engine except for a most advanced angle phase and a most retarded angle phase.

Description

technical field [0001] The present disclosure relates to a valve opening / closing timing control device including: a driving side rotating member capable of rotating synchronously with a crankshaft of an internal combustion engine; a driven side rotating member arranged being coaxial with the drive side rotary member and capable of rotating synchronously with a camshaft that opens and closes at least either one of an intake valve and an exhaust valve of the internal combustion engine; and a phase changing mechanism, the The phase shift mechanism shifts the relative phase between the driving side rotating member and the driven side rotating member by distributing working fluid to each of two kinds of pressure chambers of which The volume of each of them is complementary changed by the movable partition. Background technique [0002] JP-A-2009-074384 (Patent Document 1; Paragraphs 0009 and 0029, relating to a valve opening / closing timing control device, figure 1 , 2 and 3) a...

Claims

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Application Information

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IPC IPC(8): F01L1/34F02D13/02
CPCF01L2001/34483F01L2001/0478F01L1/3442F01L2001/34453
Inventor 小林昌树野中健司
Owner AISIN SEIKI KK
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