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Rotary throttle valve for spark ignition type internal combustion engine

A spark ignition, internal combustion engine technology, applied in mechanical equipment, engine components, engine control, etc., can solve problems such as increasing flow resistance and pressure loss, and achieve the effect of reducing flow resistance and pressure loss

Inactive Publication Date: 2004-09-08
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned rotary body type throttle valve, since there is no obstacle in the flow passage, the flow in the closed state is ideal, but in the half-open state, the outer side wall parts 06a, 06b of the channel 05 are as follows: Figure 15 Protrude into the flow path as shown, on the other hand, when the valve is fully open, the cylindrical recess 02d of the valve housing 01 that accommodates the outer side wall portions 06a, 06b is exposed in the flow path, thus generating vortices a, b, c, d, resulting in increased flow resistance and pressure loss

Method used

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  • Rotary throttle valve for spark ignition type internal combustion engine
  • Rotary throttle valve for spark ignition type internal combustion engine
  • Rotary throttle valve for spark ignition type internal combustion engine

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Hereinafter, the embodiment of this invention application is demonstrated based on drawing.

[0035] figure 1 It is a front view showing the closed state of the rotary throttle valve according to an embodiment of the present invention ( figure 2 The view in the direction of the I-I arrow), figure 2 yes figure 1 A cross-sectional view in the direction of the II-II arrow, image 3 is also a cross-sectional view showing the closed state, Figure 4 It is also a sectional view showing a half-open state, and Fig. 5 is image 3 Cross-sectional view in the direction of the V-V arrow.

[0036] In these figures, 11 is a valve casing, and suction passages 12a, 12b are formed in the valve casing. In the above-mentioned valve case 11, a cylindrical recess 12d having an axis line 24 intersecting the central axis 12c of the suction passages 12a, 12b is formed, and the cylindrical valve body 13 is rotatably embedded in the circle around the axis 14. inside the cylindrical re...

Embodiment 2

[0043] Subsequently, Figure 6 It is a front view (view in the VI-VI arrow direction of FIG. 7 ) that represents another embodiment of the application for the present invention in a closed state of a rotary throttle valve. FIG. 7 is Figure 6 The cross-sectional view in the direction of the arrow VII-VII, Figure 8 is also a cross-sectional view showing the fully open state, Figure 9 It is also a cross-sectional view showing a half-open state, Figure 10 It is a cross-sectional view in the X-X arrow direction of FIG. 8 .

[0044] In these figures, 21 is a valve casing, and suction passages 22a, 22b are formed in the valve casing. In the valve housing 21, a cylindrical recess 22d is formed with the axis 14 intersecting the central axis 22c of the suction passages 22a, 22b as the axis, and the cylindrical valve body 23 is rotatably embedded in the cylinder around the axis 24. inside the shaped recess. Furthermore, the valve body 23 is provided with a passage 25 communicating...

Embodiment 3

[0049] Subsequently, Figure 11 is a cross-sectional view showing a half-open state in another embodiment of the present invention. In this embodiment, like the first embodiment, the channel 35 of the valve body 33 points to the direction intersecting with the central axis 35a of the channel and runs through one 36a of the two opposite valve walls 36a, 36b to open a passage valve. The through hole 38 on the rotating outer surface of the body 33. Like the second embodiment, on the two positions of the inclined wall surface of the conical inflow passage 32a, a plane parallel to the central axis 32c and the valve rotation axis 34 including the upstream suction passage is opened and the depth does not exceed the valve. The grooves 39a, 39b of the valve wall 36a, 36b thickness of the body 33.

[0050] As a result, in the half-open state, all of the eddy currents a, b, and c are reduced, thereby reducing flow resistance.

[0051] Although the above-mentioned embodiments of the pr...

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Abstract

A rotary-body type throttle valve for a spark ignition internal combustion engine is disclosed. The valve includes a valve casing, an intake passage formed with a rotary-body recess portion, a valve element having a rotary-body shape which is rotatably fitted into the rotary-body recess portion of the valve casing, and a communication passage that permits an upstream intake passage and a downstream intake passage to communicate with each other is formed in the valve element. The upstream intake passage and the downstream intake passage sandwich the rotary-body recess portion of the valve casing. A through hole which is directed from the communication passage of the valve element in a direction intersecting a central axis of the communication passage and reaches only one of rotary outer surfaces of the valve element is formed in the valve element.

Description

technical field [0001] The invention relates to a rotary throttle valve of a spark ignition type internal combustion engine, in particular to a rotary throttle valve for reducing flow resistance. Background technique [0002] Conventionally, various throttle valves have been proposed and implemented in Japanese Patent Application Laid-Open No. 4-47396 as a rotary throttle valve for a spark ignition type internal combustion engine. [0003] Figure 12 It is a front view (view in the XII-XII arrow direction of FIG. 13 ) showing an example of such a conventional rotary throttle valve, and FIG. 13 is Figure 12 The cross-sectional view in the direction of the XIII-XIII arrow, Figure 14 is also a cross-sectional view showing the closed state of the valve, Figure 15 It is also a cross-sectional view showing a half-closed state of the valve. [0004] In these figures, 01 is a valve casing, and suction passages 02a, 02b are formed in the valve casing. In the above-mentioned valve...

Claims

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Application Information

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IPC IPC(8): F02D9/10F02D9/16F02M9/08
CPCF02D9/16
Inventor 铃木修高桥易资
Owner HONDA MOTOR CO LTD
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