Air-suction device of engine
A suction device and engine technology, applied in the direction of engine components, combustion engines, machines/engines, etc., can solve the problems of insufficient vortex formation, reduced mixed gas flow rate, and difficulty in increasing the mixed gas suction flow rate of the combustion chamber, etc.
Inactive Publication Date: 2002-02-27
HONDA MOTOR CO LTD
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Problems solved by technology
[0003] In the above-mentioned existing device, on the back side of the umbrella part of the suction valve, in the inner end of the suction port, a swirling flow around the shaft of the suction valve is formed, and the suction generated at the straight line part on the upstream side of the suction port is mixed. The force of gas, for the small radius of rotation around the above-mentioned shaft, the flow rate of the mixed gas flowing into the combustion chamber from the suction port is greatly reduced
In addition, when the intake valve is opened, the mixed gas swirling on the back side of the umbrella part of the intake valve flows into the combustion chamber from the direction of the cylinder axis, and the swirling direction is different from the suction direction of the combustion chamber, so it is not easy to increase the efficiency of the combustion chamber. Inspiratory air flow rate of the mixed gas, the vortex cannot be fully formed in the combustion chamber
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[0019] Hereinafter, embodiments of the present invention will be described with reference to an embodiment of the present invention shown in the accompanying drawings.
[0020] Figure 1 to Figure 8 An example of the present invention is shown. Fig. 1 is a side view of a two-wheeled motor vehicle. Fig. 2 is a sectional view of the power unit along line 2-2 in Fig. 1 . image 3 It is an enlarged view of line 3-3 in Figure 2. Figure 4 It is the magnified sectional view of line 4-4 in Fig. 2. Figure 5 yes Figure 4 The 5-5 line section diagram. Image 6 yes Figure 5 6-way view in . Figure 7 It is a projected view of the intake port toward a plane perpendicular to the axis of the cylinder bore. Figure 8 yes Figure 5 The 8-8 line section diagram.
[0021] As shown in FIG. 1, a front end of a frame 15 of a motorcycle is provided with a head pipe 16, and a front fork 17 pivotally supporting a front wheel WF is pivotally supported on the head pipe 16 in a steerable mann...
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The invention provides an air-suction device of engine. To form a more powerful swirl stream in a combustion chamber in an intake device for an engine in which a valve seat arranged at an inner end in an intake port generating swirl in the combustion chamber is fixed to a cylinder head at a position deviated from the center of the combustion chamber and a stem of an intake valve is slidably fitted into a guide cylinder provided in the cylinder head coaxially with the center of the valve seat. The intake port 70 on a projection drawing for a plane crossing an axial line of a cylinder bore orthogonally is formed into such shape that has a first passage part 70a extending in the direction of tangent of the guide cylinder 98 on an outer side more than the guide cylinder 98 and a second passage part 70b continuous with the first passage part 70a and curved and tapered so as to wind a part of the guide cylinder 98. An opposing wall 39a covering an umbrella part of the intake valve and the valve seat 97 except a part where it is overlapped on the first and second passage parts 70a, 70b on the projection drawing is provided in the cylinder head 39 by opposing to a part of the umbrella part and the valve seat 97.
Description
technical field [0001] The present invention relates to the air-breathing device of engine, particularly relates to the improvement of engine air-breathing device, in this device, the piston is slidably embedded in the cylinder bore, and the combustion chamber faces the top of the piston, and the cylinder head is provided with the combustion chamber. The suction port where the vortex is generated in the room, the annular valve seat arranged at the inner end of the suction port, is fixed on the cylinder head at a position deviated from the center of the combustion chamber, and has a suction valve that can be seated into the umbrella of the valve seat The shaft rod is slidably fitted in the guide sleeve, and the guide sleeve is arranged on the cylinder head coaxially with the center of the valve seat. Background technique [0002] Such an air suction device in the prior art has, for example, the type disclosed in Japanese Patent Application Laid-Open No. 4-17707. A spiral suc...
Claims
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IPC IPC(8): F02F1/42F02B31/00F02M35/10F02M35/104
CPCY02T10/146Y02T10/12
Inventor菊池一纪饭嶌智司久保田良
OwnerHONDA MOTOR CO LTD