JP3562183B2 - V-type engine intake device for motorcycles - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an intake device for a V-type engine for a motorcycle.
[0002]
[Prior art]
Motorcycles are sometimes equipped with a V-type engine for power. The V-type engine has cylinders arranged in a V-type front and rear. As the intake air taken in by the engine, air that has been cleaned by removing dust with an air cleaner is used.
[0003]
FIG. 9 is a view showing an example of a conventional cleaner box, in which an inlet B is provided on the front upper side of a cleaner box A, a filter C is arranged diagonally, and an outlet tube connected to the front and rear throttle bodies before and after the lower surface. D is provided.
[0004]
FIG. 10 shows another embodiment of the conventional cleaner box. There is a chamber F containing a filter F1 protruding downward at the center of the lower surface of the cleaner box E, and has a suction port toward the rear of the lower end. G is provided, and an outlet tube H is provided before and after a portion widened before and after the cleaner box E so as to be connected to the front and rear throttle bodies J. (See JP-A-55-46007)
[0005]
[Problems to be solved by the invention]
In FIG. 9, since the filter C is arranged obliquely, the volume on the clean air side below the filter C is small, and the front outlet tube D is close to the suction port B, The outlet tube D is far from the suction port B. For this reason, the intake air amounts of the front and rear outlet cylinders D become non-uniform, and a difference in output occurs between the front and rear cylinders.
[0006]
In the configuration shown in FIG. 10, the distance from the filter F1 to the front and rear outlet tubes H can be made equal, and the intake air amount of the front and rear outlet tubes H can be made uniform. However, the suction port G at the lower end is close to the cylinder, and the air heated by the heat of the cylinder is sucked, so that the air density is reduced and the output is disadvantageously reduced.
In addition, since there is a chamber between the two outlet tubes D, there is a problem that a lot of space is required for arrangement with the air cleaner.
[0007]
In view of this point, the present invention provides a high-output and a compact arrangement of the cleaner box. It is an object of the present invention to obtain an intake device for a V-type engine for a motorcycle that can perform the operation.
[0008]
[Means for Solving the Problems]
Means for Solving the Problems To achieve the above object, an intake device for a V-type engine for a motorcycle according to the present invention is provided with a chamber protruding downward toward the center of the lower surface of the cleaner box in the front-rear direction and to one side in the left-right width direction. mounting the filter tube surrounding the chamber upper to the lower surface inwardly, connected to the front and rear of the throttle body and their outlet tube provided with an outlet tube, respectively before and after the lower surface of the cleaner box, cast the chamber bottom from the lower end of the throttle body to the lower The intake ducts are connected to the lower end of the throttle body on both sides of the chamber, and the left and right intake ducts are connected to the intake port on the front of the cowling, while on the opposite side in the width direction where the chamber is moved. The front and rear throttle bodies are connected to each other, and one of the left and right intake ducts is Lies in the provision through below the concatenated throttle body.
[0009]
In the present invention, the cleaner box has a large volume on the clean air side behind the filter cylinder, the length from the filter cylinder to the front and rear outlet cylinders is equal, and the suction amount of the front and rear outlet cylinders can be equalized. The output of the cylinder can be the same. In addition, the intake ducts connected to the left and right sides of the chamber extend forward, not only do not inhale the air whose air density has become low due to the warming of the cylinder, but also connect to the intake port on the front of the cowling. As a result, the wind received by the traveling is pushed in, the supercharging can be performed, and a high output can be obtained.

[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the engine 1 is a V-type engine in which cylinders are arranged in a front and rear V-shape, and a cleaner box 3 is arranged above the front and rear cylinders 2.
As shown in FIG. 2 to FIG. 4, the cleaner box 3 is moved toward one side of the center of the lower surface of the cleaner box 3 and protruded downward to provide a chamber 4. The lower surface of the cleaner box 3 surrounds the upper surface of the chamber 4. Attach the filter tube 5. The filter tube 5 can be inspected and replaced by removing the cap 6 on the upper surface. An outlet tube 7 is provided around the lower surface of the cleaner box 3. The upper end of a throttle body 8 connected to the upper side of the front and rear cylinders 2 is connected to the front and rear outlet cylinders 7.
[0011]
The front and rear throttle bodies 8 are connected to the upper side of the cylinder 2 and the front and rear throttle bodies 8 are connected to a connecting plate 9 as shown in FIGS. The reason why the chamber 4 is moved to one side of the cleaner box 3 as shown in FIG. 4 is that the chamber 4 avoids the connecting plate 9 as shown in FIG.
[0012]
The chamber 4 extends below the lower ends of the front and rear throttle bodies 8 through the side of the connecting plate 9 as shown in FIG. An intake duct 10 is provided on both sides of the chamber 4 near the height of the lower end of the throttle body 8. As shown in FIG. 5, the left and right intake ducts 10 are communicated by intake tubes 11 to intake ports 13 provided on the right and left front surfaces of a cowling 12 covering the front part of the vehicle body.
[0013]
The intake air flows from the left and right intake ports 13 of the cowling 12 through the intake tube 11 to the chamber 4 through the intake duct 10. Then, when the dust passes through the filter tube 5 from the chamber 4, the dust is filtered and becomes clean air, flows into the cleaner box 3, is divided into front and rear, passes through the front and rear outlet tubes 7, is sucked into the throttle body 8, and Enter cylinder 2. The cleaner box 3 can secure a sufficient volume, can equalize the distance between the front and rear outlet cylinders 7 and the filter cylinder 5, and can equalize the intake air amount of the front and rear outlet cylinders 7. During traveling, the wind received during traveling can be pushed into the intake port 13 of the cowling 12 and supercharged. Since the intake port 13 is provided on the front surface of the cowling 12, the heat of the front and rear cylinders 2 is increased. Never inhale warm air.
[0014]
【The invention's effect】
As described above, according to the present invention, the chamber is formed below the cleaner box, and the clean air chamber portion on the rear side of the filter tube can secure the volume while forming the cleaner box compactly. The distance between the cylinders is equal, and the intake can be evenly sucked into the front and rear outlet cylinders.
[0015]
In addition, since the intake ducts are provided on the left and right sides of the chamber, intake can be performed from both sides, so that intake resistance is small and engine response is improved. Since the suction port is provided on the front surface of the cowling, the air density can be secured and the output can be improved without inhaling heated air near the cylinder. Then, during traveling, the wind received during traveling can be pushed in from the suction port and supercharged, and the output can be improved in this aspect as well.
[0016]
Furthermore, since the intake ducts are provided on the left and right, the thickness of the intake duct and the intake tube can be reduced, and piping inside the cowling can be facilitated. The volume of the cleaner box can be increased by the amount of the chamber provided on the lower side, and the cleaner box is compactly housed in the undercut of the fuel tank that is mounted on the frame, making it easy to check and replace the filter cylinder.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which a cleaner box is attached to an engine according to an embodiment of the present invention.
FIG. 2 is a vertical sectional side view of a cleaner box showing the embodiment of the present invention.
FIG. 3 is a partially cutaway plan view of a cleaner box according to the embodiment of the present invention.
FIG. 4 is a rear view of the cleaner box showing the embodiment of the present invention, in which a chamber and an intake duct portion are cut away.
FIG. 5 is a plan view showing a relationship from an inlet to a chamber according to the embodiment of the present invention.
FIG. 6 is a side view of the front and rear throttle bodies showing the embodiment of the present invention.
FIG. 7 is a plan view of a throttle body before and after showing an embodiment of the present invention.
FIG. 8 is a side view of the entire motorcycle showing the embodiment of the present invention.
FIG. 9 is a vertical sectional side view showing an example of a conventional cleaner box.
FIG. 10 is a vertical sectional side view showing another example of the conventional cleaner box.
[Explanation of symbols]
3 Cleaner Box 4 Chamber 5 Filter Tube 7 Outlet Tube 8 Throttle Body 10 Intake Duct 12 Cowling 13 Intake Port

Claims (1)

Provide a chamber that protrudes downward toward the center in the front-rear direction and one side in the left-right width direction on the lower surface of the cleaner box, attach a filter tube surrounding the upper side of the chamber inside the lower surface of the cleaner box, and install an outlet tube on each of the front and rear lower surfaces of the cleaner box. their outlet tube connected to the front and rear of the throttle body provided with a chamber bottom cast from the lower end of the throttle body to the lower, and continuously provided to the intake duct in the vicinity of the lower end height of the throttle body on both sides of the chamber, the left and right While connecting the intake duct of the front side of the cowling to the intake port of the front of the cowling, the front and rear throttle bodies are connected to each other on the opposite side of the left and right width direction to which the chamber is moved, and one of the left and right intake ducts is self characterized by providing through below the linked throttle body Intake system for a V-type engine for a motorcycle.

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