JPH0754603Y2 - V-type engine intake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a V-type engine having an improved installability of an intake pipe unit.

[Prior Art] A cylinder block provided with banks arranged opposite to each other at a predetermined sandwich angle, a cylinder head connected to an upper end of the cylinder block, and each bank opening toward a bank facing each other. The intake port provided in the cylinder head so as to communicate with the inside of the cylinder, the insulator made of an elastic member attached to these intake ports, and the intake pipe fitted and attached by inserting one end into this insulator. A V-type engine including an intake pipe unit that is integrated in such a manner that the components intersecting each other in a substantially X shape is known. The intake pipe unit includes one for a carburetor and one for a fuel injection device. Further, the intake pipes constituting the intake pipe unit are diagonally intersecting with each other and the ones attached to the banks on the opposite side, and the insertion direction of each intake pipe with respect to the insulator is the axial direction. Since they match, the direction in which the intake pipe is inserted into the insulator differs for each bank.

[Problems to be Solved by the Invention] In the case of the above structure, in order to mount the intake pipe unit to the cylinder through the insulator, first insert the intake pipe on one side into the insulator on one bank side, and then insert the intake pipe on the other side. It is necessary to insert the intake pipe into the insulator of the opposite bank. Therefore, it is necessary to take time and effort for the mounting work, and to prevent the mounting accuracy from being deteriorated by prying and deforming the insulator when mounting the intake pipe later. Therefore, an object of the present application is to provide an intake device in which the intake pipe unit can be easily installed and the installation accuracy can be easily maintained.

[Means for Solving the Problems] In order to solve the above problems, an intake device for a V-type engine according to the present invention includes a cylinder block having a bank provided at an upper part thereof and opposed to each other at a predetermined sandwich angle, and A cylinder head connected to the upper end, an intake port provided on the cylinder head so as to open toward the bank side facing each other and communicate with the cylinder of each bank, and elastic members attached to these intake ports. V type engine having an insulator and an intake pipe unit in which the intake pipes fitted and attached by inserting one end into the insulator are opposed to each other and are integrated in a state where the intake pipes intersect each other in a substantially X shape. In the above, the axial direction of the intake pipe is different from the inserting direction with respect to the insulator.

[Operation of the Invention] When mounting the intake pipe unit to the cylinder via the insulator, first insert the ends of the intake pipes into the corresponding insulators. At this time, since the axial direction of the intake pipe is different from the insertion direction with respect to the insulator, the end portion of each intake pipe fits into the insulator of each bank without deforming the insulator too much.

[Embodiment] An embodiment of the drawings will be described below. FIG. 1 is a view showing a side surface shape of a skeleton portion of a motorcycle equipped with a V6 engine according to the present invention, where 1 is a front wheel, 2 is a front fork, 3 is a handlebar, 4 is a fuel tank, 5 Is a frame, 6
Is an engine, 7 is a front bank, 8 is a rear bank, 9 is an exhaust pipe, 10 is an intake pipe unit, 11 is a cantilever type rear swing arm, and 12 is a rear wheel.

FIG. 2 is a view showing the left side surface of the engine 6 with its upper part cut away. The outer shape of the engine 6 is assembled from a cylinder block 13, a crankcase 14, a cylinder head 15, a cylinder head cover 16, and an oil pan 17. ing.

A front bank 7 and a rear bank 8 are integrally formed on the upper portion of the cylinder block 13 at a predetermined angle, and a valley is formed between both banks.
18 is formed. A water jacket 19 and a cylinder 20 are provided in each bank. Although not apparent from this figure, three cylinders 20 are provided in each of the front and rear banks 7 and 8, and the cylinders 20 facing each other are arranged offset from each other in the vehicle width direction. A piston 21 (shown only on one side) is slidably accommodated in the cylinder 20, and an end portion of the connecting rod is connected to a crankshaft 22 provided in the crankcase 14 in the width direction. The rotation of the crankshaft 22 is performed by the primary gear 23, the clutch gear 24, and the main gear.
25 (only one of which is displayed) is output to the rear wheel side via the counter gear 26 (same).

The cylinder head 15 is provided with an intake port 27 and an exhaust port 28, and the opening portions on the combustion chamber 29 side are opened and closed by an intake valve 30 and an exhaust valve 31, and each valve 30, 31 is rotated by the cylinder head 15. It is actuated by a cam 32 which is borne in support.

A rubber insulator 33 is screwed to the intake port 27, and the connection end portion of the intake pipe unit 10 is fitted into the insulator 33.

The insulator 33 is a member attached to each intake port 27. As shown in FIG. 3 which is a top view of the insulator 33 and FIG. An insert 34 is provided, and a part thereof projects laterally to form a mounting portion 34a. The mounting portion 34a is bolted to a mounting portion 35 (FIG. 6) which is integrally formed in advance outward from the joint portion of the intake port 27 on the insulator 33 side.
The shape of the insulator 33 in a side view is such that the intake pipe fitting portion 37 above the base portion 36, which is a portion near the mounting portion 34a, is bent, and the axis of the base portion 36 coincides with the axis B of the intake pipe. ing. On the other hand, the axis of the intake pipe fitting portion 37 coincides with the insertion direction C of the intake pipe, and the axis B of the intake pipe and the insertion direction C intersect at an angle θ. Lip 38 inside the intake pipe fitting 37
Further, guide slopes 39 are formed further on the open end side than this.

As for the intake pipe unit 10, its external side surface shape is shown in FIG. 5, and how it is attached to the insulator 33 is shown in FIG.
It is integrated with the fuel injection device, and the front bank side intake pipe 40 and the rear bank side intake pipe 41 intersect in a substantially X shape in a side view, and a set of such intake pipes (in this embodiment, (3 sets) are arranged in a unit in the vehicle width direction. Each intake pipe
An end of the insulator 40 on the insulator 33 side is a fitting portion 42 having an engagement groove formed on the periphery thereof, and a fuel injection device 43 is provided in the vicinity thereof. Further, a common uniaxial shaft 44 passes through the intersection of the intake pipes 40, 41. This shaft 44
The end of is attached to a drum 46 which is rotated by a wire 45. Reference numerals B and C in FIG. 6 are the same as in the case of the insulator 33, which are the axis of the intake pipe and the insertion direction, respectively, and they intersect at an angle θ. The axis of the intake port 27 near the insulator 33 also coincides with the axis B of the intake pipe. Further, as is most apparent in FIG. 6, among the water jackets 15a formed on the cylinder head 15, along the lower side of the intake port 27,
In addition, a rib 15c is provided on a portion 15b to which a large force is applied when the intake pipe unit 10 is attached, to reinforce when the intake pipe unit 10 is attached.

Next, the operation of this embodiment will be described. As shown in FIG. 6, when attaching the intake pipe unit 10 to the cylinder heads 15 on the front and rear banks 7 and 8 through the insulator 33,
First, the fitting portions 42 of the intake pipes 40 and 41 are inserted into the corresponding intake pipe fitting portions 37 of the insulator 33. At this time, only by inserting the intake pipe unit 10 along the intake pipe insertion direction C, the fitting portions 42 and the intake pipe fitting portions 37 of the intake pipes 40 and 41 are parallel to the insertion direction C, respectively. Moreover, since it is different from the axis B of the intake pipe, the insulator 33 is relatively smoothly integrated without being deformed too much, and the vicinity of the insulator 33 of the intake port 27 corresponding to each intake pipe 40, 41. The axis of the part matches and the lip
38 and the engaging groove of the fitting portion 42 engage with each other. Therefore, each intake pipe
40 and 41 can be mounted accurately and securely. Moreover, in this embodiment, a total of six intake pipes 40 and 41 can be attached by one operation.

The present invention is not limited to the above-described embodiment, but can be applied in various ways. For example, the intake pipe unit may be for a carburetor.

[Advantage of the Invention] In the present invention, since the axial direction of the intake pipe and the insertion direction with respect to the insulator are made different, when the intake pipe unit is attached to the cylinder head through the insulator, the insulator is not deformed so much that it is deformed. Can be combined. Therefore, the work of mounting the intake pipe unit in the V-type engine becomes easy and quick, the workability can be improved, and at the same time, the deterioration of the mounting accuracy can be prevented.

[Brief description of drawings]

1 to 6 relate to an embodiment, FIG. 1 is a side view of a skeleton of a motorcycle equipped with the engine of the present embodiment, and FIG. 2 is a left side view of a partially cut-away engine. 3 is a perspective view of an essential part, FIG. 4 is a sectional view taken along the line AA of FIG. 3, FIG. 5 is a side view of the essential part, and FIG. 6 is an assembly view of the essential part. (Explanation of symbols) 6 ... Engine, 7 ... Front bank, 19 ... Rear bank, 10
…… Intake pipe unit, 13 …… Cylinder block, 14 ……
Crankcase, 15 …… Cylinder head, 27 …… Intake port, 33 …… Insulator, 37 …… Intake pipe fitting part, 40 ・
41 …… Intake pipe, 42 …… Mating part. B: intake pipe axis, C: intake pipe insertion direction.

Claims (1)

[Scope of utility model registration request] 1. A cylinder block having banks arranged opposite to each other at a predetermined included angle, a cylinder head connected to an upper end of the cylinder block, and each bank opening toward a bank opposite to each other. The intake port provided in the cylinder head so as to communicate with the inside of the cylinder, the insulator made of an elastic member attached to these intake ports, and the intake pipe fitted and attached by inserting one end into this insulator. In a V-type engine provided with an intake pipe unit that is integrated in such a manner that they intersect with each other in a substantially X shape, the axial direction of the intake pipe and the insertion direction with respect to the insulator are different. Intake device for V-type engine.