JPS5851247A - Water-cooled multi-cylinder internal-combustion engine - Google Patents

Abstract

PURPOSE:To permit a compact arrangement of a cooling water pipe by a method wherein suction ports are arranged alternately in the direction of a crank shaft so that the axial lines thereof are not intersecting each other when they are seen from the upper part thereof, in the V-type water-cooled multi-cylinder internal-combustion engine. CONSTITUTION:The suction ports 28 and water discharging ports P1-P4, communicating with the water jackets of each cylinders 101, 102, are opened respectively on the opposing side surfaces of two sets of engine blocks arranged in an orthogonal direction of the axial line of the crank shaft for the V-type water-cooled multi-cylinder internal-combustion engine so as to be inclined into a V-shape each other. In this case, each suction ports 28 are arranged in zig zag in the direction of the crank shaft 4 so that the central axial lines thereof are not intersecting when they are seen from the upper part of a V-shaped space C. Said water discharging ports P1-P4 are formed in a recess R1 formed between a cam chamber 9 and the suction ports 28 or the recess R2 formed between the suction ports and the stad bolts 7 for each blocks 1, 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water-cooled multi-cylinder internal combustion engine, particularly to the engine suitable for use in a motorcycle.

In a water-cooled multi-cylinder internal combustion engine, the coolant jacket formed in the engine block and the cooling water piping that connects the radiator are arranged as compactly and as close to the engine block as possible to avoid interference with other parts. At the same time, it is required to make the layout and installation of other equipment easier, to make it difficult for combustion heat to escape from the internal combustion engine, and to prevent air from forming in the water jacket of the engine block.

Therefore, the present invention satisfies all of the above requirements.
The main objective is to provide a water-cooled multi-cylinder internal combustion engine.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In Fig. 1, a water-cooled V-type multi-cylinder internal combustion engine E is mounted horizontally on a body frame F of a motorcycle (its crankshaft 4
is mounted in the longitudinal direction of the vehicle body frame F and in the direction FM, '5Z), and this internal combustion engine E is mounted on a first engine block 1 which is inclined toward the front of the vehicle body frame F, and a first engine block 1 which is inclined toward the rear of the vehicle body frame F. It has a second engine block 2, and a power unit case 3 which is connected to the lower part of both engine blocks 1 and 2 and has a crankcase housing integrated therein. A V-shaped space C is formed between the second engine blocks 1 and 2 when viewed from the side.

The engine blocks 1 and 2 of the first 'M2 are constructed by integrally connecting a cylinder head '6 on a cylinder block 5 with a plurality of stud bolts 7 . . . as usual. Each engine block 1゜2 has a cam chamber 9 housing a valve train cam drive mechanism 8 disposed in the center in the 4-direction direction of the crankshaft, and cylinders IQ, 101! Each cylinder 10+, 102 has four valves, namely two intake valves 11, 11 and exhaust valves 12, 12.
11 is located on the V-shaped space C side, and the exhaust valves 12 and 12 are located on the side facing away from the space C.

A generator 13 driven by the crankshaft 4 is disposed on one side of the power unit case 3, and a cooling water pump 14 also driven by the crankshaft 4 is disposed behind the generator 13. A suction pipe 17 and a discharge pipe 18 are connected to the suction port 15 and discharge port 16 of the cooling water pump 14, respectively.The suction pipe 17 wraps around the lower surface of the generator 13 and then connects to the down tube of the vehicle body frame The discharge pipe 18 also extends forward along the lower surface of the generator 13 and its open end communicates with an outlet 20 of a radiator 19 provided at the front of the vehicle body frame F. But first. The cooling water in the cooling water distribution part 22 is communicated with the cooling water distribution part 22 formed in the valley of the V-shaped space C between the second engine blocks 1.2, and the cooling water in the cooling water distribution part 22 is communicated with the left and right first engine blocks. The water is directly supplied to the water jacket of one of the cylinders 101 and 102 in the second engine blocks 1 and 2, and is further supplied to the other cylinder 101 through the cooling water pipe 23.
, 102 is distributed and supplied to the water jacket around the water jacket.

No. 1. i2 cooling water drainage ports of engine blocks 1 and 2) Pi-P2 and P3. ', P4 are respectively opened in the cylinder head 6.6 on the V-shaped space C side of those blocks 1, 2, and their drainage bows) Pi, P2 and P3, P4 are respectively opened in the reflux pipe 24, 25 and the cylinder head 6.6 on the side of the V-shaped space C. It is connected to the inlet 21 of the radiator 19 via flexible water pipes 26 and 27.

6- By the way, the present invention allows the recirculation pipes 24, 25 to be arranged as compactly as possible as close as possible to the engine blocks 1 and 2, and moreover, to receive the combustion heat from the engine E, and to connect each engine block 1. 2 to prevent air from forming inside.

The m11i2 engine blocks 1 and 2 are slightly offset from each other in the direction of the crankshaft 4, and each engine block 1.
2 has a cam chamber 9.9 formed in the center in the 4-direction of the crankshaft in which the valve-operating cam drive mechanism 8 is housed. ε! ”
y 1 + On opposite sides of the second engine blocks 1 and 2, there is an intake boat 28 that communicates with the combustion chamber of the cylinder.
, 28... are opened, and their intake ports) 28.28
..., the axis passing through their centers is V as shown in Figure 2.
When viewed from above the character-shaped space C, the crankshafts are laid out in four directions so as not to cross each other, and the inlet boats 28 and 28 are connected to the intake boats 28 and 28.
The hA intake pipe and carburetor are easier to place. And the cooling water drainage ports P, , P2: P3 , , R4
For example, the cam chamber 9 and the intake boat 28 - or the intake boat 28 and the first. It is opened in the recess R1 or R2 formed between the stud bolts 7 of the second engine blocks 1 and 2, and the other end of the discharge pipe 24.25 is connected to the inlet 21 of the radiator 190 via the water guide pipe 26.27. Connected.

When the cooling water pump 14 is driven by engine operation, the pressurized cooling water from the pump 14 reaches the cooling water distribution section 22 via the discharge pipe 18, and from there directly or by valving the distribution pipe 23, the pressurized cooling water is delivered to each cylinder. 10・1.10□Water flows into the surrounding jacket M】,, 2nd engine block 1
After cooling the drainage boats p, , p2; R3,
From R4, reflux pipes 24, 25, water guide pipes 26, 27
The cooling water is led to the radiator 19 through the suction pipe 17 and cooled by the radiator 19 to the cooling water pump 14.
is refluxed to.

As described above, according to the present invention, the opposed cylinder heads 111 of two engine blocks arranged in a V-shape
In a V-shaped water-cooled multi-cylinder internal combustion engine that has a plurality of intake boats and a plurality of drainage boats opened on its surface, the axis of the eight or so intake boats of two engine blocks is shown from above the V-shaped space. The drain ports are arranged so as to move in the crankshaft direction so that they do not intersect with each other, and the drain ports are arranged in the four parts formed between the cam chamber and the intake boat, and between the intake boat and the stand bolt for connecting the engine block. Therefore, even though the water distribution boat was opened in a high position of the engine block, that is, in the cylinder head, the cooling water pipe connected to the drainage port could be connected without interfering with other equipment such as the carburetor. It can be compactly placed as close as possible to the engine block, making it easier to lay out and install other equipment, and the cooling water pipes can be moved away from the combustion section of the engine block to avoid excessive heating. is prevented.

Furthermore, since the drainage port opens into the cylinder head located high in the water jacket of the engine block, no air pockets will form within the water jacket.

[Brief explanation of drawings]

FIG. 1 is a side view of a motorcycle equipped with an internal combustion engine of the present invention;
FIG. 2 is a plan view of the internal combustion engine of the present invention, and FIG. 3 is a cross-sectional view of a portion thereof. P1 to P4... Drainage port, R,, R2... Recessed part,
-1〇- 1.2...ml, F2 engine block, 4...
・Crankshaft, 6... Cylinder block, 7... Stud bolt, 8... Valve train cam drive mechanism, 9... Cam chamber, 10+, 102... Cylinder, 28
... Intake boat patent applicant Honda Motor Co., Ltd. 11- Procedural amendments (blurred) January 29, 1980 Commissioner of the Patent Office A. Mr. Haruki I1, Indication of the case 1982 Patent application no. No. 148183 No. 3, Relationship with the person making the amendment Patent applicant name (532) Honda Motor Co., Ltd. 4, Agent 104 Telephone Tokyo 543-5873 5, Date of amendment order January 5, 1980 ( Shipping date: January 26, 1982)
6. All drawings to be corrected 271-

Claims (1)

[Claims] Connect the two engine blocks (1, 2) to the crankshaft (4)
The engine blocks (1, 2) are arranged so as to be inclined to each other in a V-shape in a direction perpendicular to the axis of the engine blocks (1, 2).
4) A cam chamber (9) housing a valve train cam drive mechanism (8) in the central part thereof is provided with cylinders (10, 102) on both sides of the cam chamber (9), and is connected to two engine blocks (1, 2). On opposite sides of the cylinder head (6, 6), there are intake ports (28, 28...) that communicate with the combustion chamber of each cylinder (101, 102), and drainage ports (P) that communicate with the water jacket of each cylinder. In a water-cooled multi-cylinder internal combustion engine, the plurality of intake ports (28, 28...) of the two engine blocks (1, 2) are opened above the V-shaped space. When viewed from above, the cam chambers (9) are arranged in parallel in the four directions of the crankshaft so that their axes do not intersect with each other, and the cam chambers (9), ! : Four portions (R1, R2) formed between the intake ports (28) and between the intake ports (28) and the stand bolts (7) for connecting the engine blocks (1, 2).
A water-cooled multi-cylinder internal combustion engine, wherein the drainage ports ) ('Pi to P4) are respectively arranged in the drain ports ('Pi to P4).