JPS642770B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a V-type internal combustion engine in which a pair of cylinder rows are arranged in a V-shape.

Conventionally, in this type of engine, as shown in U.S. Pat.
A cooling water circulation water pump driven by the crankshaft is installed, and the pump's pair of discharge ports and the inflow ports of both cylinder blocks are connected through dedicated conduits, so the overall piping structure is complex. This makes piping work a hassle. In addition, when installing the engine on the vehicle body in the above vehicle, it is convenient to support the engine in the middle between both cylinder blocks in order to balance the engine, but since the water pump is installed in the middle, There is also the problem that the installation structure cannot be obtained.

The present invention has been proposed in view of the above, and an object of the present invention is to provide a V-type internal combustion engine that can solve all the problems of conventional devices.

In order to achieve this object, the present invention provides a V-type internal combustion engine in which a pair of cylinder rows are arranged in a V-shape. At least a cover mounted on one end surface in the crankshaft direction of each cylinder block in the cylinder row, and a cooling water circulation water pump having a pair of discharge ports and mounted on the one end surface of one cylinder block,
One discharge port is in direct communication with the inflow port opened in the one end surface of the one cylinder block, and the other discharge port is connected to the inflow port opened in the one end surface of the other cylinder block, and the other discharge port is connected to the cover. It is characterized by being communicated via an integrally formed conduit portion.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. C ₁ and C ₂ are two cylinder rows on the left and right,
The cylinder rows C ₁ and C ₂ are arranged in a V-shape to form a V-type multi-cylinder internal combustion engine. Both cylinder rows C ₁ ,
A common crankcase 2 is integrally connected to the lower ends of the cylinder blocks 1 ₁ and 1 ₂ of C ₂ ,
One end of the crankshaft 4 protrudes from a cover 3 which is bridged and attached to one end surface in the crankshaft direction of the crankcase 2 and each cylinder block 1 ₁ , 1 ₂ . A camshaft 5 is disposed as close as possible to the crankshaft 4 between both cylinder rows C ₁ and C ₂ . This camshaft 5 is supported on a connecting part on the inside of the left and right cylinder blocks 1 ₁ and 1 ₂ , and consists of a pair of timing gears 6 and 7 within the cover 3 and a timing chain 8 suspended between them. It is linked to the crankshaft 4 via a timing transmission 9, and is then driven at a reduction ratio of 1/2.

A cooling water circulation water pump 10 is directly attached to one end surface of the left cylinder block ₁₁ in the crankshaft direction, with its drive shaft 11 parallel to the camshaft 5.
A drive shaft 11 of the water pump 10 is rotatably supported by a casing 13 via a bearing 12, and an impeller 14 is fixed to the inner end thereof. The casing 13 is 1
It has one suction port 15 and two discharge ports 16 ₁ , 16 ₂ , the suction port 15 communicates with a radiator 18 via a conduit 17 , and one discharge port 16 ₁ connects to the left cylinder block 1 . The inflow port 19 ₁ opens at one end face in the crankshaft direction of the cylinder block ₁ , and the other discharge port 16 ₂ communicates directly with the crankshaft of the right cylinder block 1 ₂ through a horizontal conduit 20 formed integrally with the cover 3 . It communicates with an inlet 19 ₂ that opens at one end surface in the direction.

A compressor 21 is placed above the water pump 10, and an alternator 22 is placed on the right side of the compressor 21.
In order to drive them by the crankshaft 4, a pulley 25 fixed to the crankshaft 4 and pulleys 26, 27, 28 fixed to each drive shaft 11, 23, 24 are provided with one endless shape. A transmission belt 29 is suspended. 30 is a tension pulley, and 31 is an oil pump for supplying lubricating oil provided in the cover 3, which is driven by the crankshaft 4.

In the above configuration, when the crankshaft 4 rotates, the water pump 10, compressor 21, alternator 22, and oil pump 3 are connected to each other via the transmission belt 29.
1 is driven. In the water pump 10, the impeller 14 rotates together with the drive shaft 11, and the radiator 1
A part of the cooling water sucked into the water pump 10 from 8 is supplied from one discharge port 16 ₁ through an inlet 19 ₁ to a cooling water channel (not shown) formed in the left cylinder block 1 ₁ . The cylinder block ₁₁ is cooled, and the remainder of the cooling water is passed from the other discharge port ₁₆₂ through the conduit section 20 to a cooling channel (not shown) formed in the cylinder block ₁₂ on the right side of the inlet port ₁₉₂ . is supplied to cool the cylinder block ₁₂ .

As described above, according to the present invention, in a V-type internal combustion engine in which a pair of cylinder rows are arranged in a V-shape, both the cylinder rows are The cylinder block includes at least a cover that is attached to one end surface in the crankshaft direction of each cylinder block, and a water pump for circulating cooling water that has a pair of discharge ports and is attached to the one end surface of one of the cylinder blocks. The outlet is in direct communication with an inlet opening on the one end surface of the one cylinder block, and the other outlet is integrally formed in the cover with the inlet opening opening on the one end surface of the other cylinder block. Since the water pump and one cylinder block are connected through a conduit section, the cooling water pipe between the water pump and one cylinder block can be omitted, and the cooling water pipe between the water pump and the other cylinder block can be connected to the timing transmission. A part of the cover (conduit part) also serves as a pipe, which simplifies the piping structure between the water pump and both cylinder blocks, contributing to cost reduction and improvement of piping workability. By integrating the conduit portion into the cover, the conduit portion functions as a reinforcing rib, and the rigidity of the cover can be increased. Furthermore, since the water pump is not located in the middle between both cylinder blocks, when the engine is installed on the vehicle body, it can be supported by a bracket or the like in the middle, and the engine can be installed on the vehicle body in a well-balanced manner.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view, and FIG. 2 is a sectional view taken along the line of FIG. 1. C ₁ , C ₂ ... Cylinder row, 1 ₁ , 1 ₂ ... Cylinder block, 3 ... Cover, 4 ... Crankshaft, 5
...Camshaft, 10...Water pump, 16 ₁ , 16 ₂ ...
...discharge port, 19 ₁ , 19 ₂ ... inlet, 20 ... conduit section.

Claims (1)

[Claims] 1 In a V-type internal combustion engine in which a pair of cylinder rows C ₁ and C ₂ are arranged in a V-shape, both cylinder rows C A cover 3 is attached to one end surface in the crankshaft direction of each cylinder block 1 ₁ , C _{2 ,} and a pair of discharge ports 16 _{1 ,}
16 ₂ and a cooling water circulation water pump 10 mounted on the one end surface of one cylinder block 1 ₁ , one discharge port 16 ₁ is open on the one end surface of one cylinder block 1 ₁ . The other discharge port ₁₆₂ has a conduit portion ₂₀ formed integrally with the cover 3 in direct communication with the inlet port ₁₉₁ that is open to the one end surface of the other cylinder block ₁₂ . A V-type internal combustion engine, characterized in that the V-type internal combustion engine is communicated with each other through a V-type internal combustion engine.