JPH09158746A - Rotation drive device of auxiliary machine in internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid an increase in dimension caused by adding the width of two endless belts to the whole length of an internal combustion engine when at least two auxiliary machines are simultaneously driven through two endless belts by the internal combustion engine. SOLUTION: Three auxiliary machines 13 are arranged on at least one longitudinal side surface 1c of an internal combustion engine, and a first endless belt 19 is wound between one auxiliary machine 13 on one longitudinal side surface and a crank shaft 2, and a second endless belt 24 arranged on an approximate plane as the plane containing a timing chain 8 stretched to the crank shaft 8 and a cam shaft 3 is wound between one auxiliary machine 13 and the rest of the auxiliary machines 14, 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for simultaneously rotating and driving a plurality of accessories such as a cooling water pump, an alternator, an air conditioner compressor and a power steering oil pump by an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, a plurality of auxiliary machines such as a cooling water pump, an alternator, a compressor for an air conditioner, and an oil pump for a power steering are simultaneously driven to rotate.
For example, as described in Japanese Utility Model Laid-Open No. 61-80127, the plurality of auxiliary machines are arranged separately on one longitudinal side surface and the other longitudinal side surface of the internal combustion engine. The auxiliary machine disposed on the longitudinal side surface of the crankshaft is rotationally driven by transmitting power from the crankshaft through a first endless belt wound between these pulleys and a pulley on the crankshaft, while the other one is driven. The auxiliary equipment arranged on the longitudinal side surface is configured to be rotationally driven by transmitting power from the crankshaft via a second endless belt wound between these pulleys and a pulley on the crankshaft.

[0003]

However, in the internal combustion engine, since the cam shaft is originally configured to be rotationally driven by transmitting power from the crank shaft via the timing belt or the timing chain. As in the prior art, the auxiliary machine on one of the longitudinal side surfaces is rotationally driven by transmitting power from the crankshaft via the first endless belt, while the auxiliary machine arranged on the other longitudinal side surface is cranked. In the case where the shaft is rotationally driven by transmitting power from the second endless belt, the timing belt or timing chain for transmitting power to the cam shaft and the power for the auxiliary machine on one longitudinal side surface are used. The first endless belt for transmission and the second endless belt for power transmission to the auxiliary machine on the other longitudinal side face are In other words, the length dimension of the entire internal combustion engine along the crankshaft direction (hereinafter referred to as the engine full-length dimension) includes a timing belt or timing for power transmission to the camshaft. The width dimension of the chain, the width dimension of the first endless belt for the accessory on one longitudinal side surface, and the width dimension of the second endless belt for the accessory on the other longitudinal side surface are added together. However, there has been a problem that the above-mentioned full-length dimension is increased and the internal combustion engine is increased in size.

According to the present invention, three or more auxiliaries are provided for an internal combustion engine, and when the respective auxiliaries are rotationally driven at the same time, it is possible to avoid an increase in the total length. Is a technical issue.

[0005]

In order to achieve this technical object, the present invention relates to an "internal combustion engine comprising a timing belt or a timing chain wound between a crankshaft and a camshaft. Two or more auxiliaries are arranged on at least one of the left and right long side surfaces, and a first power transmission unit is provided between at least one of the respective auxiliary machines and the crankshaft. While the endless belt is wound, a second power-transmitting second endless belt is wound between the at least one auxiliary machine and the remaining auxiliary machines on one longitudinal side surface, and the second endless belt is It is arranged on substantially the same plane as the plane including the timing belt or the timing chain. "

[0006]

In this structure, at least the auxiliary machine on one longitudinal side surface is rotationally driven by the power transmission from the crankshaft via the first endless belt wound between the auxiliary machine and the crankshaft. On the other hand, the remaining auxiliary machinery on one longitudinal side surface is transmitted by the power transmission via the second endless belt wound between this and one auxiliary machinery which is rotationally driven through the first endless belt. It is driven to rotate.

In this case, by disposing the second endless belt on substantially the same plane as the plane including the timing belt or the timing chain, the second engine is wrapped around the crankshaft and the camshaft over the entire engine length. Width dimension of timing belt or timing chain, and first
Only by adding the width dimension of the endless belt, it is possible to avoid adding the width dimension of the second endless belt to the entire engine length.

Therefore, according to the present invention, the overall length of the internal combustion engine can be shortened, and the internal combustion engine can be downsized.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment. In the figure, reference numeral 1 indicates an internal combustion engine including a crankshaft 2 and a camshaft 3, and a front end surface 1 of the internal combustion engine 1 is shown.
The crankshaft 2 and the camshaft 3 are projected to a, a lubricating oil pump 4 is provided, and a small-diameter sprocket 5 fitted to the crankshaft 2 and a large sprocket fitted to the camshaft 3. Diameter sprocket 6 and the lubricating oil pump 4
The timing chain 8 for power transmission is wound around the sprocket 7 fitted to the shaft 4a of the above, and the cam shaft 3 and the lubricating oil pump 4 are rotationally driven by the power transmission from the crank shaft 2. In addition, a cover case 9 that covers the entire timing chain 8 is attached to the front end surface 1a of the internal combustion engine 1.

A portion of the timing chain 8 between the crankshaft 2 and the camshaft 3 is inwardly contacted by a curved guide member 10 whose lower end is rotatably pivoted by a pin 11. It is configured to go in greatly,
Therefore, the cover case 9 that covers the timing chain 8
An inwardly penetrating portion 9a is formed at a portion of the guide member 10 among them. Further, a predetermined tension is applied to the timing chain 8 by pressing the upper end of the guide member 10 inward by the hydraulic chain tensioner mechanism 12.

Left and right long side surfaces 1 of the internal combustion engine 1
The cooling water pump 1 is provided on one of the long side surfaces 1b of b and 1c.
3, the alternator 14, and the power steering oil pump 15 are located inside the portion 9a of the cover case 9 where the cooling water pump 13 enters, and the alternator 14 is located outside and below the cooling water pump 13. Further, the power steering oil pump 15 is disposed outside and above the cooling water pump 13.

An air conditioner compressor 16 is disposed on the other longitudinal side surface 1c of the left and right longitudinal side surfaces 1b and 1c of the internal combustion engine 1. Then, an auxiliary machine pulley 16 is fixed to a protruding portion of the crankshaft 2 from the cover case 9, and the auxiliary machine pulley 16 and a first pulley 17 fixed to a shaft 13a of the cooling water pump 13 are provided. A first endless belt 19 is wound around a pulley 18 fixed to a shaft 16a of the air conditioner compressor 16 to transmit power from the crankshaft 2 to the cooling water pump 13 and the air conditioner compressor. 16
Is configured to be rotationally driven.

In this case, the idle pulley 20 is rotatably provided on the front surface of the cover case 9, and the first endless belt 19 is also wound around the idle pulley 20 so that the first endless belt 19 is wound around the idle pulley 20. 1 endless belt 19
The auxiliary equipment pulley 16 on the crankshaft 2 and the winding angle of the cooling water pump 13 with respect to the first pulley 17 are increased. Further, the air conditioner compressor 16 is attached to the internal combustion engine 1 so as to be movable and adjustable in a direction indicated by an arrow A, so that the tension of the first endless belt 19 is adjusted.

On the other hand, on the shaft 13a of the cooling water pump 13, the second pulley 2 is provided behind the first pulley 17 thereof.
1 is fixed between the second pulley 21, the pulley 22 fixed to the shaft 14a of the alternator 14 and the pulley 23 fixed to the shaft 15a of the power steering oil pump 15, and the second endless belt 24. By wrapping around, the alternator 14 and the power steering oil pump 15 are rotationally driven by power transmission from the cooling water pump 13. And
The second endless belt 24 is arranged in substantially the same plane as the plane including the timing chain 8.

The alternator 14 is attached to the internal combustion engine 1 so as to be movable and adjustable in the direction indicated by the arrow B, so that the tension of the second endless belt 24 is adjusted. In this structure, the cooling water pump 13 arranged on the one longitudinal side surface 1b of the internal combustion engine 1.
And the air conditioner compressor 16 disposed on the other longitudinal side surface 1c between the first pulley 17 of the cooling water pump 13 and the pulley 18 of the air conditioner compressor 16 and the auxiliary machinery pulley 16 on the crankshaft 2. It is rotationally driven by power transmission from the crankshaft 2 via the wound first endless belt 19.

On the other hand, the alternator 14 arranged on one longitudinal side surface 1b and the power steering oil pump 1
5 is a cooling water pump 13 via a second endless belt 24 wound around the pulley 22 of the alternator 14 and the pulley 23 of the power steering oil pump 15 and the second pulley 21 of the cooling water pump 13. It is driven to rotate by power transmission from.

In this case, the second endless belt 2
By disposing 4 on a plane substantially the same as the plane including the timing chain 8, the width of the timing chain wound between the crank shaft and the cam shaft, and the first endless belt 19 in the entire engine length. Only by adding the width dimension, it is possible to avoid adding the width dimension of the second endless belt 24 to the entire engine length.

As in the above embodiment, the portion of the timing chain 8 between the crankshaft 2 and the camshaft 3 is brought inward by bringing the curved guide member 10 into contact therewith. In the cover case 9 that covers the timing chain 8, an inwardly entering portion 9a is formed in the guide member 10 portion, and the cooling water pump 13 is provided.
A part 9a of the cover case 9
By arranging so as to be located inside, the overall width dimension W can be reduced.

FIG. 4 shows a second embodiment. The second embodiment is a case where the cylinder axis C is applied to a slant type internal combustion engine 1'where the cylinder axis C is appropriately inclined by an angle .theta. Also in this case, in the same manner as described above, the left and right long side surfaces 1b ', 1 of the internal combustion engine 1'are also provided.
An alternator 14 'is provided on one lower side 1b' of the c ', and an alternator 14' is provided on the other longer side 1c 'of the upper side.
Cooling water pump 13 ', air conditioner compressor 16'
And an oil pump 15 'for power steering, respectively, and a pulley 16' for an auxiliary machine on the crankshaft 2 ', a pulley 22' for an alternator 14 ', a pulley 17' for a cooling water pump 13 ', and a compressor 16 for an air conditioner. The first endless belt 19 'is wound between the first pulley 18a' and the first pulley 18b 'of the air conditioner compressor 16' and the pulley 23 'of the power steering oil pump 15'. 2nd endless belt between 2
4'is wound around, and the second endless belt 24 'is arranged in substantially the same plane as the plane including the timing chain 8'wound between the crankshaft 2'and the camshaft 3'. It is possible to prevent the width dimension of the second endless belt 24 'from being added to the entire engine length.

Furthermore, in FIG. 5, the cooling water pump 13 ", the power steering oil pump 15", the air conditioner compressor 16 "and the alternator 14" are provided only from one longitudinal side surface 1b "of the internal combustion engine 1" from below. This is the case when they are arranged in order. Also in this case, in the same manner as described above, the accessory pulley 16 ″ on the crankshaft 2 ″
The first endless belt 19 "is wound between the pulley 17" of the cooling water pump 13 ", the pulley 23" of the power steering oil pump 15 "and the first pulley 18a" of the air conditioner compressor 16 ". The second endless belt 24 ″ is wound around the second pulley 18b ″ of the air conditioner compressor 16 ″ and the pulley 22 ″ of the alternator 14 ″, and the second endless belt 24 ″ is attached to the crankshaft 2 The second endless belt 24 ″ is provided over the entire length of the engine by arranging the same on the same plane as the plane including the timing chain 8 ″ wound between the “″ and the cam shaft 3 ″.
It is possible to avoid adding the width dimension at.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is a side view taken along the line III-III in FIG.

FIG. 4 is a front view showing a second embodiment of the present invention.

FIG. 5 is a front view showing a third embodiment of the present invention.

[Explanation of symbols]

1, 1'internal combustion engine 1b, 1c, 1b ', 1c longitudinal side surfaces 2, 2', 2 "crankshaft 3, 3 ', 3" camshaft 8, 8', 8 "timing chain 9 cover case 13, 13 ' , 13 ″ Cooling water pump 14, 14 ′, 14 ″ Alternator 15, 15 ′, 15 ″ Power steering oil pump 16, 16 ′, 16 ″ Air conditioner compressor 19, 19 ′, 19 ″ First endless belt 24, 24 ′, 24 ″ 2nd endless belt

Claims (1)

[Claims] 1. An internal combustion engine having a timing belt or a timing chain wound between a crankshaft and a camshaft, wherein at least one of the left and right longitudinal side surfaces of the internal combustion engine has two or more auxiliary members. A first endless belt for power transmission is wound between the crankshaft and at least one of the auxiliary machines, and the at least one auxiliary machine and one of the auxiliary machines. A second endless belt for power transmission is wound around the remaining auxiliary equipment on the longitudinal side surface of the device, and the second endless belt is arranged on the same plane as the plane including the timing belt or the timing chain. A rotary drive device for an auxiliary machine in an internal combustion engine, characterized by: