JPH09280068A - Auxiliary machinery arrangement structure of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide excellent mounting property without increasing the whole length of an internal combustion engine and prevent the interference with equipment arranged in the circumference when an auxiliary machinery arrangement structure is applied to a slant engine which is put horizontally. SOLUTION: A water pump 7 is arranged on one side of an end of a cylinder block 2, and an alternator 9 is arranged on its outside. A compressor 11 and a power stay pump 13 are arranged on both sides of a cylinder head 3 or a cylinder head cover 4, and an idler pulley 15 is arranged between the alternator 9 and the compressor 11. An endless transmission belt 16 wound around a crank pulley 6 is wound around an alternator pulley 10, the idler pulley 15, a compressor pulley 12, a power stay pump pulley 14, a water pump pulley 8, and the crank pulley 6 in this order toward a lower side in the direction of rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of auxiliary machines in an internal combustion engine.

[0002]

2. Description of the Related Art In a conventional internal combustion engine provided with only a water pump and an alternator, a water pump 23 is arranged on one side (intake side) of a front end of a cylinder block 20 as shown by a solid line in FIG. In addition, an alternator 24 is arranged on one side of the crankshaft 22, and a crank pulley 25 fixed to one end of the crankshaft 22, an alternator pulley 26 fixed to the alternator 24, and a water pump pulley 27 fixed to the water pump 23. An endless transmission belt 28 is wound around the substantially triangular shape.

When an air conditioner or power steering is installed, the compressor 29 is provided on the other side (exhaust side) of the cylinder block 20 as shown by a phantom line in FIG.
However, the power steering pump 30 is provided on the other side of the cylinder head 21.
Are arranged respectively on the second stage crank pulley 31 fixed to the crank shaft 22, the compressor pulley 32 fixed to the compressor 29, and the power steering pulley 33 fixed to the power steering pump 30. 34 is wrapped around.

A similar arrangement configuration is, for example, in Japanese Utility Model Laid-Open No. 63-1.
It is disclosed in Japanese Patent No. 56433 and Japanese Utility Model Laid-Open No. 6-1739.

[0005]

However, in the arrangement structure of the auxiliary equipment as shown in FIG. 2, when the compressor 29 and the power steering pump 30 are arranged, it is necessary to drive them by the second-stage transmission belt 34. Therefore, there is a problem that the total length of the internal combustion engine becomes long, the degree of freedom in arranging the engine room on the vehicle side decreases, and the mountability of the internal combustion engine deteriorates.

Further, as shown in FIG. 3, when the present invention is applied to a horizontal slant engine in which the crank axis is oriented in the left-right direction of the vehicle body and the cylinder axis is largely inclined forward of the vehicle, the alternator 24 is used as an engine. This interferes with the steering gear box 41 located in the upper rear part of the room, and the compressor 29 interferes with the differential 42 and the drive shaft located in the lower rear part of the engine room.

In view of such conventional problems, the present invention is excellent in mountability because the total length of the internal combustion engine is not long, and does not interfere with surrounding equipment when it is applied to a horizontal slant engine. An object of the present invention is to provide an auxiliary machine arrangement structure for an internal combustion engine.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a water pump is arranged on one side of one end of a cylinder block and another first auxiliary machine is arranged on the outer side thereof, and a cylinder head or a cylinder head cover is provided. 2nd and 3rd on each side of
And an idler pulley between the first and second auxiliary machines, and the endless transmission belt wound around the crank pulley is directed toward the lower side in the rotational direction. Auxiliary pulley, idler pulley, second auxiliary pulley, third auxiliary pulley, water pump pulley, crank pulley are wound in this order, and the idler pulley and water pump pulley are wound on the rear side of the transmission belt. By hanging, the water pump and other first to one with a single transmission belt
By driving the third auxiliary machine, shortening the total length of the internal combustion engine to improve the mountability, and not arranging the auxiliary machine on both sides of the crankshaft, it is possible to reduce the surroundings when applied to a horizontal slant engine. I try not to interfere with the equipment.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

In FIG. 1, 1 is an internal combustion engine, 2 is its cylinder block, 3 is a cylinder head, and 4 is a cylinder head cover. Reference numeral 5 is a crank shaft, and a crank pulley 6 is fixed to one end of the internal combustion engine 1 on the front end side.
Reference numeral 7 denotes a water pump disposed on one side of the intake side in the upper part of the cylinder block 2, and a water pump pulley 8 is fixed to a drive shaft of the water pump pulley 8 so as to be flush with the crank pulley 6. Reference numeral 9 denotes an alternator arranged outside the water pump 7, which is attached to the cylinder block 2 via an adjust bar 9a so that the position can be adjusted by swinging the cylinder block 2 in the perspective direction and driving the same. An alternator pulley 10 is fixed to the shaft so as to be located on the same plane as the crank pulley 6. Further, a compressor 11 and a power steering pump 13 for an air conditioner are respectively arranged on one side of the intake side of the cylinder head 3 to the cylinder head cover 4 and the other side of the exhaust side thereof, and the compressor pulley 12 and the power steering pump 13 are respectively provided on their output shafts. The pump pulley 14 is fixed so as to be flush with the crank pulley 6. An idler pulley 15 is arranged on one side of the cylinder head 3 between the alternator 9 and the compressor 11.

Reference numeral 16 denotes an endless transmission belt wound around the crank pulley 6. The lower side of the rotation direction of the transmission belt is wound around the alternator pulley 10, the back side is wound around the idler pulley 15, and then the compressor. It is wound around the pulley 12 and the power steering pump pulley 14, then the water pump pulley 8 is wound around the back side thereof,
After that, it is wound around the crank pulley 6. By disposing the idler pulley 15 in this way and winding the rear side of the transmission belt 11 around the idler pulley 15 and the water pump pulley 8,
The wrapping angle for each pulley is sufficiently secured to ensure the driving reliability. The tension of the transmission belt 11 is adjusted by adjusting the position of the alternator 9.

According to the above configuration, the single transmission belt 1
Since the water pump 7, the alternator 9, the compressor 12, and the power steering pump 14 can be driven by means of 6, the front end portion of the crankshaft 5 is provided with a single-stage crank pulley 6
Need only be fixed, and the total length of the internal combustion engine 1 can be shortened by that much, and the mountability of the internal combustion engine 1 can be improved.

Further, since auxiliary equipments are not arranged on both sides of the crankshaft 5, the steering gear box 41 at the rear upper part of the engine room and the engine room are in a state of being applied to a slant engine installed horizontally as shown in FIG. It does not interfere with the rear differential and drive shaft. Also,
The compressor 11 and the power steering pump 13 do not interfere with the equipment 43 such as the radiator at the front end of the vehicle body.

[0014]

As described above, according to the auxiliary machine arrangement structure of the internal combustion engine of the present invention, the water pump is arranged on one side of one end of the cylinder block and the other first auxiliary machine is arranged on the outside thereof. And the second and third auxiliary machines on both sides of the cylinder head or the cylinder head cover, and the idler pulley between the first and second auxiliary machines. The hung endless transmission belt is directed toward the lower side in the direction of rotation thereof. The first accessory pulley, idler pulley, second accessory pulley, third accessory pulley, water pump pulley, crank pulley. Since the idler pulley and the water pump pulley are wound around the back surface of the transmission belt, the single transmission belt can drive the water pump and other first to third auxiliary machines, and the entire length of the internal combustion engine. Shorter and easier to install It can be improved and the winding angle for each pulley can be sufficiently taken to improve the drive reliability of each accessory, and since auxiliary machines are not arranged on both sides of the crankshaft, it was applied to a horizontally installed slant engine. In this case, the horizontally installed slant engine can be comfortably installed in the engine room without interfering with surrounding equipment.

[Brief description of drawings]

FIG. 1 is an arrangement configuration diagram of an embodiment of an auxiliary equipment arrangement structure for an internal combustion engine of the present invention.

FIG. 2 is an arrangement configuration diagram of an auxiliary equipment arrangement structure of an internal combustion engine of a conventional example.

FIG. 3 is an explanatory diagram of a problem when the invention is applied to a horizontal slant engine and mounted on a vehicle in the conventional example.

[Explanation of symbols]

 2 Cylinder Block 6 Crank Pulley 7 Water Pump 8 Water Pump Pulley 9 Alternator 10 Alternator Pulley 11 Compressor 12 Compressor Pulley 13 Power Steering Pump 14 Power Steering Pump Pulley 15 Idler Pulley 16 Transmission Belt

Claims (1)

[Claims] 1. A water pump is arranged on one side of one end of a cylinder block, and another first auxiliary machine is arranged on the outer side thereof, and a second pump is arranged on both sides of a cylinder head or a cylinder head cover. A third auxiliary device is provided, an idler pulley is provided between the first and second auxiliary devices, and the endless transmission belt wound around the crank pulley is turned toward the lower side in the rotating direction. 1 auxiliary machinery pulley, idler pulley, 2nd
The auxiliary pulley, the third auxiliary pulley, the water pump pulley, and the crank pulley are wound in this order, and the idler pulley and the water pump pulley are wound on the back side of the transmission belt. Auxiliary equipment arrangement structure.