JPH09280067A - Auxiliary machinery arrangement structure of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the mounting property of an internal combustion engine without increasing the whole length and the whole width of the internal combustion engine in a condition in which auxiliary machinery is provided and ensure crash stroke sufficiently. SOLUTION: A water pump 7 is arranged on one side for a virtual plan 1a which passes a crank shaft axis and a cylinder shaft axis at one end of a cylinder block 2, and an alternator 9 and auxiliary machinery such as a compressor for air conditioner are arranged on one side of the cylinder block 2. A lower side in the direction of rotation of an endless transmission belt 11 wound around a crank pulley 6 is wound around pulleys 9... of the other auxiliary machinery sequentially, wound around a rear surface of 8 water pump pulley 8, and then wound around the crank pulley 6 so that each auxiliary machinery is driven by the transmission belt 11 at one step and the auxiliary machinery is arranged on one side of the cylinder block 2.

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, as shown in FIG. 5, a water pump 23 is arranged at one front end (intake side) of a cylinder block 21. Crankshaft 2
An alternator 24 is disposed on one side of the second pulley 2. An endless transmission belt 28 having a substantially triangular shape is wound around a crank pulley 25, an alternator pulley 26, and a water pump pulley 27. When the air conditioner is mounted, as shown in FIG. 6, the compressor 29 is arranged on the other side of the cylinder block 21, and is fixed to the second-stage pulley 30 fixed to the crankshaft 22 and the compressor 29. A second stage transmission belt 32 is wound around the compressor pulley 31. 5 and 6, the other side of the cylinder block 21 is an exhaust side, and an exhaust pipe 33 is arranged as shown by a broken line.

[0003]

However, in the above-mentioned auxiliary equipment arrangement structure, in addition to the water pump 23 and the alternator 24, auxiliary equipment such as the compressor 29 and the power steering pump are installed due to the specifications for mounting the air conditioner and the power steering. Is required to be driven by the second-stage transmission belt 32, the total length of the internal combustion engine becomes long, and the degree of freedom in arranging the engine room on the vehicle side decreases, so that the internal combustion engine can be mounted easily. And the alternator 24 and the compressor 29 are connected to the cylinder block 2 as shown in FIG.
Since they are arranged on both sides of the internal combustion engine 1, the overall width of the internal combustion engine becomes large, and when the internal combustion engine is mounted horizontally with its crank axis centered in the left-right direction of the vehicle, the internal combustion engine is directed from the internal combustion engine main body to the vehicle front side by the compressor 29. A length of l is hard to protrude, the effective crash stroke that is the absorption zone at the time of a crash is reduced accordingly, it becomes difficult to secure a sufficient crash stroke, and the degree of freedom for ensuring safety is reduced. was there.

In Japanese Utility Model Laid-Open No. 64-15727, a water pump, an alternator, and a power steering pump are configured to be driven by a first-stage transmission belt, and for that purpose, a water pump pulley is provided with a rear surface of the transmission belt. Although it is disclosed that the internal combustion engine is wound and driven, since the alternator and the power steering pump are arranged on both sides of the cylinder block, the entire width of the internal combustion engine is wide, and the degree of freedom for ensuring safety is small like the above. There is a problem.

In view of such conventional problems, the present invention does not increase the total length and width of the internal combustion engine even when an auxiliary machine is provided in addition to the water pump and the alternator, and improves the mountability of the internal combustion engine. An object of the present invention is to provide an auxiliary machine arrangement structure of an internal combustion engine that can sufficiently secure a crash stroke.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a water pump is arranged on one side with respect to an imaginary plane passing through a crank shaft core and a cylinder shaft core at one end of the cylinder block, and one side of the cylinder block. One or more other accessories are installed on one side, and the lower side in the direction of rotation of the endless transmission belt wound around the crank pulley is sequentially wound around the pulleys of other accessories, and the back surface is attached to the water pump pulley. By winding and wrapping around the crank pulley, each auxiliary machine is driven by the one-stage transmission belt to shorten the total length of the internal combustion engine and improve the mountability of the internal combustion engine, and to the one side of the cylinder block. By arranging each accessory, the full width of the internal combustion engine was not increased and a sufficient crash stroke was secured.

[0007]

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 FIGS.

FIG. 1 shows a state in which only a water pump and an alternator are provided as auxiliary machines. 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. 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. 7 is a cylinder block 2
Is a water pump arranged on one side (intake side) with respect to an imaginary plane 1a passing through the crank axis center and the cylinder axis center at the front end portion of the water pump pulley 8, and the water pump pulley 8 is the same as the crank pulley 6 on its drive shaft. It is fixed so that it lies on a plane. Reference numeral 9 denotes an alternator disposed obliquely above the water pump 7 and below the intake system on one side of the cylinder block 2. The alternator 9 can be oscillated in the perspective direction with respect to the cylinder block 2 to adjust its position. It is attached to the cylinder block 2 via 9a, and an alternator pulley 10 is fixed to its drive shaft so as to be located in the same plane as the crank pulley 6.

Reference numeral 11 denotes an endless transmission belt wound around the crank pulley 6. The lower side in the rotational direction is wound around the alternator pulley 10 and then the water pump pulley 8 is wound around the rear side. It is wound around the crank pulley 6. By thus winding the back side of the transmission belt 11 around the water pump pulley 8, the wrap angle of the transmission belt 11 with respect to the crank pulley 6 and the alternator pulley 10 is 180 ° or more, and the wrap angle with respect to the water pump pulley 8 is increased. It is also big and secures reliability. The tension of the transmission belt 11 is adjusted by adjusting the position of the alternator 9.

FIG. 2 shows a case where an air conditioner is mounted, and FIG.
2 shows a state in which a compressor 12 for an air conditioner is added to the basic arrangement of FIG. In FIG. 2, the compressor 12 is arranged on one side of the crankshaft 5, and the compressor pulley 13 is fixed to the drive shaft so that the compressor pulley 13 is located in the same plane as the crank pulley 6. Then, the transmission belt 11 is wound around the compressor pulley 13 from the crank pulley 6, and then the alternator pulley 10,
The water pump pulley 8 and the crank pulley 6 are wound in this order. The tension adjustment of the transmission belt 11 in this case is also performed by adjusting the position of the alternator 9 as in the case of FIG. 1, and only one type of the adjusting bar 9a may be provided regardless of the presence or absence of the compressor 12.

According to the above configuration, the one-stage transmission belt 1
Since the water pump 7, the alternator 9, and the compressor 12 can be driven by 1, it is only necessary to fix the one-stage crank pulley 6 to the front end portion of the crankshaft 5, and the total length of the internal combustion engine 1 can be shortened by that much. The mountability of the engine 1 is improved.

Further, when the internal combustion engine 1 is applied to an FF vehicle and mounted horizontally, as shown in FIG. 3, the water pump 7, the alternator 9, and the compressor are provided on the intake side which is the vehicle rear side of the cylinder block 2. Since the internal combustion engine 1 does not have a large overall width, the effective crash stroke S1 can be sufficiently secured between the exhaust side of the cylinder block 2, which is the vehicle front side, and the radiator 18 at the vehicle front end. it can.

Further, since the alternator 9 is relatively small, the effective crash stroke S2 can be secured between the alternator 9 and the brake booster 19 even if the alternator 9 is disposed obliquely above the water pump 7, and the compressor 12 is disposed at a position. In many cases, it is a differential arrangement portion, and an effective crash stroke S3 can be secured between it and the front end of the vehicle compartment. In FIG. 3, 20 is an exhaust pipe.

Further, in the explosion stroke during operation of the internal combustion engine 1, a downward maximum load acts between the bearings of the crankshaft 5, and accordingly, one end of the crankshaft 5 outside the bearing fulcrum is displaced upward. , The transmission belt 11 to the crank pulley 6
The direction of the load applied at is almost horizontal as shown by the black arrow in FIGS. 1 and 2, and the bending direction is horizontal. Therefore, the bending directions of the two do not overlap, which is advantageous for the bending of the crankshaft and the vibration system.

In the above embodiment, when the power steering is further mounted, it is necessary to dispose the power steering pump. In that case, as shown in FIG. 4, the power steering pump 14 is replaced with the power steering pump 14 shown in FIGS. C) and the second stage crank pulley 1 on the crankshaft 5.
5 is fixed, and the second-stage transmission belt 17 is wound around the power steering pump pulley 16.

Also in this case, the power steering pump 14
Since it is relatively small, it has a high degree of freedom of arrangement and can be arranged at any of the above positions (A) to (C) according to vehicle requirements, and has a small effect on the crash stroke.

[0017]

According to the auxiliary equipment arrangement structure of the internal combustion engine of the present invention, the water pump is arranged on one side with respect to the virtual plane passing through the crank shaft core and the cylinder shaft core at one end of the cylinder block, and One or more other auxiliary machines are arranged on one side of the cylinder block, and the lower side in the rotational direction of the endless transmission belt wound around the crank pulley is sequentially wound around the pulleys of the other auxiliary machines, and the water is removed. Since the back is wrapped around the pump pulley and wrapped around the crank pulley,
The one-stage transmission belt can drive each auxiliary machine to shorten the total length of the internal combustion engine, and since each auxiliary machine is arranged on one side of the cylinder block, the overall width of the internal combustion engine does not increase and The mountability of the engine is improved and a sufficient crash stroke can be secured.

[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 a layout configuration diagram when an air conditioner is installed in the same embodiment.

FIG. 3 is a schematic side view showing a state of being mounted on the vehicle of the same embodiment.

FIG. 4 is a layout explanatory diagram in the case where a power steering is further mounted in the same embodiment.

FIG. 5 is an arrangement configuration diagram of an auxiliary equipment arrangement structure of an internal combustion engine of a conventional example.

FIG. 6 is a layout configuration diagram when an air conditioner is mounted in the conventional example.

[Explanation of symbols]

 1 Internal Combustion Engine 1a Virtual Plane 2 Cylinder Block 5 Crank Shaft 6 Crank Pulley 7 Water Pump 8 Water Pump Pulley 9 Alternator 10 Alternator Pulley 11 Transmission Belt 12 Compressor 13 Compressor Pulley

Claims (1)

[Claims] 1. A water pump is disposed on one side of an imaginary plane passing through a crank axis and a cylinder axis at one end of the cylinder block, and one or a plurality of other pumps are disposed on one side of the cylinder block. Auxiliary equipment is installed, the lower end of the endless transmission belt wound around the crank pulley in the direction of rotation is sequentially wound around the pulleys of other auxiliary equipment, the back surface is wound around the water pump pulley, and the crank pulley is wound around. An auxiliary machine arrangement structure for an internal combustion engine, characterized in that