JPH07127477A - Structure for mounting accessory on engine for automobile - Google Patents

Abstract

PURPOSE:To provide a structure for mounting an accessory on an automobile engine wherein the accessory can be mounted on the engine with high rigidity, an influence by vibration of the engine is hardly exercised, and besides coping with variation of the specifications of an accessory mounted on the engine is practicable. CONSTITUTION:In mounting structure for an accessory 2 arranged in the vicinity of the engine of an automobile and installed by mounting on an engine 1, one mounting part 23 of the accessory 2 and the other mounting part 24 are individually fixed to the cylinder block 15 itself of the engine 1 and a mount bracket 9, respectively, for mounting the engine 1 on a car body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting an automobile accessory such as an alternator, which is arranged near an engine of an automobile and is rotated by interlocking with a crankshaft, to the engine.

[0002]

2. Description of the Related Art As a generator arranged near the engine of a vehicle, it is mainly used as an alternator (alternator) because it is lightweight, small in size, can withstand high speed rotation, and can generate sufficient power even at low speed such as idling. ) Is used, and this alternator is usually attached to the engine through brackets by attachment portions provided above and below the alternator.

Regarding the mounting of the alternator on the engine via the bracket, conventionally, in order to reduce the number of parts, the upper and lower mounting portions of the alternator are fixedly mounted on one bracket, or are mounted on the engine.
Although the number of parts increases, in order to reduce the size of each bracket itself, the upper and lower mounting parts of the alternator are separately fixed to each of a plurality of brackets that are separately mounted on the engine, or the number of parts is further reduced. The upper and lower mounting parts of the alternator are fixed to the engine mounting bracket itself.

[0004]

By the way, when the alternator is attached to the engine through the bracket as described above, the rigidity of the attachment to the engine cannot be increased in any case, and the state of attachment of the alternator to the engine cannot be improved. Is greatly affected by engine vibration.

If the alternator is fixed to the mount bracket itself for mounting the engine on the vehicle body, the effect of engine vibration can be mitigated, but the mounting rigidity to the engine cannot be increased and the number of parts is small. On the other hand, since the mounting bracket is integrated with the bracket for mounting the alternator to support all of the alternator, the mounting bracket itself has a large shape and its machining becomes difficult.

On the other hand, in order to increase the mounting rigidity of the alternator to the engine, it is considered that the upper and lower mounting portions of the alternator are directly mounted to the engine itself, which eliminates the need for a bracket for mounting the alternator. come.

However, forming the mounting portion directly on the engine itself makes the shape of the entire engine large and complicated and makes it difficult to process the engine, and the alternator mounted on one engine is different. The specifications of the alternator are often changed, and if the shape of the alternator mounting part of the engine is fixed, it will not be possible to cope with this change, so both the upper and lower mounting parts of the alternator are attached to the engine itself. It is practically impossible to directly attach it.

An object of the present invention is to eliminate the inconvenience of the conventional mounting structure of an alternator for an automobile engine as described above. More specifically, it can be mounted to the engine with high rigidity, It is an object of the present invention to provide an accessory mounting structure for an automobile engine that is not easily affected by engine vibration and that is capable of responding to changes in mounting parts for the engine.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, the present invention provides a mounting structure for an accessory which is installed near an engine of an automobile and installed by being mounted on the engine. The one attachment part of the accessory is separately fixed to the cylinder block of the engine, and the other attachment part is separately fixed to a mount bracket for attaching the engine to the vehicle body.

[0010]

[Operation] According to the above configuration, one of the attachment parts of the accessory is fixed to the cylinder block of the engine, so that the attachment rigidity of the accessory to the engine is sufficiently high in this part, and Since the mounting portion is fixed to the mounting bracket that is fixed to both the engine and the vehicle body, the mounting state of the accessories in this portion is not significantly affected by the vibration of the engine.

Further, even if the specification of the accessory is changed and the positional relationship of the respective attachment portions is slightly changed, this can be dealt with by replacing the mount bracket accordingly.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An accessory mounting structure of the present invention will be described below with reference to the drawings by an embodiment of mounting an alternator on a multi-cylinder four-cycle engine of an automobile.

FIG. 1 shows the arrangement of accessories for the multi-cylinder engine when viewed from the direction of the cylinder row. In the vicinity of the engine 1, an alternator 2, a power steering pump 3, and an air conditioner compressor are provided. Accessories such as 4 are arranged, and the respective rotary shafts 21, 31, 41 for operating these accessories and the crankshaft 11 of the engine are the rotary shafts of the water pump 5 attached to the engine 1. Along with 51, it is configured so as to be interlocked by one belt 7 that is wound around each pulley 12, 22, 32, 42, 52 provided on each, and oil having a filter portion below the engine 1 A cooler 8 is attached.

FIG. 2 shows the engine 1 in FIG. 1, in which a cylinder head 14 having a head cover 13 on its top and a cylinder block 15 whose side surface is covered by a chain cover 16 (in this embodiment, this portion is (Comprising a cylinder block body and a crankcase), and an oil pan 17 installed below the cylinder block 15.
The water pump 5 is attached to the surface of the chain cover 16.

FIG. 3 shows the engine 1 shown in FIG. 2 with the chain cover 16 removed.
On the side surface of the cylinder block 15, an inlet port 18 for introducing cooling water to the water pump 5 and an opening portion 19 for introducing cooling water to the water jacket of the cylinder block are opened above the side surface of the cylinder block 15. Oil passage 83 for introducing oil into the oil cooler 8
A sprocket 60 fixed to the crankshaft 11 and chains 61 and 62 meshing with respective chain engaging teeth provided in parallel with the sprocket 60 are arranged.

The chain 61 is an intake camshaft 64 of a five-valve twin cam (not shown) having three intake valves and two exhaust valves per cylinder arranged in the upper part of the engine.
And a lower chain of a two-stage timing chain for transmitting the rotation of the crankshaft 11 to the exhaust camshaft 65 and rotating each camshaft 64, 65 by the upper chain 68 via the intermediate rotation shaft 67. The chain 62 is a rotary shaft 6 of an oil pump (not shown) installed in an oil pan 17 under the engine.
3 for transmitting the rotation of the crankshaft 11.

Each cam shaft 64, 6 of this twin cam valve
For the two-stage timing chain for rotating 5, the tensioner 71 is installed in the cylinder head 14 in the upper chain 68, and the tensioner 72 is installed in the cylinder block 15 in the lower chain 61 so that they can be maintained from the outside. Has been done.

The intake cam shaft 64, the exhaust cam shaft 65 and the intermediate rotary shaft 67 are arranged with respect to the center line passing through the crank shaft 11 in order to secure a space for installing the tensioner 71 in the cylinder head 14. The tensioner 71 is slightly displaced from the normal direction in the opposite direction.

By the way, the mating surfaces 15a and 15b of the side surface of the cylinder block 15 with the chain cover are formed so as to have a step in the horizontal direction of the cross section thereof as shown in FIG. 15
A support portion 15c for supporting the lower mounting portion 23 of the alternator 2 is formed on the side of the protruding mating surface 15a integrally protruding from the cylinder block 15.
The support portion 15c is formed with a fixing portion 15d for fixing the lower mounting portion 23 of the alternator 2 with a bolt.

Below the alternator support portion 15c, a push rod 72b for pressing the tension arm 72a of the tensioner 72 is installed on the cylinder block 15 from the outside, as shown in FIGS. 3 and 4. For this purpose, a mounting hole 15e for fixing the cylinder 72C of the push rod is formed through the cylinder block 15.

On the other hand, as shown in FIG. 2, when the side surface of the cylinder block 15 is covered with the chain cover 16, the mating surface 15b of the cylinder block 15 is formed.
On the outer surface of the chain cover 16 near the cover member, a turbine housing 53, a cooling water passage 54 to the water jacket opening 19, and a cooling water passage 55 to the oil cooler 8 are integrated. The water pump 5 is attached by fixing 50 with bolts.

As shown in FIG. 5, the water pump 5 has a housing portion of which the chain cover 1 is provided.
6 is integrally formed with the turbine housing 6, and the housing portion is covered with a cover member 50 to form a turbine housing 53 and cooling water passages 54 and 55 following the turbine housing 53. 5
7 will be installed, and the rotating shaft 51 of the turbine 57 will be installed.
Is extended to the outside of the cover member 50, and a pulley 52 for interlocking with the rotation of the crank shaft 11 of the engine 1 is attached to the tip of the cover member 50 to circulate the cooling water as shown in FIG. It is what makes me.

The cooling water passage 5 of the water pump 5
As for the inflow passage of the cooling water from the oil cooler 5 to the oil cooler 8, as shown in FIG. 6, from the end of the cooling water passage 55 formed by the chain cover 16 and the cover member 50 to the chain cover 16. Passed through passage 55b
The cooling water is introduced into the oil cooler 8 from the cooling water introduction part 81 of the oil cooler 8 via the.

The cooling water passage 55 to the oil cooler 8 of the water pump 5 is not limited to the one formed by the chain cover 16 and the cover member 50 as in the above embodiment, but is shown in, for example, FIG. As shown in FIG. 9, the cooling water passage 55 to the oil cooler 8 is integrally formed on the back side of the chain cover 16, or as shown in FIG.
By forming 5 through the cylinder block 15 itself, it is possible to integrally form the components of the engine without using a member such as a hose.

In any case, the mating surfaces 15a and 15b on the side surface of the cylinder block 15 with the chain cover are formed so as to have a step in the horizontal direction of the cross section, and the chain cover 16 portion on the mating surface 15b side is formed. Since the water pump 5 is formed, the water pump 5 does not project much from the side surface of the cylinder block 15 as compared with the case where the mating surface of the cylinder block side surface and the chain cover are formed flush with each other. Can be installed.

For the engine 1 as described above,
Mount bracket 9 for fixing this to the vehicle body,
The mounting bracket 9 is mounted so as to straddle both the cylinder head 14 and the cylinder block 15, and the mounting bracket 9 is mounted on the mounting bracket 9 as shown in FIG.
And each part 10a, 10b, 10c, 10 of the engine 1.
a fixing portion 90 for fixing each to d with a bolt
a, 90b, 90c, 90d are provided,
A fixing portion 92 for fixing the mounting portion 24 above the alternator 2 with a bolt is provided.

As shown in FIG. 1, the alternator 2 has its upper mounting portion 24 fixed to the fixing portion 92 of the mount bracket 9 with bolts, and its lower mounting portion 23 in the cylinder block. 15d of the alternator support portion 15c formed integrally with the fixing portion 15d
By being fixed to the engine 1 with bolts, the engine 1 is mounted above and below the engine 1.

According to the above embodiment, the alternator 2 has a high mounting rigidity to the engine because the lower mounting portion 23 is fixed to the cylinder block 15 itself of the engine 1, and the upper mounting portion thereof. Since 24 is fixed to the vehicle body by the mount bracket 9, the influence of the engine vibration at that portion on the mounting state is small, and when the specifications of the alternator 2 are changed, the mounting is performed. This can be dealt with by replacing the bracket 9 accordingly.

Although the structure for mounting the accessory to the automobile engine of the present invention has been described above with reference to the embodiment of the alternator, the present invention is applicable to the accessory other than the alternator as described above. Needless to say.

[0030]

According to the accessory mounting structure for an automobile engine of the present invention as described above, the accessory can be mounted on the engine with high rigidity, and is hardly affected by the vibration of the engine. Moreover, it is possible to deal with changes in the specifications of accessories for the engine.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a side view showing an engine portion without accessories of the embodiment shown in FIG.

3 is a side view showing a state where a chain cover of the engine shown in FIG. 2 is removed.

FIG. 4 is a partial cross-sectional view taken along the line AA in FIG.

5 is a partial cross-sectional view taken along the line BB in FIG.

6 is a partial cross-sectional view taken along the line CC of FIG.

7 is an explanatory diagram showing a circulating state of cooling water by the water pump shown in FIG.

FIG. 8 is a side view of an engine portion showing another embodiment of the water pump.

FIG. 9 is a side view of an engine portion showing still another embodiment of the water pump.

FIG. 10 is an exploded side view showing a part of the mounting bracket of the embodiment shown in FIG. 1 and an engine for mounting the mounting bracket.

[Explanation of symbols]

 1 Engine 2 Accessories (alternator) 9 Mount bracket 15 Cylinder block 23 Lower mounting part of accessory (alternator) 24 Upper mounting part of accessory (alternator)

Claims (1)

[Claims] 1. A mounting structure for an accessory, which is arranged by being installed in the vicinity of an engine of an automobile and mounted on the engine, wherein one mounting portion of the accessory is the cylinder block of the engine and the other mounting portion is the engine. An attachment mounting structure for an automobile engine, characterized in that each of them is separately fixed to a mount bracket for attaching to the vehicle body.