JP3931101B2 - Manufacturing method of different cylinder engine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a different cylinder engine, and more particularly, to a method that simplifies machining of a balancer bearing hole.
[0002]
[Prior art]
Conventionally, the relative arrangement of balancer bearing holes has not been associated with each other among a plurality of types of engines having different numbers of cylinders, and these are usually greatly different. For this reason, when the hole finish processing of the balancer bearing holes of multiple types of engines is performed on the same processing table, or when the drilling processing is performed on the same processing table, the cylinder blocks of various engines have the same posture. Even if this is aligned, the machining position of the balancer bearing hole changes greatly every time the type of engine changes. For this reason, every time the type of engine changes, the setting position of the processing tool on the processing table is largely adjusted again. Also, the balancer shaft assembly position changes greatly each time the type of engine changes, so the balancer shaft assembly position is checked each time in the balancer shaft assembly process.
[0003]
[Problems to be solved by the invention]
The above prior art has the following problems.
<Problem 1> The processing of the balancer bearing hole is complicated.
When the hole finish processing of balancer bearing holes of multiple types of engines is performed on the same processing table, or when drilling is performed on the same processing table, each time the engine type changes, the processing tool on the processing table It is necessary to re-adjust the setting position of. For this reason, the processing of the balancer bearing hole is complicated.
[0004]
<< Problem 2 >> The work of assembling the balancer shaft is complicated.
Each time the type of engine changes, the assembly position of the balancer shaft changes greatly. Therefore, in the assembly process of the balancer shaft, it is necessary to check the assembly position of the balancer shaft each time, and the assembly work of the balancer shaft is complicated.
[0005]
The subject of this invention is providing the manufacturing method of a different cylinder engine which can solve the said problem.
[0006]
[Means for Solving the Problems]
The configuration of the main invention of claim 1 is as follows (see FIG. 1).
In a method for manufacturing a different cylinder engine for manufacturing a plurality of types of engines (1a) and (1b) having different numbers of cylinders,
When manufacturing a plurality of types of engines (1a) (1b) having balancer shaft bearing holes (2a) (2b), a pair of balancer shafts distributed on both sides in the width direction of the various engines (1a) (1b) to be manufactured. Relating the relative arrangement of the bearing holes (2a) and (2b) to each other,
Assuming the specific observation state, that is, the cross-sections orthogonal to the crankshaft of the various engines (1a) and (1b), the postures of the cross-sections are the same, the crankshaft axis lines (3a) and (3b) are matched, In the observation state seen together,
At least a part of one side balancer bearing holes (2a) and (2b) of various engines (1a) and (1b) overlap each other, and at least a part of other side balancer bearing holes (2a) and (2b) overlap. A pair of balancer bearing holes (2a) (2b)
Various engines (1a) (1b) are provided with different holes (5a) (5b) oriented in parallel with the pair of balancer bearing holes (2a) (2b),
In the specific engine (1a), the primary balancer shaft (5) is supported by the separate hole (5a). In the separate engine (1b), the separate hole (5b) can be attached to the balancer shaft. When nothing is attached to the separate hole (5b), the compartment space (10) (10) for each cylinder of the crank chamber partitioned by the bearing wall (7) can be communicated with each other. In (1b), the balancer shaft is mounted by being attached to the separate hole (5b), or nothing is attached to the separate hole (5b), and the partition space (10) ( 10) Let them communicate with each other,
In manufacturing these types of engines (1a) and (1b), the relative arrangements of the separate holes (5a) and (5b) of the various engines (1a) and (1b) to be manufactured are related to each other.
In the specific observation state, the separate holes (5a) and (5b) are formed so that at least a part of the separate holes (5a) and (5b) of the various engines (1a) and (1b) overlap each other .
The valve camshaft bearing holes ( 8a ) ( 8b ) are arranged so that the valve camshafts ( 16a ) ( 16b ) received by the camshaft bearing holes are on the lateral side of the lower part of the cylinder ( 18 ) , and the pair of balancers among the shaft bearing hole (2a) (2b), the higher the balancer shaft bearing hole of (2a) (2b), this in bearing the secondary rotary balancer shaft (6a) (6b) is, the valve operating cam shaft (16a ) ( 16b ) above the upper side of the cylinder ( 18 ) , the lower balancer shaft bearing hole ( 2a ) ( 2b ) has a secondary rotating balancer shaft ( 6a ) ( 6b ) is arranged on the opposite side to the valve operating camshaft ( 16a ) ( 16b ) and obliquely below the bottom of the cylinder ( 18 ) , and this lower balancer shaft bearing hole ( 2a) the center axis of the (central axis of 2b) (4a) (4b) is the valve operating cam shaft bearing hole (8a) (8b) ( a) (it was made to be lower than 9b), a manufacturing method of a different cylinder engine, characterized in that.
[0007]
【The invention's effect】
(Invention of Claim 1)
The invention of claim 1 has the following effects.
<Effect> Processing of the balancer bearing hole is simplified.
When the hole surface finishing of the pair of balancer bearing holes (2a) (2b) of various engines (1a) (1b) is performed on the same processing table, or when drilling is performed on the same processing table, various engines (1a) If the cylinder blocks (20a) and (20b) of (1b) are kept in the same position so that the crankshaft axes (3a) and (3b) are at the same position or substantially the same position, the type of engine is Even if it changes, the machining positions of the pair of balancer bearings (2a) and (2b) are the same or substantially the same. For this reason, it is not necessary to largely adjust the setting position of the processing tool on the processing table, and the processing of the pair of balancer bearings (2a) and (2b) is simplified.
[0008]
<Effect> Assembly work of a pair of balancer shafts is simplified.
Even if the type of the engine (1a) (1b) is changed, the assembly position of the pair of balancer shafts (6a) (6b) is the same or substantially the same. Therefore, in the assembly process of the balancer shafts (6a) (6b) In each case, it is not necessary to confirm the assembly position of the pair of balancer shafts (6a) and (6b), and the assembly work of the pair of balancer shafts (6a) and (6b) is simplified.
<Effect> Processing of another hole becomes easy.
When the hole surface finishing of the different holes (5a) and (5b) of the various engines (1a) and (1b) is performed on the same processing table, or when drilling is performed on the same processing table, the various engines (1a) ( If the cylinder blocks (20a) and (20b) of 1b) are kept in the same position so that the crankshaft axes (3a) and (3b) are at the same position or substantially the same position, even if the engine type changes, The processing positions of the different holes (5a) and (5b) are the same or substantially the same. For this reason, it is not necessary to largely adjust the setting position of the processing tool on the processing table, and the processing of the separate holes (5a) and (5b) is simplified.
<Effect> Processing of the valve cam shaft bearing hole is simplified.
Various engine ( 1a ) ( 1b ) valve cam shaft bearing hole ( 8a ) ( 8b ) hole surface finishing when the same processing table, or when drilling processing is performed on the same processing table, various engines If the cylinder blocks ( 20a ) ( 20b ) of ( 1a ) ( 1b ) are kept in the same posture so that the crankshaft axes ( 3a ) ( 3b ) are at the same position or substantially the same position, the type of engine becomes Even if it changes, the machining positions of the valve drive cam bearing holes ( 8a ) and ( 8b ) are the same or substantially the same. For this reason, it is not necessary to largely adjust the setting position of the processing tool on the processing table, and the processing of the valve camshaft bearing holes ( 8a ) and ( 8b ) is simplified.
<Effect> Assembly of the valve camshaft is simplified.
Even if the type of the engine ( 1a ) ( 1b ) is changed, the assembly position of the valve camshafts ( 16a ) ( 16b ) is the same or substantially the same, so the valve camshafts ( 16a ) ( 16b ) are assembled. in step, each time, the valve operating cam shaft (16a) (16b) there is no need to check the mounting position of the work of assembling the valve operating cam shaft (16a) (16b) is simplified.
[0009]
(Invention of Claim 2)
In addition to the effect of the invention of claim 1, the invention of claim 2 has the following effect.
<Effect> Adjustment of the setting position of the processing tool can be made common to various engines.
When the hole surface finishing of the pair of balancer bearing holes (2a) (2b) of various engines (1a) (1b) is performed on the same processing table, or when drilling is performed on the same processing table, various engines (1a) If the cylinder blocks (20a) and (20b) of (1b) are kept in the same position so that the crankshaft axes (3a) and (3b) are at the same position, it will be processed even if the engine type changes. The center axis lines (4a) and (4b) of the pair of balancer shaft bearing holes (2a) and (2b) are substantially at the same position. For this reason, adjustment of the setting position of the processing tool on the processing table can be shared by the various engines (1a) and (1b).
[0010]
[0011]
[0012]
[0013]
[0014]
(Invention of Claim 3 )
The invention of claim 3 has the following effect in addition to the effect of the invention of either claim 1 or claim 2 (see FIG. 1A).
<Effect> A primary balancer can be effectively used for a three-cylinder engine in which primary vibration is likely to occur.
Since the specific type engine (1a) in which the primary balancer shaft (6) is mounted in the separate hole (5a) is a three-cylinder engine, the primary balancer shaft (5) is effectively used for a three-cylinder engine in which primary vibration is likely to occur. Can be used.
[0015]
(Invention of Claim 4 )
The invention of claim 4 has the following effect in addition to the effect of any one of claims 1 to 3 (see FIG. 1B).
<Effect> In a 4-cylinder engine, the advantage of suppressing the undulation of the lubricating oil surface is obtained. Nothing is attached to the separate hole (5b), and each cylinder in the crank chamber partitioned by the bearing wall (7) When the other type engine (1b) that communicates the compartment spaces (10) and (10) through another hole (5b) is a four-cylinder engine, vibration reduction is reduced in a four-cylinder engine that is essentially less likely to generate primary vibration. There is no obstacle to the above, and there is obtained an advantage that the differential pressure between the compartment spaces (10) and (10) can be reduced, and the ripple of the lubricating oil surface can be suppressed.
[0016]
[0017]
[0018]
(Invention of Claim 5 )
The invention of claim 5 has the following effects in addition to the effects of any one of claims 1 to 4 .
<Effect> Adjustment of the setting position of the processing tool can be made common to various engines.
Various engine (1a) (1b) valve cam shaft bearing hole (8a) (8b) when the hole surface finishing is performed on the same processing table, or when drilling is performed on the same processing table, various engines (1a) If the cylinder blocks (20a) and (20b) of (1b) are kept in the same position so that the crankshaft axes (3a) and (3b) are at the same position, it will be processed even if the engine type changes. The central axis lines (4a) and (4b) of the valve cam shaft bearing holes (8a) and (8b) are substantially in the same position. For this reason, adjustment of the setting position of the processing tool on the processing table can be shared by the various engines (1a) and (1b).
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 and 2 are diagrams for explaining a method of manufacturing a different cylinder engine according to an embodiment of the present invention. 1A shows a vertical in-line three-cylinder diesel engine, and FIG. 1B shows a vertical in-line four-cylinder diesel engine. In this embodiment, a method for manufacturing the 3-cylinder and 4-cylinder diesel engines will be described.
[0020]
The outline of the manufacturing method is as follows.
In this method, as shown in FIGS. 1A and 1B, when manufacturing a three-cylinder engine (1a) and a four-cylinder engine (1b), balancer bearing holes ( 2a) (2b), separate holes (5a) (5b), and valve camshaft bearing holes (8a) (8b) are associated with each other in relation to each other, and the balancer shaft of each engine (1a) (1b). When the hole finishing of the bearing holes (2a) and (2b), the separate holes (5a) and (5b), and the valve drive cam bearing holes (8a) and (8b) are performed on the same processing table, or the drilling process is the same When using the processing table, it is not necessary to re-adjust the setting position of the processing tool on the processing table.
[0021]
The common features of both engines are as follows.
This will be described with reference to a four-cylinder engine (1b) shown in FIGS. As shown in FIG. 2, a belt transmission (11) is arranged at the front of the cylinder block (20b), and a water pump (13) and a cooling fan (cooling fan (13) are connected to the crankshaft (12) via the belt transmission (11). 14). As shown in FIG. 3, a gear train timing transmission (15) is arranged at the rear of the cylinder block (20b), and the fuel injection pump (17) is connected to the crankshaft (12) via the timing transmission (15). ). Moreover, as shown in FIG. 2, a pair of secondary rotation balancer shafts (6b) and (6b) are interlocked via a timing transmission device (15).
[0022]
Other common points are as follows.
This will be described with reference to both engines (1a) and (1b) shown in FIGS. Both engines (1a) and (1b) are provided with a pair of balancer shaft bearing holes (2a) and (2b) on the left and right sides in the engine width direction. When the engine is viewed from the front, the secondary balancer bearing holes (2a) (2b) on the left side are located at the height of the lower end of the cylinder (18), and the secondary balancer bearing holes (2a) on the right side (2b) is located at the height of the upper part of the cylinder (18). The pair of balancer shaft bearing holes (2a) and (2b) are provided with a height difference, and the secondary balancer shafts (6a) and (6b) are supported by the pair of balancer shaft bearing holes (2a) and (2b). Both engines (1a) and (1b) are provided with valve-operated cam shaft bearing holes (8a) and (8b) and separate holes (5a and 5b) on the left side of the engine. The valve camshaft bearing holes (8a) and (8b) are positioned at the lower side of the cylinder (18) on the left side of the engine, and the other holes (5a) and (5b) are valve camshaft bearing holes (8a). ) (8b) is located diagonally below.
[0023]
The structural differences between the two engines are as follows.
Although the number of cylinders (18) in each cylinder block is different, the different hole (5a) in the case of three cylinders shown in FIGS. 1 (A) and (B) is different in the case of four cylinders ( The diameter is larger than 5b), thereby bearing the primary balancer (5). A separate hole (5b) in the case of four cylinders can be fitted with a balancer shaft, and when nothing is attached to this separate hole (5b), each cylinder of the crank chamber partitioned by the bearing wall (7) Each compartment space (10), (10) is structured to communicate with each other, and is used as a bearing for another secondary balancer (not shown), or nothing is attached to the other hole (5b). When nothing is attached, the compartment spaces (10) and (10) for each cylinder of the crank chamber partitioned by the bearing hole (7) are communicated with each other through another hole (5b). The figure of FIG. 1 (B) is a figure which has nothing attached to another hole (5b).
[0024]
The manufacturing procedure for both engines is as follows.
The cylinder blocks (20a) and (20b) of both engines (1a) and (1b) are individually casted. As shown in FIGS. 2 and 3, the accommodating space for the secondary rotation balancer shafts (6a) and (6b), the accommodating spaces for the valve operating cam shafts (16a) and (16b), and the partition space for each cylinder in the crank chamber ( 10) (10) is a sand core and is formed at the time of casting. The balancer shaft bearing holes (2a) and (2b), the valve operating cam shaft bearing holes (8a) and (8b), and the other holes (5a and 5b) are also formed with a sand core during casting. These holes may be formed in the wall of the cylinder block (20) by drilling after casting the cylinder block. Hole surface finishing is performed on these holes. The hole finishing of each hole is performed on the same processing table regardless of the type of engine. In this case, the postures of the cylinder blocks 20a and 20b of the engines 1a and 1b are made the same so that the crankshaft axes 3a and 3b are at the same position or substantially the same position. .
[0025]
The device by this embodiment is as follows.
In manufacturing both engines (1a) and (1b), the relative arrangement of the balancer shaft bearing holes (2a) and (2b) of both engines (1a) and (1b), valve cam bearing holes (8a) and (8b)
The relative arrangement of each other and the relative positions of the different holes (5a) and (5b) are associated with each other. Assuming the specific observation state, that is, the crankshaft orthogonal cross sections of both engines (1a) and (1b), the postures of the cross sections are the same, the crankshaft axis lines (3a) and (3b) are matched, and the cross sections are overlapped The following association is performed in the observation state seen together.
[0026]
The center axis lines (4a) and (4b) of the pair of balancer shaft bearing holes (2a) and (2b) of both engines (1a) and (1b) substantially coincide with each other, and the pair of balancer shaft bearing holes (2a) and (2b). A pair of balancer shaft bearing holes (2a) and (2b) are formed so that all of these are overlapped with each other. The pair of balancer shaft bearing holes (2a) (2b) may partially overlap each other. Further, the central axes (9a) and (9b) of the valve camshaft bearing holes (8a) and (8b) of the various engines (1a) and (1b) substantially coincide with each other, and each valve camshaft bearing hole (8a). Each valve cam shaft bearing hole (8a) (8b) is formed so that all of (8b) overlap. Each valve cam shaft bearing hole (8a) (8b) may be partially overlapped. Separate holes (5a) and (5b) are formed so that parts of the separate holes (5a) and (5b) of the engines (1a) and (1b) overlap each other. These separate holes (5a) and (5b) may all be overlapped with each other.
Further, as shown in FIG. 1 (A) (B), Kakudoben camshaft bearing hole (8a) (8b), this in bearing the valve camshafts of (16a) (16b) is a cylinder (18) Of the pair of balancer bearing holes ( 2a ), ( 2b ) , the higher balancer bearing holes ( 2a ), ( 2b ) of the pair of balancer bearing holes ( 2a ), ( 2b ) are the secondary rotation balancers that are supported by this. The shafts ( 6a ) ( 6b ) are arranged so as to be on the lateral side of the upper part of the cylinder ( 18 ) above the valve camshafts ( 16a ) ( 16b ) , and the lower balancer shaft bearing hole ( 2a ) ( 2b ) , the secondary rotation balancer shaft ( 6a ) ( 6b ) received by this is opposite to the valve operating cam shaft ( 16a ) ( 16b ) in the engine width direction , and obliquely below the lower portion of the cylinder ( 18 ). come as arranged, the central axis (4a) (4b) is the valve operating cam of the lower balancer shaft bearing hole of (2a) (2b) Is set to be lower than the central axis of the bearing hole (8a) (8b) (9a ) (9b).
[0027]
The meaning of the terms is as follows.
“The center axes (4a) and (4b) of the pair of balancer shaft bearing holes (2a) and (2b) substantially coincide with each other” includes the case where the center axes (4a) and (4b) completely coincide with each other. Of course, even if the central axes (4a) and (4b) are not completely coincident with each other, it is recognized that the deviation is within the range of normal production errors. It is meant to include those that are presumed to have been done. “The central axes (9a) and (9b) of the valve cam shaft bearing holes (8a) and (8b) substantially coincide with each other” has the same meaning.
[Brief description of the drawings]
1A and 1B are diagrams for explaining a method of manufacturing a different cylinder engine according to an embodiment of the present invention. FIG. 1A is a cross-sectional view orthogonal to a crankshaft of a three-cylinder engine, and FIG. It is an axis orthogonal sectional view.
FIG. 2 is a development view of a cross section of the engine of FIG. 1B cut along a pair of balancer shafts and a valve camshaft.
FIG. 3 is a developed view of a cross section of the engine of FIG. 1B cut along a valve camshaft and another hole.
4 is a longitudinal sectional side view of the engine of FIG. 1 (B). FIG.
[Explanation of symbols]
(1a) 3 cylinder engine, (1b) 4 cylinder engine, (2a) (2b) Balancer shaft bearing hole, (3a) (3b) Crank shaft axis, (4a) (4b) Balancer shaft bearing hole (5a) (5b) ... Separate hole, (6a) (6b) ... Secondary rotation balancer shaft, (7) ... Bearing wall, (8a) (8b) ... Valve cam shaft bearing hole, (9a ) (9b)... Central axis of valve camshaft bearing hole, (10).

Claims (5)

In a method for manufacturing a different cylinder engine for manufacturing a plurality of types of engines (1a) (1b) having different numbers of cylinders
When manufacturing a plurality of types of engines (1a) (1b) having balancer shaft bearing holes (2a) (2b), a pair of balancer shafts distributed on both sides in the width direction of the various engines (1a) (1b) to be manufactured. Relating the relative arrangement of the bearing holes (2a) and (2b) to each other,
Assuming the specific observation state, that is, the cross-sections orthogonal to the crankshaft of the various engines (1a) and (1b), the postures of the cross-sections are the same, the crankshaft axis lines (3a) and (3b) are matched, In the observation state seen together,
At least a part of one side balancer bearing holes (2a) and (2b) of various engines (1a) and (1b) overlap each other, and at least a part of other side balancer bearing holes (2a) and (2b) overlap. A pair of balancer bearing holes (2a) (2b)
Various engines (1a) (1b) are provided with separate holes (5a) (5b) oriented in parallel with the pair of balancer bearing holes (2a) (2b),
In the specific engine (1a), the primary balancer shaft (5) is supported by the separate hole (5a). In the separate engine (1b), the separate hole (5b) can be attached with a balancer shaft. When nothing is attached to the separate hole (5b), the partition space (10) (10) for each cylinder of the crank chamber partitioned by the bearing wall (7) can communicate with each other. In the engine (1b), the balancer shaft is supported by being attached to the separate hole (5b), or nothing is attached to the separate hole (5b), and the partition space (10) is connected via the separate hole (5b). (10) Let them communicate with each other,
In manufacturing these types of engines (1a) and (1b), the relative arrangements of the separate holes (5a) and (5b) of the various engines (1a) and (1b) to be manufactured are related to each other.
In the specific observation state, the separate holes (5a) and (5b) are formed so that at least a part of the separate holes (5a) and (5b) of the various engines (1a) and (1b) overlap each other .
A height difference is provided in the pair of balancer shaft bearing holes (2a) and (2b),
The pair of balancer shaft bearing holes (2a) and (2b) receive the secondary rotation balancer shafts (6a) and (6b) ,
In manufacturing a plurality of types of engines (1a) and (1b), the relative positions of the valve camshaft bearing holes (8a) and (8b) of the various engines (1a) and (1b) to be manufactured are related to each other.
In the specific observation state, the valve drive cam bearing holes (8a) (8b) are formed so that at least a part of the valve drive cam bearing holes (8a) (8b) of the various engines (1a) (1b) overlap. Forming ,
The valve camshaft bearing holes ( 8a ) ( 8b ) are arranged so that the valve camshafts ( 16a ) ( 16b ) received by the camshaft bearing holes are on the lateral side of the lower part of the cylinder ( 18 ) , and the pair of balancers among the shaft bearing hole (2a) (2b), the higher the balancer shaft bearing hole of (2a) (2b), this in bearing the secondary rotary balancer shaft (6a) (6b) is, the valve operating cam shaft (16a ) ( 16b ) above the upper side of the cylinder ( 18 ) , the lower balancer shaft bearing hole ( 2a ) ( 2b ) has a secondary rotating balancer shaft ( 6a ) ( 6b ) is arranged on the opposite side to the valve operating camshaft ( 16a ) ( 16b ) and obliquely below the bottom of the cylinder ( 18 ) , and this lower balancer shaft bearing hole ( 2a) the center axis of the (central axis of 2b) (4a) (4b) is the valve operating cam shaft bearing hole (8a) (8b) ( a) (it was made to be lower than 9b), a manufacturing method of a different cylinder engine, characterized in that. In the manufacturing method of the different cylinder engine according to claim 1,
In the specific observation state, the center axis lines (4a) and (4b) of the balancer shaft bearing holes (2a) and (2b) on one side of the various engines (1a) and (1b) substantially coincide with each other. A pair of balancer bearing holes (2a) (2b) are formed so that the central axes (4a) (4b) of the balancer bearing holes (2a) (2b) substantially coincide with each other. Manufacturing method of different cylinder engine. In the manufacturing method of the different cylinder engine in any one of Claim 1 or Claim 2 ,
The method of manufacturing a different cylinder engine, wherein the specific type engine (1a) is a three-cylinder engine. In the manufacturing method of the different cylinder engine according to any one of claims 1 to 3 ,
The different-type engine (1b) is a four-cylinder engine. In the manufacturing method of the different cylinder engine according to any one of claims 1 to 4 ,
In the specific observation state, the valve camshafts are such that the central axes (9a) (9b) of the valve camshaft bearing holes (8a) (8b) of the various engines (1a) (1b) substantially coincide with each other. A method of manufacturing a different cylinder engine, wherein the bearing holes (8a) and (8b) are formed.

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