JP4048144B2 - Multi-cylinder engine manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a multi-cylinder engine .
[0002]
[Prior art]
Conventionally, an engine fuel injection camshaft has a cam projection, and a cam surface for fuel injection is provided only at one end of the cam projection in the forward rotation direction so that fuel can be injected only when rotated in the forward rotation direction. It has become.
[0003]
[Problems to be solved by the invention]
The above prior art has the following problems.
<Problem> It is necessary to manufacture a dedicated fuel injection camshaft for each rotation specification.
When differently creating a forward engine that rotates the fuel injection camshaft and a reverse engine that rotates the fuel injection camshaft, the fuel injection camshaft cannot be used as a common part. It is necessary to manufacture a dedicated fuel injection camshaft.
[0004]
The subject of this invention is providing the manufacturing method of the multicylinder engine which can solve the said problem.
[0005]
[Means for Solving the Problems]
(Invention of Claim 1)
Invention specific matters of the invention of claim 1 are as follows.
As illustrated in FIG. 2, by interposing a single gear (29) between the crank gear (31) and the fuel injection cam gear (33), the rotational direction of the fuel injection cam shaft (15) (b) A multi-cylinder engine with the same direction as the crankshaft ( 34 ) as a multi-cylinder engine with the same direction rotation,
As illustrated in FIG. 4, the rotation direction of the by interposing a pair of gears (29) (30) between the crank gear (31) and the fuel injection cam gear (33), the fuel injection cam shaft (15) ( a ) A multi-cylinder engine having a direction different from the crankshaft ( 34 ) is a multi-cylinder engine having a different direction rotation,
In manufacturing the above-mentioned specifications in which the rotation direction of the crankshaft ( 34 ) is the same, using the fuel injection camshaft ( 15 ) and the row type fuel injection pump ( 16 ) as common parts ,
As illustrated in FIG. 1, the fuel injection cam shaft (15), the cam projections (11) (12) (13) cam surfaces for each fuel injection in the rotational direction end portions of the (14) (11a) (11b) the (12a) (12b) (13a ) (13b) (14a) (14b) is provided,
As shown in FIGS. 6 to 10, in each of the above specifications, the combination of the connection between the fuel discharge port of the fuel injection pump ( 16 ) by the fuel injection pipe and the fuel injection nozzle of each cylinder is made different. The method for manufacturing a multi-cylinder engine is characterized in that the order of injection to each cylinder in the engine is made to coincide.
[0006]
[0007]
[0008]
(Invention of Claim 2 )
Invention specific matters of the invention of claim 2 are as follows.
The method of manufacturing a multi-cylinder engine according to claim 1 ,
As illustrated in FIG. 6, in the in-line four-cylinder engine of each specification , the fuel injection order to each cylinder is matched in the order of the first cylinder, the third cylinder, the fourth cylinder, and the second cylinder.
When making those corotating specification, while in the connected state of the fuel injection pipe in the counter-rotating specifications (21) (22) (23) (24), the rotational direction of the fuel injection cam shaft (15) ( b ) By changing the connection of the fuel injection pipes (22), (23) of the second cylinder and the third cylinder , the fuel injection order becomes the first cylinder, the second cylinder, the fourth cylinder, and the third cylinder. A method for manufacturing a multi-cylinder engine, characterized in that the fuel injection order is made to coincide with that of a different direction rotation specification .
[0009]
(Invention of Claim 3 )
Invention specific matters of the invention of claim 3 are as follows.
The method of manufacturing a multi-cylinder engine according to claim 1 ,
As illustrated in FIG. 7, in the in-line four-cylinder engine of each specification , the fuel injection order to each cylinder is matched in the order of the first cylinder, the second cylinder, the fourth cylinder, and the third cylinder.
When manufacturing the same direction rotation specification, the rotation ( b ) of the fuel injection camshaft (15) remains in the connected state of the fuel injection pipes (21) (22) (23) (24) in the different direction rotation specification. ) , The connection of the fuel injection pipes (22) and (23) of the second cylinder and the third cylinder is changed for those in which the fuel injection order is the first cylinder, the third cylinder, the fourth cylinder, and the second cylinder. The method for manufacturing a multi-cylinder engine is characterized in that the fuel injection sequence is matched with that of the different direction rotation specification .
[0010]
(Invention of Claim 4 )
Invention specific matters of the invention of claim 4 are as follows.
The method of manufacturing a multi-cylinder engine according to claim 1 ,
As illustrated in FIG. 8, in the inline three-cylinder engine of each specification, in order to match the fuel injection order to each cylinder in the order of the first cylinder, the third cylinder, and the second cylinder,
When manufacturing the same direction rotation specification , the fuel injection camshaft (15) is rotated ( b ) with the fuel injection pipes (21), (22) and (23) connected in the different direction rotation specifications . fuel injection sequence, the first cylinder, second cylinder, what the third cylinder, by changing the connection of the fuel injection pipe of the second cylinder and the third cylinder (22) (23), the fuel injection order of different A method for manufacturing a multi-cylinder engine, characterized by matching with that of a direction rotation specification .
[0011]
(Invention of Claim 5 )
Invention specific matters of the invention of claim 5 are as follows.
The method of manufacturing a multi-cylinder engine according to claim 1 ,
As illustrated in FIG. 9, in the in-line 6-cylinder engine of each specification , the fuel injection order to each cylinder is the first cylinder, the fifth cylinder, the third cylinder, the sixth cylinder, the second cylinder, and the fourth cylinder. In order to match,
In the case of making the same direction rotation specification , the fuel injection camshaft (21), (22), (23), (24), (25), and (26) remains connected in the different direction rotation specification. 15) With the rotation ( b ) , the fuel injection sequence becomes the first cylinder, the fourth cylinder, the second cylinder, the sixth cylinder, the third cylinder, and the fifth cylinder. The connection of the fuel injection pipes (24) and (25) is changed, the connection of the fuel injection pipes (22) and (23) of the second cylinder and the third cylinder is changed, and the fuel injection order is changed to that of the different direction rotation specification. A manufacturing method of a multi-cylinder engine characterized by matching.
[0012]
(Invention of Claim 6 )
Invention specific matters of the invention of claim 6 are as follows.
The method for differentiating a multi-cylinder engine according to claim 1 ,
As illustrated in FIG. 10, when the in-line 6-cylinder engine of each specification is made separately, the order of fuel injection to each cylinder in each specification is defined as the first cylinder, the fourth cylinder, the second cylinder, the sixth cylinder, In order to match the order of the 3rd cylinder and the 5th cylinder,
In the case of making the same direction rotation specification , the fuel injection camshaft (21), (22), (23), (24), (25), and (26) remains connected in the different direction rotation specification. 15) With the rotation ( b ) , the fuel injection sequence becomes the first cylinder, the fifth cylinder, the third cylinder, the sixth cylinder, the second cylinder, and the fourth cylinder. The connection of the fuel injection pipes (24) and (25) is changed, the connection of the fuel injection pipes (22) and (23) of the second cylinder and the third cylinder is changed, and the fuel injection order is changed to that of the different direction rotation specification. A manufacturing method of a multi-cylinder engine characterized by matching.
[0013]
【The invention's effect】
(Invention of claims 1 to 6 )
The inventions according to claims 1 to 6 have the following effects.
<Effect 1> It is not necessary to manufacture a dedicated fuel injection camshaft for each specification.
When manufacturing an engine of each specification , the fuel injection cam shaft (15) can be used as a common part, and it is not necessary to manufacture a dedicated fuel injection cam shaft (15) for each specification .
[0014]
[0015]
<< Effect 2 >> The valve camshaft can also be used as a common part.
When manufacturing a multi-cylinder engine of each specification, the order of fuel injection to each cylinder can be matched, so that the timing of the valve can be matched in each specification, and the valve camshaft (17) is also a common part Can be used as
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view for explaining a fuel injection camshaft used in the engine manufacturing method according to the first embodiment of the present invention. Figures 2-6 is an explanatory view of a manufacturing method of an engine according to a first embodiment of the present invention, FIG. 7 is a schematic view for illustrating a manufacturing method for an engine according to a second embodiment of the present invention, the Figure 8 of the present invention illustration of a manufacturing method of an engine according to embodiment 3, FIG. 9 is a schematic view for illustrating a manufacturing method of an engine according to a fourth embodiment of the present invention, FIG. 10 is a manufacturing method of an engine according to a fifth embodiment of the present invention It is explanatory drawing.
In each embodiment, the following is performed.
As shown in FIG. 2, by interposing a single gear (29) between the crank gear (31) and the fuel injection cam gear (33), the rotational direction of the fuel injection cam shaft (15) and (b) A multi-cylinder engine having a clockwise direction in the same direction as the crankshaft ( 34 ) is a multi-cylinder engine having the same direction of rotation.
As shown in FIG. 4, by interposing a pair of gears ( 29 ) ( 30 ) between the crank gear ( 31 ) and the fuel injection cam gear ( 33 ) , the rotational direction of the fuel injection cam shaft ( 15 ) ( a ) Is a multi-cylinder engine with a different direction from the crankshaft ( 34 ) .
As shown in FIG. 1, when the fuel injection camshaft ( 15 ) and the row type fuel injection pump ( 16 ) are used as a common part and the crankshaft ( 34 ) has the same rotation direction, the above specifications are used. the fuel injection cam shaft (15), the cam projections (11) (12) (13) cam surfaces for each fuel injection in the rotational direction end portions of the (14) (11a) (11b) (12a) (12b) the (13a) (13b) (14a ) (14b) is provided,
As shown in FIGS. 6 to 10, in each of the above specifications, the combination of the connection between the fuel discharge port of the fuel injection pump ( 16 ) by the fuel injection pipe and the fuel injection nozzle of each cylinder is made different. The order of injection to each cylinder is matched.
[0017]
The outline of this embodiment is as follows.
Fuel injection cam shaft of the engine shown in FIG. 1 (15) intended to be capable of handling any of the crank shaft (34) different from the direction of rotation (a) and the same rotational direction (b), first shown in FIGS. 2-6 In the first embodiment , an in-line four-cylinder engine of each specification is manufactured using the fuel injection camshaft (15) of FIG. 1, and in the second embodiment shown in FIG. 7, the fuel injection camshaft (15) of FIG. to produce other series 4-cylinder engine of each specification with reference to, in the third embodiment shown in FIG. 8, to produce a series three-cylinder engine of each specification with reference to the fuel injection cam shaft in Fig 1 equivalent structure, In the fourth embodiment shown in FIG. 9 and the fifth embodiment shown in FIG. 10, an in-line 6-cylinder engine of each specification is manufactured using a fuel injection camshaft having the same structure as that in FIG.
[0018]
The configuration of the fuel injection cam shaft (15) shown in FIG. 1 is as follows.
The fuel injection camshaft (15) is for an in-line four-cylinder engine, and includes four cam projections (11), (12), (13), and (14) as shown in FIG. . Reference numeral (11) is a cam protrusion for the first cylinder, (12) is a cam protrusion for the second cylinder, (13) is a cam protrusion for the third cylinder, and (14) is a cam protrusion for the fourth cylinder. . A drive cam (18) for the fuel supply pump is disposed between the cam projection (13) for the third cylinder and the cam projection (14) for the fourth cylinder. As shown in FIG. 1 (B), the cam surfaces (11a) (11b) (12a) (12b) for fuel injection are provided at both ends in the rotational direction of the cam projections (11) (12) (13) (14). (13a), (13b), (14a), and (14b) are provided, and fuel injection can be performed even if the rotation direction is different from the rotation direction (a) or the same rotation direction (b) from the crankshaft ( 34 ). I am doing so. Reference numeral (11a) is a cam surface for different direction rotation injection of the cam projection (11) for the first cylinder, (11b) is a cam surface for same direction rotation injection of the cam projection (11) for the first cylinder, (12a) Is the cam surface for different direction rotation injection of the cam projection (12) for the second cylinder, (12b) is the cam surface for same direction rotation injection of the cam projection (12) for the second cylinder, and (13a) is the third cylinder. The cam projection for the opposite direction of the cam projection (13), (13b) is the cam projection surface for the same direction of the cam projection (13) for the third cylinder, and (14a) is the cam projection for the fourth cylinder. (14) Different direction rotational injection cam surface, (14b) is the same direction rotational injection cam surface of the cam projection (14) for the fourth cylinder.
[0019]
The outline of the first embodiment is as follows.
In the first embodiment, the fuel injection camshaft (15) in FIG. 1 is used as a common part, and the fuel injection camshaft (15) is rotated in a rotational direction ( a ) different from that of the crankshaft ( 34 ) . series 4-cylinder engine counter-rotating design a series four-cylinder engine in the same direction rotation specifications of FIGS. 2 and 3 to rotate the fuel injection cam shaft (15) in a different direction of rotation (b) a crankshaft (34) Manufacturing.
[0020]
The common points of the engine of each specification are as follows.
4 and FIG. 5, the engine of the different direction rotation specification will be described. As shown in FIG. 5, a gear case (20) is provided at the front of the cylinder block (19), and a cylinder head is provided above the cylinder block (19). (27), and four fuel injection nozzles are attached to the cylinder head (27). A fuel injection pump (16) is attached to a front side portion of the left side surface of the cylinder block (19), and four fuel injection ports and fuel injection nozzles of the four plungers of the fuel injection pump (16) are connected to four injections. It connects with pipe | tube (21) (22) (23) (24). The engine of the same direction rotation specification shown in FIGS. 2 and 3 has the same structure. 2 and 3, the same reference numerals as those in FIGS. 4 and 5 are attached to the same elements as those of the engine of the different direction rotation specification .
[0021]
The differences between the engines of each specification are as follows.
These engines differ in the structure of the gear train. As shown in FIG. 4, the gear train (28a) of the engine of the different direction rotation specification includes a pair of idle gears (29) and (30) between the crank gear ( 31 ) and the fuel injection cam gear ( 33 ) . On the other hand, as shown in FIG. 2, the gear train (28b) of the engine of the same direction rotation type has only a single idle gear (29).
[0022]
The configuration of the gear train (28a) of the engine of the different direction rotation specification is as follows.
The gear train (28a) of the engine of the different direction rotation type shown in FIG. 4 meshes the first idle gear (29) with the crank gear (31) and the valve drive cam gear (32) with the first idle gear (29). The second idle gear (30) is engaged with the second idle gear (30), and the fuel injection cam gear (33) is engaged with the second idle gear (30). As shown in FIG. 4, the rotational direction of each gear of the gear train (28a) of the engine of the different direction rotation specification is such that when viewed from the front, the crank gear (31) rotates clockwise and the first idle gear (29) counterclockwise. In the clockwise direction, both the valve drive cam gear (32) and the second idle gear (30) rotate clockwise, and the fuel injection cam gear (33) counterclockwise.
[0023]
The configuration of the gear train (28b) of the engine of the same direction rotation specification is as follows.
The gear train (28b) of the engine of the same direction rotation type shown in FIG. 2 meshes the idle gear (29) with the crank gear (31), and the valve gear cam gear (32) and the fuel injection cam gear ( 33). The idle gear (29) and the first idle gear (29) of the forward engine are the same. As shown in FIG. 2, the rotation direction of each gear of the gear train (28b) of the reverse engine is as follows. When viewed from the front, the crank gear (31) rotates clockwise and the idle gear (29) rotates counterclockwise. The cam gear (32) and the fuel injection cam gear (33) rotate clockwise.
[0024]
Common parts are the crankshaft (34), the valve drive camshaft (17), the fuel injection camshaft (15), the fuel injection pump (16), the crank gear (31), the idle gear (29), and the valve drive cam gear (32). ) And a fuel injection cam gear (33). When these are used as common parts and a multi-cylinder engine with different direction rotation specifications and same direction rotation specifications is manufactured, the order of fuel injection to each cylinder in each specification is matched. In this case, the connection state of the fuel injection pipes (21), (22), (23), and (24) is made different for each specification, so that the combination of the connection between the fuel discharge port of the fuel injection pump (16) and the fuel injection nozzle is achieved. Different for each specification.
[0025]
Expressions such as cylinder numbers are as follows.
In FIG. 6, the cylinder in the cylinder block (19) represents a cylinder, the cylinder number represents the cylinder number, the small circle within the great circle represents the fuel injection nozzle of each cylinder, and the inside of the fuel injection pump (16). The fuel discharge port is represented by a small circle, and the arrangement of the fuel discharge port is represented by a number below it. The cylinder numbers are the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder from the right to the left in the drawing. The fuel discharge ports are arranged as a first discharge port, a second discharge port, a third discharge port, and a fourth discharge port from the right to the left in the drawing. 7 to 10 are also expressed in the same manner.
[0026]
The setting of the fuel injection sequence to each cylinder in the engine of the different direction rotation specification is as follows.
As shown in FIG. 6 (A), the crank pin arrangement of the crankshaft (34) of this engine is 180 degrees in two directions, and the first cylinder connecting rod and the fourth cylinder connecting rod are connected to one, and the other is connected to the other. The third cylinder connecting rod and the second cylinder connecting rod are connected. The crankshaft (34) rotates clockwise as viewed from the front. As shown in FIG. 6A, in the engine of the same direction rotation specification, the first cylinder fuel injection nozzle is connected to the first discharge port via the first fuel injection pipe (21), and the second discharge port is connected to the first discharge port. A second cylinder fuel injection nozzle is connected via the second fuel injection pipe (22), a third cylinder fuel injection nozzle is connected to the third discharge port via the third fuel injection pipe (23), A fourth cylinder fuel injection nozzle is connected to the four discharge ports via a fourth fuel injection pipe (24). In this case, the order of fuel injection to each cylinder is the order of the first cylinder, the third cylinder, the fourth cylinder, and the second cylinder.
[0027]
The method of matching the fuel injection order with the engine of the same direction rotation specification and the engine of the different direction rotation specification is as follows.
Crank shaft (34) and a fuel injection pump (16) is using the common parts of the engine of counter-rotating specification, the cylinder block (19) is the engine of the counter-rotating specification is a separate part, The same cylinder arrangement is used. As shown in FIG. 6 (B), when the engine of the same direction rotation specification is manufactured , the fuel injection pipes (21), (22), (23), and (24) of the different direction rotation specification remain connected. Since the fuel injection order becomes the first cylinder, the second cylinder, the fourth cylinder, and the third cylinder depending on the rotation direction ( b ) of the injection camshaft (15), the fuel injection pipes of the second cylinder and the third cylinder ( 22) The connection of (23) is changed. That is, the second fuel injection pipe (22) is connected to the third cylinder fuel injection nozzle instead of the second cylinder fuel injection nozzle, and the third fuel injection pipe (23) is not the third cylinder fuel injection nozzle. Connected to a 2-cylinder fuel injection nozzle. As a result, the order of fuel injection into each cylinder is in the order of the first cylinder, the third cylinder, the fourth cylinder, and the second cylinder, and is consistent with the case of the different direction rotation specification .
[0028]
The outline of the second embodiment is as follows.
The second embodiment shown in FIG. 7 is related to the in-line four-cylinder engine as in the first embodiment shown in FIG. 6, but the injection order is different. In the first embodiment, the first cylinder, the third cylinder, In the second embodiment, the fourth cylinder and the second cylinder are the first cylinder, the second cylinder, the fourth cylinder, and the third cylinder. The common parts of the engine of the different direction rotation specification and the engine of the same direction rotation specification , and the method of matching the injection order in the case of manufacturing are the same as in the first embodiment. In FIG. 7, the same elements as those in the first embodiment are denoted by the same reference numerals as those in FIG.
[0029]
The outline of the third embodiment is as follows.
The third embodiment shown in FIG. 8 relates to an in-line three-cylinder engine, unlike the four-cylinder first embodiment shown in FIG. In this third embodiment, as shown in FIG. 8 (A), the crank pin arrangement of the crank shaft (34) of the engine is in three directions every 120 degrees, and the first pin is connected to the crank pin clockwise. The connecting rod for the cylinder, the connecting rod for the third cylinder, and the connecting rod for the second cylinder are connected. The crankshaft (34) rotates clockwise as viewed from the front. As shown in FIG. 8 (A), in the engine of the different direction rotation specification, the first cylinder fuel injection nozzle is connected to the first discharge port via the first fuel injection pipe (21), and the second discharge port is connected to the second discharge port. The second cylinder fuel injection nozzle is connected via the second fuel injection pipe (22), and the third cylinder fuel injection nozzle is connected to the third discharge port via the third fuel injection pipe (23). . In this case, the order of fuel injection into each cylinder is the order of the first cylinder, the third cylinder, and the second cylinder. As shown in FIG. 8 (B), when making the engine corotating specifications, while the connection state of the fuel injection pipe of the counter-rotating specifications (21) (22) (23), the fuel injection cam shaft ( 15) Since the fuel injection order is the first cylinder, the second cylinder, and the third cylinder according to the rotational direction ( b ) of 15), the fuel injection pipes (22) and (23) of the second cylinder and the third cylinder are connected. change. That is, the second fuel injection pipe (22) is connected to the third cylinder fuel injection nozzle instead of the second cylinder fuel injection nozzle, and the third fuel injection pipe (23) is not the third cylinder fuel injection nozzle. Connected to a 2-cylinder fuel injection nozzle. As a result, the order of fuel injection to each cylinder is in the order of the first cylinder, the third cylinder, and the second cylinder, and is consistent with that of the different direction rotation specification .
[0030]
The outline of the fourth embodiment is as follows.
The fourth embodiment shown in FIG. 9 is different from the four-cylinder first embodiment shown in FIG. 6 and relates to an in-line six-cylinder engine. In this fourth embodiment, as shown in FIG. 9 (A), the crank pin arrangement of the crank shaft (34) of the engine is in three directions every 120 degrees, and the first pin is in the clockwise direction on the crank pin. The connecting rod for the cylinder, the connecting rod for the sixth cylinder, the connecting rod for the third cylinder, the connecting rod for the fourth cylinder, the connecting rod for the second cylinder, and the connecting rod for the fifth cylinder are connected. The crankshaft (34) rotates clockwise as viewed from the front. As shown in FIG. 9 (A), in the engine of the different direction rotation specification, the first cylinder fuel injection nozzle is connected to the first discharge port via the first fuel injection pipe (21), and the second discharge port is connected to the second discharge port. A second cylinder fuel injection nozzle is connected via the second fuel injection pipe (22), a third cylinder fuel injection nozzle is connected to the third discharge port via the third fuel injection pipe (23), A fourth cylinder fuel injection nozzle is connected to the four discharge ports via the fourth fuel injection pipe (24), and a fifth cylinder fuel injection nozzle is connected to the fifth discharge port via the fifth fuel injection pipe (25). The sixth cylinder fuel injection nozzle is connected to the sixth discharge port via the sixth fuel injection pipe (26). In this case, the order of fuel injection to each cylinder is the order of the first cylinder, the fifth cylinder, the third cylinder, the sixth cylinder, the second cylinder, and the fourth cylinder.
[0031]
As shown in FIG. 9B, when the engine of the same direction rotation specification is manufactured, the connection state of the fuel injection pipes (21) (22) (23) (24) (25) (26) of the different direction rotation specification As it is, the fuel injection order becomes the first cylinder, the fourth cylinder, the second cylinder, the sixth cylinder, the third cylinder, and the fifth cylinder depending on the rotation direction ( b ) of the fuel injection camshaft (15). The connection between the fuel injection pipes (22) and (23) of the second and third cylinders is changed, and the connection between the fuel injection pipes (24) and (25) of the fourth and fifth cylinders is changed. That is, the second fuel injection pipe (22) is connected to the third cylinder fuel injection nozzle instead of the second cylinder fuel injection nozzle, and the third fuel injection pipe (23) is not the third cylinder fuel injection nozzle. The fuel injection nozzle for two cylinders is connected, the fourth fuel injection pipe (24) is connected to the fuel injection nozzle for the fifth cylinder instead of the fuel injection nozzle for the fourth cylinder, and the fifth fuel injection pipe (25) is connected to the fifth fuel injection nozzle. It is connected not to the cylinder fuel injection nozzle but to the fourth cylinder fuel injection nozzle. As a result, the order of fuel injection to each cylinder is in the order of the first cylinder, the fifth cylinder, the third cylinder, the sixth cylinder, the second cylinder, and the fourth cylinder, which is the same as that of the different direction rotation specification .
[0032]
The outline of the fifth embodiment is as follows.
The fifth embodiment shown in FIG. 10 is related to an in-line 6-cylinder engine, similar to the fourth embodiment shown in FIG. 9, but the connection state to the crankpin is different. In the fourth embodiment, the crankpin includes In the clockwise direction, the connecting rod for the first cylinder and the connecting rod for the sixth cylinder, the connecting rod for the third cylinder and the connecting rod for the fourth cylinder, the connecting rod for the second cylinder and the connecting rod for the fifth cylinder are connected. In the fifth embodiment, the crankpin includes a first cylinder connecting rod and a sixth cylinder connecting rod, a second cylinder connecting rod and a fifth cylinder connecting rod, a third cylinder connecting rod and a fourth cylinder connecting rod in a clockwise direction. It is connected. In the fifth embodiment, the injection order is different. In the fourth embodiment, the first cylinder, the fifth cylinder, the third cylinder, the sixth cylinder, the second cylinder, and the fourth cylinder are used in the fifth embodiment. In the embodiment, the first cylinder, the fourth cylinder, the second cylinder, the sixth cylinder, the third cylinder, and the fifth cylinder are used. The common parts of the engine of the different direction rotation specification and the engine of the same direction rotation specification and the method of matching the injection order in the case of manufacturing are the same as those in the fourth embodiment. In FIG. 10, the same elements as those in the fourth embodiment are denoted by the same reference numerals as those in FIG.
[Brief description of the drawings]
FIG. 1 is a view for explaining a fuel injection camshaft used in an engine manufacturing method according to a first embodiment of the present invention, FIG. 1 (A) is a side view, and FIG. 1 (B) is FIG. FIG. 1C is a front view of the first cylinder cam projection, and FIG. 1D is a sectional view taken along the line DD of FIG. 1A.
FIG. 2 is a partially cutaway front view of the engine of the same direction rotation specification obtained by the engine manufacturing method according to the first embodiment of the present invention .
FIG. 3 is a side view of the engine of FIG. 2;
FIG. 4 is a partially cutaway front view of an engine with a different direction rotation specification obtained by the method for manufacturing an engine according to the first embodiment of the present invention .
FIG. 5 is a side view of the engine of FIG. 4;
A diagram illustrating the connection state of the fuel injection pipe of each specification of the manufacturing method of an engine according to a first embodiment of the invention; FIG 6 (A) is that of counter-rotating design, FIG. 6 ( B) shows the same direction rotation specification.
A diagram illustrating the connection state of the fuel injection pipe of each specification of the manufacturing method of an engine according to a second embodiment of the present invention; FIG 7 (A) is that of counter-rotating design, FIG. 7 ( B) shows the same direction rotation specification.
A diagram illustrating the connection state of the fuel injection pipe of each specification of the manufacturing method for an engine according to a third embodiment of the present invention; FIG 8 (A) is that of counter-rotating design, FIG. 8 ( B) shows the same direction rotation specification.
A diagram illustrating the connection state of the fuel injection pipe of each specification of the manufacturing method for an engine according to a fourth embodiment of the present invention; FIG 9 (A) is that of counter-rotating design, FIG. 9 ( B) shows the same direction rotation specification.
A diagram illustrating the connection state of the fuel injection pipe of each specification of the manufacturing method for an engine according to a fifth embodiment of the invention; FIG, 10 (A) is that of counter-rotating design, FIG. 10 ( B) shows the same direction rotation specification.
[Explanation of symbols]
(11) (12) (13) (14) ... cam protrusion, (11a) (11b) (12a) (12b) (13a) (13b) (14a) (14b) ... cam surface, (a) ... different rotation Direction , (b) ... same rotation direction , (15) ... fuel injection camshaft, (16) ... fuel injection pump, (21) (22) (23) (24) (25) (26) ... fuel injection pipe, ( 34 ) ... crankshaft .

Claims (6)

Crank gear ( 31 ) And fuel injection cam gear ( 33 ) Single gear between ( 29 ) By interposing the fuel injection camshaft ( 15 ) Direction of rotation ( b ) The crankshaft ( 34 ) The multi-cylinder engine with the same direction as the multi-cylinder engine with the same direction rotation specification,
Crank gear ( 31 ) And fuel injection cam gear ( 33 ) A pair of gears between ( 29 ) ( 30 ) By interposing the fuel injection camshaft ( 15 ) Direction of rotation ( a ) The crankshaft ( 34 ) A multi-cylinder engine with a different direction and a multi-cylinder engine with a different direction rotation specification,
Fuel injection camshaft ( 15 ) And row type fuel injection pump ( 16 ) And crankshaft as a common part ( 34 ) When manufacturing multi-cylinder engines of the above specifications with the same rotation direction,
Fuel injection camshaft ( 15 ) The cam projection ( 11 ) ( 12 ) ( 13 ) ( 14 ) Fuel injection cam surfaces at both ends in the rotation direction ( 11a ) ( 11b ) ( 12a ) ( 12b ) ( 13a ) ( 13b ) ( 14a ) ( 14b ) Provided,
Fuel injection pump with fuel injection pipe for each of the above specifications ( 16 ) The method of manufacturing a multi-cylinder engine is characterized in that the order of injection to each cylinder in each specification is matched by changing the combination of the connection between the fuel discharge port and the fuel injection nozzle of each cylinder. The method of manufacturing a multi-cylinder engine according to claim 1 ,
In the in-line four-cylinder engine of each specification, in order to make the fuel injection order to each cylinder coincide in the order of the first cylinder, the third cylinder, the fourth cylinder, and the second cylinder,
When making those corotating specification, while in the connected state of the fuel injection pipe in the counter-rotating specifications (21) (22) (23) (24), the rotational direction of the fuel injection cam shaft (15) ( b ) By changing the connection of the fuel injection pipes (22), (23) of the second cylinder and the third cylinder , the fuel injection order becomes the first cylinder, the second cylinder, the fourth cylinder, and the third cylinder. A method for manufacturing a multi-cylinder engine, characterized in that the fuel injection order is made to coincide with that of a different direction rotation specification . The method of manufacturing a multi-cylinder engine according to claim 1 ,
In the in-line four-cylinder engine of each specification, in order to make the fuel injection order to each cylinder the same in the order of the first cylinder, the second cylinder, the fourth cylinder, and the third cylinder,
When manufacturing the same direction rotation specification, the rotation ( b ) of the fuel injection camshaft (15) remains in the connected state of the fuel injection pipes (21) (22) (23) (24) in the different direction rotation specification. ) , The connection of the fuel injection pipes (22) and (23) of the second cylinder and the third cylinder is changed for those in which the fuel injection order is the first cylinder, the third cylinder, the fourth cylinder, and the second cylinder. The method for manufacturing a multi-cylinder engine is characterized in that the fuel injection sequence is matched with that of the different direction rotation specification . The method of manufacturing a multi-cylinder engine according to claim 1 ,
In the inline three-cylinder engine of each specification, in order to match the fuel injection order to each cylinder in the order of the first cylinder, the third cylinder, and the second cylinder,
When manufacturing the same direction rotation specification , the fuel injection camshaft (15) is rotated ( b ) with the fuel injection pipes (21), (22) and (23) connected in the different direction rotation specifications . fuel injection sequence, the first cylinder, second cylinder, what the third cylinder, by changing the connection of the fuel injection pipe of the second cylinder and the third cylinder (22) (23), the fuel injection order of different A method for manufacturing a multi-cylinder engine, characterized by matching with that of a direction rotation specification . The method of manufacturing a multi-cylinder engine according to claim 1 ,
In the in-line 6-cylinder engine of each specification, in order to make the fuel injection order to each cylinder coincide in the order of the first cylinder, the fifth cylinder, the third cylinder, the sixth cylinder, the second cylinder, and the fourth cylinder,
In the case of making the same direction rotation specification , the fuel injection camshaft (21), (22), (23), (24), (25), and (26) remains connected in the different direction rotation specification. 15) With the rotation ( b ) , the fuel injection sequence becomes the first cylinder, the fourth cylinder, the second cylinder, the sixth cylinder, the third cylinder, and the fifth cylinder. The connection of the fuel injection pipes (24) and (25) is changed, the connection of the fuel injection pipes (22) and (23) of the second cylinder and the third cylinder is changed, and the fuel injection order is changed to that of the different direction rotation specification. A manufacturing method of a multi-cylinder engine characterized by matching. The method of manufacturing a multi-cylinder engine according to claim 1 ,
In the in-line 6-cylinder engine of each specification, in order to make the fuel injection order to each cylinder the same in the order of the first cylinder, the fourth cylinder, the second cylinder, the sixth cylinder, the third cylinder, and the fifth cylinder,
In the case of making the same direction rotation specification , the fuel injection camshaft (21), (22), (23), (24), (25), and (26) remains connected in the different direction rotation specification. 15) With the rotation ( b ) , the fuel injection sequence becomes the first cylinder, the fifth cylinder, the third cylinder, the sixth cylinder, the second cylinder, and the fourth cylinder. The connection of the fuel injection pipes (24) and (25) is changed, the connection of the fuel injection pipes (22) and (23) of the second cylinder and the third cylinder is changed, and the fuel injection order is changed to that of the different direction rotation specification. A manufacturing method of a multi-cylinder engine characterized by matching.

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