JP2006283567A - Manufacturing method of engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of an engine by which manufacturing cost of engines with different specifications can be suppressed. <P>SOLUTION: In a manufacturing method of an engine for manufacturing an engine with standard specification for supplying engine oil from an oil filter 2 to a bearing 3 without an oil cooler 4 and an engine with oil cooler specification for supplying engine oil cooled with the oil cooler from the oil filter 2 to the bearing 3, crank cases 6 having the same structure and including an oil pump 1 and a bearing 3 in a crankcase end wall 7 and a filter mounting seat 9 in a crankcase side wall 8 are employed as standardized parts commonly used in the specifications of the engine. As work common to manufacture of engines with the specifications, a pump discharge passage 10 and a cleaned oil introduction passage 11 are formed in the crankcase side wall 7, and an oil filter 2 is mounted in the filter mounting seat 9a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an engine manufacturing method, and more particularly, to an engine manufacturing method capable of suppressing the manufacturing cost of a different specification engine.

  As shown in FIG. 4 or 5, the present invention supplies an oil oil from the oil pump chamber (1) to the bearing (3) via the oil filter (2). (4) Without a standard engine that supplies engine oil from the oil filter (2) to the bearing (3) without the engine oil cooled by the oil cooler (4) illustrated in FIG. 5 from the oil filter (2) to the bearing The present invention relates to an engine manufacturing method for manufacturing an oil cooler engine supplied to the section (3).

  In conventional engine manufacturing methods, when manufacturing engines with different specifications, crankcases with different structures are used for each specification, and the work of forming the passage is not common to each other. Yes.

The above prior art has the following problems.
<Problem> Engine manufacturing costs are high.
Since crankcases with different structures are used for each specification and the passage formation work is not common to each other, the parts cost and work cost are high, and the engine manufacturing cost is high.

  It is an object of the present invention to provide an engine manufacturing method capable of solving the above-described problems, that is, an engine manufacturing method capable of suppressing the manufacturing cost of a different specification engine.

Invention specific matters of the invention according to claim 1 are as follows.
As shown in FIG. 4 or FIG. 5, when supplying engine oil from the oil pump chamber (1) to the bearing (3) via the oil filter (2), there is no oil cooler (4) illustrated in FIG. The engine engine supplies engine oil from the oil filter (2) to the bearing section (3) and engine oil cooled by the oil cooler (4) illustrated in FIG. 5 from the oil filter (2) to the bearing section (3). An engine manufacturing method for manufacturing an oil cooler specification engine to be supplied to
As illustrated in FIG. 3, a crankcase (6) having the same structure as a part common to engines of each specification is provided with an oil pump chamber (1) and a bearing portion (3) on the crankcase end wall (7). Using a filter case seat (9) supplied to the crankcase side wall (8),
As illustrated in FIG. 4 or FIG. 5, as work common to the manufacture of engines of each specification, a pump discharge passage (10) and an oil purification introduction passage (11) are provided in the crankcase end wall (7). Regardless of the difference, the pump discharge passage (10) is formed with the same structure, and the opening of the pump discharge passage (10) communicates with the oil pump discharge chamber (12), and the terminal opening (13) of the pump discharge passage (10) is connected to the filter mounting seat. (9), the passage inlet (14) of the oil purification introduction oil passage (11) is opened by the filter mounting seat (9), and the passage outlet of the oil purification introduction passage (11) is opened by the bearing portion (3). Attach the oil filter (2) to the filter mounting seat (9),
As shown in FIG. 4, when a standard engine is manufactured, the pump discharge passage (10) is left open by the filter mounting seat (9) so that the pump discharge passage (10) is left open. The passage (10) is communicated with the unpurified oil chamber (15) of the oil filter (2) through the terminal opening (13),
As illustrated in FIG. 5, when manufacturing an oil cooler engine, a hot oil outlet passage (17) and a cold oil inlet passage (18) are formed in the crankcase side wall (8), and the hot oil outlet passage is formed. The passage inlet (19) of (17) is connected to the pump discharge passage (10), and between the passage outlet (20) of the hot oil outlet passage (17) and the passage inlet (21) of the cold oil introduction passage (18). The oil cooler (4) is interposed in the passage, the passage outlet (22) of the cold oil introduction passage (18) is opened by the filter mounting seat (9), and the terminal opening (13) of the pump discharge passage (10) is plugged (23 ) To seal the pump discharge passage (10) of the oil filter (2) through the hot oil outlet passage (17), the oil cooler (4), and the cold oil introduction passage (18) in this order. A method for manufacturing an engine, characterized in that the engine is communicated with an unpurified chamber (15).

(Invention according to Claim 1)
<Effect> The manufacturing cost of the engine can be suppressed.
As shown in FIG. 3, a crankcase (6) having the same structure is used as a part common to engines of each specification, and work common to the manufacture of engines of each specification as shown in FIG. 4 or FIG. In order to form the pump discharge passage (10) and the oil purification introduction passage (11) in the crankcase end wall (7) in the same structure by the same drilling operation regardless of the difference in specifications, By the work to be performed, the parts cost and the work cost are reduced, and the manufacturing cost of the engine can be suppressed.

<Effect> Individual work for each specification is also easy.
As shown in FIG. 4, when a standard specification engine is manufactured, the terminal opening (13) of the pump discharge passage (10) is left open by the filter mounting seat (9), and is illustrated in FIG. Thus, when manufacturing an oil cooler engine, a hot oil outlet passage (17) and a cold oil inlet passage (18) are formed in the crankcase side wall (8), and the hot oil outlet passage (17) is formed. An oil cooler (4) is interposed between the passage outlet (20) and the passage inlet (21) of the cold oil introduction passage (18), and the terminal opening (13) of the pump discharge passage (10) is plugged by a plug (23). Since it only has to be sealed, individual work for each specification is also easy.

(Invention according to Claim 2)
In addition to the effect of the invention according to claim 1, the following effect is achieved.
<Effect> It is easy to form a passage in common work.
As illustrated in FIG. 4 or FIG. 5, the formation of the pump discharge passage (10) and the oil purification introduction passage (11), which are operations common to the manufacture of engines of each specification, is separated from the crankcase body (6a). Since the work is performed by drilling the cover (6b) with a drill, the work at the time of drilling with the drill is reduced, and the passage formation in the common work is facilitated.

(Invention according to claim 3)
In addition to the effect of the invention according to claim 2, the following effect is achieved.
<Effect> Drilling in common work is simplified.
As illustrated in FIG. 4 or FIG. 5, as an operation common to the manufacture of the engine of each specification, when the hydraulic passage is composed of the hydraulic introduction passage (29) and the hydraulic introduction passage (31), 29) is formed by drilling from the mating surface (26) of the lid (6b) toward the pump discharge passage (10) with a drill, and the hydraulic pressure introduction passage (31) is formed on the receiving surface of the crankcase body (6a) ( Since the drilling is performed by drilling along the side wall (30) of the crankcase body from 25), each drilling distance by the drill can be shortened, and the drilling operation is simplified.

<Effect> Drilling in an individual operation of an oil cooler engine becomes easy.
As shown in FIG. 5, when an oil cooler engine is manufactured, the hot oil outlet passage (17) is formed by a hole in which the hydraulic pressure introduction passage (31) is perforated, and the crankcase body side wall (30) continues. Since the material is perforated, it is easy to perforate the oil cooler engine individually.

(Invention of Claim 4)
In addition to the effect of the invention according to claim 2 or claim 3, the following effect is achieved.
<Effect> Leakage of engine oil to the outside of the crankcase is suppressed.
As illustrated in FIG. 4 or FIG. 5, in order to form the inlet opening (39) of the relief valve mounting hole (38) on the side of the mating surface (26) of the lid (6b), the relief valve mounting hole (38) Even if engine oil leaks from the inlet opening (39), it flows into the crankcase (6), so that leakage of engine oil to the outside of the crankcase (6) is suppressed.

  Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 9 are diagrams for explaining a method for manufacturing an engine according to an embodiment of the present invention. In this embodiment, a method for manufacturing a V-type air-cooled gasoline engine will be described.

The outline of the manufacturing method according to the embodiment of the present invention is as follows.
As shown in FIG. 4 or FIG. 5, when supplying engine oil from the oil pump chamber (1) to the bearing (3) via the oil filter (2), there is no oil cooler (4) illustrated in FIG. The engine engine supplies engine oil from the oil filter (2) to the bearing section (3) and engine oil cooled by the oil cooler (4) illustrated in FIG. 5 from the oil filter (2) to the bearing section (3). This is an engine manufacturing method for manufacturing an oil cooler specification engine supplied to the engine.

The configuration of the standard specification engine is as follows.
As shown in FIG. 7, when viewed in a direction parallel to the crankshaft (40), a pair of cylinders (41) (41) are projected from the crankcase (6) diagonally upward and left and right, and each cylinder (41) A cylinder head (42) is assembled to the protruding end of the cylinder, and a head cover (43) is assembled to the cylinder head (42). An air cleaner (44) is disposed above the crankcase (6).

  As shown in FIG. 8, a crankshaft (40) and a valve operating camshaft (45) are installed in the crankcase (6). A carburetor (49) is communicated with the air cleaner (44) via an intake pipe (48), and an intake manifold (50) is communicated with the carburetor (49). A fan case (49) is provided in front of the crankcase (6), and a cooling fan (50) is accommodated therein. Engine oil (46) is stored in the inner bottom of the crankcase (6), and an oil strainer (47) is immersed therein. An oil pump chamber (1) is formed in the crankcase end wall (7), and engine oil (47) is sucked into the oil pump chamber (1). As shown in FIG. 6, an oil filter (2) and a hydraulic pressure sensor (27) are attached to the left side of the crankcase (6).

The configuration of the oil cooler engine is as follows.
As shown in FIG. 9, the oil cooler (4) is arranged on the left side of the fan case (49). The oil cooler (4) is connected to the crankcase (6) by a hot oil outlet pipe (51) and a cold oil introduction pipe (52). The other structure is the same as that of the standard specification engine. In FIG. 9, the same elements as those in FIG.

The parts common to the engine of each specification are as follows.
As shown in FIG. 3, the crankcase (6) has the same structure, the crankcase end wall (7) is provided with an oil pump chamber (1) and a bearing portion (3), and the crankcase side wall (8) is provided. A filter mounting seat (9) is used. Specifically, the crankcase (6) has a divided structure comprising a crankcase body (6a) shown in FIG. 1 and a lid (6b) shown in FIG. An end opening (24) and a receiving surface (25) provided around the end opening (24) are provided, and the lid (6b) has a mating surface (26), a crankcase end wall (7), and an oil pump chamber. (1) A bearing portion (3) and a filter mounting seat (9) are provided.

Operations common to the production of engines of each specification are as follows.
As shown in FIG. 4 or FIG. 5, the pump discharge passage (10) and the oil purification introduction passage (11) are formed in the same structure in the same drilling operation in the crankcase end wall (7) regardless of the difference in specifications. Then, the opening of the pump discharge passage (10) is communicated with the oil pump discharge chamber (12), the terminal opening (13) of the pump discharge passage (10) is opened by the filter mounting seat (9), and oil purification is introduced. The passage inlet (14) of the oil passage (11) is opened by the filter mounting seat (9), the passage outlet of the oil purification introduction passage (11) is opened by the bearing portion (3), and the oil is passed through the filter mounting seat (9). Install the filter (2). As shown in FIG. 8, the oil pump chamber (1) accommodates the rotor (54) and is covered with a lid plate (55) to form a trochoid pump. The drilling operation is performed by drilling with a drill, but the drilling operation may be performed by inserting a pin during casting of the crankcase (6) and removing the pin after casting. The passage having the same structure means a passage having the same shape at the same position (hereinafter the same).

When manufacturing a standard engine, the following individual operations are performed.
As shown in FIG. 4, by leaving the terminal opening (13) of the pump discharge passage (10) opened by the filter mounting seat (9), the pump discharge passage (10) is opened at the terminal opening (13). To communicate with the unpurified oil chamber (15) of the oil filter (2).

When manufacturing an oil cooler engine, the following individual operations are performed.
As shown in FIG. 5, a hot oil outlet passage (17) and a cold oil inlet passage (18) are formed in the crankcase side wall (8), and the passage inlet (19) of the hot oil outlet passage (17) is pumped out. An oil cooler (4) is interposed between the passage outlet (20) of the hot oil outlet passage (17) and the passage inlet (21) of the cold oil introduction passage (18). By opening the passage outlet (22) of the introduction passage (18) with the filter mounting seat (9) and sealing the terminal opening (13) of the pump discharge passage (10) with the plug (23), The pump discharge passage (10) is communicated with the unpurified oil chamber (15) of the oil filter (2) through the lead-out passage (17), the oil cooler (4), and the cold oil introduction passage (18) in this order.

  The cold oil introduction passage (18) is partially formed across the crankcase body (6a) and the lid (6b), and the opening of each part is opened by the receiving surface (25) and the mating surface (26), By covering the end opening (24) of the crankcase body (6a) with the lid (6b), the respective parts of the cold oil introduction passage (18) are connected. Formation of each part of this cold oil introduction channel | path (18) is performed by performing the drilling operation | work by a drill from a receiving surface (25) and a mating surface (26). Formation of the passage outlet (22) of the cold oil introduction passage (18) is performed by drilling with a drill from the filter mounting seat (9).

The ideas for common work are as follows.
As shown in FIG. 4 or FIG. 5, the pump discharge passage (10) and the oil purification introduction passage (11), which are operations common to the manufacture of engines of each specification, are separated from the crankcase body (6a). This is done by drilling the lid (6b) with a drill.

Other ideas are as follows.
As shown in FIG. 4 or FIG. 5, a hydraulic sensor (27) having the same structure is used as a component common to engines of each specification. As operations common to the manufacture of engines of each specification, a hydraulic pressure outlet passage (29) is provided in the lid side wall (28), and a hydraulic pressure introduction passage (31) and a hydraulic sensor mounting hole (32) are provided in the crankcase body side wall (30). Regardless of the difference in specifications, the same structure is formed by the same drilling operation, and the passage inlet of the hydraulic pressure discharge passage (29) is communicated with the pump discharge passage (10). The passage outlet (33) of the hydraulic pressure release passage (29) is opened at the mating surface (26) of the lid (6b), and the passage start end (34) of the hydraulic pressure introduction passage (31) is the receiving surface of the crankcase body (6a). (25), and the outlet of the hydraulic sensor mounting hole (32) communicates with the passage end (35) of the hydraulic pressure introduction passage (31). By inserting the hydraulic sensor (27) into the hydraulic sensor mounting hole (32) from the inlet and mounting it, the end opening (24) of the crankcase body (6a) is covered with the lid body (6b), so that the hydraulic pressure discharge passage ( 29) and the passage inlet (34) of the hydraulic pressure introduction passage (31) are communicated with each other.

  In performing this common operation, the hydraulic pressure outlet passage (29) is formed by drilling with a drill from the mating surface (26) of the lid (6b) toward the pump discharge passage (10). The passage (31) is formed by drilling with a drill from the receiving surface (25) of the crankcase body (6a) along the side wall (30) of the crankcase body. As shown in FIG. 4, when a standard specification engine is manufactured, the back end of the hydraulic pressure introduction passage (31) is kept closed with the material of the crankcase body side wall (30). As shown in FIG. 5, when an oil cooler specification engine is manufactured, the warm oil outlet passage (17) is formed by a hole in which the hydraulic pressure introduction passage (31) is perforated, and subsequently the material of the crankcase body side wall (30). This is done by drilling.

Other ideas are as follows.
As shown in FIG. 4 or FIG. 5, the relief valve (37) having the same structure is used as a part common to the engine of each specification, and the relief valve is applied to the lid (6b) as an operation common to the manufacture of the engine of each specification. Regardless of the difference in specifications, the mounting hole (38) is formed in the same structure by the same drilling operation, the rear end opening of the relief valve mounting hole (38) is communicated with the pump discharge passage (10), and the relief valve is mounted. The relief valve (37) is assembled into the hole (38) from the inlet opening (39). In doing so, the inlet opening (39) of the relief valve mounting hole (38) is formed on the mating surface (26) side of the lid (6b). The relief valve mounting hole (38) accommodates the relief valve (37) and the valve spring (53) and is covered with a lid plate (55).

It is a rear view of the crankcase main body used as the component common in the manufacturing method of the engine which concerns on embodiment of this invention. FIG. 2A is a side view, and FIG. 2B is a front view, illustrating a lid body that is a common component in an engine manufacturing method according to an embodiment of the present invention. FIG. 3 (A) is a cross-sectional exploded view of a crankcase that is a common part in an engine manufacturing method according to an embodiment of the present invention. FIG. 3 (A) is a cross-sectional view taken along the line AA of FIG. B) is a cross-sectional position taken along the line BB in FIG. FIG. 4A is a cross-sectional plan view of a crankcase for explaining a method for manufacturing a standard specification engine among methods for manufacturing an engine according to an embodiment of the present invention. FIG. 4A is a cross-sectional view taken along the line AA in FIG. FIG. 4B is a cross-sectional view taken along the line BB in FIG. FIG. 2 is a cross-sectional plan view of a crankcase for explaining an oil cooler engine manufacturing method of the engine manufacturing method according to the embodiment of the present invention, with the upper half portion taken along the AA cross section of FIG. The lower half is at the BB cross-sectional position in FIG. It is a side view of the standard specification engine obtained with the manufacturing method of the engine concerning the embodiment of the present invention. It is a rear view of the standard specification engine shown in FIG. It is a vertical side view of the standard specification engine shown in FIG. It is a side view of the oil cooler specification engine obtained with the manufacturing method of the engine concerning the embodiment of the present invention.

Explanation of symbols

(1) Oil pump chamber, (2) Oil filter, (3) Bearing, (4) Oil cooler, (6) Crank case, (6a) Crank case body, (6b) Lid , (7) crankcase end wall, (8) crankcase side wall, (9) filter mounting seat, (10) pump discharge passage, (11) oil purification introduction passage, (12) oil pump discharge Chamber, (13) end opening of pump discharge passage, (14) passage inlet of oil purification introduction oil passage, (15) unfiltered chamber of oil filter, (17) hot oil outlet passage, (18) …… Cool oil introduction passage, (19) Passage inlet of warm oil discharge passage, (20) Passage exit of warm oil discharge passage, (21) Passage entrance of cold oil introduction passage, (22) Cold oil introduction passage Passage exit, (23) plug, (24) end opening, (25) receiving surface, (26) mating surface, (27) hydraulic sensor, (28) lid side wall, (29) …… Hydraulic outlet passage , (30) crankshaft body side wall, (31) hydraulic pressure introduction passage, (32) hydraulic pressure sensor mounting hole, (33) hydraulic pressure outlet passage exit, (34) hydraulic introduction passage start, 35) ... end of hydraulic introduction passage, (37) relief valve, (38) relief valve mounting hole, (39) inlet opening.

Claims (4)

When supplying engine oil from the oil pump chamber (1) to the bearing (3) via the oil filter (2), engine oil is supplied from the oil filter (2) to the bearing (3) without an oil cooler (4). An engine manufacturing method for manufacturing a standard specification engine to be supplied and an oil cooler specification engine for supplying engine oil cooled by an oil cooler (4) to a bearing portion (3) from an oil filter (2),
As a part common to the engine of each specification, it is a crankcase (6) of the same structure, the crankcase end wall (7) is provided with the oil pump chamber (1) and the bearing portion (3), and the crankcase side wall ( 8) with a filter mounting seat (9)
As work common to the production of engines of each specification, the pump discharge passage (10) and the oil purification introduction passage (11) in the crankcase end wall (7) have the same structure in the same drilling operation regardless of the difference in specifications. The opening of the pump discharge passage (10) is communicated with the oil pump discharge chamber (12), and the terminal opening (13) of the pump discharge passage (10) is opened by the filter mounting seat (9). The passage inlet (14) of the oil introduction oil passage (11) is opened by the filter mounting seat (9), the passage outlet of the oil purification introduction passage (11) is opened by the bearing portion (3), and the filter mounting seat (9) Attach the oil filter (2) to the
When a standard engine is manufactured, the terminal opening (13) of the pump discharge passage (10) is left open by the filter mounting seat (9), so that the pump discharge passage (10) is opened at the terminal opening. (13) communicate with the unpurified oil chamber (15) of the oil filter (2),
When an oil cooler engine is manufactured, a hot oil outlet passage (17) and a cold oil introduction passage (18) are formed in the crankcase side wall (8), and the passage inlet (19) of the hot oil outlet passage (17) is formed. ) In communication with the pump discharge passage (10), and an oil cooler (4) is interposed between the passage outlet (20) of the hot oil outlet passage (17) and the passage inlet (21) of the cold oil introduction passage (18). The passage outlet (22) of the cold oil introduction passage (18) is opened by the filter mounting seat (9), and the terminal opening (13) of the pump discharge passage (10) is sealed by the plug (23). Thus, the pump discharge passage (10) is connected to the unpurified oil chamber (15) of the oil filter (2) through the hot oil outlet passage (17), the oil cooler (4), and the cold oil introduction passage (18) in this order. A method for manufacturing an engine, characterized in that communication is performed. In the manufacturing method of the engine according to claim 1,
A crankcase (6) having the same structure as a part common to engines of each specification has a split structure composed of a crankcase body (6a) and a lid (6b), and the crankcase body (6a) is an end. And a receiving surface (25) provided around the end opening (24). The lid (6b) has a mating surface (26), a crankcase end wall (7), an oil pump chamber ( 1) Using a bearing provided with a bearing (3) and a filter mounting seat (9)
The pump discharge passage (10) and the oil purification introduction passage (11), which are operations common to the manufacture of engines of each specification, are formed by drilling the cover (6b) separated from the crankcase body (6a) by drilling. The manufacturing method of the engine characterized by performing by. In the manufacturing method of the engine according to claim 2,
A hydraulic sensor (27) having the same structure is used as a part common to engines of each specification,
As operations common to the manufacture of engines of each specification, a hydraulic pressure outlet passage (29) is provided in the lid side wall (28), and a hydraulic pressure introduction passage (31) and a hydraulic sensor mounting hole (32) are provided in the crankcase body side wall (30). Regardless of the difference in specifications, they are formed in the same structure by the same drilling operation, the passage inlet of the hydraulic pressure discharge passage (29) is connected to the pump discharge passage (10), and the passage outlet (33 of the hydraulic pressure discharge passage (29)) ) Is opened at the mating surface (26) of the lid (6b), the passage start end (34) of the hydraulic pressure introduction passage (31) is opened at the receiving surface (25) of the crankcase body (6a), and the hydraulic sensor mounting hole The outlet of (32) communicates with the passage end (35) of the hydraulic pressure introduction passage (31), and the hydraulic sensor (27) is inserted from the inlet into the hydraulic sensor mounting hole (32) and attached to the crankcase body (6a). By covering the end opening (24) with a lid (6b), the hydraulic outlet passage (29) can be opened. (33) and Upon communicating the passage inlet (34) of the hydraulic introduction passage (31),
Formation of the hydraulic pressure discharge passage (29) is performed by drilling with a drill from the mating surface (26) of the lid (6b) toward the pump discharge passage (10), and formation of the hydraulic pressure introduction passage (31) is performed on the crank. By drilling with a drill along the side wall (30) of the crankcase body from the receiving surface (25) of the case body (6a),
When manufacturing a standard specification engine, leave the back end of the hydraulic pressure introduction passage (31) closed with the material of the crankcase body side wall (30),
When an oil cooler engine is manufactured, the hot oil outlet passage (17) is formed by drilling the hydraulic pressure introduction passage (31) and continuously drilling the material of the crankcase body side wall (30). An engine manufacturing method characterized by the following. In the manufacturing method of the engine according to claim 2 or 3,
Using a relief valve (37) with the same structure as a part common to engines of each specification,
As an operation common to the manufacture of engines of each specification, a relief valve mounting hole (38) is formed in the lid (6b) in the same structure by the same drilling operation regardless of the difference in the specifications, and this relief valve mounting hole ( 38) is connected to the pump discharge passage (10) and the relief valve (37) is assembled from the inlet opening (39) to the relief valve mounting hole (38).
An engine manufacturing method, wherein an inlet opening (39) of a relief valve mounting hole (38) is formed on a mating surface (26) side of a lid (6b).

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