JP2015061360A - Diesel engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new diesel engine including a compact electric generator which effectively utilizes a fly wheel.SOLUTION: In a diesel engine 1, a fly wheel 30 is attached to one end of a crank shaft 10. The diesel engine 1 includes an electric generator which is formed by disposing multiple magnets 50 in an outer periphery part of the fly wheel 30 at a regular interval and providing a stator coil 60, which is disposed facing the magnets 50, at a fly wheel case 40 serving as a case of the fly wheel 30.

Description

  The present invention relates to a diesel engine.

The diesel engine compresses the air in the cylinder to a high pressure, for example, a compression ratio of around 20 by the movement of the piston, sprays diesel fuel (light oil) onto the air in the cylinder that has become hot due to the compression heat, and self-ignitions the fuel particles This is an engine that causes combustion / explosion, pushes down the piston with the explosion pressure, and converts the kinetic energy into rotational energy of the crankshaft via the connecting rod.
Therefore, an electric system is not necessarily required because the diesel engine does not require an electric spark to ignite the fuel. However, the diesel engine is also equipped with an alternator (alternator) driven by a belt from the crankshaft. The AC power generated by the operation of the engine is converted into direct current and used for charging the battery, It is used to supply engine-equipped equipment to electrical equipment.
In recent years, the use of diesel engines, which are economical in terms of fuel consumption, has expanded, and strict exhaust gas regulations are being introduced to diesel engines.
For this reason, it has become necessary to precisely control the fuel supply amount and fuel injection timing using an electronic device such as an ECU in accordance with the load conditions and operating environment of the diesel engine. The power generator has become essential for diesel engines.

In Patent Document 1, magnets (27, 28) are provided on a plurality of flywheels (16, 17) mounted on one end of an engine crankshaft (2), and opposing coils (31, 32) are fixed to the engine. The generator provided in the section (2, 29) is disclosed.
Patent Document 2 discloses an engine power generation in which a rotor (13) is provided outside a flywheel (11) attached to a crankshaft (14), and a stator (12) is provided in a housing (9) of the flywheel (11). A machine is disclosed.
In Patent Document 3, a rotor (40) made of a magnet is provided on a flywheel (30) fixed to a crankshaft (20), and a stator (coil) is made of a coil on an oil seal (24) or its housing (26). 44) is provided.
Patent Document 4 discloses an engine in which a permanent magnet (81C) is provided on a first flywheel (81) and a coil (82B) is provided on a second flywheel (82) that rotates in reverse.

Japanese Patent Laid-Open No. 10-4650 JP 2002-238214 A Japanese Patent Laid-Open No. 2005-20908 JP 2012-206632 A

  The technologies of Patent Documents 1, 3, and 4 disclose a power generation system using a flywheel, but are technologies based on a gasoline engine. The technique of Patent Document 2 discloses a generator based on a co-generator engine that can also be applied to a diesel engine. A rotor (13) and a stator (12) are provided outside a flywheel (11). ) Has a problem that the apparatus becomes bulky as a whole.

  SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a novel diesel engine equipped with a compact generator that effectively uses the flywheel to solve the above-described conventional problems.

In order to achieve the above object, a diesel engine of the present invention is a diesel engine in which a flywheel is attached to one end of a crankshaft, and a plurality of magnets are arranged at regular intervals on the outer periphery of the flywheel. A first feature is that a generator is provided in which a stator coil disposed to face the magnet is provided in a flywheel case which is a case of the flywheel.
In the diesel engine of the present invention, in addition to the first feature described above, the magnet is disposed on the centripetal surface of the ring-shaped flange portion projecting outward at the outer peripheral portion of the flywheel, and the stator coil includes the flywheel. For the stator mounting plate that is detachably attached to the tip of the flywheel case located on the outer side, on the centrifugal surface of the ring-shaped thick mount that protrudes inward from the center of the stator mounting plate The second feature is that they are arranged.
In the diesel engine of the present invention, in addition to the first feature described above, the magnet is disposed on the centripetal surface of the ring-shaped flange portion that protrudes inwardly at the outer peripheral portion of the flywheel, and the stator coil is the flywheel. The third feature is that it is arranged on the centrifugal surface of the ring-shaped thick mount portion projecting outward from the center of the base end portion of the flywheel case on the inner side.
In addition to the first feature, the diesel engine of the present invention has a fourth feature that the stator coil is directly fixed to the crankcase instead of being fixed to the flywheel case.
Further, in addition to any of the first to fourth features, the diesel engine of the present invention is configured not to constitute transmission means including a transmission belt for transmitting driving force from the alternator and the crankshaft to the alternator. It has the characteristics of

According to the diesel engine according to claim 1, by using a flywheel attached to one end of the crankshaft of the diesel engine, a plurality of magnets are arranged on the outer peripheral portion thereof, and the stator is arranged to face the magnets. Since the generator is made by fixing the coil to the flywheel case,
It is possible to easily generate a sufficient amount of electric power with the rotation of the flywheel. Therefore, supply sufficient amount of power to operate with the electronic equipment necessary to precisely control the fuel supply amount or fuel injection timing according to the load conditions and operating environment of the diesel engine. Is possible.
Since an existing flywheel can be used as a generator by placing magnets on the outer periphery of the flywheel and fixing the stator coil to the existing flywheel case, It is possible to construct a power generation system with a simple structure and low cost by directly using the diesel engine.
According to the diesel engine of the second aspect, in addition to the function and effect of the configuration of the first aspect, the magnet is disposed on the centripetal surface of the ring-shaped flange portion protruding outward at the outer peripheral portion of the flywheel. The stator coil has a ring shape that protrudes inwardly from the center of the stator mounting plate with respect to the stator mounting plate that is detachably mounted on the tip of the flywheel case located outside the flywheel. Since it is arranged on the centrifugal surface of the thick mount part,
By using a flywheel or flywheel case, a flywheel with a magnet is attached to the crankshaft, and a stator mounting plate with a stator coil is attached as part of the flywheel case, making it really easy. In addition, the generator can be assembled and configured at a low cost.
In particular, according to the diesel engine having the structure described in claim 2, when repairing, inspecting, etc., the stator mounting plate is simply removed from the flywheel case without removing the flywheel itself. There is an advantage that inspection and replacement can be performed.

According to the diesel engine of the third aspect, in addition to the function and effect of the configuration of the first aspect, the magnet is disposed on the centripetal surface of the ring-shaped flange portion protruding inwardly at the outer peripheral portion of the flywheel. Since the stator coil is disposed on the centrifugal surface of the ring-shaped thick mount portion protruding outward from the center of the base end portion of the flywheel case inside the flywheel,
As with the first and second aspects, a power generation system with a simple structure and low cost can be constructed.
In addition, the configuration of the generator can be introduced in a compact state without increasing the bulk of the flywheel or the flywheel case because the stator coil is arranged inside the flywheel.
According to the diesel engine of the fourth aspect, in addition to the operational effect of the configuration of the first aspect, the stator coil is configured to be directly fixed to the crankcase instead of being fixed to the flywheel case.
The stator coil is attached to a firmer and more stable crankcase, and good power generation can be performed with the stator coil being more stable.
According to the diesel engine of the fifth aspect, in addition to the function and effect of any one of the first to fourth aspects, the transmission means includes a transmission belt for transmitting driving force from the alternator and the crankshaft to the alternator. Does not constitute
A sufficient weight reduction of the diesel engine can be achieved.

It is the side view of the diesel engine which concerns on the 1st Embodiment of this invention, and is the surface which showed the part by which the flywheel is arrange | positioned with the cross section. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a diesel engine according to a first embodiment of the present invention, and blades are indicated by two-dot chain lines. It is the side view of the diesel engine which concerns on the 2nd Embodiment of this invention, and is the figure which showed the part by which the flywheel is arrange | positioned with the cross section. It is a whole perspective view which shows the example of the conventional diesel engine.

  Hereinafter, with reference to each drawing, the diesel engine concerning the embodiment of the present invention is explained, and it serves for an understanding of the present invention. However, the following description does not limit the present invention described in the claims.

First, the diesel engine 1 according to the first embodiment shown in FIGS. 1 and 2 is a water-cooled inline three-cylinder engine. The air in the cylinder is compressed to a high pressure (compression ratio of around 20) by the movement of the piston, fuel (light oil) is injected in a mist form into the air in the cylinder that has become hot due to this compression, and self-ignition of the combustion particles Combustion / explosion is caused, the piston is pushed down by the explosive force, and the kinetic energy is converted into the rotational energy of the crankshaft 10.
The end of the crankshaft 10 protrudes from the crankcase 20 to the outside of the case 20, and the flywheel 30 is detachably attached to the end by a fixing means, for example, a bolt 71.

The flywheel 30 is detachably fixed by fixing means, for example, bolts 71, at the end of the crankshaft 10 protruding outward from the crankcase 20.
The flywheel 30 is entirely formed on the wall surface on the proximal end side of the flywheel case 40 except for the cap-shaped protrusion receiving portion 32 configured at the center portion (center portion) and the flange portion 31 provided on the outer peripheral portion. It is configured in a so-called inwardly recessed state so as to be arranged close to each other. With this configuration, the flywheel 30 is devised so as not to protrude further outward from the end of the crankshaft 10 and become bulky.
Here, “inward” means the base end direction (rightward in FIG. 1) of the rotation axis of the crankshaft 10. Further, “outward” is opposite to “inward” and means a distal direction (leftward in FIG. 1) in the rotation axis of the crankshaft 10.
The flywheel 30 is fitted into the end of the crankshaft 10 by the protrusion receiving portion 32 and is detachably fixed by a fixing means, for example, a bolt 71.

The flange 31 forms a ring-shaped outward flange 31 projecting outward from the outer periphery of the flywheel 30. Here, “outward” is as described above.
A plurality of magnets 50 are arranged and fixed at a fixed interval on the centripetal surface of the ring-shaped flange 31 on the outer peripheral portion of the flywheel 30, that is, the surface facing the rotational axis. Therefore, the magnet 50 rotates around its rotational axis as the flywheel 30 rotates.
The magnet 50 is specifically a permanent magnet, but can also be an electromagnet.

The flywheel case 40 is detachably fixed to the crankcase 20 at a flat portion (right side in FIG. 3) of the base end portion.
A stator mounting plate 41 for mounting the stator coil 60 is disposed at the tip of the flywheel case 40 (left side in FIG. 3). The stator mounting plate 41 is detachably fixed to the flywheel case 40 by fixing means, for example, bolts 72.
The stator mounting plate 41 is formed with a ring-shaped thick mount portion 42 for mounting the stator coil 60 at the center thereof.
The stator coil 60 has its core portion 61 fixedly attached to the ring-shaped thick mount portion 42 of the stator mounting plate 41 by a fixing means such as a bolt 73.
The stator coil 60 is disposed on the smaller diameter side (small radius side) than the magnet 50 and is disposed so as to face the magnet 50.
The stator coil 60 and the magnet 50 rotating around the stator coil 60 constitute a generator.

The assembly of the flywheel 30, the flywheel case 40, the magnet 50, the stator coil 60, etc. can be performed as follows, for example.
First, the flywheel case 40 is attached to the crankcase 20 at the flat portion at the base end. Next, the flywheel 30 to which the magnet 50 is previously attached is detachably fixed to the end of the crankshaft 10 with bolts 71 or the like. Next, the stator attachment plate 41 with the stator coil 60 attached in advance is attached to the flywheel case 40.

According to the diesel engine according to the first embodiment, the magnet 50 is arranged on the centripetal surface of the flange portion 31 of the outer peripheral portion of the flywheel 30, and the stator coil 60 is arranged on the smaller diameter side than the magnet 50. By setting it as the structure to perform, using the flywheel 30 and the flywheel case 40, a generator can be comprised compactly in sufficient space saving.
In addition, the magnet 50 and the stator coil 60 are not attached to the main member of the engine such as the crankshaft 10 or the crankcase 20, but are disposed on the detachable flywheel 30 and the flywheel case 40. Since it is installed, there is an advantage that it can be added and installed without difficulty even with an existing diesel engine later.
These generators are attached by detachably fixing the flywheel 30 to which the magnet 50 is fixed to the end of the crankshaft 10, and then attaching and detaching the flywheel case 40 having the stator coil 60 detachably attached to the crankcase 20. All you need to do is fix it, and you can complete the installation very easily. Of course, repair and maintenance of the generator can be easily performed without touching the main body of the diesel engine.
In particular, according to the diesel engine according to the first embodiment, the stator coil 60 can be inspected and replaced without removing the flywheel 30 only by removing the stator mounting plate 41 from the flywheel case 40. There is a merit that can be done.

  FIG. 3 shows a diesel engine 2 according to a second embodiment of the present invention. This diesel engine 2 is a water-cooled in-line three-cylinder engine, similar to the diesel engine 1 according to the first embodiment shown in FIG. The air in the cylinder is compressed to a high pressure (compression ratio of around 20) by the movement of the piston, fuel (light oil) is injected in a mist form into the air in the cylinder that has become hot due to this compression, and self-ignition of the combustion particles Combustion / explosion is caused, the piston is pushed down by the explosive force, and the kinetic energy is converted into the rotational energy of the crankshaft 10.

In the diesel engine 2 according to the second embodiment, the configuration and arrangement of the flywheel 130, the flywheel case 140, the magnet 150, and the stator coil 160 are different from those of the first embodiment.
The flywheel 130 is formed with a ring-shaped inward flange 131 that protrudes inwardly from the outer periphery thereof. Here, “inward” means the base end direction (rightward in FIG. 3) of the rotation axis of the crankshaft 10.
A plurality of magnets 150 are arranged at fixed intervals and fixed to the centripetal surface of the ring-shaped flange 131 on the outer peripheral portion of the flywheel 30, that is, the surface facing the rotational axis. Therefore, the magnet 150 rotates around its rotational axis as the flywheel 130 rotates.
The magnet 150 is specifically a permanent magnet, but can also be an electromagnet.
The flywheel 130 is detachably fixed to the end of the crankshaft 10 by a bolt 171 at the center thereof.

The ring-shaped magnet 150 is disposed on the flywheel 130 side, whereas the stator coil 160 is disposed in a ring-shaped manner on the flywheel case 140 side.
The position and arrangement of the stator coil 160 are arranged such that the distance (radius) from the rotational axis of the stator coil 160 is a smaller diameter than the magnet 150 by a certain distance, and facing (facing) the magnet 150. The
The ring-shaped stator coil 160 is configured to be detachably fixed to the flywheel case 140. The flywheel case 140 is configured to be detachably fixed to the crankcase 20 at the flat portion at the base end thereof.

The flywheel case 140 is formed with a ring-shaped thick mount portion 141 for attaching the stator coil 160 at the center of the base end portion thereof. The center of the ring-shaped thick mount portion 141 is a through hole, and the crankshaft 10 passes therethrough.
The stator coil 160 has its core portion 161 fixed to the ring-shaped thick mount portion 141 of the flywheel case 140 by a fixing means such as a bolt 172 so as to be detachable.
The stator coil 160 and the magnet 150 rotating around the stator coil 160 constitute a generator.

The magnet 150 is disposed on the centripetal surface of the flange 131 on the outer peripheral portion of the flywheel 130, and the stator coil 160 is disposed on the inner side of the flywheel 130 and on the smaller diameter side of the magnet 150. By using the flywheel 130 and the flywheel case 140, the generator can be configured in a compact and sufficiently space-saving manner.
In addition, the magnet 150 and the stator coil 160 are not attached to the main member of the engine such as the crankshaft 10 or the crankcase 20, but are disposed on the detachable flywheel 130 and the flywheel case 140. Since it is installed, there is an advantage that it can be added and installed without difficulty even with an existing diesel engine later.
The generator is attached by first fixing the flywheel case 140 with the stator coil 160 detachably attached to the crankcase 20, and then attaching the flywheel 130 with the magnet 150 fixed to the end of the crankshaft 10. It is only necessary to fix it detachably, and the installation can be completed very easily. Of course, repair and maintenance of the generator can be easily performed without touching the main body of the diesel engine.

  In the diesel engine of the first and second embodiments, the stator coil is attached to the flywheel case, but the stator coil that does not need to be rotated is attached to the crankcase that is the case of the crankshaft. It is also possible to directly fix and attach via an attachment member or the like. Since the crankcase is relatively close to the position of the flywheel, such attachment is possible.

  FIG. 4 is a perspective view showing an example of a conventional diesel engine. In the conventional diesel engine 3, the alternator 3a is required. However, in the diesel engine of the present invention, the alternator itself is not necessary, and the transmission means for the alternator including the transmission belt for transmitting the driving force from the crankshaft to the alternator is not configured. Can be achieved.

DESCRIPTION OF SYMBOLS 1 Diesel engine 2 Diesel engine 3 Conventional diesel engine 10 Crankshaft 20 Crankcase 30 Flywheel 31 ridge part 32 Projection receiving part 40 Flywheel case 41 Stator mounting plate 42 Ring-shaped thick mount part 50 Magnet 60 Stator coil 61 Core Part 71 bolt 72 bolt 73 bolt 130 flywheel 131 flange 140 flywheel case 141 ring-shaped thick mount part 150 magnet 160 stator coil 161 core part 171 bolt 172 bolt

Claims (5)

  A diesel engine having a flywheel attached to one end of a crankshaft, wherein a plurality of magnets are arranged at regular intervals on the outer periphery of the flywheel, and a stator coil arranged opposite to the magnets is a flywheel. A diesel engine comprising a generator provided in a flywheel case which is a case of the above.   The magnet is arranged on the centripetal surface of the ring-shaped flange projecting outward at the outer periphery of the flywheel, and the stator coil is detachably attached to the tip of the flywheel case located outside the flywheel. 2. The diesel engine according to claim 1, wherein the stator mounting plate is disposed on a centrifugal surface of a ring-shaped thick mount portion protruding inwardly from a central portion of the stator mounting plate. .   The magnet is disposed on the centripetal surface of the ring-shaped flange that protrudes inwardly at the outer peripheral portion of the flywheel, and the stator coil is outward from the center of the base end portion of the flywheel case located inside the flywheel. The diesel engine according to claim 1, wherein the diesel engine is disposed on a centrifugal surface of a ring-shaped thick-walled mount portion that protrudes into the ring.   The diesel engine according to claim 1, wherein the stator coil is directly fixed to the crankcase instead of being fixed to the flywheel case.   The diesel engine according to any one of claims 1 to 4, wherein a transmission means including a transmission belt for transmitting a driving force from the alternator and the crankshaft to the alternator is not configured.

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