JP7387921B2 - Series hybrid straddle vehicle - Google Patents

Description

The present invention relates to a series hybrid straddle type vehicle.

There is an engine-driven power supply unit that outputs electric power by driving a generator with a power generation engine (for example, Patent Document 1). The engine-driven power supply unit described in Patent Document 1 is a power supply unit installed in a range extender EV. The power generation engine is provided with a balancer. The engine drive power supply unit is suspended by the link mechanism. This suppresses vibrations of the engine drive power supply unit from being transmitted to the frame of the vehicle.

International Publication No. 2012/069201 Specification

When the power generation engine is driven, various vibrations are generated in the power generation engine. The series hybrid straddle type vehicle is equipped with an engine-driven power supply unit including such a power generation engine. The range extender EV described above is an example of a series hybrid straddle-type vehicle. For series hybrid saddle type vehicles, there is a strong tendency for vibration to be suppressed. In addition, the series hybrid straddle type vehicle has a vehicle characteristic in which posture is controlled by the weight shift of the occupant, and is used in a wide range of applications, such as daily use as footwear and leisure use such as touring. Therefore, nimbleness and simplicity are strongly required for series hybrid saddle type vehicles. Therefore, in a series hybrid straddle-type vehicle, it is preferable to be able to efficiently suppress or prevent transmission of vibrations from the power generation engine to the frame while suppressing or preventing an increase in size or complication of the structure.
An object of the present invention is to provide a series hybrid straddle-type vehicle that can efficiently suppress or prevent the transmission of vibrations of the power generation engine to the frame while suppressing or preventing the increase in size and complexity of the structure. be.

The present inventors have studied how to efficiently reduce vibrations generated in the power generation engine of the engine drive power supply unit. The engine drive power supply unit described in Patent Document 1 provides a balancer in the power generation engine to reduce vibrations of the power generation engine. Furthermore, the engine drive power supply unit is suspended from the frame by a link mechanism to suppress vibrations generated in the power generation engine from being transmitted to the frame of the vehicle.
Here, the balancer of the power generation engine described in Patent Document 1 is a uniaxial primary balancer. In this case, the uniaxial primary balancer suppresses vibrations due to the primary inertial force described in Patent Document 1, and the link mechanism suppresses vibrations such as the primary inertial couple from being transmitted to the frame. However, the vibrations generated in the power generation engine include not only vibrations due to the primary inertial force and the primary inertial couple, but also vibrations due to the secondary inertial force. Therefore, in the engine drive power supply unit described in Patent Document 1, vibrations occur due to secondary inertia force, and vibrations of the power generation engine may become complicated, and only a simple support mechanism for the engine drive power supply unit is required. In this case, it may not be possible to suppress vibrations from being transmitted to the frame.

The present inventors have studied how to efficiently suppress the vibrations generated in the engine from being transmitted to the frame, taking into consideration the vibrations caused by the secondary inertia force generated in the power generation engine. During this study, the inventor determined that vibrations caused by the primary inertia force and the primary inertia couple are suppressed by a balancer, and as a result, vibrations caused by the remaining secondary inertia force are suppressed from being transmitted to the frame by a support mechanism. By doing so, we have found that it is possible to suppress or prevent the increase in size and the complexity of the structure, while also suppressing vibrations due to secondary inertial force.
Specifically, a two-axis primary balancer is provided in a power generation engine of an engine drive power supply unit of a straddle-type vehicle to suppress vibrations caused by a primary inertial force and a primary inertial couple. In addition, the support mechanism that suspends the engine drive power supply unit is configured so that the vehicle body supports the engine drive power supply unit in a manner that suppresses rotational vibration around the crankshaft while allowing translational vibration in the cylinder direction due to residual secondary inertia force. Attach to the frame.
Thereby, the balancer provided in the power generation engine suppresses the primary inertia force and the primary inertia couple generated in the power generation engine. At this time, since vibrations due to the secondary inertia force remain in the power generation engine, it is possible to suppress the vibrations due to the remaining secondary inertia force from being transmitted to the frame by the support mechanism. In this way, vibrations generated from the power generation engine of the engine drive power supply unit can be reduced, and the support mechanism can also be specialized for suppressing vibrations caused by the remaining secondary inertial force. As a result, in the series hybrid straddle-type vehicle, it is possible to suppress or prevent an increase in size and a complicated structure, and to efficiently suppress vibrations generated in the power generation engine from being transmitted to the frame.

In order to achieve the above object, according to one aspect of the present invention, a series hybrid straddle type vehicle has the following configuration.
(1) A series hybrid saddle type vehicle,
The series hybrid straddle type vehicle is
car body frame,
a drive motor;
a drive wheel rotatably supported by the vehicle body frame and driven by the drive motor;
a power generation engine having one or more cylinders, and a two-axis primary balancer that suppresses vibrations caused by a primary inertial force and a primary inertia couple; a generator that is driven to generate electricity and supply the generated electricity to the drive motor with or without a power storage device, and is capable of outputting the electricity generated by the generator; an engine drive power supply unit configured not to transmit power output from the engine to the drive wheels;
attached to the vehicle body frame to support the engine drive power supply unit in a manner that suppresses rotational vibration around the crankshaft while allowing translational vibration in the cylinder direction due to the residual secondary inertial force; The translational vibration in the cylinder direction is caused by the secondary inertia force remaining in the power generation engine due to the primary inertia force and the primary inertia couple being suppressed by the two-axis primary balancer. The support mechanism is a translational vibration generated in the cylinder axis direction, and the rotational vibration about the crankshaft is a rotational vibration centered on a line parallel to the crankshaft.

The series hybrid straddle-type vehicle (1) includes a body frame, an engine-driven power supply unit, and a support mechanism.
The engine drive power supply unit includes a power generation engine and a generator. A power generation engine has one or more cylinders and a two-shaft primary balancer. The two-axis primary balancer suppresses vibrations caused by the primary inertial force and the primary inertial couple. The generator is attached to the power generation engine. The generator is driven by the rotation of the crankshaft of the power generation engine to generate electricity, and supplies the generated electricity to the drive motor with or without the power storage device. The engine drive power supply unit is capable of outputting the electric power generated by the generator, and is configured not to transmit the power output from the power generation engine to the drive wheels.
The support mechanism is attached to the vehicle body frame to support the engine drive power supply unit in a manner that suppresses rotational vibration around the crankshaft while allowing translational vibration in the cylinder direction due to residual secondary inertia force. The translational vibration in the cylinder direction due to the residual secondary inertia force is caused by the secondary inertia force remaining in the power generation engine due to the suppression of the primary inertia force and the primary inertia couple by the two-axis primary balancer, as seen in the crank axis direction. This is a translational vibration that occurs in the cylinder axis direction of a power generation engine. Rotational vibration around the crankshaft is rotational vibration centered on a line parallel to the crankshaft.

Vibrations due to primary inertial force are vibrations that occur as a result of the vertical movement of the piston of the power generation engine, and are vibrations that occur in synchronization with the rotation of the engine's crankshaft. Vibrations caused by the primary inertial force mainly occur in the cylinder axis direction. The vibration caused by the primary inertia couple is the vibration caused by the rotational force around the crankshaft of the power generation engine. A two-shaft primary balancer has two balancer shafts parallel to the crankshaft that rotate in opposite directions in synchronization with the rotation of the crankshaft. The two-axis primary balancer can suppress vibrations of the power generation engine due to the primary inertial force and the primary inertial couple. The secondary inertial force is an inertial force that occurs at twice the frequency of the primary inertial force, and is generated in the cylinder axis direction. Being configured to suppress rotational vibration around the crankshaft while allowing translational vibration in the cylinder direction due to the residual secondary inertia force means that the vibration amplitude due to the residual secondary inertia force and the movement of the support mechanism to move in the vibration direction are It is to set the distance and direction.

In the series hybrid straddle-type vehicle of (1), the power generation engine of the engine drive power supply unit is provided with a two-axis primary balancer that suppresses vibrations caused by the primary inertial force and the primary inertial couple. In addition, the support mechanism that suspends the engine drive power supply unit is configured so that the vehicle body supports the engine drive power supply unit in a manner that suppresses rotational vibration around the crankshaft while allowing translational vibration in the cylinder direction due to residual secondary inertia force. Attach to the frame.

Thereby, the primary inertia force and the primary inertia couple generated in the power generation engine are suppressed by the biaxial primary balancer provided in the power generation engine. At this time, since vibrations due to the secondary inertia force remain in the power generation engine, it is possible to suppress the vibrations due to the remaining secondary inertia force from being transmitted to the vehicle body frame by the support mechanism. In this way, vibrations generated from the power generation engine of the engine drive power supply unit can be reduced, and the support mechanism can also be specialized for suppressing vibrations caused by the remaining secondary inertial force. As a result, in the series hybrid straddle-type vehicle, it is possible to efficiently suppress or prevent transmission of vibrations of the power generation engine to the frame while suppressing or preventing an increase in size or complication of the structure.

According to one aspect of the present invention, a series hybrid straddle type vehicle can employ the following configuration.
(2) The series hybrid straddle type vehicle of (1),
The support mechanism is composed of a plurality of pairs of link parts that are a combination of a link mechanism and an elastic body.

In the series hybrid straddle-type vehicle (2), the support mechanism is composed of a plurality of pairs of link portions that are a combination of a link mechanism and an elastic body. As a result, in the (2) series hybrid straddle-type vehicle, the support mechanism has a structure that tolerates vibrations due to secondary inertia force generated in the cylinder axis direction of the engine drive power supply unit, when viewed in the crank axis direction. can do. Further, the support mechanism can have a structure that suppresses vibration in the rotational direction about a line passing through the center of gravity and parallel to the axis of the crankshaft. Therefore, in the series hybrid straddle-type vehicle (2), it is possible to efficiently suppress vibrations generated in the power generation engine from being transmitted to the frame.

According to one aspect of the present invention, a series hybrid straddle type vehicle can employ the following configuration.
(3) The series hybrid saddle type vehicle of (2),
When viewed in the vehicle width direction, the generator has at least a portion overlapped with the power generation engine, and is offset in the vehicle width direction from one or more cylinders of the power generation engine,
The link portions constitute a plurality of pairs, each of which is arranged on the left and right, each having a play that allows displacement in a direction intersecting the direction of operation of the link portion, and For each pair, in the vehicle width direction, the deviation of the distance from each of the link parts of the pair to the center of the cylinder is the deviation of the distance from each of the link parts of the pair to the center of gravity of the engine drive power supply unit. is larger than the deviation of the distance from each of the pair of link portions to the center of the series hybrid straddle type vehicle in the vehicle width direction.

According to the series hybrid straddle-type vehicle (3), the deviation in the distance from each of the pair of link parts to the center of the cylinder in the vehicle width direction is determined by the amount of power supplied to the engine from each of the pair of link parts. greater than the deviation of the distance to the center of gravity of the unit. Furthermore, in the series hybrid saddle type vehicle of (3), the deviation in distance from each of the pair of link parts to the center of the cylinder in the vehicle width direction is greater than the deviation of the distance from each of the pair of link parts to the center of the cylinder. This is larger than the deviation of the distance to the center of the vehicle in the vehicle width direction.
Therefore, the series hybrid straddle-type vehicle (3) has an engine-driven power supply unit that rotates the series hybrid straddle-type vehicle horizontally around the center of gravity of the engine-driven power supply unit and the center of the vehicle. Inertial force is likely to act. However, in the series hybrid straddle-type vehicle (3), the inertial force that causes the body of the series hybrid straddle-type vehicle to rotate in the horizontal direction is transmitted from the power generation engine to the frame due to the link with play. It can be suppressed.

According to one aspect of the present invention, a series hybrid straddle type vehicle can employ the following configuration.
(4) A series hybrid saddle type vehicle according to (2) or (3),
The link portion includes a first pair, a second pair, and a third pair, each of which is arranged on the left and right, and the first pair and the second pair are arranged on the left and right sides. The third pair operates in a direction that allows translational vibration in the cylinder direction due to secondary inertial force, and the third pair suppresses rotational vibration around the crankshaft.

In the series hybrid straddle-type vehicle (4), the link portion is composed of a first pair, a second pair, and a third pair. The first pair and the second pair operate in a direction that allows translational vibration in the cylinder direction due to residual secondary inertia force. The third pair suppresses rotational vibrations about the crankshaft. As a result, when viewed in the direction of the crank axis, the support mechanism has a structure that allows vibration due to residual secondary inertia force generated in the cylinder axis direction of the engine drive power supply unit and suppresses vibration in the rotational direction around the crankshaft. can do. Therefore, in the series hybrid straddle-type vehicle (4), it is possible to efficiently suppress vibrations generated in the power generation engine from being transmitted to the frame.

According to one aspect of the present invention, a series hybrid straddle type vehicle can employ the following configuration.
(5) A series hybrid saddle type vehicle according to any one of (1) to (4),
The power generation engine is a single cylinder engine, a two cylinder engine other than a parallel two cylinder engine with combustion timing crank angles of 90 degrees and 270 degrees, a three cylinder engine, or a four cylinder engine other than a crossplane type parallel four cylinder engine. It is.

In a series hybrid straddle type vehicle, (5) is achieved by suppressing vibrations caused by the primary inertia force and the primary inertia couple by a balancer, and by suppressing vibrations caused by the secondary inertia force from being transmitted to the frame by the support mechanism. Even in the case of a power generation engine for a series hybrid straddle type vehicle, transmission of vibration to the frame can be suppressed.

The terminology used herein is for the purpose of defining particular embodiments only and is not intended to limit the invention. As used herein, the term "and/or" includes any or all combinations of one or more of the associated listed components. As used herein, the use of the terms "including," "comprising," or "having," and variations thereof, refer to the described features, steps, operations, Although identifying the presence of elements, ingredients, and/or equivalents thereof, they may include one or more of steps, acts, elements, components, and/or groupings thereof. As used herein, the terms "attached," "connected," "coupled," and/or their equivalents are used broadly and include direct and indirect attachments, connections, and Contains both combinations. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can include direct or indirect electrical connections or couplings. Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be construed to have meanings consistent with their meanings in the relevant art and the context of this disclosure, and are not explicitly defined herein. It should not be construed in an ideal or overly formal sense unless otherwise specified. It is understood that a number of techniques and steps are disclosed in the description of the invention. Each of these has individual benefits, and each can also be used with one or more, or in some cases all, of the other disclosed techniques. Therefore, in the interest of clarity, this description refrains from unnecessarily repeating all possible combinations of individual steps. Nevertheless, the specification and claims should be read with the understanding that all such combinations are within the scope of the invention and claims.

A new engine-driven power supply unit is described herein. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to one skilled in the art that the invention may be practiced without these specific details. This disclosure is to be considered as illustrative of the invention and is not intended to limit the invention to the particular embodiments illustrated in the drawings or description below.

Regarding series hybrid straddle-type vehicles, a straddled vehicle refers to a vehicle in which a driver sits astride a saddle. Examples of saddle type vehicles include moped type, off-road type, and on-road type motorcycles. Furthermore, the straddle-type vehicle is not limited to a motorcycle, and may be, for example, a tricycle, an ATV (All-Terrain Vehicle), or the like. The tricycle may include two front wheels and one rear wheel, or may include one front wheel and two rear wheels. The drive wheels of the saddle type vehicle may be the rear wheels or the front wheels. Further, the driving wheels of the saddle type vehicle may be both the rear wheels and the front wheels. Further, it is preferable that the straddle-type vehicle is configured to be able to turn in a lean position. A straddle-type vehicle configured to be able to turn in a lean position is configured to turn in a position tilted toward the center of a curve. Thereby, the straddle-type vehicle configured to be able to turn in a lean position resists the centrifugal force that is applied to the vehicle when turning.

The vehicle body frame forms the skeleton of the straddle-type vehicle, and supports components mounted on the straddle-type vehicle, such as a power storage device, an engine drive power supply unit, and a drive motor. The vehicle body frame is composed of a front fork, a frame body, and a swing arm. Examples of the frame body include, but are not limited to, a single cradle type, a double cradle type, a diamond type, and a monocoque type. The vehicle body frame is made up of a front fork, a frame body, and a swing arm, and receives loads from the front wheels and rear wheels.

The power generation engine is, for example, an engine that has a high load area and a low load area. The power generation engine is, for example, a four-stroke engine. A four-stroke engine has a high load region and a low load region during four strokes. A four-stroke engine having a high load region and a low load region is, for example, a single cylinder engine. It also has a high load area and a low load area. A four-stroke engine having a high load region and a low load region includes a continuous non-combustion section of 180 degrees or more during one cycle of 720 degrees.
In a four-stroke engine that has a high load region and a low load region, rotational fluctuations at low rotational speeds are large compared to other types of engines. The high load region refers to a region in one combustion cycle of the engine in which the load torque is higher than the average value of the load torque in one combustion cycle. The low load area refers to an area other than the high load area in one combustion cycle. When looking at the rotation angle of the crankshaft as a reference, the low load range of the engine is wider than the high load range, for example. The compression stroke has overlap with the high load region.
For example, in an engine that has a high load region and a low load region, the starting position of the crankshaft is set so that when the engine starts, the rotational force of the crankshaft has a run-up section to overcome the compression reaction force in the high load region. Can be adjusted.

The generator is, for example, a permanent magnet starter generator. The generator may be a motor that does not use permanent magnets, for example. The permanent magnet generator is, for example, a brushless motor. A brushless motor is a motor that does not have a commutator. The generator is a motor generator that is driven by a power generation engine to generate electricity. The generator may function as a starter motor that starts the engine for power generation. The generator is not limited to this. The permanent magnet generator may be, for example, a brushed DC motor. The brushless motor may be of an outer rotor type or an inner rotor type, for example. Further, the brushless motor may be an axial gap type instead of a radial gap type. Furthermore, the generator may be of a type that does not have a permanent magnet in its rotor, for example.

The support mechanism is, for example, a combination of a link mechanism and an elastic member. The support mechanism may be, for example, either a link mechanism or an elastic member. The elastic member is, for example, a rubber bush. The elastic member may be, for example, damper rubber. The elastic member is a member having elasticity. The elastic member includes, for example, a buffer member, a vibration damping member, a vibration isolating member, and the like. The support mechanism is a connection part or a combination of these connection parts for supporting the power generation engine to the vehicle body frame. The support mechanism supports the power generation engine on the vehicle body frame while allowing vibration of the power generation engine. The connection component that supports the power generation engine on the vehicle body frame while allowing the vibration of the power generation engine is, for example, an elastic member that connects the power generation engine and the frame. A combination of connection parts that supports the power generation engine on the vehicle body frame while allowing vibration of the power generation engine is, for example, a combination of a link mechanism and an elastic member. The elastic member is, for example, a rubber bush. The elastic member may be, for example, an inner and outer cylindrical bushing, a currant bushing, or a damper rubber. The elastic member is a member having elasticity. The elastic member includes, for example, a buffer member, a vibration damping member, a vibration isolating member, and the like. The link mechanism is, for example, a combination of a link plate and a rotation support part. The rotation support part is, for example, a bearing support part constituted by a bearing. Instead of a bearing, the rotation support part may be supported by an elastic body in which a link mechanism is configured to be rotatable, for example.

According to the present invention, an object of the present invention is to provide a series hybrid straddle-type vehicle that can efficiently suppress transmission of vibrations generated in a power generation engine to a frame.

(a) is a left side view showing the configuration of a series hybrid straddle type vehicle according to a first embodiment of the present invention, and (b) is an engine drive power supply of the straddle type vehicle 1 of (a). FIG. 3 is a left side view showing an enlarged configuration of the unit. (a) is an enlarged left side view showing an engine drive power supply unit of a series hybrid straddle type vehicle according to a second embodiment of the present invention; FIG. 3 is a rear view showing an enlarged view of the engine-driven power supply unit of the straddle-type vehicle; FIG. (a) is an enlarged left side view showing an engine drive power supply unit of a series hybrid straddle type vehicle according to a third embodiment of the present invention; FIG. 2 is an enlarged top view of the engine drive power supply unit of the straddle-type vehicle. (a) is an enlarged left side view showing an engine drive power supply unit of a series hybrid straddle type vehicle according to a fourth embodiment of the present invention, and (b) to (d) are (a) FIG. 2 is an enlarged left side view showing a link portion of a support mechanism of an engine-driven power supply unit of the series hybrid straddle-type vehicle.

The present invention will be described below with reference to the drawings.

[First embodiment]
FIG. 1 is a diagram showing the configuration of a series hybrid saddle type vehicle 1 according to a first embodiment of the present invention. Note that, hereinafter, the series hybrid straddle-type vehicle is also simply referred to as a straddle-type vehicle. FIG. 1(a) is a left side view showing the configuration of a straddle-type vehicle 1 according to a first embodiment of the present invention, and FIG. 1(b) is a left side view of the straddle-type vehicle 1 of FIG. 1(a). FIG. 2 is a left side view showing an enlarged configuration of an engine drive power supply unit 20. FIG.
In this specification and the drawings, F indicates the front direction of the straddle-type vehicle 1. B indicates the rear direction of the straddle-type vehicle 1. FB indicates the front-back direction of the straddle-type vehicle 1. U indicates an upward direction in the saddle type vehicle 1. D indicates the downward direction in the straddle-type vehicle 1. UD indicates an up-down direction in the straddle-type vehicle 1. L indicates the left direction in the saddle type vehicle 1. R indicates the right direction in the saddle type vehicle 1. LR indicates the left and right direction in the saddle type vehicle 1. LR is also the vehicle width direction of the saddle type vehicle 1. That is, the vehicle width direction LR of the saddle type vehicle 1 includes both the right direction R and the left direction L of the saddle type vehicle 1.

The straddle-type vehicle 1 shown in FIG. 1A includes a vehicle body frame 10, an engine drive power supply unit 20, and a support mechanism 30.
The engine drive power supply unit 20 includes a power generation engine 21 and a generator 25. The power generation engine 21 has one or more cylinders 211 and a biaxial primary balancer 212. The two-axis primary balancer 212 suppresses vibrations caused by the primary inertial force and the primary inertial couple. The generator 25 is attached to the power generation engine 21. The generator 25 is driven by the rotation of the crankshaft 213 of the power generation engine 21 to generate electricity, and supplies the generated electricity to the drive motor 16 with or without the power storage device 15 . The engine drive power supply unit 20 is configured to be able to output the electric power generated by the generator 25 and not to transmit the power output from the power generation engine 21 to the drive wheels 17 .
The support mechanism 30 is attached to the vehicle body frame 10 so as to support the engine drive power supply unit 20 in a manner that suppresses rotational vibration around the crankshaft 213 while allowing translational vibration in the cylinder direction due to residual secondary inertia force. The translational vibration in the cylinder direction due to the residual secondary inertial force is suppressed by the biaxial primary balancer 212 to suppress the primary inertial force and the primary inertial couple, and the secondary inertial force remaining in the power generation engine 21 causes the cylinder direction translational vibration to move in the direction of the crank axis S. This is a translational vibration that occurs in the direction of the cylinder axis T of the power generation engine 21. Rotational vibration around the crankshaft 213 is rotational vibration centered on a line parallel to the crank axis S.

The vibration X1 due to the primary inertial force shown in FIG. 1(b) is a vibration that occurs due to the reciprocating movement of the piston 214 of the power generation engine 21, and is a vibration that occurs in synchronization with the rotation of the crankshaft 213 of the power generation engine 21. . The vibration X1 due to the primary inertial force mainly occurs in the direction of the cylinder axis T of the cylinder 211. The vibration X2 due to the primary inertia couple is a vibration due to the rotational force around the crankshaft 213 of the power generation engine 21. The two-shaft primary balancer 212 has two balancer shafts 213-1 and 213-2 parallel to the crankshaft 213, which rotate in opposite directions in synchronization with the rotation of the crankshaft 213, and generate electricity using primary inertial force. The vibrations X1 of the power generation engine 21 and the vibrations X2 of the power generation engine 21 caused by the primary inertia couple are suppressed. The secondary inertial force is an inertial force that occurs at twice the frequency of the primary inertial force, and is generated in the direction of the cylinder axis T. The vibration Y1 due to the secondary inertial force has a smaller amplitude than the vibration X1 due to the primary inertial force. Being configured to suppress rotational vibration around the crankshaft 213 while allowing translational vibration in the cylinder direction due to the residual secondary inertial force means that the support mechanism is configured to move in the amplitude and vibration direction of the vibration Y1 due to the residual secondary inertial force. 30 movable distances and directions.

In the saddle type vehicle 1 of this embodiment, the power generation engine 21 of the engine drive power supply unit 20 is provided with a biaxial primary balancer 212 that suppresses vibrations caused by the primary inertial force and the primary inertial couple. Further, the support mechanism 30 that suspends the engine drive power supply unit 20 supports the engine drive power supply unit 20 in a manner that suppresses rotational vibration around the crankshaft 213 while allowing translational vibration in the cylinder direction due to residual secondary inertia force. Attach it to the vehicle body frame 10 as shown.

The engine drive power supply unit 20 of this embodiment suppresses the primary inertial force and the primary inertial couple generated in the power generating engine 21 by the biaxial primary balancer 212 provided in the power generating engine 21. At this time, since vibrations due to the secondary inertia force remain in the power generation engine, it is possible to suppress the vibrations due to the remaining secondary inertia force from being transmitted to the vehicle body frame 10 by the support mechanism 30. In this way, vibrations generated from the power generation engine 21 of the engine drive power supply unit 20 can be reduced, and the support mechanism can also be specialized for suppressing vibrations caused by the remaining secondary inertia force. As a result, in the series hybrid straddle-type vehicle 1, it is possible to efficiently suppress or prevent transmission of vibrations of the power generation engine 21 to the vehicle body frame 10 while suppressing or preventing an increase in size or complication of the structure.

[Second embodiment]
A second embodiment of the present invention will be described. FIG. 2(a) is an enlarged left side view showing the engine drive power supply unit 20 of the straddle-type vehicle 2 according to the second embodiment of the present invention, and FIG. 2(c) is an enlarged rear view of the engine drive power supply unit 20 of the saddle type vehicle 2 shown in FIG. 2(a), and FIG. FIG. In this embodiment, the straddle-type vehicle 2 is configured as follows. In this embodiment, the same components as in the first embodiment are given the same reference numerals as in the straddle-type vehicle 1 shown in FIG.

As shown in FIG. 2(b), the support mechanisms 30 form a plurality of pairs. Specifically, the support mechanisms 30 are provided at the same position on each side of the power generation engine 21 when viewed in the left and right direction, and these are used as one pair (see FIGS. 2(a) and 2(b)). In this embodiment, these pairs are provided at multiple locations on the power generation engine 21. Further, as shown in FIG. 2(c), the support mechanism 30 includes a link portion 31 that is a combination of a link mechanism and an elastic body. Specifically, the link portion 31 is formed by a link plate 312 extending in a direction perpendicular to the crank axis S direction (left-right direction LR) and a bearing support portion 313 having a rotation axis parallel to the crank axis S direction. A mechanism 311 is configured. The link mechanism 311 is configured such that a link plate 312 is rotatable in a direction perpendicular to the crank axis S direction with respect to the vehicle body frame 10. The link mechanism 311 is supported by the vehicle body frame 10 by an elastic body 314 and supported by the power generation engine 21 by an elastic body 315. In the link mechanism 311, the elastic body 314 prevents the link plate 312 from rotating significantly, and the elastic body 315 supports the power generation engine 21 so that it can vibrate.

In this embodiment, by configuring the support mechanism 30 as described above, when viewed in the direction of the crank axis S, the support mechanism 30 is caused to vibrate due to secondary inertia force generated in the direction of the cylinder axis T of the engine drive power supply unit 20. It is possible to create a structure that allows Furthermore, the support mechanism 30 can be structured to suppress rotational vibration around the crankshaft 213. Therefore, in the saddle type vehicle 2 of the present embodiment, it is possible to efficiently suppress vibrations generated in the power generation engine 21 from being transmitted to the vehicle body frame 10.

[Third embodiment]
A third embodiment of the present invention will be described. FIG. 3(a) is an enlarged left side view showing the engine drive power supply unit 20 of the straddle-type vehicle 3 according to the third embodiment of the present invention, and FIG. ) is an enlarged top view showing the engine drive power supply unit 20 of the straddle-type vehicle 3. In this embodiment, the straddle-type vehicle 3 is configured as follows. In this embodiment, the same components as in the first embodiment are given the same reference numerals as in the straddle-type vehicle 1 shown in FIG.

As shown in FIG. 3A, at least a portion of the generator 25 of the straddle-type vehicle 3 overlaps with the power generation engine 21 when viewed in the vehicle width direction LR. As shown in FIG. 3(b), the generator 25 is offset from one or more cylinders 211 of the power generation engine 21 in the vehicle width direction LR. The link portions 31 constitute a plurality of pairs, each of which is arranged on the left and right. Each of the link parts 31 has a play q1 that allows displacement in a direction Q intersecting the direction P of movement of the link part 31. For each pair of link parts 31, the deviation of the distance (q21, q22) from each of the pair of link parts 31 to the center of the cylinder 211 (cylinder axis T) in the vehicle width direction LR is determined by 31 to the center of gravity G of the engine drive power supply unit 20, and is larger than the deviation of the distance (q31, q32) from each of the pair of link parts 31 to the center C of the straddle-type vehicle 1 in the vehicle width direction LR. It is larger than the deviation of the distance (q41, q42).

According to the straddle-type vehicle 3 of the present embodiment, the deviation q2 of the distance from each of the pair of link parts 31 to the center of the cylinder 211 in the vehicle width direction LR is the difference between the distance from each of the pair of link parts 31 to the center of the cylinder 211. It is larger than the deviation q3 of the distance to the center of gravity G of the drive power supply unit 20. Further, according to the straddle-type vehicle 3, the deviation q2 of the distance from each of the pair of link portions 31 to the center of the cylinder 211 in the vehicle width direction LR is greater than the deviation q2 of the distance from each of the pair of link portions 31 to the center of the cylinder 211. It is larger than the deviation q4 of the distance to the center C of the vehicle in the vehicle width direction LR.
Therefore, in the straddle-type vehicle 3 of this embodiment, an inertial force H acts on the engine-driven power supply unit 20 so that the straddle-type vehicle 3 rotates in the horizontal direction about the center of gravity G of the engine-driven power supply unit. It's easy to do. However, in the straddle-type vehicle 3 of the present embodiment, the inertia force H that causes the body of the series hybrid straddle-type vehicle 3 to rotate in the horizontal direction is generated from the power generation engine 21 by the link portion 31 which is a link with play. It is possible to suppress transmission to the vehicle body frame 10.

[Fourth embodiment]
A fourth embodiment of the present invention will be described. FIG. 4(a) is an enlarged left side view showing the engine drive power supply unit 20 of the straddle-type vehicle 4 according to the fourth embodiment of the present invention, and FIGS. 4(b) to 4(d) are 4(a) is an enlarged left side view showing the link portions 32L to 34L of the support mechanism 30 of the engine drive power supply unit 20 of the saddle type vehicle 4 in FIG. 4(a). FIG. In this embodiment, the straddle-type vehicle 4 is configured as follows. In this embodiment, the same components as in the first embodiment are given the same reference numerals as in the straddle-type vehicle 1 shown in FIG.

The link portions of the straddle-type vehicle 4 shown in FIG. 4(a) include a first pair of link portions 32L and 32R arranged on the left and right, and a second pair of link portions 33L and 33R. and a third pair of link portions 34L and 34R. The first pair of link parts 32L and 32R and the second pair of link parts 33L and 33R operate in a direction that allows translational vibration in the cylinder direction (vibration Y1) due to the residual secondary inertia force, and The pair of link portions 34L and 34R suppress rotational vibration (vibration X2) around the crankshaft 213. 4(a) to (d), only the link portions 32L to 34L, which are link portions in the left direction L in the left-right direction LR of the straddle-type vehicle 4, are shown; Link portions 32R to 34R, which are link portions in the right direction R, are not shown.

Specifically, the link portion 32 is formed by a link plate 322 extending in a direction perpendicular to the crank axis S direction (left-right direction LR) and a bearing support portion 323 having a rotation axis parallel to the crank axis S direction. A mechanism 321 is configured. The link mechanism 321 is configured such that a link plate 322 is rotatable in a direction perpendicular to the crank axis S direction with respect to the vehicle body frame 10. The link mechanism 321 is supported by the vehicle body frame 10 by an elastic body 325 at an elastic body support portion 324, and supported by the power generation engine 21 by an elastic body 327 at a vehicle body support portion 326. The elastic body 325 suppresses large rotation of the link plate 322, and the elastic body 327 supports the power generation engine 21 so that it can vibrate.
The link part 33 constitutes a link mechanism 331 by a link plate 332 extending in a direction perpendicular to the crank axis S direction (left-right direction LR) and a bearing support part 333 having a rotation axis parallel to the crank axis S direction. do. The link mechanism 331 is configured such that a link plate 332 is rotatable in a direction perpendicular to the crank axis S direction with respect to the vehicle body frame 10. The link mechanism 331 is supported by the vehicle body frame 10 by an elastic body 335 at an elastic body support portion 334, and is supported by the power generation engine 21 by an elastic body 337 at a vehicle body support portion 336. The elastic body 335 suppresses large rotation of the link plate 332, and the elastic body 337 supports the power generation engine 21 so that it can vibrate.
The link part 34 constitutes a link mechanism 341 by a link plate 342 extending in a direction perpendicular to the crank axis S direction (left-right direction LR) and a bearing support part 343 having a rotation axis parallel to the crank axis S direction. do. The link mechanism 341 is configured such that a link plate 342 is rotatable in a direction perpendicular to the crank axis S direction with respect to the vehicle body frame 10. The link mechanism 341 is supported by the power generation engine 21 by an elastic body 347 at a vehicle body support portion 346 . The elastic body 347 supports the power generation engine 21 so that it can vibrate.

In the straddle-type vehicle 4 of the present embodiment, the link portions include a first pair of link portions 32, a second pair of link portions 33, and a third pair of link portions 34. Ru. The first pair of link parts 32 rotates around the bearing support part 323, and the second pair of link parts 33 rotates around the bearing support part 333, so that the power generation engine 21 is translated in the cylinder direction. It operates in a direction that allows vibration and a direction that allows rotational vibration around the crankshaft. Here, the third pair of link portions 34 suppress rotational vibrations of the power generation engine 21 around the crankshaft. When the power generation engine 21 rotates around the crankshaft, a force acts on a line Z connecting the bearing support part 343 of the link part 34 and the vehicle body support part 346. At this time, rotational vibration of the power generation engine 21 around the crankshaft is suppressed by suppressing the movement of the power generation engine 21 in the direction of the line Z beyond the expansion/contraction range of the elastic body 347. As a result, when viewed in the direction of the crank axis S, the support mechanism 30 is allowed to vibrate due to the residual secondary inertia force generated in the direction of the cylinder axis T of the engine drive power supply unit 20, and to reduce vibration in the rotational direction around the crankshaft. It is possible to have a structure that suppresses this. Therefore, in the series hybrid straddle-type vehicle 4 of the present embodiment, transmission of vibrations generated in the power generation engine 21 to the vehicle body frame 10 can be efficiently suppressed.

(Application example)
The power generation engines of the first to fourth embodiments are, for example, single-cylinder engines, two-cylinder engines other than parallel two-cylinder engines with combustion timing crank angles of 90 degrees and 270 degrees, three-cylinder engines, or cross-cylinder engines. This is a 4-cylinder engine other than a plain parallel 4-cylinder engine. The above-mentioned power generation engine other than the single cylinder engine may be a parallel type engine or a V type engine. When the power generation engines of the first to fourth embodiments are these engines, vibrations caused by the primary inertia force and the primary inertia couple are suppressed by the balancer, and vibrations caused by the secondary inertia force are transmitted to the frame by the support mechanism. By suppressing this, it is possible to suppress transmission of vibration to the frame.

1 to 5 series hybrid straddle type vehicle 10 Body frame 16 Drive motor 17 Drive wheel 20 Engine drive power supply unit 21 Power generation engine 25 Generator 30 Support mechanism 211 Cylinder 212 Two-shaft primary balancer 213 Crankshaft

Claims (5)

A series hybrid saddle type vehicle,
The series hybrid straddle type vehicle is
car body frame,
a drive motor;
a drive wheel rotatably supported by the vehicle body frame and driven by the drive motor;
a power generation engine having one or more cylinders, and a two-axis primary balancer that suppresses vibrations caused by a primary inertial force and a primary inertia couple; a generator that is driven to generate electricity and supply the generated electricity to the drive motor with or without a power storage device, and is capable of outputting the electricity generated by the generator; an engine drive power supply unit configured not to transmit power output from the engine to the drive wheels;
attached to the vehicle body frame to support the engine drive power supply unit in a manner that suppresses rotational vibration around the crankshaft while allowing translational vibration in the cylinder direction due to the residual secondary inertial force; The translational vibration in the cylinder direction is caused by the secondary inertia force remaining in the power generation engine due to the primary inertia force and the primary inertia couple being suppressed by the two-axis primary balancer. The support mechanism is a translational vibration generated in the cylinder axis direction, and the rotational vibration about the crankshaft is a rotational vibration centered on a line parallel to the crankshaft. The series hybrid straddle type vehicle according to claim 1,
The support mechanism is composed of a plurality of pairs of link parts that are a combination of a link mechanism and an elastic body. The series hybrid straddle type vehicle according to claim 2,
When viewed in the vehicle width direction, the generator has at least a portion overlapped with the power generation engine, and is offset in the vehicle width direction from one or more cylinders of the power generation engine,
The link portions constitute a plurality of pairs, each of which is arranged on the left and right, each having a play that allows displacement in a direction intersecting the direction of operation of the link portion, and For each pair, in the vehicle width direction, the deviation of the distance from each of the link parts of the pair to the center of the cylinder is the deviation of the distance from each of the link parts of the pair to the center of gravity of the engine drive power supply unit. is larger than the deviation of the distance from each of the pair of link portions to the center of the series hybrid straddle type vehicle in the vehicle width direction. The series hybrid saddle type vehicle according to claim 2 or 3,
The link portion includes a first pair, a second pair, and a third pair, each of which is arranged on the left and right, and the first pair and the second pair are arranged on the left and right sides. The third pair operates in a direction that allows translational vibration in the cylinder direction due to secondary inertial force, and the third pair suppresses rotational vibration around the crankshaft. A series hybrid saddle type vehicle according to any one of claims 1 to 4,
The power generating engine is a single cylinder engine, a two cylinder engine other than a parallel two cylinder engine with a combustion timing crank angle of 90 degrees or 270 degrees, a three cylinder engine, or a four cylinder engine other than a loss plane type parallel four cylinder engine. It is.

Images