WO2022162904A1

WO2022162904A1 - Series-hybrid type straddled vehicle

Info

Publication number: WO2022162904A1
Application number: PCT/JP2021/003364
Authority: WO
Inventors: 直樹北村; 勉川口
Original assignee: ヤマハ発動機株式会社
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-08-04
Also published as: TW202306804A; TWI815288B; JPWO2022162904A1; JP7387921B2

Abstract

Provided is a series-hybrid type straddled vehicle that makes it possible to efficiently suppress or prevent transmission of the vibration of an engine for electric power generation to a frame while suppressing or preventing an increase in size and complication of the structure. The series-hybrid type straddled vehicle according to the present invention comprises: an engine drive power supply unit which has a biaxial primary balancer for suppressing vibration due to a primary inertia force and a primary inertia couple, an engine for electric power generation, and a generator and which is capable of outputting electric power generated by the generator; and a support mechanism mounted to a vehicle body frame so as to support the engine drive power supply unit in such a manner that suppresses rotational vibration about a crankshaft while allowing cylinder-direction translational vibration due to a residual secondary inertia force. The cylinder-direction translational vibration due to the residual secondary inertia force is translational vibration generated in the cylinder axis direction of the engine for electric power generation as viewed from the crankshaft axis direction by a secondary inertia force remaining in the engine for electric power generation caused by the primary inertia force and the primary inertia couple suppressed by the biaxial primary balancer. The rotational vibration about the crankshaft is rotational vibration about a line parallel to the crankshaft axis.

Description

Series hybrid straddled vehicle

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 mounted on a range extender EV. A power generation engine is provided with a balancer. The link mechanism suspends the engine drive power supply unit. This suppresses transmission of vibrations of the engine drive power supply unit to the frame of the vehicle.

International Publication No. 2012/069201

Various vibrations occur in the power generation engine when the power generation engine is driven. A series hybrid straddle-type vehicle is equipped with an engine drive 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-riding vehicles, there is a strong tendency to demand suppression of vibrations. In addition, the series hybrid straddle-type vehicle has a vehicle characteristic that attitude control is performed by shifting the weight of the occupant, and is used in a wide range of applications such as daily foot use and leisure use such as touring. Therefore, the series hybrid straddle-type vehicle is strongly required to be light and convenient. Therefore, in a series hybrid straddle-type vehicle, it is preferable to be able to efficiently suppress or prevent transmission of vibration of the power generation engine to the frame while suppressing or preventing an increase in size and complication of the structure.
An object of the present invention is to provide a series hybrid saddle-riding vehicle that can efficiently suppress or prevent transmission of vibrations of a power generating engine to the frame while suppressing or preventing an increase in size and complication of the structure. be.

The present inventors studied how to efficiently reduce the vibration generated in the power generation engine of the engine-driven power supply unit. In the engine-driven power supply unit disclosed in Patent Document 1, the power generation engine is provided with a balancer to reduce the vibration of the power generation engine. Further, the engine drive power supply unit is suspended from the frame by a link mechanism to suppress transmission of vibration generated in the power generation engine to the vehicle frame.
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 the vibration due to the primary inertial force described in Patent Document 1, and the link mechanism suppresses the transmission of the vibration such as the primary inertial couple to the frame. However, in addition to the primary inertial force and the primary inertial couple, the vibration generated in the power generation engine also occurs due to the secondary inertial force. Therefore, the engine-driven power supply unit described in Patent Document 1 may generate vibrations due to the secondary inertial force, which may complicate the vibrations of the power generation engine. In some cases, it may not be possible to suppress the transmission of vibration to the frame.

The inventors of the present invention also considered the vibration caused by the secondary inertial force generated in the power generation engine, and studied how to efficiently suppress the transmission of the vibration generated in the engine to the frame. In this study, the present inventors have found that the balancer suppresses the vibration caused by the primary inertial force and the primary inertial couple, and as a result, the vibration caused by the remaining secondary inertial force is suppressed from being transmitted to the frame by the support mechanism. As a result, it is possible to suppress or prevent the increase in size and the complication of the structure, and it is possible to suppress the vibration due to the secondary inertial force.
Specifically, a two-shaft primary balancer for suppressing vibrations due to a primary inertial force and a primary inertial couple is provided in a power generating engine of an engine-driven power supply unit of a straddle-type vehicle. Further, the support mechanism for suspending the engine-driving power supply unit is configured to support the engine-driving power supply unit in such a manner as to suppress rotational vibration around the crankshaft while allowing translational vibration in the cylinder direction due to residual secondary inertia force. Attach to frame.
As a result, the balancer provided in the power generation engine suppresses the primary inertial force and the primary inertia couple generated in the power generation engine. At this time, since vibration due to the secondary inertial force remains in the power generation engine, it is possible to suppress transmission of the vibration due to the residual secondary inertial force to the frame by the support mechanism. Then, the vibration generated from the power generation engine of the engine-driven power supply unit can be reduced, and the support mechanism can also specialize in suppressing the vibration due to 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 complication of the structure while efficiently suppressing transmission of vibration generated in the power generation engine to the frame.

In order to achieve the above objects, according to one aspect of the present invention, a series hybrid straddle-type vehicle has the following configuration.
(1) A series hybrid straddle-type vehicle,
The series hybrid straddle-type vehicle is
body frame and
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 biaxial primary balancer that suppresses vibrations caused by a primary inertial force and a primary inertial couple; a generator that is driven to generate power and supplies the generated power to the drive motor via or without a power storage device, the power generated by the generator can be output, and the power generation an engine drive power supply unit configured not to transmit the power output from the engine to the drive wheels;
It is attached to the vehicle body frame so as 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 inertia force. The translational vibration in the cylinder direction 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, and the power generation engine when viewed in the crank axis direction. and the rotational vibration around the crankshaft is rotational vibration about a line parallel to the crankshaft.

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

　The vibration due to the primary inertial force is the vibration that occurs with the vertical movement of the piston of the power generation engine, and is the vibration that occurs in synchronization with the rotation of the crankshaft of the engine. Vibration due to the primary inertial force mainly occurs in the cylinder axial direction. Vibration due to the primary inertia couple is vibration due to rotational force around the crankshaft of the power generating engine. A dual axis primary balancer has two balancer shafts parallel to the crankshaft that rotate in opposite directions synchronously with the rotation of the crankshaft. The biaxial primary balancer can suppress the vibration 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 occurs in the cylinder axial 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 support mechanism is movable so as to move in the amplitude and vibration direction of the vibration due to the residual secondary inertia force. setting the distance and direction.

In the series hybrid straddle-type vehicle of (1), the generating engine of the engine drive power supply unit is provided with a two-shaft primary balancer that suppresses vibrations caused by the primary inertial force and the primary inertial couple. Further, the support mechanism for suspending the engine-driving power supply unit is configured to support the engine-driving power supply unit in such a manner as to suppress rotational vibration around the crankshaft while allowing translational vibration in the cylinder direction due to residual secondary inertia force. Attach to frame.

As a result, the primary inertial force and the primary inertial couple generated in the power generation engine are suppressed by the two-axis primary balancer provided in the power generation engine. At this time, since vibration due to the secondary inertial force remains in the power generation engine, it is possible to suppress transmission of the vibration due to the residual secondary inertial force to the vehicle body frame by the support mechanism. Then, the vibration generated from the power generation engine of the engine-driven power supply unit can be reduced, and the support mechanism can also specialize in suppressing the vibration due to 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 the vibration of the power generation engine to the frame while suppressing or preventing an increase in size and structural complication.

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 portions that are a combination of a link mechanism and an elastic body.

In the series hybrid straddle-type vehicle of (2), the support mechanism is composed of a plurality of pairs of link portions that are combinations of link mechanisms and elastic bodies. As a result, in the series hybrid straddle-type vehicle of (2), the support mechanism has a structure that allows vibration due to the 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. In addition, the support mechanism can be configured to suppress vibration in the rotational direction about a line that passes through the center of gravity and is parallel to the axis of the crankshaft. Therefore, in the series hybrid straddle-type vehicle of (2), it is possible to efficiently suppress transmission of vibration generated in the power generation engine 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 straddle-type vehicle of (2),
At least a portion of the generator overlaps the power generation engine when viewed in the vehicle width direction, and the power generation engine 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 movement of the link portion, and the link portion For each pair, in the vehicle width direction, the deviation of the distance from each of the paired link portions to the center of the cylinder is the deviation of the distance from each of the paired link portions to the center of gravity of the engine driving power supply unit. and greater than the deviation of the distance from each of the paired 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 of (3), the deviation of the distance from each of the paired link portions to the center of the cylinder in the vehicle width direction is determined by the engine drive power supply from each of the paired link portions. Greater than the deviation of the distance to the center of gravity of the unit. Further, in the series hybrid saddle type vehicle of (3), the deviation of the distance from each of the paired link portions to the center of the cylinder in the vehicle width direction is equal to It is larger than the deviation of the distance to the center of the vehicle in the vehicle width direction.
Therefore, in the series hybrid straddle-type vehicle of (3), the engine-driven power supply unit is provided with an engine-driven power supply unit so that the series hybrid straddle-type vehicle rotates in the horizontal direction about the center of gravity of the engine-driven power supply unit and the center of the vehicle. Inertial force acts easily. However, in the series hybrid saddle-ride type vehicle of (3), the inertial force that causes the vehicle body of the series hybrid saddle-ride type vehicle to rotate in the horizontal direction is transmitted from the power generation engine to the frame by the link with play. can be suppressed.

According to one aspect of the present invention, a series hybrid straddle-type vehicle can employ the following configuration.
(4) The series hybrid straddle-type vehicle of (2) or (3),
The link portions are composed of a first pair, a second pair, and a third pair, each of which is a pair arranged on the left and right, and the first pair and the second pair are the remaining It operates in a direction to allow translational vibration in the cylinder direction due to secondary inertia force, and the third pair suppresses rotational vibration about the crankshaft.

In the series hybrid saddle-riding vehicle of (4), the link portions are 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 inertial force. The third pair suppresses rotational vibrations about the crankshaft. As a result, when viewed in the direction of the crankshaft, the support mechanism has a structure that allows vibration due to the remaining secondary inertia force generated in the cylinder axial direction of the engine drive power supply unit, and suppresses vibration in the rotation direction around the crankshaft. can do. Therefore, in the series hybrid straddle-type vehicle of (4), it is possible to efficiently suppress transmission of vibration generated in the power generation engine 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 straddle-type vehicle according to any one of (1) to (4),
The power generating 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. is.

In a series hybrid straddle-type vehicle, the balancer suppresses the vibration caused by the primary inertial force and the primary inertial couple, and the support mechanism suppresses the transmission of the vibration caused by the secondary inertial force to the frame. Even in a power generation engine of a series hybrid straddle-type vehicle, transmission of vibration to the frame can be suppressed.

The terminology used in this specification is for the purpose of defining specific examples only and is not intended to limit the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed constructs. As used herein, the use of the terms "including," "comprising," or "having," and variations thereof, refers to the described features, steps, operations, While identifying the presence of elements, components and/or their equivalents, may include one or more of steps, actions, elements, components and/or groups thereof. As used herein, the terms "attached", "connected", "coupled" and/or their equivalents are used broadly to refer to direct and indirect attachment, connection and includes both bindings. 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 are to be construed to have a meaning consistent with their meaning in the context of the relevant art and this disclosure, and are not expressly defined herein. not be interpreted in an idealized or overly formal sense unless explicitly stated. In describing the present invention, it is understood that numerous techniques and processes are disclosed. Each of these has individual benefits, and each can also be used with one or more, or possibly all, of the other disclosed techniques. Thus, for the sake 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.

This specification describes a new engine-driven power supply unit. 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 obvious to those skilled in the art that the present invention may be practiced without these specific details. The present disclosure should be considered exemplary of the invention and is not intended to limit the invention to the specific embodiments illustrated by the following drawings or description.

Regarding the series hybrid straddled vehicle, a straddled vehicle refers to a vehicle in which the driver sits astride the saddle. Straddle-type vehicles include, for example, moped-type, off-road-type, and on-road-type motorcycles. Moreover, the straddle-type vehicle is not limited to a motorcycle, and may be, for example, a three-wheeled motor vehicle, an ATV (All-Terrain Vehicle), or the like. A motor tricycle may have two front wheels and one rear wheel, or may have one front wheel and two rear wheels. The driving wheels of the straddle-type vehicle may be the rear wheels or the front wheels. Also, the drive wheels of the straddle-type vehicle may be both the rear wheels and the front wheels. Moreover, it is preferable that the straddle-type vehicle is configured to be able to turn in a lean posture. A straddle-type vehicle that is configured to turn in a lean posture is configured to turn in a posture that is inclined toward the center of a curve. As a result, the straddle-type vehicle configured to be able to turn in a lean posture resists the centrifugal force applied to the vehicle during turning.

The body frame forms the skeleton of the saddle-ride type vehicle and supports mounted parts of the saddle-ride type vehicle such as the power storage device, the engine drive power supply unit, and the drive motor. A 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, single cradle type, double cradle type, diamond type, and monocoque type. The vehicle body frame is composed of a front fork, a frame body, and a swing arm, and receives loads from the front and rear wheels.

The power generation engine is, for example, an engine that has a high load region and a low load region. The power generation engine is, for example, a 4-stroke engine. A four-stroke engine has a high load region and a low load region during the 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, which has a high load region and a low load region, the rotational fluctuation at low rotational speeds is greater than 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 range refers to a range other than the high load range in one combustion cycle. Considering the rotation angle of the crankshaft as a reference, the low load range of the engine is wider than, for example, the high load range. The compression stroke has a high load region and an overlap.
For example, in an engine having a high load region and a low load region, the starting position of the crankshaft is set so that the rotational force of the crankshaft at the time of starting the engine obtains a run-up interval for overcoming 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, for example, a motor that does not use permanent magnets. A permanent magnet generator is, for example, a brushless motor. A brushless motor is a motor that does not have a commutator. A generator is a motor generator that is driven by a power generation engine to generate power. The generator may function as a starter motor to start the generator engine. A generator is not restricted to this. The permanent magnet generator may be, for example, a brushed DC motor. The brushless motor may be, for example, an outer rotor type or an inner rotor type. Also, the brushless motor may be of the axial gap type instead of the radial gap type. The generator may also be of a type that does not have permanent magnets in the rotor, for example.

A 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 damper rubber, for example. The elastic member is a member having elasticity. The elastic member includes, for example, a cushioning member, a 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 on the vehicle body frame. The support mechanism supports the power generating engine on the vehicle body frame while allowing the power generating engine to vibrate. A connection component that supports the power generation engine on the vehicle body frame while allowing 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 for supporting 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/outer sleeve bush, a currant bush, or a damper rubber. The elastic member is a member having elasticity. The elastic member includes, for example, a cushioning member, a damping member, a vibration isolating member, and the like. A link mechanism is, for example, a combination of a link plate and a rotation support. The rotation support is, for example, a bearing support made up of bearings. Instead of the bearing, the rotation support may be supported by an elastic body configured to allow the link mechanism to rotate, for example.

According to the present invention, an object of the present invention is to provide a series hybrid straddle-type vehicle capable of efficiently suppressing transmission of vibration generated in the power generation engine to the frame.

(a) is a left side view showing the configuration of the series hybrid straddle-type vehicle according to the first embodiment of the present invention, and (b) is an engine drive power supply of the straddle-type vehicle 1 of (a). It is a left view which expands and shows the structure of a 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; (b) is a series hybrid type of (a); FIG. 4C is an enlarged rear view showing an engine drive power supply unit of the straddle-type vehicle, and 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; (b) is a series hybrid type of (a); FIG. 4 is an enlarged top view showing an 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; (b) to (d) are (a); 2 is an enlarged left side view of a link portion of a support mechanism of an engine drive power supply unit of a series hybrid saddle type vehicle; FIG.

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 straddle-type vehicle 1 according to a first embodiment of the present invention. Note that, hereinafter, the series hybrid saddle-ride type vehicle is also simply referred to as a saddle-ride type vehicle. FIG. 1(a) is a left side view showing the configuration of a straddle-type vehicle 1 according to the first embodiment of the invention, and FIG. 1(b) is a front view of the straddle-type vehicle 1 of FIG. 3 is a left side view showing an enlarged configuration of the engine drive power supply unit 20. FIG.
In this specification and drawings, F indicates the front direction of the straddle-type vehicle 1 . B indicates the rearward direction of the straddle-type vehicle 1 . FB indicates the front-rear direction of the straddle-type vehicle 1 . U indicates the upward direction in the straddle-type vehicle 1 . D indicates the downward direction in the straddle-type vehicle 1 . UD indicates the vertical direction of the straddle-type vehicle 1 . L indicates the left direction in the straddle-type vehicle 1 . R indicates the right direction in the straddle-type vehicle 1 . LR indicates the left-right direction of the straddle-type vehicle 1 . LR is also the width direction of the straddle-type vehicle 1 . That is, the vehicle width direction LR of the straddle-type vehicle 1 includes both the rightward direction R and the leftward direction L of the straddle-type vehicle 1 .

A straddle-type vehicle 1 shown in FIG.
The engine drive power supply unit 20 has a power generation engine 21 and a generator 25 . The power generation engine 21 has one or more cylinders 211 and a two-axis primary balancer 212 . The biaxial primary balancer 212 suppresses vibration due to 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 power, and supplies the generated power to the drive motor 16 with or without the power storage device 15 . The engine drive power supply unit 20 is configured to be capable of outputting power generated by the generator 25 and not to transmit power output from the power generation engine 21 to the driving wheels 17 .
The support mechanism 30 is attached to the vehicle body frame 10 so as to support the engine driving power supply unit 20 in a manner that allows translational vibration in the cylinder direction due to residual secondary inertial force and suppresses rotational vibration around the crankshaft 213 . The translational vibration in the cylinder direction due to the residual secondary inertial force is caused in the direction of the crank axis S by the secondary inertial force remaining in the power generation engine 21 due to the suppression of the primary inertial force and the primary inertial couple by the two-axis primary balancer 212. As you can see, it is a translational vibration generated in the direction of the cylinder axis T of the power generation engine 21 . The rotational vibration around the crankshaft 213 is rotational vibration about a line parallel to the crank axis S. As shown in FIG.

The vibration X1 due to the primary inertial force shown in FIG. 1(b) is a vibration that occurs with the reciprocating motion 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 vibration due to the rotational force around the crankshaft 213 of the power generation engine 21 . The biaxial primary balancer 212 is a balancer having two balancer shafts 213-1 and 213-2 parallel to the crankshaft 213 that rotate in opposite directions in synchronism with the rotation of the crankshaft 213 to generate electricity by primary inertial force. Vibration X1 of the power generation engine 21 and vibration X2 of the power generation engine 21 due to 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 occurs in the cylinder axis T direction. The vibration Y1 due to the secondary inertia force has a smaller amplitude than the vibration X1 due to the primary inertia force. Being configured to suppress rotational vibration around the crankshaft 213 while allowing translational vibration in the cylinder direction due to the residual secondary inertia 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 inertia force. 30 movable distances and directions.

In the straddle-type vehicle 1 of the present embodiment, the generating engine 21 of the engine drive power supply unit 20 is provided with a two-shaft primary balancer 212 that suppresses vibrations caused by the primary inertial force and the primary inertial couple. In addition, the support mechanism 30 that suspends the engine-driving power supply unit 20 supports the engine-driving power supply unit 20 in such a manner as to suppress rotational vibration around the crankshaft 213 while allowing translational vibration in the cylinder direction due to residual secondary inertial force. It is attached to the body frame 10 so that it does.

The engine driving power supply unit 20 of this embodiment suppresses the primary inertial force and the primary inertial couple generated in the power generation engine 21 by the biaxial primary balancer 212 provided in the power generation engine 21 . At this time, since the vibration due to the secondary inertia force remains in the power generation engine, it is possible to suppress the transmission of the vibration due to the residual secondary inertia force to the vehicle body frame 10 by the support mechanism 30 . Then, the vibration generated from the power generation engine 21 of the engine-driven power supply unit 20 can be reduced, and the support mechanism can also specialize in suppressing the vibration due to the remaining secondary inertial force. As a result, in the series hybrid straddle-type vehicle 1, it is possible to efficiently suppress or prevent transmission of vibration of the power generation engine 21 to the vehicle body frame 10 while suppressing or preventing an increase in size and 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 an engine drive power supply unit 20 of a straddle-type vehicle 2 according to a second embodiment of the present invention, and FIG. 2(b) is a left side view of FIG. ) is an enlarged rear view of the engine drive power supply unit 20 of the straddle-type vehicle 2 shown in FIG. It is a left side view showing. In this embodiment, the straddle-type vehicle 2 is configured as follows. In this embodiment, the same reference numerals as in the straddle-type vehicle 1 shown in FIG. 1 are given to the same configurations as in the first embodiment.

As shown in FIG. 2(b), the support mechanisms 30 form a plurality of pairs. More specifically, the support mechanisms 30 are provided on the left and right sides of the power generation engine 21 at the same positions when viewed in the left-right direction, and are regarded as one pair (see FIGS. 2(a) and 2(b)). In this embodiment, these pairs are provided at a plurality of locations on the power generation engine 21 . Further, as shown in FIG. 2(c), the support mechanism 30 is composed of a link portion 31 which 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 direction of the crank axis S (lateral direction LR) and a bearing support portion 313 having a rotation axis parallel to the direction of the crank axis S. A mechanism 311 is constructed. The link mechanism 311 is configured such that the link plate 312 can rotate 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 means of elastic bodies 314 and supported by the power generation engine 21 by means of elastic bodies 315 . In the link mechanism 311 , the elastic body 314 suppresses the link plate 312 from rotating greatly, and the elastic body 315 supports the power generation engine 21 so as to 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 vibrates due to the secondary inertia force generated in the direction of the cylinder axis T of the engine drive power supply unit 20. can be structured to allow Further, the support mechanism 30 can be configured to suppress rotational vibration around the crankshaft 213 . Therefore, in the straddle-type vehicle 2 of the present embodiment, it is possible to efficiently suppress transmission of vibration generated in the power generation engine 21 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 an engine drive power supply unit 20 of a straddle-type vehicle 3 according to a third embodiment of the present invention, and FIG. 3(b) is a left side view of FIG. ) is an enlarged top view showing an engine drive power supply unit 20 of the saddle type vehicle 3. FIG. In this embodiment, the straddle-type vehicle 3 is configured as follows. In this embodiment, the same reference numerals as in the straddle-type vehicle 1 shown in FIG. 1 are given to the same configurations as in the first embodiment.

As shown in FIG. 3(a), the generator 25 of the straddle-type vehicle 3 has at least a portion that overlaps the power generation engine 21 when viewed in the vehicle width direction LR. As shown in FIG. 3(b), the generator 25 is displaced from one or more cylinders 211 of the generator 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 portions 31 has a play q1 that allows displacement in a direction Q that intersects the direction P of movement of the link portion 31 . For each pair formed by the link portions 31, the deviation of the distance (q21, q22) from each of the paired link portions 31 to the center (cylinder axis T) of the cylinder 211 in the vehicle width direction LR is 31 to the center of gravity G of the engine drive power supply unit 20, and the center C in the vehicle width direction LR of the straddle-type vehicle 1 from each of the paired link portions 31. greater than the deviation of the distance (q41, q42) to

According to the straddle-type vehicle 3 of the present embodiment, the deviation q2 of the distance from each of the paired link portions 31 to the center of the cylinder 211 in the vehicle width direction LR is greater than the distance from each of the paired link portions 31 to the engine. 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 paired link portions 31 to the center of the cylinder 211 in the vehicle width direction LR is the same as that of the straddle-type vehicle 3. 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 the present 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 link portion 31, which is a link with play, generates an inertial force H from the power generation engine 21 that causes the vehicle body of the series hybrid straddle-type vehicle 3 to rotate in the horizontal direction. Transmission to the vehicle body frame 10 can be suppressed.

[Fourth embodiment]
A fourth embodiment of the present invention will be described. FIG. 4(a) is an enlarged left side view showing an engine drive power supply unit 20 of a straddle-type vehicle 4 according to a fourth embodiment of the present invention, and FIGS. Fig. 5 is a left side view showing an enlarged view of link portions 32L to 34L of the support mechanism 30 of the engine drive power supply unit 20 of the straddle-type vehicle 4 of Fig. 4(a); In this embodiment, the straddle-type vehicle 4 is configured as follows. In this embodiment, the same reference numerals as in the straddle-type vehicle 1 shown in FIG. 1 are given to the same configurations as in the first embodiment.

The link portions of the straddle-type vehicle 4 shown in FIG. 4(a) include a first pair of link portions 32L and 32R 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 portions 32L and 32R and the second pair of link portions 33L and 33R operate in a direction to allow translational vibration (vibration Y1) in the cylinder direction due to residual secondary inertia force, The pair of link portions 34L and 34R suppress rotational vibration (vibration X2) around the crankshaft 213. As shown in FIG. 4A to 4D, only the link portions 32L to 34L, which are the link portions in the left direction L in the left-right direction LR of the straddle-type vehicle 4, are shown. The link portions 32R to 34R, which are the 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 direction of the crank axis S (lateral direction LR) and a bearing support portion 323 having a rotation axis parallel to the direction of the crank axis S. A mechanism 321 is constructed. The link mechanism 321 is configured such that the link plate 322 can rotate 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 at the elastic body support portion 324 by the elastic body 325 , and is supported by the power generation engine 21 at the vehicle body support portion 326 by the elastic body 327 . The elastic body 325 suppresses the link plate 322 from rotating greatly, and the elastic body 327 supports the power generation engine 21 so as to vibrate.
The link portion 33 includes a link plate 332 extending in a direction perpendicular to the direction of the crank axis S (lateral direction LR) and a bearing support portion 333 having a rotation shaft parallel to the direction of the crank axis S to form a link mechanism 331. do. The link mechanism 331 is configured so that the link plate 332 can rotate 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 at the elastic body support portion 334 by the elastic body 335 , and is supported by the power generation engine 21 at the vehicle body support portion 336 by the elastic body 337 . The elastic body 335 suppresses the link plate 332 from rotating greatly, and the elastic body 337 supports the power generating engine 21 so as to vibrate.
The link portion 34 comprises a link mechanism 341 with a link plate 342 extending in a direction perpendicular to the crank axis S direction (lateral direction LR) and a bearing support portion 343 having a rotation shaft parallel to the crank axis S direction. do. The link mechanism 341 is configured so that the link plate 342 can rotate 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 means of elastic bodies 347 at the vehicle body support portion 346 . The elastic body 347 supports the power generation engine 21 so as to vibrate.

In the straddle-type vehicle 4 of the present embodiment, the link portions are composed of a first pair of link portions 32, a second pair of link portions 33, and a third pair of link portions 34. be. The first pair of link portions 32 rotate around the bearing support portion 323, and the second pair of link portions 33 rotate around the bearing support portion 333, so that the power generation engine 21 is translated in the cylinder direction. It operates in a direction that allows vibration and in a direction that allows rotational vibration around the crankshaft. Here, the link portion 34, which is the third pair, suppresses rotational vibration of the power generating engine 21 around the crankshaft. When the power generation engine 21 rotates around the crankshaft, a force acts on the line Z connecting the bearing support portion 343 of the link portion 34 and the vehicle body support portion 346 . At this time, by suppressing the movement of the power generation engine 21 in the direction of the line Z beyond the expansion and contraction range of the elastic body 347, the rotational vibration of the power generation engine 21 around the crankshaft is suppressed. 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 vibration in the rotational direction around the crank shaft is allowed. It can be structured to suppress. Therefore, in the series hybrid straddle-type vehicle 4 of the present embodiment, it is possible to efficiently suppress transmission of vibration generated in the power generation engine 21 to the vehicle body frame 10 .

(Application example)
The power generation engine of the first to fourth embodiments is, for example, 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 cross It is a four-cylinder engine other than a plane type parallel four-cylinder engine. The power generation engine described above, other than the single-cylinder engine, may be a parallel engine or a V-type engine. When the generator engines of the first to fourth embodiments are these engines, the balancer suppresses the vibration due to the primary inertial force and the primary inertial couple, and the support mechanism transmits the vibration due to the secondary inertial force to the frame. It is possible to suppress the transmission of vibration to the frame by suppressing the vibration.

1 to 5 series hybrid saddle 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 biaxial primary balancer 213 crankshaft

Claims

A series hybrid straddle-type vehicle,
The series hybrid straddle-type vehicle is
body frame and
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 biaxial primary balancer that suppresses vibrations caused by a primary inertial force and a primary inertial couple; a generator that is driven to generate power and supplies the generated power to the drive motor via or without a power storage device, the power generated by the generator can be output, and the power generation an engine drive power supply unit configured not to transmit the power output from the engine to the drive wheels;
It is attached to the vehicle body frame so as 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 inertia force. The translational vibration in the cylinder direction 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, and the power generation engine when viewed in the crank axis direction. and the rotational vibration around the crankshaft is rotational vibration about a line parallel to the crankshaft.
A series hybrid straddle-type vehicle according to claim 1,
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.
A series hybrid straddle-type vehicle according to claim 2,
At least a portion of the generator overlaps the power generation engine when viewed in the vehicle width direction, and the power generation engine 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 movement of the link portion, and the link portion For each pair, in the vehicle width direction, the deviation of the distance from each of the paired link portions to the center of the cylinder is the deviation of the distance from each of the paired link portions to the center of gravity of the engine driving power supply unit. and greater than the deviation of the distance from each of the paired link portions to the center of the series hybrid straddle-type vehicle in the vehicle width direction.
A series hybrid straddle-type vehicle according to claim 2 or 3,
The link portions are composed of a first pair, a second pair, and a third pair, each of which is a pair arranged on the left and right, and the first pair and the second pair are the remaining It operates in a direction to allow translational vibration in the cylinder direction due to secondary inertia force, and the third pair suppresses rotational vibration about the crankshaft.
A series hybrid straddle-type vehicle according to any one of claims 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 loss plane type parallel four-cylinder engine. is.