JP4041467B2 - Hybrid vehicle - Google Patents

Description

  The present invention relates to a hybrid vehicle in which a generator is driven using an engine, and a motor is driven by electric power generated by the generator to drive wheels.

  Conventionally, a self-propelled vehicle is generally one that drives wheels with an engine, as seen in motorcycles, automobiles, and the like. In recent years, environmental issues have been emphasized, and it is desired to reduce environmental pollutants discharged from engine-driven vehicles as much as possible. For this reason, a vehicle in which a drive motor for driving wheels is mounted together with the engine and the drive wheels are driven by the drive motor, that is, a so-called hybrid vehicle has been put into practical use.

  As a hybrid vehicle, for example, there is a parallel hybrid vehicle that drives drive wheels depending on the case of both an engine and a motor mounted on the vehicle. In addition to the parallel hybrid type, there is a series hybrid type vehicle in which a generator is driven by an engine mounted on the vehicle, and a drive motor that drives a drive wheel is driven using only power generated by the generator. is there.

  As a series hybrid type vehicle, for example, there is a vehicle disclosed in Patent Document 1.

  The vehicle disclosed in Patent Document 1 includes a drive motor that drives a drive wheel, a battery that supplies power to the drive motor, and an engine-driven generator that charges the battery while traveling. A supplementary role of a drive motor that drives the motor (see FIG. 12 of Patent Document 1).

  In this vehicle, an engine and a generator are arranged between the seat pillar and the rear fender so that the respective rotation shafts are arranged in the vehicle width direction and parallel to each other. Further, a transmission mechanism provided on one side surface portion is configured to transmit the rotational driving force of the engine to the generator.

  However, in the electric two-wheeled vehicle that is the hybrid vehicle disclosed in Patent Document 1, the heavy engine and the generator are stacked, so that the center of gravity becomes high, and the operability cannot be denied. Therefore, when applied to a vehicle capable of traveling at a higher speed than a bicycle, a structure that further lowers the center of gravity is desired.

For example, when applied to a small vehicle such as a scooter having a footboard on which a driver can place a foot while traveling, for example, as in Patent Document 2, each power such as an engine is provided in front of the rear wheel and below the seat. The structure which arrange | positioned the structural member and made the gravity center lower than the structure of patent document 1, and was aimed at the improvement of operativity is considered.
JP 2001-106159 A JP 2000-313389 A

  However, when the hybrid structure of Patent Document 1 is applied to Patent Document 2 and the arrangement position of a power component such as an engine is lowered to lower the center of gravity of the entire vehicle, there are the following problems. That is, in a small vehicle such as a scooter having a footboard as in Patent Document 2, a rear wheel is arranged behind the lower part of the seat, so when a power component is arranged in the lower part of the seat, it is arranged in the rear of the vehicle. The area is limited.

  In general, in a small vehicle, the length in the vehicle width direction of the lower part of the seat is desired to be as short as possible in consideration of the ability of the driver to get on the road surface when seated on the seat. Therefore, when a generator is further arranged in the lower part of the seat of the small vehicle having the footboard, it is conceivable to arrange the generator so as to protrude forward of the vehicle in the lower part of the seat.

  Thus, when the power component is arranged so as to protrude forward of the vehicle in the lower part of the seat, the area on the rear end side of the footboard becomes narrow. Therefore, when the driver sitting on the seat puts his / her foot on the footboard, he / she has to put it on the lower portion of the seat so as to avoid the forward projecting portion, and it is difficult to secure the footboard on the footboard.

  Further, in a hybrid type vehicle, the difference in noise level is large between when only the electric vehicle is driven, that is, when the vehicle is driven by the drive motor and when the engine is driven while being driven. For this reason, in a hybrid vehicle, it is desirable to further reduce noise due to engine driving.

  The present invention has been made in view of the above points, and in a hybrid vehicle having a footboard, noise can be reduced by driving the engine, and the center of gravity is low, the operability is excellent, and the road surface is obtained. The purpose of this is to easily ensure the ability to attach to the footboard as well as the ability to attach to the footboard.

  The hybrid vehicle of the present invention includes an engine disposed in front of a footboard, a cooling fan that blows cooling air toward the engine, an exhaust pipe that guides exhaust gas discharged from the engine to an expansion chamber of a muffler, And a cover member that covers the engine, the cooling fan, and the exhaust pipe, and that guides the cooling air sent to the engine side by the cooling fan to the exhaust pipe side.

  According to this configuration, the engine, the cooling fan, and the exhaust pipe disposed in front of the hood board are covered with the cover member that guides the cooling air sent to the engine side by the cooling fan to the exhaust pipe side. Engine, cooling fan, and exhaust pipe noise, particularly engine noise, can be reduced. Therefore, in the hybrid vehicle, the difference in noise between when traveling with only the motor and when traveling with the engine started can be reduced, and the driver can perform a cheerful driving.

  In the cover member, the cooling air sent from the cooling fan passes through the engine to be cooled, and is then guided to the exhaust pipe to cool the exhaust pipe. Therefore, the engine and the exhaust pipe can be effectively cooled in ascending order of temperature.

  Furthermore, since the engine is disposed in front of the hood board and the engine, the cooling fan, and the exhaust pipe are covered with a cover member, the center of gravity can be lowered and the operability can be improved unlike the conventional case. be able to. In addition, since it is not necessary to dispose a power component such as an engine in the lower part of the seat behind the footboard, the lower part of the seat does not swell in the vehicle width direction, and it is possible to secure the footing on the road surface. In addition to this, it is possible to widen the foot part of the driver of the foot board, and to improve the ability to attach to the foot board.

  The hybrid vehicle of the present invention employs a configuration in which the cooling fan is driven by rotation of a crankshaft of the engine in the above configuration.

  According to this configuration, since the cooling fan is driven by the rotation of the crankshaft of the engine, there is no need to prepare a separate drive source for driving the cooling fan, and the cooling fan is supplied to the engine side by an efficient fan. Can send. Moreover, compared with the case where an electric fan is used, there is no power consumption and a fuel consumption deterioration can be prevented.

  In the above configuration, the hybrid vehicle of the present invention has a generator that generates electric power for driving the driving wheels driven by the engine, a control circuit, and a battery, in the footboard. The generator, the control circuit, and the battery are arranged on the intake side of the cooling fan and are cooled by the rotation of the cooling fan.

  According to this configuration, since the generator, the control circuit, and the battery are arranged on the intake side of the cooling fan in the footboard, the cooling fan rotates by driving the engine, and the air (outside air) sucked by the cooling fan Control circuits, generators and batteries can be cooled.

  In the hybrid vehicle of the present invention, in the above configuration, the cooling fan is disposed between the engine and the generator, and a rotor shaft of the generator is formed integrally with a crankshaft of the engine. The structure which is made is taken.

  According to this configuration, since the cooling fan is driven by the rotation of the crankshaft of the engine, it is not necessary to prepare a new drive source for driving the cooling fan, and the configuration can be made compact.

  The hybrid vehicle of the present invention employs a configuration in which the crankshaft and the rotor shaft are arranged in the front-rear direction of the vehicle in the above configuration.

  According to this configuration, since the crankshaft and the rotor shaft are arranged in the front-rear direction of the vehicle, the crankshaft and the rotor shaft do not protrude in the vehicle width direction, and the vehicle width can be reduced.

  In the above configuration, the hybrid vehicle of the present invention employs a configuration in which the cooling fan is disposed on the vehicle rear side from the engine and blows forward from the rear in the vehicle traveling direction within the cover member.

  According to this configuration, since the cooling fan blows the cooling air from the rear in the vehicle traveling direction to the engine in the cover member, the engine can be reliably cooled regardless of the traveling state of the vehicle.

  The hybrid vehicle of the present invention includes a hybrid unit in which the cover member, the engine, the generator, and the cooling fan are integrally formed in the above configuration, and the hybrid unit is located in front of the footboard. A structure that is swingably mounted in the vehicle longitudinal direction is adopted.

  According to this configuration, since the hybrid unit is attached to the front of the footboard so as to be swingable in the vehicle front-rear direction, engine vibration (such as rolling or rotating) caused by engine driving such as rotation of the crankshaft and vertical movement of the piston is performed. Pitching) can be prevented from being transmitted directly to the vehicle body.

  As described above, according to the present invention, it is possible to reduce noise even when the engine is driven, and further, the center of gravity is low, the operability is excellent, and the foot and the foot board are easy to reach. Can be easily secured.

  The gist of the present invention is a hybrid vehicle that has a footboard, drives a generator by an engine, and drives a drive motor that drives a drive wheel using the power generated by the generator. It is possible to improve the operability and the ability to reach the road surface and the footboard.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing a configuration of a hybrid vehicle according to an embodiment of the present invention. Note that the right side and the left side described below refer to the right side and the left side of the vehicle with the traveling direction of the vehicle in front. Further, the rear means the opposite side in the traveling direction in the vehicle. Further, the direction indicated by the black arrow in FIG. 1 indicates the flow of air as cooling air.

  A hybrid vehicle 100 shown in FIG. 1 includes a hybrid unit (hereinafter, referred to as an engine 130) that generates power to a drive motor 190 that drives drive wheels (rear wheels 105) and an engine 130 that drives the generator 120. 140 (referred to as “engine power generation unit”).

  The hybrid vehicle 100 is a self-propelled electric two-wheeled vehicle having an underbone type and a footboard 111. Here, hybrid vehicle 100 means a vehicle in which at least part of the power transmitted to the drive wheels is generated by an electric motor. Therefore, it may be a tricycle. In this hybrid vehicle 100, an engine power generation unit 140 is disposed in front of the foot board 111.

  The hybrid vehicle 100 includes a front fork 103 provided with a handle 101 at an upper portion and a front wheel 102 supported at a lower portion.

  The front fork 103 is rotatably supported by the front end portion of the main body 110 at the center thereof.

  The main body 110 includes a down frame part 112, a foot board 111, a seat pillar part 113, and a rear arm part 114. Here, each of the down frame portion 112, the footboard 111, the seat pillar portion 113, and the rear arm portion 114 has a hollow portion.

  The down frame portion 112 supports the front fork 103 rotatably at the upper end, descends rearward from the front fork 103, and extends along the front fork 103 that is a front wheel steering shaft. The upper end portion of the down frame portion 112 constitutes the front end portion of the main body 110 that supports the front fork 103.

  Further, a cooling air suction port 112 a that communicates the inside and the outside of the down frame portion 112 is formed on the front surface of the upper end portion of the down frame portion 112.

  A front end portion of a horizontally disposed foot board 111 is integrally connected to a lower end portion of the down frame portion 112. The integrated down frame portion 112 and footboard 111 are substantially L-shaped when viewed from the side, and are disposed between the front wheel 102 and the rear wheel 105.

  A lower end portion of the seat pillar portion 113 extending upward is joined to the rear end portion 111x of the foot board 111, and a seat 115 is provided at the upper end portion of the seat pillar portion 113.

  The foot board 111 is a footrest space for a driver sitting on the seat 115 and has a flat plate shape.

  2 is a cross-sectional view taken along the line II-II in FIG. Note that FIG. 2 is a view in which only the foot board 111 portion and the rear wheel 105 are broken, and the other components are not broken for convenience. Further, the direction indicated by the black arrow in FIG. 2 indicates the flow of air as cooling air.

  As shown in FIGS. 1 and 2, a pair of left and right rear arm portions 114 extending rearward are joined to the rear end portion 111x of the foot board 111 and the lower end portion of the seat pillar portion 113 (shown in phantom lines in FIG. 2). A rear wheel 105 is pivotally supported on the rear arm 114 so as to be rotatable. Note that the distance between the outer surfaces of the pair of rear arm portions 114 is shorter than the width of the foot board 111.

  As shown in FIGS. 1 and 2, the fuel tank 160, the engine 130, the cooling fan 150, the generator 120, the battery 170, the control device 180, and the drive motor 190 are contained in the main body 110 configured as described above. Has been placed.

  3 is a cross-sectional view taken along line III-III in FIG. FIG. 3 shows a state where only the front side portion of the down frame portion 112 is removed. Moreover, the direction shown by the black arrow in FIG. 3 shows the flow of the air used as cooling air.

  The fuel tank 160 stores the fuel of the engine 130 of the engine power generation unit 140. As shown in FIGS. 1 and 3, the fuel tank 160 is provided in the down frame portion 112 above the engine 130 and along the front fork 103. The fuel tank 160 is disposed in the down frame portion 112 at a position that forms a communication path between the cooling air inlet 112 a and the lower end portion of the down frame portion 112.

  In addition, the fuel tank 160 is disposed vertically in a portion of the down frame portion 112 excluding a communication portion between the cooling air suction port 112a and the lower end portion. With this configuration, the fuel tank 160 can effectively use the inside of the down frame portion 112 and can store fuel having a capacity substantially the same as the size of the hollow portion of the down frame portion 112. An engine power generation unit 140 is disposed below the fuel tank 160.

  The engine power generation unit 140 is disposed in the lower front portion of the main body 110. Specifically, the engine power generation unit 140 is disposed inside the joint portion between the down frame portion 112 and the footboard 111, and the engine 130, the cooling fan 150, and the generator 120 are sequentially disposed from the front side of the main body 110. ing.

  FIG. 4 is a left side view of the engine power generation unit included in the hybrid vehicle according to the embodiment of the present invention. FIG. 5 is a diagram of the engine power generation unit according to the embodiment of the present invention with the cover member removed. It is a top view. FIG. 6 is a front view of the engine power generation unit according to the embodiment of the present invention with the front surface portion of the cover member removed. In FIG. 4, the down frame portion 112, the footboard 111, and the cooling cover member 155 are appropriately broken, and the main configuration of the engine power generation unit 140 is indicated by a solid line. As a break position of the down frame portion 112 and the foot board 111 portion, it is broken at a substantially vertical plane passing through the axis of the engine 130. Moreover, the direction shown by the black arrow in FIG. 4 shows the flow of the air used as cooling air. In FIG. 6, the main part configuration is indicated by a solid line.

  As shown in FIGS. 4 to 6, the engine power generation unit 140 includes a power generator 120, an engine 130, a cooling fan 150, and a cooling cover member 155 that covers the engine 130 and the cooling fan 150.

  The engine 130 is an air-cooled four-cycle engine, and a cylinder 133 is provided on a crankcase 132 having a crankshaft 131 with its shaft arranged in the vertical direction. A fuel tank 160 is disposed above the engine 130.

  Further, as shown in FIGS. 4 to 6, an intake system and an exhaust system are arranged on the left and right sides of the engine 130, respectively.

  An intake system (mainly see FIGS. 5 and 6) arranged on the right side (left side as viewed from the front of the vehicle) of the engine 130 includes an intake pipe 134a, a carburetor 134b, and an air cleaner 134c. The intake pipe 134a is connected to the right side of the cylinder 133 and extends rearward.

  A carburetor 134b is interposed in the middle of the intake pipe 134a, and an air cleaner 134c is connected behind the carburetor 134b. As shown in FIG. 6, the carburetor 134 b is connected to a fuel tank 160 disposed above the engine 130 via a fuel supply pipe 161.

  The carburetor 134b supplies fuel to the cylinder 133 while adjusting with the electromagnetic valve 134e provided in the carburetor 134b. On the right side surface portion of the foot board 111 facing the carburetor 134b, a cooling air suction port 111a is formed to open to the side (here, the vehicle right side) (see FIG. 3). In addition, a cooling air inlet 111c is formed in the lower surface portion of the foot board 111 facing the lower surface of the carburetor 134b so as to open downward.

  The air cleaner 134c is connected to an intake intake pipe 134d that extends rearward and downward. The intake intake pipe 134d takes in the outside air staying in the foot board 111 or taken in the foot board 111.

  The exhaust system disposed on the left side of the engine 130 (the right side when viewed from the front of the vehicle) includes an exhaust pipe 135a, a first muffler 135b, a vent connection pipe 135c, and a second muffler 135d.

  The exhaust pipe 135a is connected to the left side of the cylinder 133, and the trapezoidal first muffler 135b disposed on the left side of the cylinder 133 is connected to the exhaust pipe 135a. One end of a vent connection pipe 135c is connected to the lower surface of the first muffler 135b. The vent connection pipe 135c extends downward from the lower surface of the first muffler 135b and is bent backward.

  And the 2nd muffler 135d is connected to the other end part of the back of vent connection pipe 135c (refer to Drawing 4).

  The second muffler 135d has a cylindrical shape, and an exhaust gas discharge pipe 135e bent downward is connected to a rear end portion thereof (see particularly FIG. 4). In addition, the 1st and 2nd muffler 135b, 135d has shown the expansion chamber of the muffler.

  The second muffler 135d and the exhaust gas discharge pipe 135e are inserted into a hollow exhaust cover 111g having a mountain-shaped cross section formed on the lower surface of the foot board 111. An opening 135f, which is the rear end portion of the exhaust gas discharge pipe 135e, faces the cooling air discharge port 111b formed in the lower rear side surface of the exhaust cover 111g in the exhaust cover 111g.

  FIG. 7 is an exploded perspective view for explaining a main configuration inside the footboard. In addition, the direction shown by the black arrow of FIG. 7 has shown the flow of the air used as cooling air.

  As shown in FIG. 7, the cooling air discharge port 111b is formed in the lower surface of the formed footboard 111 so as to open downward, and allows the inside of the exhaust cover 111g inside the footboard 111 to communicate with the lower surface of the footboard 111. ing.

  The cooling air outlet 111b discharges air taken into the footboard 111 from the cooling air inlets 112a and 111c and the air as cooling air taken from the cooling air inlet 112b and the slit 111d described later. To do. Exhaust gas from the opening 135f is discharged toward the road surface through the cooling air discharge port 111b.

  Thus, in engine 130, the intake system is disposed on one side in the vehicle width direction (here, the right side of the vehicle), and the exhaust system is disposed on the other side (here, the left side of the vehicle), and the exhaust gas is disposed below. Since it is possible to discharge, the influence of heat on the vehicle by the exhaust gas is prevented with a simple structure.

  Further, since the engine 130 has the first muffler 135b and the second muffler 135d as an exhaust system, exhaust noise is reduced.

  The crankshaft 131 of the engine 130 is disposed in the vehicle front-rear direction and extends rearward from the front end portion of the footboard 111. The front end portion of the crankshaft 131 is integrally formed with the rotor shaft 121 of the generator 120 disposed behind the engine 130 via the coupling 141.

  Specifically, the coupling 141 is coupled with the shaft ends of the crankshaft 131 and the rotor shaft 121 facing each other with the same axis. Therefore, when the engine 130 is driven, that is, when the crankshaft 131 rotates, the rotor shaft 121 rotates and the generator 120 drives to generate power.

  The electric power generated by the generator 120 is supplied to the battery 170, and the battery 170 is charged. The electric power generated by the generator 120 can be charged to the battery 170 and supplied directly to the drive motor 190.

  A cooling fan 150 is disposed between the engine 130 and the generator 120. The cooling fan 150 has a fan drive shaft 150a that is a part of the crankshaft 131 and fins 150b provided on the fan drive shaft 150a.

  The fan drive shaft 150a rotates as the crankshaft 131 rotates, and air (cooling air) is sent from the generator 120 side to the engine 130 side by the fins 150b of the fan drive shaft 150a. Here, cooling air is sent from the vehicle rear toward the engine 130 in front of the vehicle.

  The cooling fan 150 is covered with a cooling cover member 155 disposed inside the lower front portion of the main body 110, in other words, inside the joint portion between the down frame portion 112 and the footboard 111.

  The cooling cover member 155 has a box shape that opens downward, and is formed so as to cover the engine 130 and the exhaust system of the engine 130 from above together with the cooling fan 150.

  Specifically, the cooling cover member 155 includes a right side surface portion 155a covering the right side of the engine 130, an upper surface portion 155b covering the upper surface of the engine 130 and the upper surface of the cooling fan 150, a left side surface portion 155c covering the left side of the exhaust system, and the engine. 130 and a front surface portion 155d that covers the exhaust system from the front, and a rear surface portion 155e to which the rear end surface of the cooling fan 150 is fixed on the inner surface.

  The lower end portion of the right side surface portion 155a is fixed to the right outer surface of the crankcase 132. On the other hand, a predetermined gap is provided between the upper inner surface portion and the right outer surface of the cylinder 133 in order to avoid the heat of the cylinder 133.

  The upper surface portion 155b is curved and continuous with the upper end portion of the right side surface portion 155a and the upper end portion of the left side surface portion 155c at both left and right ends of the vehicle. That is, the cooling air inside the right side surface portion 155a is guided to the left side surface portion 155c side along the inner surface. A cap 156a for the spark plug 156 is attached to the upper surface portion 155b.

  An exhaust pipe 135a, a first muffler 135b, and a vent connection pipe 135c constituting an exhaust system are disposed inside the left side surface portion 155c. Further, the lower end portion of the left side surface portion 155c is a free end, and is disposed on the side of the bent portion of the vent connection pipe 135c.

  A lower portion of the front surface portion 155d opens to the front surface side, and a cooling air intake port 112b is formed in the front surface portion of the lower lower end portion of the down frame portion 112 facing the opening.

  As shown in FIG. 6, a partition wall portion 158 that partitions the engine 130 and the exhaust system is provided inside the cooling cover member 155 configured as described above. The partition wall 158 rises from the lower surface of the engine 130 and is formed so as to cover the cooling fan 150 from the right side at the rear end thereof.

  As shown in FIGS. 6 and 7, the footboard 111 is formed so as to be divided into upper and lower parts, and includes an upper housing 1111 that forms an upper surface portion and a lower housing 1112.

  The space on the engine 130 side partitioned by the partition wall portion 158 and the space on the exhaust system side communicate with each other via a communication portion 159.

  The cooling cover member 155 configured in this way guides the air blown from the cooling fan 150, that is, the cooling air, to the exhaust pipe side through the engine 130. Specifically, in the cooling air cover member 155, the cooling air from the cooling fan 150 is sent to the engine side to cool the crankcase 132.

  The cooling air that has passed through the crankcase 132 is guided upward by the right side surface portion 155a and the partition wall portion 158 to cool the cylinder 133. Further, the cooling air above the engine 130 and on the inner surface of the upper surface portion 155 b is guided to the exhaust system side via the upper surface portion 155 b and the communication portion 159. The cooling air guided to the exhaust system passes through the exhaust pipe 135a, the first muffler 135b, the vent connection pipe 135c, the second muffler 135d and the exhaust gas discharge pipe 135e, cools them, and passes through the cooling air discharge port 111b. Discharged outside.

  The generator 120 has flange portions 123 that protrude laterally at the left and right ends of the front side. Bolt holes are formed in the flange portion 123, and the mounting bolts 124 are inserted into the bolt holes to be fastened and fixed to the rear surface portion 155 e of the cooling cover member 155.

  In addition, a suspension part 125 is provided in the upper part of the generator 120, and the engine power generation unit 140 is suspended from the foot board 111 via the suspension part 125.

  More specifically, a hanging portion 125 provided on the upper surface of the generator 120 so as to protrude upward is provided with a cylindrical portion 125a that opens in the vehicle width direction. A cylindrical rubber bush (buffer part) 125b is fitted in the inner periphery of the cylindrical part 125a.

  On the other hand, a support rib 116 that protrudes downward is provided on the back surface portion of the upper housing 1111 of the footboard 111 that faces the hanging portion 125. The support rib has a support shaft 117 protruding in the vehicle width direction.

  The engine power generation unit 140 is swingably attached to the foot board 111 by inserting the support shaft 117 through the cylindrical portion 125 a of the suspension portion 125. Here, the inner diameter of the rubber bush 125b is formed to be approximately the same as the outer diameter of the outer peripheral portion 117a of the support shaft 117.

  The suspension position of the engine power generation unit 140 by the support shaft 117 is positioned in the vicinity of the center of gravity position O as shown in FIG. Here, it is supported by the support shaft 117 behind the center of gravity O.

  Further, on the upper surface of the generator 120, there is provided a receiving portion 126 that comes into contact with a stopper portion 118 provided so as to protrude downward from the back surface of the upper housing 1111.

  Since the engine power generation unit 140 is swingably supported by the upper housing 1111 via the support shaft 117 behind the center of gravity position O, the engine power generation unit 140 itself has a front portion inclined downward from the support shaft 117. , The rear part goes up.

  The engine power generation unit 140 is disposed so as to be substantially horizontal by preventing it from tilting forward by contacting the stopper portion 118 at a portion inclined upward (a portion behind the support portion of the support shaft 117). .

  Thus, since the cooling fan 150 is disposed between the engine 130 and the generator 120, the engine 130 can be cooled with a small and simple structure, and further, the generator 120 can be cooled. it can.

  In other words, the generator 120 disposed on the intake side is cooled by the rotation of the cooling fan 150, and the cooling air that has cooled the generator 120 is used for cooling the engine 130 that subsequently has a higher temperature than the generator 120. .

  That is, the cooling air blown toward the engine 130 cools the crankcase 132 from behind the crankcase 132 of the engine 130 and is guided upward by the right side surface portion 155a and the partition wall portion 158.

  Next, the cylinder 133 at the top of the crankcase 132 is cooled and cooled by passing through the communication portion 159 and passing through the exhaust pipe 135a, the first muffler 135b, and the vent connection pipe 135c in this order, and from the cooling air discharge port 111b to the bottom surface of the footboard 111. Is discharged to the outside. Therefore, the cool air that the cooling fan 150 sends to the engine 130 side can be used efficiently.

  In addition, the cooling air that has cooled the engine 130 cools the exhaust pipe 135a and the first muffler 135b, and passes through the gaps between these members and the vehicle body, thereby forming an air heat insulation layer in the gaps. This air insulation layer makes it difficult for heat to be transmitted to the vehicle body itself.

  Furthermore, since the engine 130 of the engine power generation unit 140 is disposed at the front lower end portion of the main body 110, that is, the front end portion of the foot board 111, vibration due to engine driving is not easily transmitted to the driver.

  A battery 170 that supplies electric power to the drive motor 190 is disposed at a rear position of the generator 120.

  The battery 170 includes a plurality of battery cells (not shown), a battery fuel gauge, and a battery thermometer. The battery cell is composed of, for example, a nickel metal hydride battery, a nickel cadmium battery, and the like, which are connected in series. The battery fuel gauge sends the battery remaining amount information to the hybrid control unit 181. The battery thermometer sends battery temperature information to the hybrid control unit 181.

  As shown in FIGS. 1, 2, and 7, the control device 180 includes a hybrid control unit 181 and a motor control unit 182 that controls the drive of the drive motor 190. Are arranged side by side.

  Hybrid control unit 181 controls charging / discharging of battery 170 and the rotational speed of engine 130. The hybrid control unit 181 sets the remaining capacity of the battery 170 and controls the engine. For example, based on the remaining battery information based on information from the battery fuel gauge, when the remaining capacity falls below a preset lower limit value, the engine 130 is started and power generation / charging by the generator 120 is started. Let

  Further, when the remaining capacity reaches a preset upper limit value, the engine 130 is stopped and power generation / charging by the generator 120 is stopped. That is, when the remaining capacity of the battery 170 falls below the lower limit value, the hybrid control unit 181 drives the generator 120 by the engine 130 until the upper limit value is reached, and charges the battery 170 with the electric power generated by the generator 120. To do.

  The hybrid controller 181 is connected to a vehicle speed sensor (not shown) that measures the vehicle speed. The hybrid controller 181 stops the engine 130 at a high speed when the vehicle speed exceeds a preset value. Furthermore, the hybrid control unit 181 stops the engine 130 when the hybrid vehicle 100 is stopped without traveling based on the detection of the vehicle speed sensor.

  The motor control unit 182 receives an accelerator signal output by the driver's accelerator operation, and the motor control unit 182 controls the power of the drive motor 190 so as to be approximately proportional to the magnitude of the input accelerator signal. . In addition, as shown in FIG. 7, in the footboard 111, a partition part 111f having a communication port is formed between the control device 180 and the battery 170, and the partition part 111f is located in front of the control device 180. It is divided into a region and a rear region. The partition 111f may be omitted. The partition portion 111 f in the foot board 111 is provided as a reinforcing material for the hollow foot board 111 in order to enhance the cooling effect of the region on the side where the cooling fan 150 is disposed.

  As shown in FIGS. 1, 2, and 7, a plurality of ventilation slits 111 d are formed on the lower surface of the foot board 111 in which the hybrid control unit 181 and the motor control unit 182 are accommodated, and communicate with the inside and outside of the lower surface. ing. Air from the slit 111d flows into the interior of the footboard 111 from the outside of the footboard 111 due to the rotation of the cooling fan 150, and is sent from the rear of the vehicle to the front engine 130 side.

  Further, a drive motor 190 is provided at a rear position of the hybrid control unit 181 and the motor control unit 182 with the rotation shaft arranged in the vehicle width direction.

  The drive motor 190 includes a motor main body 191 and a transmission 192 that drives the rear wheel 105 that is a drive wheel by changing the rotation of the motor main body 191.

  The drive motor 190 is disposed on the most rear wheel side in the main body 110. Here, the drive motor 190 is disposed in the rear end portion 111 x of the foot board 111 and in the lower end portion of the seat pillar portion 113.

  Thus, in the configuration in which the drive motor 190 is disposed on the main body 110 side, the distance between the drive motor 190 and the axle 106 of the rear wheel 105 is minimized.

  Further, since the drive motor 190 is disposed at a position closest to the rear wheel 105 on the foot board 111, the length of the power transmission mechanism to the rear wheel 105, here, the chain 194 and the like in the vehicle front-rear direction is reduced. , And can be made compact.

  The drive motor 190 transmits a driving force to the rear wheel 105 via the chain 194. That is, the sprocket 193 provided on the rotating shaft of the drive motor 190 is connected to the sprocket 107 provided on the axle 106 of the rear wheel 105 via the chain 194.

  As the chain 194, it is desirable to use a metal chain used for a bicycle or a chain in which a rubber belt is reinforced with carbon fiber. Instead of the chain 194, a drive shaft may be used to transmit the driving force of the drive motor 190 to the rear wheel 105.

  The axle 106 is fixed in a state where the wheel 108 of the rear wheel 105 is inserted, and a transmission 109 is disposed in the wheel 108.

  Thus, in the hybrid vehicle 100, the transmission 192 is disposed on the drive motor 190 side, and the transmission 109 is disposed on the rear wheel 105 side. Therefore, the transmissions 192 and 109 can be combined to widen the speed range. be able to.

  That is, by providing the transmissions 192 and 109, it is possible to maintain running performance at a sufficient speed even when a motor having a small motor maximum output or motor rated output is used as a drive motor. As a result, even when a small drive motor 190 is used, the maximum speed can be efficiently obtained while ensuring sufficient start performance.

  Furthermore, since the transmission 192 and the transmission 109 are provided on both the drive motor 190 side and the rear wheel 105 side, respectively, the structure can be made small and simple.

  In the hybrid vehicle 100, an engine power generation unit 140 having an engine 130 and a generator 120, which are heavier than other components, is disposed at the lower front side of the main body 110. That is, the engine power generation unit 140 is disposed at the front end portion inside the footboard 111.

  In particular, since the engine power generation unit 140 is disposed at the front end portion of the foot board 111 disposed between the front wheel 102 and the rear wheel 105, the seat 115 on which the driver is generally seated is located on the rear wheel 105 side. Even in view of the arrangement, it is easy to balance the weight of the entire vehicle.

  That is, load sharing between the front and rear wheels 102 and 105 is easy. Thereby, the hybrid vehicle 100 can implement | achieve an improvement of a driver | operator's operativity.

  In addition, the engine 130, the generator 120, the battery 170, the control device 180, and the drive motor 190 are located on a substantially horizontal line connecting the rotational axes of the front wheels 102 and the rear wheels 105 between the front wheels 102 and the rear wheels 105. Are arranged as follows. For this reason, the overall center of gravity is low and the center of gravity is low. Therefore, the center of gravity of the entire hybrid vehicle 100 can be lowered, the entire hybrid vehicle 100 can be slimmed, and the air resistance of the vehicle body can be greatly reduced.

  Furthermore, since the crankshaft 131 and the rotor shaft 121 of the engine 130 are disposed in the vehicle front-rear direction, the length of the crankshaft 131 and the rotor shaft 121 does not protrude in the vehicle width direction. Therefore, the hybrid vehicle 100 has a narrow vehicle width even when the engine 130 and the generator 120 are mounted. Therefore, it is possible to improve the driver's ability to reach the road surface.

  In addition, since these components 140, 120, 170, 180, and 190 are arranged linearly, the piping and wiring can be laid out so as to take the shortest distance. In addition, since the electrical resistance can be reduced by shortening the wiring, the efficiency of electricity used can be improved, and energy saving and cost reduction can be achieved.

  Further, a part of the engine 130 (crankcase 132), a generator 120, a battery 170, a control device 180 including control units 181 and 182 arranged side by side, and a drive motor 190 are arranged side by side inside the footboard 111. ing. For this reason, the upper surface area of the footboard 111 can be increased, and thereby the driver can easily put his / her feet on the footboard 111.

  According to the present embodiment, engine 130 is disposed at the lower front portion of main body 110, and fuel tank 160 is disposed above engine 130 along front fork 103. For this reason, it is not necessary to install the engine 130 and the generator 120 side by side in the vicinity of the rear wheel 105. Therefore, the center of gravity of the entire vehicle can be lowered.

  Further, since there is no need to dispose a power component such as the engine 130 in the lower part of the seat 115 behind the foot board 111, the foot board 111 is formed up to the lower part of the seat 115, and the foot part of the driver in the foot board 111 is formed. Can be widened. Therefore, it is possible to improve the driver's ability to reach the footboard 111.

  Further, the engine 130 and the generator 120 are disposed at the front end portion of the foot board 111 located between the front wheel 102 and the rear wheel 105, and the battery 170 and the control device 180 are disposed at the lower side of the foot board 111. Has been.

  For this reason, since the engine 130, the generator 120, the battery 170, the control device 180, and the drive motor 190 are arranged side by side between the front and rear wheels 102, 105, the load sharing of the entire vehicle can be easily performed. . That is, load sharing to the front wheel 102 and the rear wheel 105 can be easily performed. Therefore, it is possible to easily balance the entire vehicle and to realize a vehicle with improved operability.

  Furthermore, the engine 130, the generator 120, the battery 170, and the control device 180 are arranged in order from the lower front portion of the footboard 111 so that their center of gravity portions are substantially positioned on the axle of the vehicle body. Has been. Thereby, the left and right balance of the hybrid vehicle 100 itself can be easily taken.

  Furthermore, according to the present embodiment, the engine 130 and the generator 120 are integrally formed, so that the engine 130 and the generator 120 are easily mounted on the lower front portion of the main body 110. Can be arranged.

  Furthermore, since engine 130, cooling fan 150, and exhaust pipe 135a are covered with cooling cover member 155, the noise of these members, particularly the noise of engine 130, can be reduced. Therefore, in hybrid vehicle 100, the difference in noise between when traveling with only the motor and when traveling with engine 130 activated can be reduced, and the driver can drive comfortably.

  Thus, in the main body 110, in the foot board 111 having a substantially L shape in side view with the down frame portion 112, the engine 130, the cooling fan 150, the generator 120, the battery 170, and the control are sequentially arranged from the front side. A device 180 and a drive motor 190 are arranged in series.

  Then, the cooling fan 150 is rotated by the driving of the engine 130, the inside of the foot board 111 becomes negative pressure, and the outside air as cooling air is sucked from the cooling air suction ports 112a, 112b, 111a, 111c and the slit 111d.

  The cooling air sucked from the cooling air inlets 112a, 112b, 111a, 111c cools the intake system side, the engine 130 right side, the engine 130 rear, and the engine 130 front. In particular, the outside air taken in from the slit 111d passes through the hybrid control unit 181, the motor control unit 182, the battery 170, and the generator 120 in this order to cool them.

  Then, the cooling air reaching the cooling fan 150 passes through the cooling fan 150 itself by the rotation of the cooling fan 150, passes through the engine 130 and the exhaust system, and is discharged from the cooling air discharge port 111b.

  Specifically, the cooling air from the cooling fan 150 passes through the crankcase 132, the cylinder 133, the exhaust pipe 135a, the first muffler 135b, the vent connection pipe 135c, the second muffler 135d, and the exhaust gas discharge pipe 135e. In order from the lowest temperature.

  Therefore, the hybrid vehicle 100 can improve the cooling efficiency of the internal devices, the engine 130, and the exhaust system while driving the engine 130, and can efficiently prevent these high temperatures.

  In particular, the cooling fan 150 can efficiently cool the hybrid control unit 181, the motor control unit 182, the battery 170, the generator 120, the engine 130, and the exhaust system in order of lower temperature by cooling air from the slit 111 d. it can.

  Furthermore, since the cooling fan 150 is driven by the rotation of the crankshaft 131 of the engine 130, it is not necessary to separately prepare a drive source for driving the cooling fan 150, and can be configured compactly.

  Further, in cooling cover member 155, cooling fan 150 blows cooling air from behind in the vehicle traveling direction to engine 130, so that engine 130 can be forcibly cooled regardless of the traveling state of the vehicle.

  Further, since the cooling fan 150 is driven by the rotation of the crankshaft 131 of the engine 130, it is not necessary to prepare a separate drive source for driving the cooling fan 150, and the cooling air is sent to the engine 130 side by an efficient fan. Can send. Moreover, compared with the case where an electric fan is used, there is no power consumption and a fuel consumption deterioration can be prevented.

  In addition, although the slit 111d formed in the lower surface of the foot board 111 is located below the control device 180, it is not limited thereto, and may be formed so as to be located below the drive motor 190.

  When the slit 111 d is formed below the drive motor 190, the outside air flows from the rear of the footboard 111 to the front by the cooling fan 150 that is driven to rotate by driving the engine 130. Therefore, in addition to the control device 180, the battery 170, the generator 120, and the engine 130, the drive motor 190 can be cooled by the incoming outside air.

  Furthermore, according to the present embodiment, the engine power generation unit 140 formed integrally with the cooling cover member 155, the engine 130, the generator 120, and the cooling fan 150 is disposed in front of the footboard 111 and in the vehicle longitudinal direction. Since it is swingably attached, it is possible to prevent vibrations (rolling or pitching) of the engine 130 generated by driving the engine 130 such as rotation of the crankshaft 131 and vertical movement of the piston from being directly transmitted to the vehicle body.

  Further, according to the present embodiment, the casing upper portion 1111 has the engine power generation unit 140 in the vicinity of the center of gravity position O of the engine power generation unit 140, here, the shaft of the engine power generation unit 140 from the center of gravity position O. It is suspended via a support shaft 117 at a position displaced in the direction.

  Further, when the stopper portion 118 abuts on the position shifted from the center of gravity position O around the support shaft 117, the engine power generation unit 140 tilts so that the side shifted in the axial direction around the support shaft 117 is upward. It is arranged substantially horizontally by regulating the inclination of.

  Therefore, the engine power generation unit 140 can be easily mounted on the lower side of the foot board 111. Further, since the engine power generation unit 140 is suspended near the center of gravity O, that is, near the center of gravity O of the engine 130 and the generator 120, the rotational vibration caused by the rotary inertia mass cancels each other around the center of gravity. Thereby, the vibration of the engine 130 and the generator 120 can be reduced.

  In addition, a chain or shaft is not used as a mechanism for transmitting the driving force of the engine 130 to other components, and only the wiring and piping are used, so that engine floating suspension is possible.

  The cooling air intake port formed in the main body 110 including the foot board 111 is formed at any position as long as it is formed at a position where air is blown to the front side of the vehicle by driving the cooling fan 150. Also good.

  The hybrid vehicle according to the present invention has a low center of gravity, excellent operability, and can easily secure the ability to reach the road surface and the footboard. Further, the hybrid vehicle has an effect of reducing noise even when the engine is driven. It is useful as a hybrid vehicle having a footboard.

The side view which shows the structure of the hybrid vehicle which concerns on one embodiment of this invention II-II cross-sectional view of FIG. Sectional view taken along line III-III in FIG. The left view of the engine electric power generation unit which the hybrid vehicle which concerns on one embodiment of this invention has The top view of the engine power generation unit in one embodiment of the present invention with the cover member removed Front view of the engine power generation unit in one embodiment of the present invention excluding the front surface portion of the cover member Exploded perspective view for explaining the main configuration inside the footboard

Explanation of symbols

100 Hybrid vehicle 105 Rear wheel (drive wheel)
DESCRIPTION OF SYMBOLS 110 Main body 111 Foot board 112 Down frame part 120 Generator 121 Rotor shaft 130 Engine 131 Crankshaft 140 Engine power generation unit 150 Cooling fan 155 Cooling cover member 170 Battery 180 Controller 181 Hybrid controller 182 Motor controller 190 Drive motor

Claims (7)

An engine located in front of the footboard;
A cooling fan for blowing cooling air to the engine side;
An exhaust pipe for guiding exhaust gas discharged from the engine to an expansion chamber of a muffler;
A cover member that covers the engine, the cooling fan, and the exhaust pipe, and that guides the cooling air sent to the engine side by the cooling fan to the exhaust pipe side;
A hybrid vehicle characterized by comprising:   The hybrid vehicle according to claim 1, wherein the cooling fan is driven by rotation of a crankshaft of the engine. In the footboard, a generator driven by the engine to generate electric power for driving the driving wheels, a control circuit, and a battery are arranged,
The hybrid vehicle according to claim 1, wherein the generator, the control circuit, and the battery are disposed on an intake side of the cooling fan and are cooled by rotation of the cooling fan.   4. The cooling fan is disposed between the engine and the generator, and a rotor shaft of the generator is formed integrally with a crankshaft of the engine. The described hybrid vehicle.   The hybrid vehicle according to claim 1, wherein the crankshaft and the rotor shaft are arranged in a front-rear direction of the vehicle.   2. The hybrid vehicle according to claim 1, wherein the cooling fan is disposed on the vehicle rear side of the engine and blows air forward from the rear in the vehicle traveling direction in the cover member. A hybrid unit formed integrally with the cover member, the engine, the generator and the cooling fan;
The hybrid vehicle according to claim 5, wherein the hybrid unit is attached in front of the footboard so as to be swingable in a vehicle front-rear direction.

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