JP2005132284A - Electromotive vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cool a generator, to reduce vibrations of an engine and the generator, and to conduct easy assembling by a simple structure. <P>SOLUTION: This electromotive vehicle travels by driving the generator 13 by the engine 10 and driving a driving motor 18 by electric power generated by the generator 13. A crank shaft 10b of the engine 10 and a rotor shaft 13a of the generator 13 are mutually connected to shaft ends of the respective shafts facing each other. The crank shaft 10b is provided with an engine cooling fan 80. The generator 13 is mounted to an engine cooling fan cover 81 covering the engine cooling fan 80. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric vehicle that travels by driving a generator with an engine and driving a drive motor with electric power generated by the generator.

2. Description of the Related Art Conventionally, as one of electric vehicles, there is a hybrid electric vehicle equipped with an engine-driven generator that charges a battery that supplies power to a drive motor that drives drive wheels while the vehicle is running. There is a configuration in which electric power and battery power are supplied to a drive motor and the vehicle travels using only the power of the drive motor (for example, Patent Document 1).
JP 2001-105899 A

  In this way, in a hybrid electric vehicle that travels while driving by transmitting the power of the drive motor to the drive wheel while charging the battery with the generator, the generator is cooled because heat is generated by driving the generator. There is a need to.

  Further, when an engine or a generator is mounted on a vehicle body extending in the front-rear direction between the steered wheel and the drive wheel, a support structure that can be more easily assembled is particularly required in consideration of vibration.

  The present invention has been made in view of the above points, and provides an electric vehicle capable of cooling a generator with a simple structure, further reducing vibrations of an engine and a generator, and being easily assembled. It is an object.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is an electric vehicle that travels by driving a generator with an engine and driving a drive motor with the generated power of the generator,
Connecting the crankshaft of the engine and the rotor shaft of the generator with their shaft ends facing each other,
An engine cooling fan is provided on the crankshaft,
The electric vehicle is characterized in that the generator is attached to an engine cooling fan cover that covers the engine cooling fan.

  The invention according to claim 2 is the electric vehicle according to claim 1, wherein the coupled engine and the generator are swingably suspended from the vehicle body, and a stopper is supported by contacting the vehicle body. .

  With the above configuration, the present invention has the following effects.

  In the invention according to claim 1, the engine crankshaft and the rotor shaft of the generator are connected with their shaft ends facing each other, the engine cooling fan is provided on the crankshaft, and the engine cooling fan covers the engine cooling fan. With the structure in which the generator is attached to the cover, the generator can be efficiently cooled by an engine cooling fan that also serves as a flywheel for the engine.

  According to the second aspect of the present invention, the connected engine and the generator can be swingably suspended from the vehicle body, and can be easily mounted from the lower side of the vehicle by the support structure that supports the stopper in contact with the vehicle body. Further, by suspending and supporting the coupled engine and the generator so as to be able to swing, the rotational vibration can be canceled out around the vicinity of the center of gravity, and the vibration of the engine and the generator can be reduced.

  Hereinafter, although the embodiment of the electric vehicle of this invention is described, this invention is not limited to this embodiment. The embodiment of the present invention shows the most preferable mode of the present invention, and the terminology of the present invention is not limited to this.

  1 is a side view of the hybrid electric vehicle, FIG. 2 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is a sectional view taken along line III-III in FIG. 1, and FIG. FIG. 5 is a side view of the engine, the engine cooling fan, and the generator assembled and mounted, and FIG. 6 is a side view of the engine, the engine cooling fan, and the generator assembled. FIG. 7 is a plan view showing a state where the engine, the engine cooling fan and the generator are assembled and mounted, and FIG. 8 is a state where the engine, the engine cooling fan and the generator are assembled. FIG. 9 is a cross-sectional view showing the mounted state viewed from the front side in the vehicle traveling direction, and FIG. 9 is a diagram for explaining the power transmission of the hybrid electric vehicle.

  1 to FIG. 4, in this embodiment, a hybrid electric vehicle 1 is shown as an electric vehicle. The hybrid electric vehicle 1 includes a front fork 3 that is rotatably supported on a front end 2 a of a vehicle body 2. A front wheel, which is a steered wheel 4, is supported on the front fork 3. A steering handle 5 is provided on the top of the front fork 3.

  A pair of left and right arms 2c extend rearward at the rear end 2b of the vehicle body 2, and a rear wheel axle 8 which is a drive wheel 7 is supported by the pair of left and right arms 2c. A saddle support 2d is provided at the rear end 2b of the vehicle body 2 so as to extend upward, and a saddle 9 is attached to the saddle support 2d.

  A vehicle body footboard 2e is provided between the front end portion 2a and the rear end portion 2b of the vehicle body 2, and the vehicle body footboard 2e is slightly wider than the width of the pair of left and right arms 2c as shown in FIG. In addition, a footrest space for a rider seated on the saddle 9 is secured.

  Inside the vehicle body foot board 2e of the vehicle body 2, the engine 10 is disposed on the front side with the cylinder shaft in the vertical direction, and the intake system 11 is disposed in the vehicle traveling direction of the engine 10 in plan view, and on the left side in the vehicle traveling direction. An exhaust system 12 is arranged. The engine 10 is an air-cooled four-cycle engine.

  As shown in FIGS. 5 to 8, the intake system 11 includes an intake pipe 11a, a carburetor 11b, and an air cleaner 11c. An intake pipe 11a is connected to the right side of the cylinder 10a of the engine 10 in the vehicle traveling direction, and a carburetor 11b is disposed in the intake pipe 11a. An intake intake pipe 11d is connected to the rear portion of the air cleaner 11c. A fuel tank 14 is connected to the carburetor 11b via a fuel supply pipe 14a, and fuel is supplied by an electromagnetic valve 11b1 provided in the carburetor 11b.

  The exhaust system 12 includes an exhaust pipe 12a and a muffler 12b. The exhaust pipe 12a is connected to the left side in the vehicle traveling direction of the cylinder 10a of the engine 10, and the muffler 12b is connected to the exhaust pipe 12a. An exhaust gas discharge pipe 12b1 is arranged on the muffler 12b so as to extend downward. As shown in FIG. 8, the exhaust gas discharge pipe 12b1 is bent toward the engine side, and the bent portion 12b2 causes the opening 12b3 to be positioned below the engine 10 and allows exhaust gas to flow toward the road surface in the vehicle center direction. Released.

  In this way, the engine 10 has a simple structure by disposing the intake system 11 on one side in the vehicle width direction and the exhaust system 12 on the other side so that the exhaust gas of the exhaust system 12 can be discharged downward. The influence of heat from exhaust gas can be reduced.

  Moreover, the generator 13 is arrange | positioned in the back position of the engine 10, and this generator 13 produces electric power with the engine 10, as shown in FIG. A fuel tank 14 for storing the fuel of the engine 10 is disposed above the engine 10.

  An engine cooling fan 80 is disposed between the engine 10 and the generator 13. The crankshaft 10b of the engine 10 is disposed in the vehicle traveling direction, and the crankshaft 10b and the rotor shaft 13a of the generator 13 are connected by a coupling 99 in a direction in which the shaft ends face each other. Accordingly, the driving force of the crankshaft 10b of the engine 10 is transmitted to the rotor shaft 13a of the generator 13.

  An engine cooling fan 80 is provided on the crankshaft 10b. As shown in FIG. 6, the engine cooling fan cover 81 covers the engine cooling fan 80, and the engine cooling fan cover 81 covers the engine 10 and the exhaust system 12, as shown in FIGS. A cap 101 of a spark plug 100 is attached to the engine cooling fan cover 81.

  A lower side of the engine cooling fan cover 81 is opened, and a partition plate 81 a that partitions the engine 10 and the exhaust system 12 is disposed inside the engine cooling fan cover 81.

  Further, the lower part of the vehicle body footboard 2e is covered with a lower cover 2g, and the vehicle body footboard 2e is detachable. The lower cover 2g is formed with a cooling air inlet 96 that opens downward in the intake system side, a cooling air inlet 97 that opens in front of the intake system, and a cooling air outlet 95 that is in the exhaust system. An opening is formed on the lower side.

  As shown in FIG. 5, the generator 13 is attached to the engine cooling fan cover 81. The generator 13 is attached by forming a bolt hole 13b1 in the flange 13b and fastening the generator 13 to the engine cooling fan cover 81 with the attachment bolt 13c in the bolt hole 13b1. The generator 13 is efficiently cooled by an engine cooling fan 80 that also serves as a flywheel of the engine 10.

  As described above, the engine cooling fan 80 is disposed between the engine 10 and the generator 13, and the engine cooling fan 80 is disposed to cool the engine 10 and the generator 13 with a small and simple structure. can do.

  As shown in FIG. 5, a hanging part 13 e is provided on the top of the generator 13. The suspension part 13e is provided with a rubber bush 13f3 between the inner cylinder 13f1 and the outer cylinder 13f2. A support portion 2e1 is provided inside the vehicle body foot board 2e so as to face the suspension portion 13e. The suspended portion 13e is supported so as to be swingable by a support shaft 13g inserted through the inner cylinder 13f1 of the support portion 2e1. The support shaft 13g is disposed in the vehicle width direction, and the engine 10 and the generator 13 swing in the front-rear direction with the support shaft 13g as a fulcrum. As shown in FIG. 5, the suspension position is in the vicinity of the center of gravity O of the engine 10 and the generator 13 including the intake system 11 and the exhaust system 12.

  Further, the generator 13 is provided with a stopper 13h at a position away from the center of gravity position O, and the stopper 13h is in contact with and supported by the receiving portion 2e2 of the vehicle body footboard 2e.

  As described above, the vicinity of the center of gravity O of the engine 10 and the generator 13 is swingably suspended from the vehicle body footboard 2e, and the stopper 13h provided at a position away from the center of gravity O is provided on the receiving portion 2e2 of the vehicle body footboard 2e. Due to the support structure that contacts and supports, it can be easily mounted from the lower side of the vehicle. In addition, by hanging and supporting in the vicinity of the center of gravity O of the engine 10 and the generator 13, rotational vibrations caused by the rotary inertia mass cancel each other around the center of gravity, and vibrations of the engine 10 and the generator 13 are reduced. Can do. Further, since there is no wheel drive chain or shaft from the engine 10 and only wiring and piping, engine floating suspension is possible.

  Further, as shown in FIG. 2, a battery 15 is disposed at a rear position of the generator 13 on the vehicle body foot board 2 e of the vehicle body 2, and further includes a hybrid controller 16 and a motor controller 17 at a rear position of the battery 15. A control device A is arranged. A drive motor 18 is disposed behind the hybrid controller 16 and the motor controller 17. A sprocket 18 a of the drive motor 18 is connected to a sprocket 21 of the wheel 20 of the drive wheel 7 via a chain 19.

  In order to shorten the distance between the drive motor 18 and the axle portion of the drive wheel 7, the drive motor 18 is provided behind the engine 10 in the vehicle traveling direction.

  As described above, the power of the drive motor 18 is transmitted to the drive wheel 7 side via the chain 19, but may be transmitted to the drive wheel 7 side via the drive shaft. As the chain 19, a metal chain usually used for a bicycle or the like, or a chain in which a rubber belt is reinforced with carbon fiber is used.

  As shown in FIG. 9, the battery 15 includes a large number of battery cells 15a, a battery fuel gauge 15b, and a battery thermometer 15c. The battery cell 15a consists of a nickel hydride single cell or a nickel cadmium single cell well known in the art, and is connected in series. The battery fuel gauge 15b sends battery remaining power information to the hybrid controller 16, and the battery thermometer 15c sends battery temperature information to the hybrid controller 16.

  The hybrid electric vehicle 1 according to this embodiment includes a steered wheel 4 and a drive wheel 7. An engine 10, a generator 13, a battery 15, and hybrid control are provided between the steered wheel 4 and the drive wheel 7. A controller 16, a motor controller 17, and a drive motor 18 are disposed inside the vehicle body foot board 2e. The power generated by the generator 13 driven by the engine 10 and the power of the battery 15 are supplied to the drive motor 18, and the power of the drive motor 18 is transmitted to the drive wheels 7 to travel. A transmission 40 is disposed on the wheel 20 of the drive wheel 7.

  As shown in FIG. 9, the drive motor 18 of this embodiment includes a motor 36 and a transmission 37. The transmission 37 drives the drive wheels 7 by changing the rotation of the motor 36.

  The hybrid controller 16 is for controlling the charging / discharging of the battery 15 and the rotational speed of the engine 10, and as shown in FIG. 9, the remaining capacity setting means for setting the remaining capacity of the engine control means 16a and the battery 15. 16b and the like, and a display device 50 is connected. The display device 50 includes a warning light (not shown) and is provided in the vicinity of the steering handle 5. When the battery 15 is deteriorated, the hybrid controller 16 lights a warning light. Deterioration of the battery 15 is detected by the remaining capacity setting unit 16b based on the remaining battery information of the battery fuel gauge 15b.

  The engine control means 16a starts the engine 10 when the remaining capacity set by the remaining capacity setting means 16b falls below a predetermined lower limit value and starts power generation / charging by the generator 13, and the remaining capacity is determined in advance. A configuration is adopted in which when the upper limit is reached, the engine 10 is stopped and power generation / charging by the generator 13 is stopped. That is, when the remaining capacity of the battery 15 falls below the lower limit value, the generator 13 is driven by the engine 10 until the remaining capacity reaches the upper limit value, and the battery 15 is charged with the electric power generated by the generator 13.

  The engine control means 16a employs a configuration in which the engine 10 is stopped at a high speed when the vehicle speed detected by the vehicle speed sensor 51 exceeds a predetermined value. Further, when the hybrid electric vehicle 1 is stopped without traveling by detection of the vehicle speed sensor 51, the engine 10 is stopped.

  An accelerator signal output by the rider's accelerator operation is input to the motor controller 17, and the motor controller 17 controls the power of the drive motor 18 so as to be substantially proportional to the magnitude of the accelerator operation force.

  The engine 10 according to this embodiment is started by driving the crankshaft 10b with the generator 13, and the engine 10 is stopped when the hybrid controller 16 opens the ignition circuit.

  In this embodiment, the transmission 37 is disposed on the drive motor 18, the transmission 40 is disposed on the axle portion of the drive wheel 7, and the power of the drive motor 18 is transmitted to the drive wheel side by the chain 19. With this, the speed range can be widened. Therefore, even with a small drive motor 18, the maximum speed can be efficiently achieved while ensuring sufficient start performance. The drive motor 18 is disposed on the front side in the vehicle traveling direction with respect to the tire outer peripheral portion 7 a of the drive wheel 7.

  Further, by installing the transmissions 37 and 40 on both the drive motor side and the drive wheels, the structure can be made small and simple. It is also possible to incorporate the transmissions 37 and 40 while minimizing the weight increase on the drive wheel side.

  In addition, because the transmission performance can be maintained at a sufficient speed even when the transmission 37, 40 uses a motor with a maximum motor or a small rated output, it is energy-saving and equipped with a small engine and a clean, compact and small exhaust gas. A lightweight new hybrid electric vehicle 1 can be configured.

  Further, the transmissions 37 and 40 are automatic transmissions, and can further improve the maneuvering performance and running performance because the operation of the operator can be simplified. Only one of the transmission 37 or the transmission 40 may be an automatic transmission. Further, in this embodiment, the power of the drive motor 18 may be transmitted to the drive wheel side by a drive shaft instead of the chain 19.

  In the hybrid electric vehicle 1 of this embodiment, the engine 10, the generator 13, the battery 15, the control device A, and the drive motor 18 are arranged in order from the front side in the traveling direction and inside the vehicle body foot board 2e. Thereby, a vehicle body can be made slim. Therefore, the air resistance of the vehicle body can be greatly reduced. Moreover, piping and wiring can be laid out in the shortest distance by linear arrangement. In addition, the wiring can be shortened and the electrical resistance can be reduced. As a result, efficiency is improved, and energy saving and cost reduction can be achieved.

  Further, as shown in FIG. 1, the vehicle body foot board 2e is positioned below a line L1 connecting the steering wheel 4 and the upper end of the drive wheel 7 when viewed from the side, and the vehicle body foot board 2e is operated when viewed from the side. The air resistance of the vehicle body can be significantly reduced by being positioned below the line L1 connecting the upper end of the wheel 4 and the drive wheel 7.

  Further, the vehicle body footboard 2e is formed with a cooling air intake port 90 for cooling air that opens to the side of the intake system, and a cooling air intake port 91 that opens to the upper front side of the engine. 92 is formed to open downward on the drive motor side. The lower cover 2g is formed with a cooling air intake port 96 that opens downward in the intake system side, a cooling air intake port 97 that opens in front of the intake system side, and the cooling air after cooling. A cooling air discharge port 95 is formed to open downward on the exhaust system side.

  When the hybrid electric vehicle 1 travels, the inside of the vehicle body footboard 2e becomes negative pressure by driving the engine cooling fan 80. For this reason, as shown in FIG. 3, the cooling air is sucked from the side of the intake system by the cooling air suction port 90, and the cooling air is sucked from the front side above the engine by the cooling air suction port 91. Further, the cooling air is sucked in from the lower side of the intake system side by the cooling air suction port 96 and is sucked in from the front side of the intake system side by the cooling air suction port 97. Further, as shown in FIG. 3, the cooling air is sucked from the lower side of the drive motor side by the cooling air suction port 92, and the cooling air cools the drive motor 18, the control device A, the battery 15, the generator 13, and the engine 10. To do. These cooling airs can further improve the cooling efficiency by cooling in the order of the exhaust pipe 12a and the muffler 12b that constitute the exhaust system 12 from the lowest temperature. A compact, lightweight and inexpensive hybrid vehicle can be constructed.

  The present invention can be applied to an electric vehicle that travels by transmitting the power of a drive motor to drive wheels while charging a battery with a generator during traveling.

It is a side view of a hybrid electric vehicle. It is sectional drawing which follows the II-II line | wire of FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is the side view seen from the vehicle advancing direction left side which shows the state which assembled | attached and mounted the engine, the engine cooling fan, and the generator. It is sectional drawing seen from the vehicle advancing direction left side which shows the state which assembled | attached and mounted the engine, the engine cooling fan, and the generator. It is a top view which shows the state which assembled | attached and mounted the engine, the engine cooling fan, and the generator. It is sectional drawing seen from the vehicle advancing direction front side which shows the state which assembled | attached and mounted the engine, the engine cooling fan, and the generator. It is a figure explaining the power transmission of a hybrid type electric vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hybrid type electric vehicle 2 Car body 2e Car body foot board 4 Steering wheel 7 Drive wheel 10 Engine 10b Crankshaft 13 Generator 13a Rotor shaft 15 Battery 16 Hybrid controller 17 Motor controller 18 Drive motor

Claims (2)

An electric vehicle that drives a generator with an engine and drives a drive motor with the power generated by the generator,
Connecting the crankshaft of the engine and the rotor shaft of the generator with their shaft ends facing each other,
An engine cooling fan is provided on the crankshaft,
An electric vehicle characterized in that the generator is attached to an engine cooling fan cover that covers the engine cooling fan. 2. The electric vehicle according to claim 1, wherein the coupled engine and the generator are swingably suspended from a vehicle body, and a stopper is supported in contact with the vehicle body.

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