JP4039572B2 - Hybrid electric vehicle - Google Patents

Description

  The present invention relates to a hybrid electric vehicle including an engine-driven generator and a battery.

  Some conventional self-propelled two-wheeled vehicles drive the wheels with an engine. However, the degree of freedom for mounting the engine is particularly limited due to the structure of the drive transmission.

  Moreover, in the electric vehicle, there are many cases in which the battery space tends to be large and a problem remains in the travel distance. In addition, there is a problem that a battery charger is separately required and the movement range is limited (for example, Patent Document 1).

  Many existing hybrid vehicles use both engine power and electric motor power, and are called parallel hybrids. These are structurally complex and tend to be expensive products with little freedom of element layout (for example, Patent Document 2). There is also a problem that the weight increases due to having two power sources.

In addition, as one of the electric vehicles, there is a hybrid electric vehicle equipped with an engine-driven generator that is charged while traveling on a battery that supplies power to a drive motor that drives a drive wheel. 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 3).
JP-A-8-175475 JP 2000-103384 A JP 2001-105899 A

  As described above, in a hybrid electric vehicle that travels while driving by transmitting the power of the drive motor to the drive wheels while charging the battery with a generator, it is particularly important to reduce the cost, weight, and size. is there.

  The present invention has been made in view of this point, and an object thereof is to provide a hybrid electric vehicle that is inexpensive, can be reduced in weight, and can be reduced in size.

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

According to the first aspect of the present invention, the vehicle body has a vehicle body footboard extending in the front-rear direction between the steering wheel and the drive wheel, and controls the power generated by the generator driven by the engine and the power of the battery. A hybrid electric vehicle that feeds power to the drive motor under control of the device and travels while transmitting the power of the drive motor to the drive wheels while charging the battery with the generator during travel,
The hybrid electric vehicle is characterized in that the engine, the generator, the battery, the control device, and the drive motor are arranged in series in the order and inside the vehicle body footboard.

  The invention according to claim 2 is characterized in that the vehicle body footboard is located below a line connecting the steering wheel and the upper end of the drive wheel as viewed from the side. It is an electric vehicle.

  The invention according to claim 3 is the hybrid electric vehicle according to claim 1 or 2, wherein an engine cooling fan is disposed between the engine and the generator.

According to a fourth aspect of the present invention, the engine has an intake system disposed on one side in the vehicle width direction and an exhaust system disposed on the other side.
The hybrid electric vehicle according to any one of claims 1 to 3, wherein the exhaust gas of the exhaust system can be discharged downward.

In the invention according to claim 5, the vehicle body footboard includes:
A cooling air intake port for cooling air is formed to open to the side of the intake system, to the front side above the engine, and to the side below the drive motor,
The hybrid electric vehicle according to any one of claims 1 to 4, wherein a cooling air discharge port for cooling air after cooling is formed to open downward on the exhaust system side. is there.

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

  According to the first aspect of the present invention, the vehicle body can be slimmed by arranging the engine, the generator, the battery, the control device, and the drive motor in series in this order and inside the vehicle body footboard. Therefore, the air resistance of the vehicle body can be greatly reduced.

  In addition, the engine, the generator, the battery, the control device, and the drive motor are linearly arranged, and piping and wiring connected to these can be laid out in the shortest distance. In addition, the wiring can be shortened and the electrical resistance can be reduced.

  In the second aspect of the present invention, the vehicle body footboard is positioned below the line connecting the steering wheel and the upper end of the drive wheel when viewed from the side, so that the air resistance can be greatly reduced.

  In the invention according to claim 3, the engine and the generator can be cooled by disposing the engine cooling fan between the engine and the generator.

  In the invention according to claim 4, the engine has a simple structure by disposing an intake system on one side in the vehicle width direction and an exhaust system on the other side so that exhaust gas from the exhaust system can be discharged downward. Therefore, it is possible to prevent the intake system from being affected by heat due to the exhaust gas.

  In the invention according to claim 5, the cooling air is sucked in from the side of the intake system and the front upper side of the engine, and is sucked in from the lower side of the driving motor to cool and cool the engine, the generator, the battery, the control device, and the driving motor. The subsequent cooling air is discharged downward on the exhaust system side. In this manner, cooling efficiency is improved by cooling from the lower temperature, and sufficient cooling can be performed with a simple structure.

  Hereinafter, although the embodiment of the hybrid electric vehicle of the present invention will be described, the present 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. 5 is a sectional view taken along line VV in FIG. 1, FIG. 6 is a side view of the vehicle body cover, and FIG. 7 is a vehicle showing a state in which the engine, the engine cooling fan, and the generator are assembled and mounted. FIG. 8 is a plan view of FIG. 7 showing a state where the engine, the engine cooling fan and the generator are assembled and mounted, and FIG. 9 is a state where the engine, the engine cooling fan and the generator are assembled and mounted. FIG. 10 is a diagram for explaining power transmission of the hybrid electric vehicle.

  1 to 6, the hybrid electric vehicle 1 of this embodiment 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.

  As shown in FIGS. 1 and 2, the engine 10 is disposed on the front side with the cylinder shaft in the vertical direction inside the vehicle body foot board 2 e of the vehicle body 2, and the intake system is arranged in the vehicle traveling direction of the engine 10 in plan view. 11 is disposed, and an exhaust system 12 is disposed on the left side in the vehicle traveling direction. The engine 10 is an air-cooled four-cycle engine.

  As shown in FIGS. 7 to 9, 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, 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. An exhaust pipe 12a is connected to the left side of the cylinder 10a of the engine 10, and a 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. 9, the exhaust gas discharge pipe 12b1 is bent toward the engine side, and the bent portion 12b2 causes the opening 12b3 to be located 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. It is possible to prevent the intake system 11 from being affected by heat due to the exhaust gas.

  Further, a generator 13 is disposed at a rear position of the engine 10, and the generator 13 generates power by the engine 10. 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. A crankshaft 10b of the engine 10 is arranged in the vehicle traveling direction, and a cooling fan drive shaft 80a of the engine cooling fan 80 is connected between the crankshaft 10b and the rotor shaft 13a of the generator 13, and the cooling fan drive shaft 80a. Are provided with fins 80b.

  Thus, the engine cooling fan 80 is disposed between the engine 10 and the generator 13, and the engine cooling fan 80 is disposed, so that the engine 10 and the generator 13 can be configured with a small and simple structure. Can be cooled.

  The engine 10 is provided inside the vehicle body foot board 2e on the front side in the vehicle running direction, and is configured such that vibration generated by the engine 10 is not easily transmitted to the rider.

  In addition, a battery 15 is disposed at a rear position of the generator 13 on the body foot board 2e of the vehicle body 2, and a control device A including a hybrid controller 16 and a motor controller 17 is disposed at a rear position of the battery 15. ing. 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. 10, 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. 10, 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 charging / discharging of the battery 15 and the number of revolutions of the engine 10, and as shown in FIG. 10, the remaining capacity setting means for setting the remaining capacity of the engine control means 16a and the battery 15. The display device 50 is connected to the hybrid controller 16.

  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 series in the traveling direction from the front side and inside the vehicle body footboard 2e. Thereby, a vehicle body can be made slim. Therefore, the air resistance of the vehicle body can be greatly reduced. Further, the engine 10, the generator 13, the battery 15, the control device A, and the drive motor 18 are linearly arranged, and piping and wiring connected thereto can be laid out in the shortest distance. In addition, the wiring can be shortened and the electrical resistance can be reduced.

  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, as shown in FIGS. 1 to 3, the vehicle body foot board 2e is formed with a cooling air intake port 90 for cooling air that opens to the side of the intake system side, and the cooling air intake port 91 is located on the upper front side of the engine. The cooling air suction port 92 is formed to open downward on the drive motor side. A cooling air discharge port 95 for cooling air after cooling 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, as shown in FIG. 3, the cooling air is sucked in from the lower side of the drive motor by the cooling air suction port 92.

  The cooling air sucked by the cooling air suction port 90 cools the engine 10 from the side of the intake system. Moreover, the cooling air sucked in by the cooling air suction port 91 cools the engine 10 from the upper front side of the engine. Further, the cooling air sucked in by the cooling air suction port 92 cools the drive motor 18, the control device A, the battery 15, the generator 13, and the engine 10. 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 a hybrid electric vehicle that travels by transmitting the power of a drive motor to drive wheels while charging a battery with the generator during travel.

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 sectional drawing which follows the VV line of FIG. It is a side view of a vehicle body cover. It is the side view seen from the vehicle running direction left side which shows the state which assembled | attached and mounted the engine, the engine cooling fan, and the generator. FIG. 8 is a plan view of FIG. 7 showing a state where the engine, the engine cooling fan, and the generator are assembled and mounted. It is the front view seen from the vehicle running direction front side which shows the state where the engine, the engine cooling fan, and the generator were assembled and mounted. 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 13 Generator 15 Battery 16 Hybrid control controller 17 Motor controller 18 Drive motor

Claims (5)

The vehicle body has a vehicle body footboard that extends in the front-rear direction between the steering wheel and the drive wheel, and supplies the generated power of the generator driven by the engine and the power of the battery to the drive motor under the control of the control device. A hybrid electric vehicle that travels by transmitting the power of the drive motor to the drive wheels while charging the battery with the generator during travel,
A hybrid electric vehicle characterized in that the engine, the generator, the battery, the control device, and the drive motor are arranged in series in the order and inside the vehicle body footboard. 2. The hybrid electric vehicle according to claim 1, wherein the vehicle body footboard is positioned below a line connecting the steering wheel and the upper end of the driving wheel when viewed from a side. The hybrid electric vehicle according to claim 1, wherein an engine cooling fan is disposed between the engine and the generator. The engine has an intake system disposed on one side in the vehicle width direction and an exhaust system disposed on the other side.
The hybrid electric vehicle according to any one of claims 1 to 3, wherein the exhaust gas of the exhaust system can be discharged downward. In the body footboard,
A cooling air intake port for cooling air is formed to open to the side of the intake system, to the front side above the engine, and to the side below the drive motor,
The hybrid electric vehicle according to any one of claims 1 to 4, wherein a cooling air discharge port for cooling air after cooling is formed to open downward on the exhaust system side.

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