JP2002068063A - Power-assisted two-wheeler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the traveling stability in straight driving by gyro effect. SOLUTION: This power-assisted two-wheeler 1 applying an electric motor as a driving source, and rotating and driving wheels by the electric motor to travel, comprises a gyro moment generating means 32 mounted near the center of gravity of a vehicle to generate the gyro moment, a speed detecting means 41 for detecting a traveling speed of the vehicle, and a control means 40 for changing the gyro moment corresponding to the speed. The two-wheeler comprises the gyro moment generating means 32 mounted near the center of gravity of the vehicle to generate the gyro moment, and an inclination angle detecting means 42 for detecting an inclination angle of the vehicle, and further comprises the control means 40 for increasing the gyro moment in accordance with the increase of the inclination angle on the basis of the inclination angle of the vehicle detected by the inclination angle detecting means 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motorcycle that travels by using an electric motor as a driving source and driving the driving wheels by the electric motor.

[0002]

2. Description of the Related Art As such an electric motorcycle, there is an electric motorcycle which drives an electric motor by mounting a fuel cell or a battery, for example, and travels by rotating driving wheels by the electric motor.

[0003]

In an electric motorcycle using an electric motor as a drive source, a gyro effect due to an inertial mass such as a crankshaft is hardly obtained as in a motorcycle equipped with a gasoline engine, and a gasoline engine is used. Running stability when traveling straight ahead is lower than that of a two-wheeled vehicle.

For this reason, in an electric motorcycle, it is conceivable to dispose an electric motor near the position where the gasoline engine is mounted, but the magnitude of the moment of inertia is smaller than that of the crankshaft of the gasoline engine. The effect is small.

It is conceivable to dispose an electric motor in the drive wheel. However, there is no equivalent to the crankshaft of a gasoline engine, there is no gyro effect, and it is difficult to improve the running stability of an electric motorcycle. Was.

[0006] The present invention has been made in view of such circumstances, and an object of the present invention is to provide an electric motorcycle that improves running stability during straight running by a gyro effect.

[0007]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.

[0008] The invention according to claim 1 is an electric two-wheeled vehicle that uses an electric motor as a drive source and runs by rotating drive wheels by the electric motor, and generates a gyro moment provided near the center of gravity of the vehicle. An electric motorcycle comprising: a generation unit; a vehicle speed detection unit that detects a traveling speed of a vehicle; and a control unit that changes a gyro moment according to a vehicle speed from the vehicle speed detection unit. ].

According to the first aspect of the invention, the gyro moment can be changed in accordance with the vehicle speed, and the running stability during straight running can be improved by the gyro effect.

[0010] According to a second aspect of the present invention, there is provided a control system comprising:
2. The electric motorcycle according to claim 1, wherein the gyro moment is increased at a low speed and reduced at a high speed. ].

According to the second aspect of the present invention, the gyro moment is increased at a low speed at which the vehicle tends to become unstable, so that the gyro moment is easily generated in the drive wheels. At high speeds, the gyro moment can be reduced to reduce the power consumption for driving the gyro moment generating means.
That is, the running stability at the time of going straight can be improved by the gyro effect according to the vehicle speed.

According to a third aspect of the present invention, there is provided an electric motorcycle that uses an electric motor as a drive source and runs by rotating drive wheels by the electric motor, and a gyro moment generated near the center of gravity of the vehicle to generate a gyro moment. Generating means, and tilt angle detecting means for detecting a tilt angle of the vehicle, and control means for increasing the gyro moment as the tilt angle increases in accordance with the tilt angle of the vehicle from the tilt angle detecting means. Characteristic electric motorcycle. ].

According to the third aspect of the present invention, the larger the inclination angle of the vehicle, the more easily the vehicle falls. However, since the gyro moment is increased, the vehicle can be prevented from tipping over.

According to a fourth aspect of the present invention, there is provided an electric motorcycle that uses an electric motor as a drive source and runs with the driving wheels rotated by the electric motor, the gyro moment being provided near the center of gravity of the vehicle and generating a gyro moment. Generating means, vehicle speed detecting means for detecting the traveling speed of the vehicle, inclination angle detecting means for detecting the inclination angle of the vehicle, and increasing the gyro moment as the vehicle speed increases in accordance with the vehicle speed from the vehicle speed detecting means; And / or control means for increasing the gyro moment as the inclination angle increases according to the inclination angle of the vehicle from the inclination angle detection means. ].

According to the fourth aspect of the invention, the gyro moment is increased as the vehicle speed increases in accordance with the vehicle speed, so that the running stability during straight running can be improved by the gyro effect, and the inclination angle of the vehicle can be improved. The larger the is, the more likely the vehicle falls, but the gyro moment is increased so that the vehicle can be prevented from falling.

According to a fifth aspect of the present invention, the gyro-moment generating means includes a gyro-shaft for generating a gyro-moment provided near the center of gravity of the vehicle, and a drive motor for rotating the gyro-shaft. The electric motorcycle according to any one of claims 1 to 4. ].

According to the fifth aspect of the present invention, the gyro shaft, which is provided in the vicinity of the center of gravity of the vehicle and generates a gyro moment, is rotated by the drive motor, so that the running stability at the time of straight running is improved by the gyro effect with a simple structure. Can be improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an electric motorcycle according to the present invention will be described with reference to the accompanying drawings.

First, an electric motorcycle is shown in FIGS.
FIG. 1 is a side view of an electric motorcycle, FIG. 2 is a diagram showing a gyro generator, and FIG. 3 is a cross-sectional view taken along line II-II of FIG.

The electric motorcycle 1 is provided with a body frame 2. A front fork 4 is pivotally supported by a head pipe 3 at the front end of the body frame 2 so as to be steerable left and right, a front wheel 5 is pivotally supported at a lower end of the front fork 4, and a steering handle 6 is provided at an upper end.
Has been fixed. A rear frame 7 is connected to a lower rear portion of the body frame 2. Rear frame 7
Is supported by a seat frame 9 via a rear cushion 8. A rear wheel 10 is pivotally supported by the rear frame 7.

The electric motorcycle 1 is provided with a fuel cell system and a drive system. Fuel cell 11, battery 12, fuel tank 1 constituting fuel cell system
3 is mounted on the body frame 2. The front wheel motor 21 constituting the drive system is provided on the wheel of the front wheel 5, and the rear wheel motor 22 is provided on the wheel of the rear wheel 10.

Electric power generated by the fuel cell system is supplied to the front wheel motor 21 and the rear wheel motor 22 of the drive system so that the electric motorcycle runs.

The fuel cell system supplies hydrogen from the fuel tank 13 to the fuel cell 11, and the fuel cell 11 generates electricity from hydrogen, water and air. With this electric power, the front wheel motor 21 and the rear wheel motor 22
Drive. Also, the battery 12 is charged with electric power at a low speed.

A gyro generator 30 is mounted on the electric motorcycle 1 of this embodiment. Gyro generator 3
0 is configured as shown in FIGS.

The gyro generator 30 has a configuration in which a gyro moment generating means 32 is disposed in a case 31. The gyro moment generating means 32 includes a gyro shaft 33 provided near the center of gravity of the vehicle for generating a gyro moment.
A drive motor 34 for rotating the gyro shaft 33;
It has a power transmission mechanism 35 for transmitting the power of the drive motor 34 to the gyro shaft 33, and a clutch 36 for interrupting the transmission of the power.

The clutch 36 is mechanically connected to the drive motor 34.
Is transmitted and received to the power transmission mechanism 35, but the mechanical clutch 36 is not particularly limited as long as it is disposed between the output of the drive motor 34 and the gyro shaft 33.

The gyro shaft 33 includes a flywheel 33a.
And the center of the flywheel 33a coincides with the vehicle center L1.

Next, the control of the gyro generator will be described with reference to FIGS. FIG. 4 is a control block diagram showing control of the gyro generator.

The electric motorcycle 1 of this embodiment is provided with a control means 40, a vehicle speed detection means 41, an inclination angle detection means 42, and a storage means 43. The control means 40 controls the gyro moment generating means 32. Have been.

The gyro moment generating means 32 generates a gyro moment provided near the center of gravity of the vehicle. The vehicle speed detecting means 41 detects the running speed of the vehicle, and sends the vehicle speed information to the control means 40. The inclination angle detection means 42 detects the inclination angle of the vehicle, and sends the inclination angle information to the control means 40. The storage means 43 stores a map of the vehicle speed and the gyro rotation speed.

The control means 40 stores the storage means 4 in accordance with the vehicle speed.
The gyro-moment of the gyro-moment generating means 32 is changed based on the map of the vehicle speed and the gyro-rotation speed stored in 3 to improve the running stability during straight running by the gyro effect.

FIG. 5 is a flowchart for the electric motorcycle. FIG. 5 shows a running stability control routine.

In the control flowchart of the gyro generator shown in FIG. 5, when the battery 12 is connected, an initialization program is executed (S101). The motor current value of the drive motor 34 is input (S102), the motor current command value is calculated (S103), and the running stability control routine is executed (S104).

After execution of the running stability control routine, a duty output for driving the drive motor 34 is output (S10).
5) The running stability control is executed.

After execution of the running stability control, the process proceeds to step 102 until the main switch is turned off, and is repeated (S
106), when the main switch is turned off, the battery 12
It is determined whether or not the battery is fully charged. If the battery is not fully charged, the process proceeds to step 102 until the battery is fully charged (S107). When the battery is fully charged, the operation information is written into the nonvolatile memory (S108), and the process ends when the connection of the battery 12 is turned off (S109).

In the running stability control routine of FIG. 6, when the charging voltage of the battery 12 is equal to or lower than the predetermined voltage (S20).
1), input a warning flag and return (S20)
2). If the charging voltage is equal to or higher than the predetermined voltage, it is determined whether the main switch is turned on (S203), and if it is turned off, the process returns (S204).

When the main switch is turned on, the input of the warning flag is determined (S205). If the warning flag is input, the warning lamp is turned on and the process returns (S20).
6). If the warning flag has not been input, a vehicle speed signal is read (S207), and an inclination angle signal is read (S208).

If the inclination angle θ is smaller than the predetermined value A (S20)
9), and then returns a control signal to the gyro rotation speed to a predetermined value r _s (S210). The inclination angle θ is a predetermined value A
With the above, the inclination angle θ stored in the storage means 43
A map of the vehicle speed and the gyro rotation speed is read using the parameter as a parameter (S211), and the process returns. That is, as the vehicle speed decreases, the gyro rotation speed increases as the inclination angle θ increases. While the vehicle speed to reduce the gyro rotation speed enough large becomes a predetermined value r _s a minimum is maintained.

As described above, in the electric motorcycle 1, the gyro moment can be changed in accordance with the vehicle speed, and the running stability during straight running can be improved by the gyro effect.

The gyro-moment generating means 32 has a gyro-shaft 33 provided near the center of gravity of the vehicle for generating a gyro-moment and a drive motor 34 for rotating the gyro-shaft 33. Running stability of the vehicle can be improved.

Further, there is provided an inclination angle detecting means 42 for detecting the inclination angle of the vehicle. When the inclination angle of the vehicle from the inclination angle detecting means 42 is not more than a predetermined value, the control for changing the gyro moment is not performed. As a result, the gyro moment can be changed according to the vehicle speed, and the running stability during straight running can be improved.

The control means 40 can increase the gyro moment at a low speed and decrease the gyro moment at a high speed, and can improve the running stability at the time of straight traveling by the gyro effect according to the vehicle speed.

[0043]

As described above, according to the first aspect of the present invention, the gyro moment is changed in accordance with the vehicle speed, and the running stability during straight running can be improved by the gyro effect.

According to the second aspect of the invention, the gyro moment is increased at a low speed at which the vehicle is likely to be unstable, and the gyro moment is easily generated in the drive wheels. At high speeds, the gyro moment can be reduced to reduce the power consumption for driving the gyro moment generating means. That is, the running stability at the time of going straight can be improved by the gyro effect according to the vehicle speed.

According to the third aspect of the present invention, the greater the inclination angle of the vehicle, the more likely the vehicle falls. However, since the gyro moment is increased, the vehicle can be prevented from tipping over.

According to the present invention, the gyro moment is increased as the vehicle speed increases in accordance with the vehicle speed,
The gyro effect can improve running stability when traveling straight, and the greater the inclination angle of the vehicle, the more easily the vehicle falls. However, since the gyro moment is increased, the vehicle can be prevented from tipping over.

According to the fifth aspect of the present invention, the gyro shaft, which is provided in the vicinity of the center of gravity of the vehicle and generates a gyro moment, is rotated by the drive motor, so that the running stability in straight running is improved by the gyro effect with a simple structure. be able to.

[Brief description of the drawings]

FIG. 1 is a side view of an electric motorcycle.

FIG. 2 is a diagram showing a gyro generator.

FIG. 3 is a sectional view taken along the line II-II in FIG. 2;

FIG. 4 is a control block diagram illustrating control of a gyro generator.

FIG. 5 is a flowchart of the electric motorcycle.

FIG. 6 is a running stability control routine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric motorcycle 32 Gyro moment generating means 40 Control means 41 Vehicle speed detecting means 42 Incline angle detecting means

Claims (5)

[Claims] An electric two-wheeled vehicle that uses an electric motor as a drive source and runs by rotating driving wheels by the electric motor, a gyro moment generating means provided near a center of gravity of the vehicle for generating a gyro moment, and a traveling speed of the vehicle. And a control means for changing a gyro moment in accordance with the vehicle speed from the vehicle speed detecting means. 2. The electric motorcycle according to claim 1, wherein the control means increases the gyro moment at a low speed and decreases the gyro moment at a high speed. 3. An electric motorcycle which uses an electric motor as a drive source and runs by rotating driving wheels by the electric motor, a gyro moment generating means provided near a center of gravity of the vehicle for generating a gyro moment, and an inclination angle of the vehicle. An electric two-wheeled vehicle comprising: an inclination angle detecting means for detecting the vehicle angle; and a control means for increasing the gyro moment as the inclination angle increases according to the inclination angle of the vehicle from the inclination angle detection means. 4. An electric two-wheeled vehicle driven by an electric motor as a drive source, the driving wheels being rotated by the electric motor, a gyro moment generating means provided near a center of gravity of the vehicle for generating a gyro moment, and a traveling speed of the vehicle. , A gyro moment is increased as the vehicle speed increases in accordance with the vehicle speed from the vehicle speed detection device, and / or Control means for increasing the gyro moment as the inclination angle increases according to the inclination angle of the vehicle. 5. The gyro moment generating means includes a gyro shaft provided near the center of gravity of the vehicle for generating a gyro moment, and a drive motor for rotating the gyro shaft. 2. The electric motorcycle according to claim 1.