The present invention relates to motorcycle technology and more particularly, to an electric motorcycle, which directly uses a gearbox of a used or new fuel engine-based vehicle for power transmission, and an electric motor for driving the gearbox so that, subject to the optimal power transmission performance of the gearbox, the electric motor is capable of producing the most appropriate driving speed in the starting state or any of a variety of travelling state, achieving optimal output efficiency and significantly reducing power consumption and enhancing endurance.
Conventional electric cars are unable to replace fuel vehicles in market sales due to the performance of electric vehicles is still unable to meet the practical needs of consumers and the drawbacks of lack of endurance, long charging time, starting torque shortage and high cost The fastest and effective way is to change the drive mode of the motor. The drive modes of currently commercial electric vehicles can be divided into: (1) direct drive, (2) a reduction gear drive, and (3) belt type CVT (continuously variable transmission) drive.
(1) Direct drive: This drive mode is widely used in electric vehicles for the advantages of simple structure, no complex transmission system and low-cost, however, this mode shows the largest drop in the actual use. When a low horsepower motor is used, it consumes less electricity, and can easily be controlled during the period from startup to low speed. However, in the actual situation of urban driving, the electric vehicle must be frequently stopped and driven to move forwards. Due to the use of low horsepower motor, the start time is relatively prolonged, and the motor will draw a large amount of battery power from the battery in the initial stage in order to overcome inertia. During this period, the gear shift position cannot be changed to increase torque output, reducing the cruising range of the electric vehicle. Increasing the horsepower of the motor can improve the aforesaid problem; however, it will also increase electricity consumption and the risk of red burst in the vehicle initial stage, making the driver difficult to manipulate normal driving.
(2) Reduction gear drive: This mode improves the performance during the stage from startup to low speed by using a high-speed motor to match a reduction gear; however, due to the limitation of fixed gear ration, this drive mode cannot meet high-speed and low-speed driving needs at the same time (when an electric vehicle is running at a high speed, the driver can simply increase the rotating speed of the motor, however, increasing the rotating speed of the motor will simultaneously produce high temperature, increasing electricity consumption and significantly reducing the cruising range of electric vehicle).
(3) Belt type CVT drive: This mode uses two V-grooved turntables to clamp a transmission belt therebetween, and changes the centrifugal force of the V-grooved turntables by changing the rotating speed of the motor; further the expected reduction ratio can be achieved by changing the diameter ratio between the V-grooved turntables. However, in order to prevent relative sliding between the transmission belt and the V-grooved turntables, the V-grooved turntables must clamp the transmission belt therebetween positively, however, keeping the V-grooved turntables to clamp the transmission belt positively will produce high frictional heat, resulting in substantial energy loss and reducing the cruising range of electric vehicle.
Further, in a fuel engine vehicle, as shown in
Therefore, it is desirable to provide measures that eliminates emissions of pollutants, enhances motor performance, minimizes energy consumption and enhances endurance.
The present invention has been accomplished under the circumstances in view. It is the main object of the invention to provide an electric motor motorcycle, which can obtain different torque outputs when travelling in different road conditions such as uphill, downhill, etc. so that when the electric motorcycle is traveling at a low speed or high speed in different road conditions, different reduction ratio of different gear shift positions is selectively provided, maintaining optimal output efficiency of the electric motor and significantly reducing power consumption and enhancing endurance.
It is the main object of the invention to provide an electric motorcycle, which directly uses a gearbox of a used or new fuel engine-based vehicle for power transmission, and an electric motor for driving the gearbox, i.e., subject to the optimal power transmission performance of the gearbox, the electric motor is capable of producing the most appropriate driving speed in the starting state or any of a variety of travelling state, achieving optimal output efficiency and significantly reducing power consumption and enhancing endurance. Because the electric motorcycle eliminates blasting component parts such as piston, crank, crank shaft, cylinder, generator, exhaust pipe and carburetor, the cost is significantly reduced.
To achieve these and other objects of the present invention, an electric motorcycle comprises a power transmission system that comprises an electric motor, a motor controller for controlling the operation of the electric motor, a gearbox, and a main drive shaft coupled between the electric motor and the gearbox. The gearbox can be of a used or new fuel engine-based vehicle. The main drive shaft has one end thereof fixedly mounted with a belt gear and coupled to the electric motor through a transmission belt, and an opposite end thereof fixedly mounted with a main drive gear. The gearbox comprises a power input gear located at a power input end thereof and meshed with the main drive gear, a speed change gear set, a clutch coupled between the power input gear and the speed change gear set for controlling the rotating speed of the power input gear and the linking between the power input gear and the speed change gear set. The speed change gear set comprises a tachometer output sprocket located at an opposing output end thereof for driving a rear wheel of the electric motorcycle to rotate. The power transmission system further comprises a pitch shifting pedal for controlling the desired gear shift position, and a clutch lever mounted on a handlebar of the electric motorcycle for moving the clutch between a connected position and a disconnected position. When starting the electric motor, operate the clutch lever to disconnect the clutch, and then operate the pitch shifting pedal to shift the speed change gear set of the gearbox into the neutral position, and then rotate the speed twist grip to start up the electric motor, avoiding initiating an instant huge current draw. When the electric motorcycle is traveling at a low speed or high speed in different road conditions, different reduction ratio of different gear shift positions is selectively provided, maintaining optimal output efficiency of the electric motor and significantly reducing power consumption and enhancing endurance.
Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of structure.
Referring to
Further, the motor controller 11 is adapted to detect the load of the electric motor 1, to control the power output of the battery 12 according to the load of the electric motor 1, and to provide the data of the load, rotating speed of the electric motor 1 and the power volume of the battery 12 to the speedometer and tachometer 63 of the electric motorcycle 6 for enabling the rider to known.
Referring to
Referring to
In conclusion, the invention enables the electric motor vehicle (electric motorcycle) to obtain different torque outputs when travelling in different road conditions such as uphill, downhill, etc. so that when the electric motor vehicle (electric motorcycle) is traveling at a low speed or high speed in different road conditions, different reduction ratio of different gear shift positions is selectively provided, maintaining optimal output efficiency of the electric motor and significantly reducing power consumption and enhancing endurance.
Number | Name | Date | Kind |
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20050250414 | Leonov | Nov 2005 | A1 |
20070219696 | Miller | Sep 2007 | A1 |
20140299400 | Lawson | Oct 2014 | A1 |
Number | Date | Country | |
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20180037298 A1 | Feb 2018 | US |