Tokyo R & D Co., Ltd.

Seiko Epson Corporation

Nippon Steel Corporation

Masao Ono

Tatsuya Shimoda

Takeshi Seto

Akihito Uetake

Issei Yamakoshi

Satoshi Yamazaki

Tamotsu Fukazawa

Masatoshi Fukuda

Ken-ichi Endo

Osamu Watanabe

Hiroshi Sakurai

Nobuhito Ohnuma

Atsushi Mamiya

Jun Morimoto

Hiroko Yoshikawa

Akifumi Kurita

Shigemi Kikuchi

An electric motor cycle 1 carrying batteries ( ) wherein the batteries ( ) and a charger ( ) are integrated into one body, and the integrated body of batteries and charger is removably mounted on a vehicle body ( ). The batteries ( ) and the charger ( ) are further integrated with a remaining capacity meter ( ) into one body, and the integrated body of batteries, charger and remaining capacity meter is removably mounted on the vehicle body. And, a battery-monitoring CPU for protecting the batteries ( ) serves to control the charger. A signal line from the remaining capacity meter ( ) and a signal line provided on the vehicle body are connected via a connector, and a display of the remaining capacity meter is provided near a speed meter display.

Electric vehicle

A hybrid vehicle (,) including an internal combustion engine and electric motors and selectively uses them as a running drive source according to a running state. When one of wheels (,) driven by an engine (,) skids to rotate excessively, a motor (,) connected to that wheel is caused to make a regenerative operation to remedy the skid of the wheel, and running traction made insufficient due to the skid is compensated by driving another wheel (,) by a motor (,) of another wheel by using electric energy recovered by the regenerative operation.

Hybrid vehicle and method of controlling the travel of the vehicle

A drive for an electric vehicle includes by forming a drive unit 8 having a transmission by combining a single propelling motor 7 with the transmission, respectively interconnecting the drive unit 8 with propelling wheels to be a drive wheel, and separately controlling the drive units 8. Besides, traveling speed detecting means are provided on the respective drive units 8, 8, and the respective drive units are simultaneously controlled according to a revolution signal from one of the traveling speed detecting means. A method for controlling an electric vehicle by separately controlling the drive units 8, 8, making the output torque of the motor zero or minimum during the gear change, and producing again the output torque of the motor after completing the gear change.

Drive for electric vehicle and control method of the same

An electric power apparatus and a power transmitting apparatus of an electric vehicle are each constructed as a unit structure to improve the overall range and reliability of the electric vehicle. In the electric vehicle including, as a power system, a battery power supply, a motor, and a controller for controlling rotation of the motor, an electric power unit comprises a plurality of storage cells making up the battery power supply, a case housing the storage cells, a motor driving circuit and a charger both mounted on the case, a plate substrate covering the storage cells, and sockets for connecting respective terminals of the storage cells, the motor driving circuit and the charger. Also, in the electric vehicle including, as a driving system, a motor, a clutch, a transmission, and a power transmitting mechanism, a power transmitting unit comprises an automatic multiple-speed clutch transmission including a dog clutch, and the dog clutch comprises a clutch movable portion including a permanent magnet, and a clutch driving portion including excitation coils.

Electric power unit and power transmitting unit for electric vehicles

In an electric vehicle provided with an electric motor (M), a motor drive circuit (17) and a control circuit section (15) for outputting an operation command to the motor drive circuit, a variable speed drive unit for electric vehicles has a transmission apparatus (20) which engages or disengages a drive shaft (7a) which receives the drive force from a propelling motor and a driven shaft (5a) which is interconnected with propelling wheels by an electromagnetic engagement clutch (30), the transmission apparatus has the electromagnetic clutch comprised of a first clutch (22) interconnected with the drive shaft, a second clutch (25) having a rotational speed different from the first clutch, and an output side clutch (21) interconnected with the driven shaft; and the output side clutch and the first clutch or the second clutch are alternatively connected to selectively change the motor output. And, to connect the clutches mutually, the rotational speed of the clutch on the drive side is synchronized with the rotational speed of the clutch on the driven side.

Variable speed drive unit for electric vehicle and variable speed

An electromotive scooter comprises an electric drive motor and a power source indicator that provides a visual indication when the electric drive motor is in the on condition. An electric circuit supplies electric current to an acoustic device, causing it to emit an acoustical warning, when the electric drive motor is in the on condition and a seat load sensor does not sense a load on the rider's seat.

Electromotive scooter

For an electromotive scooter which gets its driving force from an electric motor driven by batteries mounted thereon, and which has a power source unit for an electromotive scooter which supplies power of nominal value of 48V to the electric motor that requires high voltage to exert high driving performance and also supplies power of nominal value of 12V via an auxiliary power source to the other electric devices in such a manner that even in a case of large fluctuation of voltage in the main power source, a stable power is assured for the electric devices, a control unit, for example, making it possible to employ as these devices those products for common use on the market. Also, the electromotive scooter provides a warning device which, by means of a pilot lamp that gives a visual signal and a warning sound that gives an acoustic signal as an equivalence of the sensation of idling of inner combustion engines, tells or warns the rider or nearby people when the switch for the electric motor is on and the vehicle is ready to run.

An electromotive scooter body is a hollow construction made of fiber reinforced plastics, so that the body is strong and light to reduce load on a traveling motive power source. The body can be separated into upper and bottom parts and the hollow of the bottom part accepts many batteries, so that a center of gravity of the scooter can be low.

Scooter body and front-wheel drive type electromotive scooter

An electric vehicle which has motor wheels of the direct-drive outer-rotor type which permit simplification and compaction of the motor wheels. Current regulating covers introduce ambient air for cooling the motors and reduce air resistance, and batteries and control devices are disposed symmetrically relative to the axial line of the vehicle body and to axial lines of the axles so as to reduce and uniformly distribute the weight of the vehicle. All these devices contribute jointly to increasing the range of the electric vehicle.

Growing community of inventors

Yokohama, Japan

Masao Ono