Hitachi, Ltd.

Isuzu Motors Limited

Hitachi Automotive Engineering Co., Ltd.

Agency of Industrial Science and Technology

Hitachi Automotive Eng. Co., Ltd.

Shigeki Saito

Hideo Kawamura

Osamu Koizumi

Kazuo Tahara

Hisatugu Ishikura

Katsuyuki Tamai

Masato Sakai

Toshihiro Yamanaka

Hiroshi Kimura

Toshiaki Okuyama

Shotaro Naito

Keiji Oda

Toshimi Abukawa

Mitsuyuki Hombu

Tsutomu Ohmae

Seizi Yamashita

Shoji Motegi

Toshiyuki Koterazawa

Toru Tatsuzaki

Shuichi Takamatsu

Syoichi Kawamata

Hiroshisa Yamamura

Fumio Tagima

Hiroyosi Sakurai

Nobuyoshi Onuma

Katsuji Murumoto

Hisatsugu Ishikura

A turbo-charger with a rotor directly connected thereto has a turbine impeller, a turbine shaft secured to the turbine impeller and a compressor secured to the turbine shaft and driven thereby to forcibly feed air into an internal combustion engine. The rotor is provided on the turbine shaft and so structured as to prevent the occurrence of an unbalanced condition during rotation of the turbine shaft.

Turbo-charger with rotary machine

An electric power steering control system includes an electric motor for producing an assisting torque for the vehicle steering system through a reduction gear, a steering torque sensor fitted on the steering shaft, a controller for controlling the input to the motor in accordance with the torque sensor output, a battery for supplying power to the controller, and a voltage step-up circuit connected to the battery for driving the motor at a voltage higher than the battery voltage. The controller drives the motor at a high voltage.

Electric power steering control system

Intake and exhaust ports of an internal combustion engine possess respective turbine impellers, and an electrical rotary machine is formed on a rotary shaft connecting the impellers. Sensors are provided for sensing the loaded state of the engine at all times based on engine rpm and the amount of fuel supplied to the engine. When the engine is overloaded, the electrical rotary machine is made to operate as a motor to assist in the supercharging of the engine. When the engine load is not excessive, the rotary machine is made to operate as a generator to charge surplus energy, derived from the engine exhaust, in a storage battery.

Auxiliary apparatus for a turbocharged internal combustion engine

An electric power steering device for generating and controlling auxiliary steering force using a motor, having, a detector for detecting operation force transmitted from a steering wheel to a steering mechanism of a vehicle, and a controller for controlling current supplied to the motor depending on the detected operation force, wherein the electric current is maintained zero when the detected operation force is smaller than a predetermined value and a proportional relationship is maintained between the detected operation force and the electric current when said detected operation force is greater than the predetermined value.

Electric power steering device

An electric power steering apparatus comprises a steering shaft 34, a detector 27 for detecting an operation of the power steering apparatus, an electric motor 3 driven in response to an output of the detector 27 for generating an assisting force for a steering operation, and a reduction gear 1 including an input shaft 2 driven by the electric motor 3, an output shaft 13 connected to the steering shaft 34, and a planetary gear mechanism 36 for reducing the rotational speed of the input shaft 2 and transmitting the reduced rotational speed to the output shaft 13. The planetary gear mechanism 36 includes a sun gear 6 rotatable with the input shaft 2, a ring gear 8, planet gears 7 connected to the output shaft 13 and adapted to transmit revolving motion thereof around the sun gear 6 to the output shaft 13, and a gear case 18 for accommodating the sun gear 6, the ring gear 8, and the planet gear 7. As electromagnetic clutch 35 is accommodated in the gear case 18 and is switched over in response to the output of the detector 27 between a first position in which it locks the ring gear 8 unrotatably and a second position in which it releases the ring gear 8 to allow it to be rotatable with respect to the output shaft 13.

Electric power steering apparatus

A motor/generator is mounted on the turbine shaft of a supercharger in an internal combustion engine. Whether the motor/generator should operate as a motor or a generator is determined by a signal from a flow rate sensor that detect the rate of fuel flow and a signal from a rotation sensor that detects rotation of the internal combustion engine. When the motor/generator operates as a generator, the fuel flow rate is controlled in response to an output signal indicative of electric power from the generator. When the motor/generator operates as a motor, electric power supplied thereto is controlled in response to an accumulated value of supplied electric power.

Control system for supercharger in internal combustion engine

The present invention provides a controller for a power steering control system with a current limiter for limiting current to be fed to a power steering motor, in accordance with a power source voltage, whereby the power source is prevented from falling into an overdischarge state while a power steering function is performed. An additional feature of the present invention is an idle speed control device for increasing the engine idle speed when the current of the power steering motor reaches a predefined level.

Motor-driven power steering apparatus

Disclosed is an apparatus for controlling a motor unit including a variable-speed reversible main motor for driving a load and a subsidiary motor for driving a fan. The control apparatus comprises a temperature sensor circuit sensing the temperature of the main motor and generating a first output signal when the temperature of the main motor exceeds a first predetermined level, a second output signal when the main motor temperature exceeds a second predetermined level higher than the first predetermined level and a third output signal when the main motor temperature drops to a level lower than the first predetermined level, and a control circuit connected to the temperature sensor circuit for energizing the subsidiary motor in response to the first output signal, deenergizing the main motor in response to the second output signal and deenergizing the subsidiary motor in response to the third output signal.

Control apparatus for variable-speed reversible motor

A cooling device for an electrical rotating machine is provided. The cooling device comprises; a yoke of an electric motor, end brackets and a rocker positioned in the outer circumferential portion of a commutator and fastened through the mediary of ventilation spaces to the inner circumference of one of the aforesaid end brackets. The cooling device further comprises; a screening plate for controlling the direction of cooling air being blown and a strength thereof, which is disposed between one end of the aforesaid rocker and the yoke; and a forcibly blowing device. With this cooling device, the cooling air is introduced through ventilating spaces defined radially inwardly of the aforesaid one end bracket into an electric motor by the forcibly blowing device, thereby forcibly cooling the surface of the commutator and the peripheral portion thereof.

Cooling means for electrical rotating machine

A magnetizing device for a permanent magnet motor used for driving an electric vehicle in which a magnetizing coil is wound around the permanent magnet of the permanent magnet motor, and means are provided for detecting a specific step such as manipulation of the key switch in the electric vehicle in a series of predetermined steps required for the operation of the electric vehicle. In response to the detection of such specific manipulation, magnetizing current is supplied to the magnetizing coil from the battery of the electric vehicle so that the permanent magnet can be automatically magnetized.

Magnetizing device for permanent magnet motor for electric vehicle

Growing community of inventors

Katsuta, Japan

Shigeki Saito