Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Takashi Hayashi

Takashi Iwaki

Kenji Suga

Junichi Hida

Yoshikazu Kurata

Control and display system for a battery powered vehicle

A control apparatus for an electrically driven power steering system for a fork lift truck includes a torque sensor for generating torque signals when a steering torque is applied to the steering wheel, a load weight sensor for generating load weight signals corresponding to the load weight placed on the truck and a control circuit for supplying a driving torque to the steering assist motor in accordance with steering assist characteristics determined in accordance with the aforementioned torque signals and load weight signals. The control apparatus may also include a vehicle speed sensor so that the steering assist characteristics will be determined with the vehicle speed simultaneously taken into account.

Control apparatus for electrically driven power steering system for a

A torque detecting apparatus for an electrical power steering system, having a steering wheel, a first steering shaft connected to the steering wheel, a second steering shaft connected to a vehicle wheel to be steered, an electric motor connected to the second steering shaft, and a controller for operating the motor to produce a driving force corresponding to a torque detected by the torque detecting apparatus. The apparatus comprises: an elastic coupling having an elastic member, and coupling the steering shafts while permitting relative rotation of the steering shafts through elastic deformation of the elastic member; a first and a second detector shaft supported rotatably relative to each other; a first and a second speed-up device for increasing angular velocities of rotary movements of the first and the second steering shafts and transmitting the rotary movements to the first and second detector shafts, respectively; and a detector associated with the detector shafts to detect an angle of relative rotation of the detector shafts and thereby detect the steering torque, and producing an electric signal representative of the torque, said signal being applied to the controller.

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Kariya, Japan

Takashi Hayashi