Nippondenso Co., Ltd.

Olympus Optical Company, Ltd.

Toshihide Takechi

Noriyuki Iyama

Masao Sakurai

Kazuyoshi Sumiya

Fumito Orii

Morimasa Ninomiya

Takashi Fujii

Yousuke Hamada

Kunihiro Nakagawa

A temperature control system has a light intensity detection device for providing temperature compensation in accordance with the variation in angle of incident sunlight. The light intensity detection device includes a photoelectric device having a light receiving surface and which produces an electrical output signal in accordance with the intensity of received light. An optical device is disposed between a light source and the light receiving surface. Incident light transmitted through the optical device is re-directed to the light receiving surface by a plurality of prism surfaces disposed on the optical device facing the photoelectric device. The prism surfaces may be concentrically arranged around the optical axis of the photoelectric device. The surface area and angle of orientation of respective prism surfaces are predetermined such that the output electrical signal of the photoelectric device corresponds to a predetermined function in accordance with the thermal energy produced in the vicinity of the light intensity detection device as a function of the angle of incidence of incident light. Thus, the temperature, for example, in an automobile cabin may be precisely and accurately controlled and any variation in thermal energy within the interior of the cabin due to incident light may be compensated for.

Light intensity detection apparatus for a luminous flux with a changing

An automobile differential gear system capable of establishing an appropriate differential motion between the right and left driving axles of an automobile so that the automobile is able to run smoothly along a curve where the right and left driving axles are required to be driven at different revolving rates respectively. The system comprises a differential gear, a steering angle detecting unit for detecting a steering angle, a driving speed detecting unit for detecting the speed of the differential gear case, a pinion speed control unit which provides a control signal for controlling the differential motion of the right and left driving axles of the automobile, and a pinion driving unit for rotating the pinions to control the respective revolving rates of the right and left driving axles according to the control signal so that correct and quick response of the movement of the automobile to steering operation is achieved.

Automobile differential gear system

Growing community of inventors

Anjoh, Japan

Toshihide Takechi