Toyoda Koki Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Tetsushi Kawamura

Hidetoshi Fujiwara

Tomonari Yamakawa

Kazushi Suzuki

A pressure sensor is provided with a semiconductor device that is capable of detecting a pressure, a terminal that is connected to the semiconductor device by a bonding wire, a housing having an accommodation space for the semiconductor device, the bonding wire, and the terminal, a diaphragm for sealing the accommodation space, and working fluid that is sealed in the accommodation space and transmits a pressure applied to the diaphragm to the semiconductor device. The working fluid is silicone-based oil, and the terminal and the housing are sealed by fluorine-based adhesive.

Pressure sensor containing fluorine-based adhesive

In a power-assisted steering system including a steering shaft arranged to be rotated by steering effort applied thereto, a fluid pump driven by a prime mover of the vehicle, a hydraulic cylinder having a power piston mounted for reciprocating movement in the cylinder and operatively connected to driven members of the steering system, and a servo valve interconnecting the fluid pump and the cylinder and being responsive to rotary motion of the steering shaft for selectively directing the flow of fluid under pressure from the pump to one of opposite fluid chambers of the cylinder and permitting the flow of fluid from the other fluid chamber to a fluid reservoir to effect reciprocating movement of the power piston, an electrically operated control valve of the normally closed type is disposed within a bypass passage between the opposite fluid chambers of the cylinder to permit the flow of fluid passing through the bypass passage in its energized condition so as to restrain rapid increase of the pump load during maneuvers of the vehicle. The control valve is arranged to be energized when the power piston approaches to its stroke end.

Control apparatus for power-assisted steering system

An attachment for a synthetic resinous reservoir as used in an automotive power steering system is provided with a steel bracket having a vertically extending dovetail slot whose horizontal width is narrowed as the height of the same decreases. The synthetic resinous reservoir has protruded from its side surface a vertically extending dovetail portion whose horizontal width is likewise narrowed as the height of the same decreases for close fitting in the dovetail slot. The dovetail portion presents at a part thereof a horizontal surface portion, which is in abuttable engagement with an upper end of a holding member bodily formed on the bracket, so that the reservoir can be prevented from generating chatter relative to the bracket.

Growing community of inventors

Okazaki, Japan

Tetsushi Kawamura