Aisin Seiki Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Shigeru Nishio

Nobuyuki Hashimoto

Kenji Yogo

Mamoru Nakamura

Isamu Ota

Koichi Gomi

Yutaka Nishimura

A fuel vapor control device having a valve opening and closing a passage connecting a carburetor and a charcoal canister according to a predetermined temperature. A first coil spring formed by a 'shape memory effect' alloy is provided to urge the valve to open the passage when the temperature is high. A second coil spring urges the valve to close the passage. A solenoid is provided to urge an armature against the valve to close the passage against the force of the first coil spring when the engine is running. The solenoid heats the first coil spring to generate a spring force therein when the engine is running. When the engine is turned off, the solenoid is deactivated, and the force of the first spring overcomes the force of the second spring to open the passage until such time as the temperature of the first spring drops below the predetermined temperature.

Fuel vapor control device

An air lumbar support device utilized in an automobile seat for adjusting the curvature of a seat back by selectively regulating air pressures of a plurality of air bags accommodated in the seat back. The support device includes a pressure sensor detecting the air pressures of the seat bags, an input circuit supplying an electric signal from the pressure sensor to a control circuit, an output circuit receiving electric signal from the control circuit and causing an air control valve to actuate to thereby control the air pressures of the air bags, and a memory circuit memorizing and reading the electric signal supplied from the input circuit to the control circuit.

Air lumbar support device

A control valve device for use in a carburetor outer vent control system of an automotive internal combustion engine. The device includes a solenoid coil generating a magnetic force and a spring made of a shape memory alloy so that the device may control fluid communication in a fluid passage in response to an input current signal from a switch device and in response to changes in engine ambient temperature.

Control valve device

A control valve device for use in a carburetor outer vent control system of an automotive internal combustion engine. The device includes a solenoid coil generating a magnetic force and a spring made of a shape memory alloy so that the device may control fluid communication in a fluid passage in response to an input current signal from a switch device and changes in ambient temperature.

A lumbar support air valve assembly is comprised of a housing having a chamber therein adapted to be connected to a source of air under pressure. A plurality of outlet ports are provided through the housing corresponding in number to the number of air bags located in the lumbar support region of an automobile seat back. The passage of pressurized air to the outlet ports is controlled by a check valve associated with each outlet port. A pressure relief valve is provided for limiting the pressure within the chamber and the individual air bags to a pre-determined value. A solenoid actuator is associated with each check valve within the housing so that on operation of the solenoid actuator by means of a switch located at a remote location on or near the dash board a solenoid actuator will cause the respective check valve to open. The energization of each solenoid actuator to open a check valve simultaneously opens an exhaust port for reducing the air pressure within the air bag associated therewith.

Lumbar support air valve assembly

A temperature sensitive negative-pressure control valve is provided with a pressure adjusting means functioning to output a constant negative-pressure which is determined by the biasing force of an adjusting spring, and a temperature sensitive device for varying the biasing force of the adjusting spring, whereby variation of the biasing force of the adjusting spring imparted to the pressure adjusting device according to the temperature detected by the temperature sensitive device warrants outputting of continuously varying negative-pressure in response to the variation of the detected temperature.

Temperature sensitive negative-pressure control valve

An air controlled valve assembly for a lumbar support device of the type having a plurality of parallel, horizontally disposed air bags located in the seat back of an automobile seat includes a hollow housing having a main air distribution chamber therein and a plurality of individual air supply chambers each of which is adapted to be connected to a respective air bag. A check valve is associated with each individual air supply chamber to control the flow of air under pressure from the main air distribution chamber to the respective air bags. The check valve is adapted to be spring biased into normally closed position against a valve seat and a spring guide member is interposed between the spring and the check valve. The spring guide member is formed with a plurality of radially extending circumferentially spaced apart projections, each of which has a partial circumferential surface adapted to be in sliding engagement with a hollow cylindrical bore. The partial cylindrical surface of each projection has a groove formed therein for retaining a supply of high viscosity oil to dampen the oscillating movement of the spring guide member and check valve due to rapid fluctuations in the air supply.

Air control for a lumbar support device

An engine rotation speed control system for automotive vehicles having internal combustion engines comprises a solenoid actuated valve having a solenoid coil for controling the flow of air through a throttle bypass passage to the intake manifold during engine idling upon energization of the solenoid coil. The electrical circuit for the solenoid coil is provided with a variable resistance arrangement so that sufficient current will be supplied to the solenoid coil upon engine starting in spite of a voltage drop in the battery at cold temperatures.

Growing community of inventors

Kariya, Japan

Shigeru Nishio