Hitachi Unisia Automotive, Ltd.

Hitachi, Ltd.

Toru Mashimo

Satoru Watanabe

Masato Kumagai

Hironori Ohhashi

Hajime Hosoya

Hiroshi Okada

Masaaki Iijima

Yutaka Ogiwara

In a gas-tightness diagnosing apparatus for a fuel tank with an evaporative emission purge system, the gas-tightness diagnosing apparatus includes a pressurizing device, such as an air pump, which is applied to the gas-tightness diagnosing operation. The air pump itself is mounted in the fuel tank. In this construction, the layout space for the air pump can be easily allocated by applying space of the fuel tank. The whole assembly of the apparatus can be also formed compact and easily mounted on vehicles.

Gas-tightness diagnosing apparatus for a fuel tank with an evaporative emission purge system

A fuel feed system for an internal combustion engine includes a fuel tank for accumulating fuel, a fuel/air switchable pump for sucking and discharging accumulated fuel and air outside the fuel tank, a first device that allows accumulated fuel to be discharged to the engine, a second device that allows outside air to be sucked into the fuel tank, and an ECU for controlling the switchable pump.

Fuel feed system

A liquid remaining-amount detecting system includes a displacement transmitting part for transmitting displacement of a float to a rotation-angle sensor and including a bracket mounted to the bottom of a tank, an arm having a base end mounted to the bracket and a front end mounted to the float, and a link mechanism for coupling the rotation-angle sensor and the base end of the arm. The link mechanism serves to cancel displacement of the float resulting from vertical displacement of the bottom of the tank.

System for detecting remaining amount of liquid in tank

A fuel supply unit, includes: The inner section of the motor housing bulkhead is substantially sealably separated from the outer section of the motor housing bulkhead, in such a manner as to bring about an oil tightness.

Fuel supply unit

A fuel supply system for a vehicle, the fuel supply system being comprised of a fuel tank, a fuel pump installed in the fuel tank, a fuel level detection unit which is comprised of a float and a sensor member which detects a vertical displacement of the float, and a pressing member which presses with elasticity the sensor member against the inside bottom of the fuel tank.

Growing community of inventors

Gunma, Japan

Toru Mashimo