Mitsubishi Denki Kabushiki Kaisha

Masaru Hiraiwa

Michihiro Hayashi

Shigeki Kanamaru

Hisashi Kuwada

Hideo Mitsudou

Seizo Inoue

A fuel supply apparatus capable of following the positional variations of the bottom side of a fuel tank through a simple construction and improved in terms of ease of assembly in the fuel tank. The apparatus includes a fuel pump body in which a filter-integrated pump in which a fuel pump and a fuel filter are integrally formed is integrally accommodated in a fuel reservoir having a bottom capable of coming into abutment with a bottom side of the fuel tank, and causes the fuel pump body to travel to follow the variations of the bottom side of the fuel tank so as to be placed in abutment with the bottom side of the fuel tank, by means of an urging force generated on the basis of the pressure of the fuel inside the fuel pump body.

Fuel supply apparatus

The fuel liquid level detection sectionfor detecting the liquid level of the fuel within the fuel tankis provided within the housing casingso as to cover the range from the full amount to the small remaining amount of the fuel within the fuel tank

Fuel supply apparatus and residual fuel amount indication device for fuel supply apparatus

An electric fuel pump comprising a pump casing assembly having a fuel inlet port and an outlet port and a rotary member driven by an electric motor disposed within the pump casing assembly for pumping fuel from the outlet port. A fuel discharge port supplies the fuel from the outlet port to an engine, and a pressure regulator is disposed for regulating the pressure of the fuel to be discharged from the fuel discharge port. The pressure regulator regulates the pressure of the fuel from the outlet port by returning the fuel to the vicinity of the inlet port when the pressure of the fuel from the outlet port is equal to or higher than a predetermined pressure.

Electric fuel pump

Mounted on the upper surface of the cover portion ( ) of a fuel supplying apparatus ( ) to be mounted to an opening portion ( ) of a fuel tank ( ) is a fuel pressure regulator ( ), which contains a fuel pressure detector portion ( ) constituted by a diaphragm portion ( ) detecting a pressure of the fuel discharged from a fuel pump ( ) and a current control portion ( ) for analogue-controlling the current flowing through the fuel pump ( ) by a signal from the fuel pressure detector portion ( ), whereby the fuel pump ( ) is set to pump an amount of the fuel corresponding to that required by the injector mounted to the engine, so that the current consumption of the fuel pump ( ) is reduced and the operating noise is lowered.

Fuel feed device and fuel pressure regulator

A fuel supply system is provided with a static discharge circuit (,) placed on the surface of a cover (,) fitted in the opening (,) of a fuel tank (,) and used to discharge the static electricity generated because of the intense friction between fuel and the filter element (,) of a fuel filter (,) when the fuel passes through the filter element (,). The static discharge circuit (,) is fitted with output terminals (,) so arranged as to externally output an operation confirming signal for an operation confirming display lamp (,) by making use of a pulse signal at the time of charging-discharging. Therefore, the static electricity can surely be discharged and a decrease in the amount of fuel supply to and engine can also be recognized beforehand by detecting the fact that the filter element (,) is clogged with foreign matter and/or the malfunctioning of a fuel pump (,) occurs.

Growing community of inventors

Tokyo, Japan

Masaru Hiraiwa