Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Shigeki Kanamaru

Tateki Mitani

Hiroshi Yoshioka

Masaru Hiraiwa

Seiji Tsutsui

Kazushi Ishii

Satoshi Nishikawa

Eiji Yagyu

Sadayuki Matsumoto

Masakazu Takabayashi

Kiichi Yoshiara

Hideo Horibe

Yasuhisa Shimakura

Michihiro Hayashi

Yutaro Hamatani

Tetsushi Noda

An optical fiber sensor includes: an optical fiber; a light source portion; and a light receiving portion. The optical fiber includes: a core that includes a grating that generates a clad mode upon receipt of light; a clad that covers the core; and a fiber jacket that covers the clad, wherein a part of the fiber jacket corresponding to an area where the grating is formed is removed so that the clad is contactable with the fuel. The light source portion includes a light cutting element that emits light, whose wavelength is within a wavelength band of the cladding mode toward the optical fiber. The light receiving portion that detects intensity of the light transmitted through the grating. The optical fiber, the light receiving portion and the light source portion are arranged linearly.

Optical fiber sensor and fuel supply apparatus having the same

The detection device provides with an optical fiber composed of a core, a clad and a fiber jacket. A grating is applied to the core, and the fiber jacket located at the portion to which the grating is applied is removed so that the clad is in contact with a fuel fed to an injector of a vehicle. The detection device also provides with a light source for incidence of a light in a range of clad mode wavelength to the optical fiber, and a light-sensitive part for detecting an intensity of the light transmitting through the region to which the grating is applied. The optical fiber, light source and light-sensitive part are held in a conduit disposed in a fuel tank or between a fuel pump and the injector of the vehicle.

On-vehicle fuel property detection device

An optical fiber sensor that can detect a liquid level or detect a property of liquid with high reliability even under a frequently vibrational environment. The optical fiber sensor includes an optical fiber that includes a core having an area where a grating is formed and a clad, the optical fiber being disposed so that at least a part of the area with the grating is immersed in liquid, a light source for making light incident to the optical fiber so that a cladding mode light having a wavelength band is generated by the grating, and a light receiving unit for detecting the intensity of light which is incident from the light source to the optical fiber and transmitted through the grating.

Optical fiber sensor

A fuel supplying apparatus comprising a fuel pumpdisposed within a fuel tankfor pumping fuel to an injector, a pressure regulatorfor discharging an excess amount of fuel out of the fuel from the fuel pumpinto the fuel tankas an excess fuel, a fuel filterdisposed within a flow path connected between the fuel pumpand the pressure regulatorupstream of the pressure regulatorand having a filter elementaccommodated within an electrically insulating housingfor filtering the fuel discharged from said fuel pump, characterized by a grounding device comprising an electrically conductive protectoror an electrically conductive memberfor providing an earth to the filter element, whereby an electrostatic electricity generated while the fuel is passing through the filter element can be ensured to be dissipated, allowing a stable fuel supply.

Fuel supply apparatus

A fuel vapor leak detecting apparatus, includes: a valve which is in a vapor purge system including a canister that is communicated with a fuel tank and an internal combustion engine, and which controllably closes the vapor purge system; a pressurizing section which introduces atmospheric air into the vapor purge system to pressurize the vapor purge system; and an internal-pressure measuring section which detects an internal pressure of the vapor purge system. The pressurizing section supplies the air for a predetermined time in a state where the vapor purge system is closed. When the internal pressure measured by the internal-pressure measuring section at the air supply is equal to or lower than a preset criterion pressure, it is judged that leak occurs.

Fuel vapor leak detecting apparatus, and fuel supplying apparatus to be applied to the same

An apparatus for detecting fuel-vapor gas leaks that includes a jet pump () that introduces outside air into and pressurizes a vapor purge system including a fuel tank () by gasoline flow from a fuel pump (); an internal pressure sensor () for measuring vapor purge system internal pressure, an open/close controllable reference orifice () that causes leakage through a reference leak hole; and a storage device for storing as an initial curve pressure changes during pressurization by the jet pump () for a predetermined time period, with the reference orifice () alone opened. The device can accurately detect leakage even while an internal combustion engine is running because it judges leak presence/absence by comparing a time series in a pressure curve obtained by jet pump () pressurization over the predetermined time period while idling with the vapor purge system completely shut-off, with a time series in the initial curve.

Apparatus for detecting fuel-vapor gas leaks, and vent valve apparatus applied to this apparatus

A discharge path for discharging static electricity generated in a fuel filter built in a fuel supply apparatus mounted in a tank is formed with accuracy. A housing container of a fuel filter is formed by heat welding a main housing and a lid housing at a welding face 5 , a support frame of a filter is formed of a conductive thermoplastic resin, a part of the support frame accommodated in the main housing is at the same height as a welding face , and an end of a peripheral wall for a communicating hole formed on the lid housing is formed at the same height as a heat welding face of the lid housing , wherein an earth conductor is connected to an exposed pedestal of the support frame exposed by heat welding the part of the support frame and the end of the communicating hole fluid-tight simultaneously with formation of the housing container.

Fuel feeder

A fuel pump module is formed in such a manner that a sensor unit having a semiconductor diaphragm is provided in a recess of a bracket having a flange portion holding a fuel pump through a high-pressure filter. The recess is closed by a sensor cap having a lead-in pipe to thereby form an tank internal-pressure sensor. While internal pressure of a fuel tank is led into the tank internal-pressure sensor through an internal pressure lead-in pipe, atmospheric pressure is led into the tank internal-pressure sensor through an external air intake hole provided in the lead-in pipe. Thus, internal pressure of the fuel tank is detected.

Fuel pump module and vehicle fuel tank internal pressure sensor

Fuel feed device

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

A fuel supply apparatus mounting structure in which a set plate for holding a fuel supply apparatus is not corroded or deteriorated by the exposure to salt for thawing snow sprayed in winter in cold districts or to salt particles contained in sea wind in coastal areas is provided. The fuel supply apparatus mounting structure comprises a fuel pump disposed within a fuel tank for pumping fuel to an internal combustion engine, a set plate made of a synthetic resin and holding the fuel pump and closing an opening hole in the fuel tank , a gasket for maintaining airtight between the set plate and the fuel tank , and a plate for fastening the set plate to the fuel tank , and a protective member made of a material which is not reacted, dissolved or deteriorated by a reaction product generated by a chemical reaction occurring between the plate and the set plate is inserted.

Mounting structure for a fuel supply apparatus

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 supplying apparatus comprising a fuel tank, a fuel pump, a pressure regulator and a fuel filter disposed in a fuel line connected between the fuel pump and the pressure regulator for filtering the fuel supplied from the fuel pump. The pressure regulator has an inlet port through which the pressure within the fuel tank is introduced into the diaphragm chamber of the pressure regulator is disposed between a fuel surface level and the ceiling of the fuel tank. The excess fuel discharge port is disposed in the vicinity of and in a facing relationship to a wall surface, which may be provided with a shock absorbing member, of a fuel pump mounting bracket, a sub-tank, pressure regulator holder or a barrier. The fuel filter has a hollow cylindrical configuration and the fuel pump together with a mounting bracket for supporting the fuel pump is housed within the hollow cylindrical fuel filter.

Growing community of inventors

Tokyo, Japan

Shigeki Kanamaru