Fuel pump module and vehicle fuel tank internal pressure sensor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTateki Mitani, Shigeki Kanamaru, Tetsushi Noda
Life of this patent
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Abstract
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.
Claims16
A fuel pump module comprising:
- a bracket for closing an opening of a vehicle fuel tank;
- a fuel pump held in the bracket, for sending out fuel stored in the fuel tank;
- and
- a tank internal-pressure sensor including:
- a diaphragm disposed in an inside of the fuel tank viewed from a principal surface of the bracket, for receiving internal pressure and external pressure of the fuel tank;
- a housing portion for housing the diaphragm;
- an external pressure lead-in portion having smaller section area than the housing portion, the external lead-in portion for leading the external pressure of the fuel tank into the tank internal-pressure sensor;
- and
- a lead-in hole defined in the bracket, for leading one of the external and internal pressures of the fuel tank,
- wherein the tank internal-pressure sensor detects the internal pressure of the fuel tank on the basis of an output of the diaphragm.
A fuel pump module comprising:
- a bracket made of an electrically insulating resin for closing an opening of a vehicle fuel tank, the bracket in which a conductive terminal is insert-molded, the conductive terminal has one end serving as an external connection end;
- a fuel pump held in the bracket, for sending out fuel stored in the fuel tank;
- and
- a tank internal-pressure sensor including:
- a diaphragm for receiving internal pressure and external pressure of the fuel tank;
- a power-supply terminal;
- a signal terminal;
- and
- a lead-in hole defined in the bracket, for leading one of the external and internal pressures of the fuel tank,
- wherein the power-supply terminal and the signal terminal are connected to the other end of the conductive terminal;
- and
- wherein the tank internal-pressure sensor detects the internal pressure of the fuel tank on the basis of an output of the diaphragm.
A vehicle fuel tank internal pressure sensor comprising:
- a bracket for closing an opening of a vehicle fuel tank;
- and
- a tank internal-pressure sensor including:
- a diaphragm disposed in an inside of the fuel tank viewed from a principal surface of the bracket, for receiving internal pressure and external pressure of the fuel tank;
- a housing portion for housing the diaphragm;
- an external pressure lead-in portion having smaller section area than the housing portion, the external lead-in portion for leading the external pressure of the fuel tank into the tank internal-pressure sensor;
- and
- a lead-in hole defined in the bracket, for leading one of the external and internal pressures of the fuel tank,
- wherein the tank internal-pressure sensor detects the internal pressure of the fuel tank on the basis of an output of the diaphragm.
Dependencies are inferred from the claim text.