Fuel supply device

Abstract

The fuel supply device includes a fuel pump configured to supply fuel from a fuel tank to an outside; a set plate set on an opening of the fuel tank and including a fuel chamber in which the fuel is stored; a fuel supply passage configured to supply the fuel chamber with a part of the fuel from the fuel pump; and a first electronic circuit disposed on the set plate. An outlet configured to discharge the fuel from the fuel chamber to the fuel tank is formed in the fuel chamber. A part of the first electronic circuit is exposed in the fuel chamber of the set plate.

What is claimed is: 
     
         1 . A fuel supply device comprising:
 a fuel pump configured to supply fuel from a fuel tank to an outside;   a set plate set on an opening of the fuel tank and including a fuel chamber in which the fuel is stored;   a fuel supply passage configured to supply the fuel chamber with a part of the fuel from the fuel pump; and   a first electronic circuit disposed on the set plate,   wherein   an outlet configured to discharge the fuel from the fuel chamber to the fuel tank is formed in the fuel chamber, and   a part of the first electronic circuit is exposed in the fuel chamber of the set plate.   
     
     
         2 . The fuel supply device of  claim 1 , wherein
 the fuel supply passage is connected to a bottom of the fuel chamber, and   the outlet is adjacent to the fuel supply passage.   
     
     
         3 . The fuel supply device of  claim 1 , further comprising a controller configured to control an amount of fuel supplied from the fuel supply passage in accordance with a calorific value of the first electronic circuit. 
     
     
         4 . The fuel supply device of  claim 1  further comprising a second electronic circuit electrically connected to the first electronic circuit,
 wherein 
 the set plate includes:
 a body including a first casing configured to store the first electronic circuit, 
 a second casing configured to store the second electronic circuit, and 
 a lid attached at an opening of the first casing, 
 the fuel chamber is formed in at least a part of the first casing, 
 the second casing is positioned above the first casing, 
 the second casing and the lid are integrally formed with resin, and 
 an air passage communicating with atmosphere is funned between an upper surface of the lid and a lower surface of the second casing. 
 
 
     
     
         5 . The fuel supply device of  claim 4 , wherein
 the air passage serves as an inserting portion in which a fixing member configured to fix the second casing and the body is to be inserted.   
     
     
         6 . The fuel supply device of  claim 4 , wherein
 the second casing and a connector are for d inside of a circumference of the body.   
     
     
         7 . The fuel supply device of  claim 1 , wherein
 the first electronic circuit is a pump controller configured to operate the fuel pump.   
     
     
         8 . The fuel supply device of  claim 1 , wherein
 the first electronic circuit is a capacitance sensor configured to detect a property of the fuel.