| 摘要 |
PROBLEM TO BE SOLVED: To increase a fuel flow amount without enlarging a device nor increasing a manufacturing cost to a large extent in a pulsation type diaphragm fuel pump. SOLUTION: A pump main body 3A with a pump chamber 4A formed and a diaphragm cover body 14 with a pulse pressure chamber 5 formed are overlapped each other in an outer side periphery part by sandwiching a pump diaphragm 2 dividing a pump chamber 4A from the pulse pressure chamber 5, and a suction side check valve 1a and a discharge side check valve 1b are arranged on a partitioning wall 10A separating the pump chamber 4A, the suction chamber 7A, and the discharge chamber 8A from each other. Two or more suction side check valves 1a and discharge side check valves 1b are arranged, and simultaneously operated in opening/closing, thereby a passing fuel flow amount is increased and fuel transportation capacity is improved. COPYRIGHT: (C)2005,JPO&NCIPI |
