| 摘要 |
PROBLEM TO BE SOLVED: To indirectly detect rotational frequency of a pump by a pressure sensor. SOLUTION: This fuel supply device 4 includes an ink tank module 42. The ink tank module 42 includes a pump 43, a filter 44 and a pressure control valve 45. The ink tank module 42 further includes the pressure sensor 35 detecting the pressure of fuel. Since provided in the vicinity of the pump 43, the pressure sensor 35 easily detects a pulsation component caused by the pump 43. A fuel pump controller 47 includes a rotational frequency detection module 47b. The rotational frequency detection module 47b detects the rotational frequency Np of the pump 43, based on the cycle of the pulsation component included in the pressure detected by the pressure sensor 35. Thus, the rotational frequency Np of the pump 43 can be indirectly detected by the pressure sensor 35. The detected rotational frequency Np is used by a control module 47c and a diagnostic module 47e. COPYRIGHT: (C)2011,JPO&INPIT
|
