| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To control undesired phenomena such as a malfunction of a sub fuel pump and exhaust gas temperature rise due to a fuel supply deficiency when the sub fuel pump is combinedly only in a given pump combinedly using region of a high revolution speed-high load side for the purpose of meeting high output performance. <P>SOLUTION: A fuel supply control device is equipped with a main fuel pump 21 and the sub fuel pump 22 which are electrically-operated and then operate by an applied voltage output from a battery 25. Only the main fuel pump 21 operates in a given single pump region, while both the pumps 21, 22 operate in the high revolution speed-high load side higher than the single pump region. A malfunction of the sub fuel pimp 22 caused by breaking of wire is detected by using a voltage-drop amount determined by subtracting an upstream voltage of the sub fuel pump 22 from a battery voltage. When the malfunction is detected, a pump combinedly-used region is restricted by limiting, e.g., a throttle open degree. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
