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(11) | EP 2 169 213 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Starting system for fuel injection engine |
| (57) In a control system for a fuel injection engine in which at least operations of a
fuel injection valve and a fuel pump are controlled by an electrical control unit
to become incapable of control processing in a state in which a voltage of a battery
reaches a predetermined reset voltage or lower, prohibition signal output means (41)
outputs a prohibition signal for prohibiting operation of the fuel pump (34) by detecting
starting of operation of a starter motor; permission signal output means (42) outputs
a permission signal for permitting operation of the fuel pump (34) by determining
that a pump operation permission state capable of avoiding a voltage of the battery
reaching a predetermined reset voltage or lower even by operation of the fuel pump
(34) has reached prior to fuel injection by the fuel injection valve after operation
of the fuel pump (34) is stopped in response to starting of operation of the starter
motor; and pump drive means (43) drives the fuel pump (34) according to a prohibition
signal output from the prohibition signal output means (41) and a permission signal
output from the permission signal output means (42). Accordingly, it is possible to
enhance engine startability when a battery has deteriorated.
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