Internal-combustion engines – Charge forming device – With fuel pump
Reexamination Certificate
2006-09-05
2006-09-05
Moulis, Thomas (Department: 3747)
Internal-combustion engines
Charge forming device
With fuel pump
C361S154000
Reexamination Certificate
active
07100578
ABSTRACT:
The present invention achieves an increase in the amount of vapor that is expelled, stabilized fuel injection and improved starting characteristics in a fuel injection pump. In an electromagnetically driven fuel injection pump20which allows fuel to escape into the return passage5in the initial region of the pressure-feeding stroke of the plunger21, and which pressure-feeds fuel into the injection port33in the later region of the pressure-feeding stroke, pulse powering of the coil23that does not lead to the injection of fuel, i.e., pulse powering which is such that the plunger21performs a reciprocating motion through the initial region, is performed when the engine2is in an idle operating state, or in a state in which the engine2is re-started after being stopped immediately following high-load operation. As a result, vapor can be expelled with good efficiency, and the flow rate of the circulated fuel is increased so that the cooling effect is also increased, thus causing the generation of vapor to be suppressed as well, so that the starting characteristics or re-starting characteristics are improved.
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Hashimoto Shogo
Yamazaki Shigeru
Mikuni Corporation
Moulis Thomas
Wenderoth , Lind & Ponack, L.L.P.
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