Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-06-07
2005-06-07
Miller, Carl S. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S447000, C123S506000
Reexamination Certificate
active
06901912
ABSTRACT:
A variable delivery fuel supply device capable of obtaining a stable fuel supply without causing noises resulted from the operation of the electromagnetic valve or a defect of the strength of a supply passage for flowing fuel of low pressure, which comprises fuel injection valves1a-1dfor injecting fuel to respective cylinders of an internal combustion engine, a fuel pump3which sucks fuel from a fuel intake port13through an intake valve15into a pressurizing chamber24by a reciprocating movement of a plunger22in a cylinder21to pressurize the fuel and supplies the pressurized fuel into the fuel injection valves1a14 1dthrough a discharge valve16, a damper chamber29having a pressure damper30, which is communicated with the fuel passage14at a position between the fuel intake port13and the intake valve15in the fuel pump3, a relief passage20for communicating the pressurizing chamber24with the fuel passage14in the fuel pump3and an electromagnetic valve19for opening and closing the relief passage20, which is adapted to control an amount and a pressure of pressurized fuel to be supplied to the fuel injection valves by relieving pressurized fuel in the pressurizing chamber24to the fuel passage14at the time of opening the valve.
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Miyajima Masayasu
Onishi Yoshihiko
Miller Carl S.
Mitsubishi Denki & Kabushiki Kaisha
Sughrue & Mion, PLLC
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