Internal-combustion engines – Charge forming device – With fuel pump
Patent
1989-11-07
1991-08-06
Miller, Carl Stuart
Internal-combustion engines
Charge forming device
With fuel pump
123446, 123498, F02M 3704
Patent
active
050368214
ABSTRACT:
A fuel injection system for an internal combustion engine, wherein a spill valve device operated by a piezoelectric unit is provided for carrying out a pressure pump spill operation when a fuel injection stroke is completed. The spill valve device includes a operating chamber connected to a sealed chamber of the piezoelectric unit, the sealed chamber being connected to a fuel supplementing passageway which is connected to a fuel passageway connecting a fuel tank with a fuel intake port of the pressure pump. The pressure pump is further provided with a spill passageway for discharging pressurized fuel in the pressure chamber via the fuel passageway. A check valve is provided in the fuel passageway to prevent a flow of the spilled fuel to the sealed chamber of the piezoelectric unit.
REFERENCES:
patent: 4082481 (1978-04-01), Fenne
patent: 4550744 (1985-11-01), Igashira
patent: 4643155 (1987-02-01), O'Neill
patent: 4660523 (1987-04-01), Brauer
patent: 4697565 (1987-10-01), Kobayashi et al.
patent: 4730585 (1988-03-01), Abe
patent: 4782807 (1988-11-01), Takahashi
patent: 4793314 (1988-12-01), Yoshinaga
patent: 4838233 (1989-06-01), Hayashi
patent: 4917068 (1990-04-01), Takahashi
Horiuchi Yasuhiro
Takahashi Takeshi
Toyao Tetsuya
Miller Carl Stuart
Toyota Jidosha & Kabushiki Kaisha
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