Pumps – Expansible chamber type – Moving cylinder
Patent
1987-02-04
1988-02-16
Freeh, William L.
Pumps
Expansible chamber type
Moving cylinder
123450, F04B 1922, F04B 2900, F02M 4114
Patent
active
047252090
ABSTRACT:
A distributor type fuel injection pump of the invention includes a rotor, a pair of plungers reciprocated in the rotor, the pair of plungers defining a pump chamber therebetween; a shuttle cylinder; a shuttle piston, movably located in the shuttle cylinder, for dividing the interior of the shuttle cylinder into first and second pressure chambers, the second pressure chamber being always connected to the pump chamber, thereby pressurizing the fuel in the second pressure chamber by pressurization of fuel in the pump chamber by the plungers and moving the shuttle piston to pressurize the fuel in the first pressure chamber; a distribution head for distributing and supplying the pressurized fuel in the first pressure chamber to each combustion chamber of the engine; a control rod for mechanically adjusting an initial position of the shuttle piston when the fuel is supplied to the first and second pressure chambers; and a spill hole for spilling the fuel in the second pressure chamber when the shuttle piston is moved from the initial position toward a final position by the pressure of the pressurized fuel in the second pressure chamber and reaches the final position.
REFERENCES:
patent: 3035523 (1962-05-01), Kemp et al.
patent: 3099219 (1963-07-01), Bessiere
patent: 3101079 (1963-08-01), Evans
patent: 4445822 (1984-05-01), Hoshi
patent: 4450813 (1984-05-01), Takano
patent: 4458649 (1984-07-01), Takahashi
patent: 4492200 (1985-01-01), Takahashi
patent: 4517946 (1985-05-01), Takano
Kawai Shizuo
Miyata Yukinori
Shibata Akira
Freeh William L.
Nippondenso Co. Ltd.
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