Valves and valve actuation – Electrically actuated valve – Having element dimensionally responsive to field
Patent
1985-04-16
1986-09-09
Michalsky, Gerald A.
Valves and valve actuation
Electrically actuated valve
Having element dimensionally responsive to field
F16K 3102
Patent
active
046104275
ABSTRACT:
Disclosed is a piezoelectric control valve which is arranged midway in a passage for supplying a high-pressure fuel to a fuel injection valve, and opens and closes this passage according to expansion and contraction of a piezoelectric element laminate. The valve body of the piezoelectric control valve is slidably held in a bore into which a high-pressure fuel passage connected to the fuel injection valve and a low-pressure fuel passage communicating with a fuel storage portion are opened. An annular groove is formed on the peripheral surface of the valve body, and the high-pressure fuel passage and the low-pressure fuel passage can communicate with each other through this annular groove. A piston moving reciprocatively according to expansion and contraction of the piezoelectric element laminate is provided, and a pressure chamber is formed between the piston and the valve body. The pressure in the pressure chamber is increased and decreased by the reciprocative movement of the piston, and by this increase and decrease of the pressure in the pressure chamber, the valve body is moved to connect the high-pressure fuel passage and the low-pressure passage to each other or to disconnect these passages from each other.
REFERENCES:
patent: 4535743 (1985-08-01), Igashira et al.
Abe Seiko
Igashira Toshihiko
Natsuyama Yukihiro
Sakakibara Yasuyuki
Yoshinaga Toru
Michalsky Gerald A.
Nippon Soken Inc.
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