Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1983-10-21
1985-02-19
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
123498, F02M 5104, F02M 5102, F02M 3902
Patent
active
044998783
ABSTRACT:
A fuel injection system for an internal combustion engine includes a unit injector for compressing the fuel and injecting a predetermined amount of the fuel and an electronic control device. The unit injector includes a piezoelectric actuator, a piston, and an injection valve. The piezoelectric actuator comprises a columnar laminated body of disk-shaped piezoelectric elements. The laminated body is expanded or compressed in the axial direction of the column according to the application of positive or negative high voltage. The electronic control device controls the frequency of the voltage supplied to the actuator and controls accordingly the amount of fuel injection in accordance with the frequency of the voltage supplied to the actuator.
REFERENCES:
patent: 4073276 (1978-02-01), Nicolls
patent: 4082481 (1978-04-01), Fenne
patent: 4150644 (1979-04-01), Masaki et al.
patent: 4175587 (1979-11-01), Chadwick et al.
patent: 4258674 (1981-03-01), Wolff
patent: 4351299 (1982-09-01), Costello
patent: 4359032 (1982-11-01), Ohie
Igashira Toshihiko
Sakakibara Yasuyuki
Tanaka Taro
Nelli Raymond A.
Nippon Soken Inc.
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