Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1981-09-03
1983-03-22
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Fuel injection system
361152, 361154, F02B 300, F02M 700
Patent
active
043771440
ABSTRACT:
An injector driving circuit includes a first diode forwardly coupled between one end of a solenoid coil and a positive power supply terminal, a capacitor with one end grounded, a second diode forwardly coupled between the other end of the coil and the capacitor with respect to the positive power supply terminal, a switching transistor coupled between the other end of the coil and the ground and connected to be turned on in response to a driving input signal, a current detecting circuit for detecting current flowing through the coil and producing an output signal when detecting that the coil current has reached a predetermined value, and a switching circuit coupled between the one end of the coil and the other end of the capacitor and connected to be closed and opened in response to the driving input signal and the output signal of the current detecting circuit, respectively.
REFERENCES:
patent: 4180026 (1979-12-01), Schulzke
patent: 4345296 (1982-08-01), Breitling
patent: 4345564 (1982-08-01), Kawamura
patent: 4347544 (1982-08-01), Ohba
Cox Ronald B.
Tokyo Shibaura Denki Kabushiki Kaisha
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