Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1980-11-07
1983-05-24
Rubinson, G. Z.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
239585, 251139, H01H 4704
Patent
active
043853390
ABSTRACT:
A method of driving a valve in an injector for an internal combustion engine which intermittently injects liquid fuel by the valve reciprocally moving by attraction force of a solenoid coil and repulsive force of a spring and an apparatus for carrying out the method. An armature secured to the valve to be attracted by the solenoid coil and/or an iron core of the solenoid coil is made of a permanent magnet. The pulse shape of an electric current to be applied to the solenoid coil is made in the form of a stepped wave in which the electric power in the initial stage of application is larger than that in the later stage. An inverse pulse for inversely exciting the solenoid coil is formed to give the permanent magnet of the armature repulsive force upon fall of the pulse wave of the electric current applied to the solenoid coil.
REFERENCES:
patent: 3731881 (1973-05-01), Dixon et al.
patent: 3786314 (1974-01-01), Misch
patent: 3934816 (1976-01-01), Terrell
patent: 4148090 (1979-04-01), Kawai et al.
patent: 4187987 (1980-02-01), Raue
patent: 4264040 (1981-04-01), Saito
patent: 4299252 (1981-11-01), Reinicke
patent: 4319211 (1982-03-01), Ueda
Iwama Yoshiro
Takada Shigetaka
Tokuda Akira
Aisan Kogyo Kabushiki Kaisha
Iwama Yoshiro
Rubinson G. Z.
Schroeder L.
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