Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1994-12-09
1996-11-12
Fleming, Fritz
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
H01H 4704
Patent
active
055746179
ABSTRACT:
A fuel injection valve drive control apparatus in which an opening current is supplied to an excitation coil to open an electromagnetic fuel injection valve, and thereafter a holding current is supplied to keeping the valve open, comprising a first switch connected in series with the coil, a valve driver for controlling conduction of the first switch, and a flywheel circuit and a second switch in parallel with the coil. The second switch is turned on a predetermined time following the start of supply of the holding current. A timer, provided to measure the predetermined time, starts clocking in response to the supply of the holding current or the valve opening current, or turning off of the first switch. The activation time of the second switch is shortened, whereby power consumption is reduced.
REFERENCES:
patent: 4180026 (1979-12-01), Sch ulzke et al.
patent: 4949215 (1990-08-01), Studtmann et al.
patent: 5134537 (1992-07-01), Buss et al.
Ariyoshi Toshiaki
Shimanuki Hiroshi
Fleming Fritz
Honda Giken Kogyo Kabushiki Kaisha
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