Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1994-04-28
1995-09-26
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
361152, F02D 4130, H01H 4732
Patent
active
054527007
ABSTRACT:
A current flowing to a fuel injector is completely cut off when an injection pulse signal is OFF at a timing to stop conduction of the fuel injector to reliability close the fuel injector, and when an injection pulse signal is OFF at a timing to stop conduction of an injector, an output transistor of a comparator is on to forcibly set a base potential of a switching transistor to a low level so as to completely cut off the switching transistor. At this time, a control signal output of an AND gate becomes a logic "0", but an actual signal voltage does not become completely "0", but even when a comparator is erroneously operated, the switching transistor is completely cut off by the comparator, and hence no current flows to the injector, and a small current continuously does not flow to the injector to prevent a valve closing force from being weakened.
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patent: 4605983 (1986-08-01), Harvey
patent: 4612597 (1986-09-01), Hamren
patent: 4944281 (1990-07-01), Suquet
patent: 5053911 (1991-10-01), Kopec et al.
patent: 5216994 (1993-06-01), Aoki et al.
patent: 5277163 (1994-01-01), Ohishi
patent: 5285345 (1994-02-01), Blumel et al.
patent: 5341032 (1994-08-01), Brambilla et al.
Fuji Jukogyo Kabushiki Kaisha
Wolfe Willis R.
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