Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1994-01-19
1995-06-20
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
310317, F02D 4120, H01L 4108
Patent
active
054253438
ABSTRACT:
Piezoelectric element used in a fuel injection value is to be improved in its response to expansion and contraction, while the supply of an excess energy to the piezoelectric element is to be controlled. In a fuel injection control device in which an output voltage of the dc-dc converter is applied to a piezoelectric element via a choke coil and a thyristor, a current detection unit is provided between the dc-dc converter and the thyristor. A measured value of the electric charge, as found by integrating a charging current flowing through the current detection unit is compared by a comparator to a command value of electrical charges as found by processing the dc-dc converter output voltage. The results of comparison are supplied to a latch unit so as to be latched at the timing of a peak value of the charging current. A capacitor is charged and discharged depending on an output of the latch unit, and the terminal voltage across the capacitor and the output voltage of the dc-dc converter are compared to each other for controlling the output voltage of the dc-dc converter.
REFERENCES:
patent: 4621599 (1986-11-01), Igashira et al.
patent: 4644212 (1987-02-01), Moritugu et al.
patent: 4688536 (1987-08-01), Mitsuyasu et al.
patent: 4705003 (1987-11-01), Sakakibara et al.
patent: 4732129 (1988-03-01), Takigawa et al.
patent: 4767959 (1988-08-01), Sakakibara et al.
patent: 5053668 (1991-10-01), Mitsuyasu
patent: 5057734 (1991-10-01), Tsuzuki et al.
patent: 5130598 (1992-07-01), Verheyen et al.
Akaki Motonobu
Mitsuyasu Masaki
Oota Nobuyuki
Sawada Daisaku
Yamada Yasutoshi
Aisin Seiki Kabushiki Kaisha
Toyota Jidosha & Kabushiki Kaisha
Wolfe Willis R.
LandOfFree
Fuel injection control device for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuel injection control device for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel injection control device for internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1838926