Apparatus and method for driving a piezoelectrically controlled

Details Apparatus and method for driving a piezoelectrically controlled Apparatus and method for driving a piezoelectrically controlled

1999-09-21

2000-08-29

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123491, 31031601, H01L 4104

Patent

active

061092452

ABSTRACT:
An apparatus for driving a piezoelectrically controlled fuel injection valve includes a piezoelectric actuator having a discharging device and preferably a power MOSFET switch connected in parallel therewith. The discharging device is turned on by a monitoring device that is likewise connected in parallel with the piezoelectric actuator if an opening time of the piezoelectric actuator exceeds a predetermined monitoring time. The discharging device and the monitoring device are constructed as an integrated circuit (ASIC) and are integrated in a valve housing. A method for operating the apparatus is also provided.

REFERENCES:
patent: 4732129 (1988-03-01), Takigawa et al.
patent: 5130598 (1992-07-01), Verbeyen et al.
patent: 5500565 (1996-03-01), Okubo
Japanese Patent Abstract No. 01041643 (Hidekazu), dated Feb. 13, 1989.

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