Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
Controller for cylinder injection type injectors
 A controller for cylinder injection type injectors is constructed so that current detection element for detecting currents flowing through injector coils are inserted between a connection point of first switching element and the nodes of reverse current blocking diodes and current commutation diodes, respectively, and over-current detection element do not include circuits for temporarily interrupting over-current detection operations based on output signals of over-excitation signal generation element. That is, the current detection element are arranged at paths not admitting the flow of over-excitation currents, so that power dissipations at the current detection element can be reduced. Further, the circuits for temporarily interrupting the operations of the over-current detection element while over-excitation currents are being supplied are dispensed with. As a result of these arrangements, the present invention can provide a small-sized, lightweight and inexpensive controller capable of detecting over-currents in a wide range. 
Mitsubishi Denki Kabushiki Kaisha
F F
F02D F02D
inventional additional
Tetsushi Manabu
Watanabe Yamashita