초록 ▼

A solenoid driving apparatus includes at least two solenoids of which driving periods do not overlap, a driving unit for driving each solenoid, and a signal generating unit for giving the driving unit a control signal information of each solenoid. The driving unit includes circuit sections jointly u

A solenoid driving apparatus includes at least two solenoids of which driving periods do not overlap, a driving unit for driving each solenoid, and a signal generating unit for giving the driving unit a control signal information of each solenoid. The driving unit includes circuit sections jointly used with regard to the driving of each solenoid, and drives each solenoid based on the control signal information corresponding to each solenoid. The signal generating unit generates the control signal information of each solenoid which is given to the driving unit based on the drive pulse signal corresponding to each solenoid. Also, while a control signal information is given to the driving unit based on the drive pulse signal corresponding to one solenoid, the signal generating unit does not accept the input of any drive pulse signal even when a drive pulse corresponding to the other solenoid is generated by a noise. Thereby, malfunctions and adverse effects on the driving apparatus due to the simultaneous use of common circuit sections of the driving unit for driving more than one solenoid can be prevented.

대표청구항 ▼

[ What is claimed is:] [1.] A solenoid driving apparatus comprising:at least two solenoids of which driving periods do not overlap;driving means, responsive to control signal informations corresponding to the solenoids respectively, for driving each of the solenoids based on a corresponding control

[ What is claimed is:] [1.] A solenoid driving apparatus comprising:at least two solenoids of which driving periods do not overlap;driving means, responsive to control signal informations corresponding to the solenoids respectively, for driving each of the solenoids based on a corresponding control signal information, said driving means including at least one circuit section shared for driving each of said solenoids; andsignal generating means, responsive to drive pulse signals corresponding to the solenoids respectively, for generating the control signal information for each of the solenoids based on a corresponding drive pulse signal and giving the control signal information to said driving means, said signal generating means rejecting an input of any drive pulse signal corresponding to another solenoid while the control signal information is given to said driving means based on the drive pulse signal corresponding to one solenoid. [15.] The solenoid driving apparatus of claim 1, wherein said solenoids are solenoids of fuel injection valves provided in an internal combustion engine. A solenoid driving apparatus comprising:a solenoid;signal generating means, responsive to a drive pulse signal, for giving a starting period signal for regulating a starting period, a holding period signal for regulating a holding period following the starting period, and an inverse excitation signal for regulating an inverse excitation period following the holding period, said signal generating means prohibiting any output of the starting period signal during an output of the inverse excitation signal; anddriving means, responsive to the starting period signal, holding period signal and inverse excitation signal from said signal generating means, for impressing a high voltage to said solenoid while the starting period signal is given, supplying a holding current to said solenoid while the holding period signal is given, and impressing an inverse voltage to said solenoid while the inverse excitation signal is given. The solenoid driving apparatus of claim 16, wherein said signal generating means comprises;starting period signal outputting means, responsive to the drive pulse signal and the inverse excitation signal, for outputting the starting period signal for a first prescribed time period from a start of the driving signal and prohibiting the output of any starting period signal while the inverse excitation signal is outputted;holding period signal outputting means, responsive to the drive pulse signal and the starting period signal, for outputting the holding period signal for a period between an end of the starting period signal and an end of the drive pulse signal; andinverse excitation signal outputting means, responsive to the holding period signal, for outputting the inverse excitation signal for a second prescribed time period from an end of the holding period signal. The solenoid driving apparatus of claim 17, wherein said starting period signal outputting means comprises;first gate means for inputting the drive pulse signal and the inverse excitation signal, giving a predetermined output responding to the drive pulse signal when the inverse excitation signal is not outputted, and, when the inverse excitation signal is outputted, not giving the predetermined output while the inverse excitation signal is outputted even when the drive pulse is inputted;delaying means for inputting the predetermined output of said first gate means, and delaying the predetermined output of said first gate means by said first prescribed time period; andsecond gate means for inputting the drive pulse signal and the output of said delaying means, and outputting the starting period signal for the first prescribed time period from the start of the drive pulse signal. The solenoid driving apparatus of claim 17, wherein said holding period signal outputting means comprises;starting period end detecting means for inputting the starting period signal and outputting a starting period end signal indicating an end of the starting period signal; andoutputting means for inputting the drive pulse signal and the starting period end signal, and outputting the holding period signal for a period between the end of the starting period signal and the end of the drive pulse signal.