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Method And Device For Determining A Reference Current Progression For A Fuel Injector, For Determining The Instant Of A Predetermined Opening State Of The Fuel Injector
Method And Device For Determining A Reference Current Progression For A Fuel Injector, For Determining The Instant Of A Predetermined Opening State Of The Fuel Injector
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机译:用于确定燃料喷射器的参考电流进程,确定燃料喷射器的预定打开状态的瞬时的方法和装置
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摘要
A method for determining a reference current curve for a fuel injector having a magnetic coil drive in an internal combustion engine of a motor vehicle includes: (a) applying a first voltage pulse to the magnetic coil drive to open the fuel injector, (b) applying a holding voltage to the magnetic coil drive to hold the fuel injector open, (c) switching off the holding voltage, (d) waiting for substantially no current to flow through the magnetic coil drive for a predetermined time period that is sufficiently short that the fuel injector remains open, (e) applying a second voltage pulse to the magnetic coil drive, and (f) recording a time-based curve of the current that flows through the magnetic coil drive during the second voltage pulse, which forms the reference current curve. This reference current curve is used for determining a time of a predetermined opening state of the fuel injector.
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