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    • 4. 发明授权
    • Fuel injector and internal combustion engine
    • 燃油喷射器和内燃机
    • US06571773B1
    • 2003-06-03
    • US09628717
    • 2000-07-28
    • Makoto YamakadoYoshiyuki TanabeToshio TakahataHiromasa KuboYasunaga HamadaYoshio OkamotoYuzo Kadomukai
    • Makoto YamakadoYoshiyuki TanabeToshio TakahataHiromasa KuboYasunaga HamadaYoshio OkamotoYuzo Kadomukai
    • F02M5100
    • F02D41/20F02D2041/2058F02D2200/503
    • The target peak current value, where a current value is reduced in conformity to a drop in the voltage of a battery 18 is stored in target peak current storage unit 68. ON-signals are sent from current control circuit 56 to power transistor 50 in response to the injection command pulse coming from engine controller 58 so that current is applied to coil 20. Then, the current flowing to coil 20 is detected by the current detecting resistor 52. Comparator 62 compares this detected current and the target peak current value read from the target peak current storage unit 68 conforming to the voltage of battery 18. If agreement is found between these two values, OFF-signals are sent to power transistor 50 from current control circuit 56 in response to the switching command coming from comparator 62. Then, On/Off signals to effect holding of the coil 20 are sent from current control circuit 56 to power transistor 50. The linearity of the injection volume despite changes in battery voltage can be maintained.
    • 目标峰值电流值,其当前值根据电池18的电压下降而减小存储在目标峰值电流存储单元68中。接通信号从电流控制电路56发送到功率晶体管50以作出响应 到来自发动机控制器58的喷射命令脉冲,使得电流被施加到线圈20.然后,流过线圈20的电流由电流检测电阻器52检测。比较器62将该检测到的电流与从 目标峰值电流存储单元68符合电池18的电压。如果在这两个值之间达成一致,则响应于来自比较器62的切换命令,将OFF信号从电流控制电路56发送到功率晶体管50.然后 ,用于实现线圈20的保持的开/关信号从电流控制电路56发送到功率晶体管50.尽管电池电压的变化,注入体积的线性可以 保持。