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    • 4. 发明授权
    • Control system for direct fuel injection engine
    • 直喷式发动机控制系统
    • US06502541B2
    • 2003-01-07
    • US09941653
    • 2001-08-30
    • Matsuharu AboYoshiyuki TanabeKoji OnishiToshio IshiiHiroshi Fujii
    • Matsuharu AboYoshiyuki TanabeKoji OnishiToshio IshiiHiroshi Fujii
    • F02B1700
    • F02D13/0219F02B17/005F02B23/104F02B2031/006F02B2075/125F02B2275/18F02D13/0207F02D13/0257F02D13/0261F02D13/0269F02F1/4214F02F3/26F02F2001/245F02M61/162F02M61/1806Y02T10/123Y02T10/142Y02T10/146Y02T10/18
    • The invention provide a control system for a direct fuel injection engine employing a valve varying mechanism, which can suppress mixing of burned gas and fresh air to maintain the combustion stability, can accelerate vaporization of sprayed fuel at the beginning of fuel injection to reduce the emission rate of HC, and can realize a reduction of NOx based on the effect of exhaust return. The control system for the direct fuel injection engine comprises a fuel injector. for directly injecting fuel into a combustion chamber, and valve varying drivers for variably controlling the opening/closing timing of each of an intake valve and/or an exhaust valve. A control unit controls the valve varying mechanism unit to introduce burned gas from an exhaust port into the combustion chamber and to inject the fuel during a compression stroke for effectuating stratified charge combustion. The control unit controls the valve varying drivers to provide a phase difference in the opening timing of two left and right valves constituting the intake valve and/or the exhaust valve, thereby generating a flow of the burned gas along a cylinder wall.
    • 本发明提供了一种采用阀门改变机构的直接燃油喷射发动机的控制系统,其可以抑制燃烧气体和新鲜空气的混合以保持燃烧稳定性,可以在燃料喷射开始时加速喷射燃料的蒸发以减少排放 HC的速率,并且可以基于排气返回的效果实现NOx的还原。 用于直接燃料喷射发动机的控制系统包括燃料喷射器。 用于将燃料直接喷射到燃烧室中,以及用于可变地控制进气门和/或排气阀中的每一个的打开/关闭正时的阀变化驱动器。 控制单元控制阀变化机构单元将来自排气口的燃烧气体引入燃烧室,并且在压缩冲程期间喷射燃料以实现分层充气燃烧。 控制单元控制阀变化驱动器以在构成进气门和/或排气门的两个左右阀门的打开正时中提供相位差,从而沿缸壁产生燃烧气体的流动。
    • 10. 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。