公开(公告)号：US20090071438A1

公开(公告)日：2009-03-19

申请号：US12230439

申请日：2008-08-28

Applicant: Masataka Shiraishi ,  Yoshitaka Kakuhama ,  Kei Sakai ,  Yosuke Kitamura

Inventor： Masataka Shiraishi ,  Yoshitaka Kakuhama ,  Kei Sakai ,  Yosuke Kitamura

IPC: F02D9/08 ,  F02D41/14

CPC classification number: F02D41/0007 ,  F02B37/00 ,  F02B2275/14 ,  F02D19/022 ,  F02D19/024 ,  F02D19/027 ,  F02D31/002 ,  F02D41/0027 ,  F02D41/06 ,  F02M21/0236 ,  F02M21/0275 ,  F02M21/0284 ,  F02M21/047 ,  F02N2300/102 ,  Y02T10/144 ,  Y02T10/32

Abstract: A method and device for controlling starting of a gas engine is proposed which is superior in starting performance and improved in load responsivity while maintaining air fuel ratio control.There are provided a starting operation mode in which fuel gas flow is controlled by the fuel gas flow control valve based on actual mixture flow rate and adequate excess air ratio prescribed for each of detected values of operating conditions of the engine and then mixture flow is controlled by the throttle valve so that engine rotation speed approaches a target rotation speed, and a normal operation mode in which fuel gas flow is controlled by the fuel gas flow control valve so that engine rotation speed approaches the target rotation speed and then mixture flow rate is controlled by the throttle valve so that air fuel ratio of the mixture coincides with an adequate value prescribed for each of detected values of operating conditions of the gas engine with the fuel gas flow flowing at the commanded fuel gas flow rate, and a switchover rotation speed is predetermined so that operation mode is switched from starting mode to normal mode when engine speed reaches the switchover rotation speed.

Abstract translation: 提出了一种用于控制燃气发动机启动的方法和装置，其在启动性能方面优异，并且在保持空燃比控制的同时提高了负载响应性。 提供了一种启动操作模式，其中燃料气体流量由燃料气体流量控制阀基于实际混合流量和针对发动机的操作条件的每个检测值规定的足够的过量空气比来控制，然后控制混合流量 通过节流阀使发动机转速接近目标转速，以及通过燃料气体流量控制阀控制燃料气体流量使得发动机转速接近目标转速，然后混合流量为 由所述节流阀控制，使得所述混合物的空燃比与以所述燃料气体流量流动的所述燃料气体流量的所述燃气发动机的操作条件的每个检测值规定的适当值一致，以及切换转速 是预定的，当发动机速度达到切换旋转时，操作模式从起动模式切换到正常模式 速度。

公开(公告)号：US20090076708A1

公开(公告)日：2009-03-19

申请号：US12230449

申请日：2008-08-28

Applicant: Masataka Shiraishi ,  Yoshitaka Kakuhama ,  Kei Sakai ,  Yosuke Kitamura

Inventor： Masataka Shiraishi ,  Yoshitaka Kakuhama ,  Kei Sakai ,  Yosuke Kitamura

IPC: F02D41/00

CPC classification number: F02D31/007 ,  F02D41/0007 ,  F02D41/0025 ,  F02D41/18 ,  F02D2041/0022 ,  F02D2041/1409 ,  F02D2041/1419 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02D2250/32

Abstract: An integrative control method and device for controlling gas engines is proposed which is improved load responsivity of the engine in transient operation. The control method comprises a speed control process for controlling engine rotation speed by controlling the fuel gas flow control valve based on deviation of actual engine rotation speed from a target command value of rotation speed, and an air fuel ratio control process for controlling air fuel ratio of fuel-air mixture by controlling throttle valve opening based on deviation of the actual mixture flow rate from the command value of mixture flow rate, whereby at least either fuel gas flow correction or fuel-air mixture flow correction is performed when time-series variation of input signals relating to performance change of the gas engine exceeds a reference range determined beforehand, the fuel gas flow correction being performed by correcting control variables of the fuel gas flow control valve in the speed control process, and the mixture flow correction being performed by correcting opening of the throttle valve in the air fuel ratio control process.

Abstract translation: 提出了一种用于控制燃气发动机的综合控制方法和装置，其在瞬时操作中改善了发动机的负载响应性。 该控制方法包括：通过基于实际发动机转速与目标转速值的偏差控制燃料气体流量控制阀来控制发动机转速的速度控制处理以及用于控制空燃比的空燃比控制处理 通过根据实际混合流量与混合流量的指令值的偏差来控制节气门开度，从而当时间序列变化时执行至少一种燃料气体流量校正或燃料 - 空气混合物流量校正 与气体发动机的性能变化相关的输入信号超过预先确定的参考范围，通过在速度控制过程中校正燃料气体流量控制阀的控制变量来执行燃料气体流量校正，并且混合流量校正由 在空燃比控制处理中校正节流阀的打开。