Dynamic fuel injection control pressure set-point limits
    5.
    发明授权
    Dynamic fuel injection control pressure set-point limits 有权
    动态燃油喷射控制压力设定值限制

    公开(公告)号:US06973923B1

    公开(公告)日:2005-12-13

    申请号:US10894981

    申请日:2004-07-20

    IPC分类号: F02D41/38 F02M37/04 F02M57/02

    摘要: An internal combustion engine fuel system applies injection control pressure to fuel injectors (26) to force fuel into combustion chambers (28). A processor of a control system (22) develops data values for injection control pressure set-point (ICPC—T13) representing desired injection control pressure and evaluates (134) the injection control pressure set-point data values for compliance with an allowable dynamic range defined by a data value for a minimum dynamic limit correlated with engine speed (N) from a function generator (132) and a data value for a maximum dynamic limit correlated with engine temperature (EOT) from a function generator (130). The processor limits the data value of desired injection control pressure that is subsequently processed to control injection control pressure applied by the fuel system to the fuel injectors to the allowable dynamic range.

    摘要翻译: 内燃机燃料系统向燃料喷射器(26)施加喷射控制压力以迫使燃料进入燃烧室(28)。 控制系统(22)的处理器开发表示期望的喷射控制压力的喷射控制压力设定点(ICPC < - > T13)的数据值,并评估(134)喷射控制压力设定值数据值 用于符合由功能发生器(132)的与发动机转速(N)相关的最小动态极限的数据值所规定的允许动态范围和与来自功能的发动机温度(EOT)相关的最大动态极限的数据值 发电机(130)。 处理器限制随后处理的期望喷射控制压力的数据值,以控制由燃料系统施加到燃料喷射器的喷射控制压力达到允许的动态范围。

    Map-scheduled gains for closed-loop control of fuel injection pressure
    6.
    发明授权
    Map-scheduled gains for closed-loop control of fuel injection pressure 有权
    燃油喷射压力闭环控制的地图预定增益

    公开(公告)号:US06850832B1

    公开(公告)日:2005-02-01

    申请号:US10692866

    申请日:2003-10-24

    摘要: A schedule (164, 166) correlates data values of closed-loop gain (KP, KI) with engine temperature values (EOT) and engine speed values (N). A control strategy develops a data value (ICPC_DES) representing desired injector control pressure (ICP) set-point, processes ICPC_DES and a data value (ICP_MPA) representing actual ICP to develop ICP error data value (ICP_ERR) for closed-loop P-I control (160, 162) of actual ICP. Data values for closed-loop proportional and integral gains are obtained from the schedule based on measured engine temperature and measured engine speed. ICP become less subject to undesirable fluctuations that might otherwise change fuel injection quantity in ways detrimental to attainment of desired tailpipe emission objectives.

    摘要翻译: 时间表(164,166)将闭环增益(KP,KI)的数据值与发动机温度值(EOT)和发动机转速值(N)相关联。 控制策略开发表示所需喷射器控制压力(ICP)设定点的数据值(ICPC_DES),处理ICPC_DES和表示实际ICP的数据值(ICP_MPA),以开发用于闭环PI控制的ICP误差数据值(ICP_ERR) 160,162)。 基于测量的发动机温度和测量的发动机转速,从时间表中获得闭环比例和积分增益的数据值。 ICP变得更少受不期望的波动的影响,否则可能以不利于达到期望的排气管排放目标的方式改变燃料喷射量。