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    • 3. 发明授权
    • Procedure for metering a reagent and device for implementing the procedure
    • 计量用于实施该程序的试剂和装置的步骤
    • US08567181B2
    • 2013-10-29
    • US12432375
    • 2009-04-29
    • Frank Schweizer
    • Frank Schweizer
    • F01N3/00
    • F01N3/208F01N2610/02F01N2900/0408Y02T10/24
    • A procedure for metering a reagent into an exhaust duct of a combustion engine, which is required for a catalytic conversion of NOx in a SCR-catalyzer and a device for implementing the procedure are suggested. Determined is the difference between a calculated and a measured NOx-concentration each downstream after the SCR-catalyzer. The difference is compared to a difference threshold. After an exceeding of the difference threshold a lowering of the metering rate on to a sinking metering rate is undertaken, which is higher than zero. After a waiting time, a comparison of the calculated and the measured NOx-concentration is provided each downstream after the SCR-catalyzer. If the measured NOx-concentration is above the calculated NOx-concentration the metering rate is increased. If the measured NOx-concentration is below the calculated NOx-concentration the metering rate is lowered. The approach according to the invention enables an adaptation of the metering, at which it is ensured that a NOx-conversion can always take place.
    • 提出了将催化转化SCR催化剂中的NOx所需的内燃机的排气管中的试剂计量的程序和用于实施该方法的装置。 确定了SCR催化剂之后每个下游的计算值和测量的NOx浓度之间的差异。 将差异与差异阈值进行比较。 超过差异阈值后,进行计量率下降到下沉计量率,该值高于零。 在等待时间之后,在SCR催化器之后每下游提供计算的和测量的NOx浓度的比较。 如果测量的NOx浓度高于计算的NOx浓度,则计量率增加。 如果测量的NOx浓度低于计算的NOx浓度,则计量率降低。 根据本发明的方法使得可以适应计量,在该计量下,可以始终发生NOx转换。
    • 5. 发明授权
    • Method and device for regenerating an emission control system
    • 再生排放控制系统的方法和装置
    • US08028519B2
    • 2011-10-04
    • US12158899
    • 2006-12-13
    • Frank SchweizerStefan SchererGerd Hartmann
    • Frank SchweizerStefan SchererGerd Hartmann
    • F01N3/10
    • F01N3/0871B01D53/9481B01D53/9495B01D2255/91F01N3/0842F01N2430/06F01N2610/03F02D41/0275F02D41/1441
    • The invention relates to a method for regenerating an emission control system of an internal combustion engine, comprising a storage catalytic converter, a first exhaust gas probe being situated in an exhaust gas tract upstream of the storage catalytic converter and a second exhaust gas probe being situated in a second exhaust gas tract downstream of the storage catalytic converter. A first output signal of a first exhaust gas probe and a second output signal of a second exhaust gas probe are supplied to an engine management system and the storage catalytic converter is regenerated by being exposed to a reductant in a regeneration phase. If the quantity of reductant is controlled by the engine management system during the regeneration phase, whereby said system detects the quantity of reductant that is present downstream of the storage catalytic converter by means of the second output signal of the second exhaust gas probe situated downstream of said converter, the charging of reductant can be significantly reduced with respect to an optimised dosage. Excess consumption of fuel or reductant as a result of the regeneration of the storage catalytic converter is minimised. In addition, the method improves the emission values, thus significantly contributing to the maintenance of emission limits.
    • 本发明涉及一种用于再生内燃机的排放控制系统的方法,包括:存储催化转化器,位于所述储存催化转化器上游的废气道中的第一排气探针和位于 在存储催化转化器的下游的第二废气道中。 第一排气探针的第一输出信号和第二排气探头的第二输出信号被提供给发动机管理系统,并且通过在再生阶段暴露于还原剂来再生储存催化转化器。 如果还原剂的量在再生阶段由发动机管理系统控制,则所述系统通过位于下游的第二废气探针的第二输出信号来检测存在于催化转化器下游的还原剂的量 所述转化器,相对于优化的剂量,还原剂的充电可以显着降低。 由于储存催化转化器的再生,燃料或还原剂的过量消耗被最小化。 此外,该方法提高了排放值,从而大大有助于维护排放限值。
    • 6. 发明申请
    • METHOD AND DEVICE FOR REGENERATING AN EMISSION CONTROL SYSTEM
    • 用于再现排放控制系统的方法和装置
    • US20090094962A1
    • 2009-04-16
    • US12158899
    • 2006-12-13
    • Frank SchweizerStefan SchererGerd Hartmann
    • Frank SchweizerStefan SchererGerd Hartmann
    • F01N9/00
    • F01N3/0871B01D53/9481B01D53/9495B01D2255/91F01N3/0842F01N2430/06F01N2610/03F02D41/0275F02D41/1441
    • The invention relates to a method for regenerating an emission control system of an internal combustion engine, comprising a storage catalytic converter, a first exhaust gas probe being situated in an exhaust gas tract upstream of the storage catalytic converter and a second exhaust gas probe being situated in a second exhaust gas tract downstream of the storage catalytic converter. A first output signal of a first exhaust gas probe and a second output signal of a second exhaust gas probe are supplied to an engine management system and the storage catalytic converter is regenerated by being exposed to a reductant in a regeneration phase. If the quantity of reductant is controlled by the engine management system during the regeneration phase, whereby said system detects the quantity of reductant that is present downstream of the storage catalytic converter by means of the second output signal of the second exhaust gas probe situated downstream of said converter, the charging of reductant can be significantly reduced with respect to an optimised dosage. Excess consumption of fuel or reductant as a result of the regeneration of the storage catalytic converter is minimised. In addition, the method improves the emission values, thus significantly contributing to the maintenance of emission limits.
    • 本发明涉及一种用于再生内燃机的排放控制系统的方法,包括:存储催化转化器,位于所述储存催化转化器上游的废气道中的第一排气探针和位于 在存储催化转化器的下游的第二废气道中。 第一排气探针的第一输出信号和第二排气探头的第二输出信号被提供给发动机管理系统,并且通过在再生阶段暴露于还原剂来再生储存催化转化器。 如果还原剂的量在再生阶段由发动机管理系统控制,则所述系统通过位于下游的第二排气探针的第二输出信号来检测存在于催化转化器下游的还原剂的量 所述转化器,相对于优化的剂量,还原剂的充电可以显着降低。 由于储存催化转化器的再生,燃料或还原剂的过量消耗被最小化。 此外,该方法提高了排放值,从而大大有助于维护排放限值。