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    Method and apparatus for controlling reductant injection into an exhaust gas feedstream from an internal combustion engine
    1.
    发明授权
    Method and apparatus for controlling reductant injection into an exhaust gas feedstream from an internal combustion engine 有权

    公开(公告)号：US10113464B2

    公开(公告)日：2018-10-30

    申请号：US15373031

    申请日：2016-12-08

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Giovanni David ,  Luca Lauritano ,  Giuseppe Antonio Spina

    IPC: F01N3/00 ,  F01N3/20 ,  F01N13/00 ,  F01N11/00

    Abstract: An exhaust aftertreatment system includes first and second selective catalytic reduction devices (SCRs) and a single reductant injection system. A total ammonia storage capacity and an ammonia storage level are determined for the first and second SCRs, and determine a total SCR ammonia storage level for the first and second SCRs based upon the ammonia storage level on the first and second SCRs. A first storage error is determined, and a second storage error is determined based upon an ammonia storage level and an ammonia storage capacity for the second SCR. A second reductant dosing rate is determined based upon the second storage error. The reductant injection system injects reductant into the exhaust gas feedstream based upon the second reductant dosing rate when the second storage error indicates an imbalance between the ammonia storage on the first SCR and the ammonia storage on the second SCR.

    Method for controlling an exhaust gas treatment system
    2.
    发明授权
    Method for controlling an exhaust gas treatment system 有权

    公开(公告)号：US10151229B2

    公开(公告)日：2018-12-11

    申请号：US15361730

    申请日：2016-11-28

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Thomas LaRose, Jr. ,  Giovanni David ,  Jose Marcelino Garcia

    IPC: F01N3/00 ,  F01N3/20 ,  F01N11/00 ,  F01N9/00 ,  F01N3/035

    Abstract: A method for controlling an exhaust gas treatment system is provided. The exhaust gas treatment system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction device, and a reductant supply source utilizing a volumetric pump. The exhaust gas source can include an internal combustion engine (ICE), such as a gasoline or diesel ICE. The method for controlling an exhaust gas treatment system includes commanding a reductant dosing quantity, determining a volumetric pump energizing time, determining an energizing time correction, and energizing the pump. The volumetric pump can comprise pump logic, and the volumetric pump energizing time can be determined by the pump logic. The energizing time correction can be determined using a calibration table. The calibration table can prescribe an energizing time correction based on a current pump pressure and the commanded dosing quantity.

    METHOD OF DETERMINING THE THERMAL STATE OF A SUBSTANCE IN COLD CONDITION
    6.
    发明申请
    METHOD OF DETERMINING THE THERMAL STATE OF A SUBSTANCE IN COLD CONDITION 有权
    确定冷藏物质热态的方法

    公开(公告)号：US20150016485A1

    公开(公告)日：2015-01-15

    申请号：US14332069

    申请日：2014-07-15

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Giovanni David ,  Igor Zanetti

    IPC: F01N11/00 ,  G01K13/00 ,  G01K3/08

    CPC classification number: F01N11/00 ,  G01K3/10 ,  G01K13/00 ,  G01K2205/00 ,  Y02T10/47

    Abstract: A method of determining a thermal state or a thermal state transition of a substance based on how much liquid phase is available is disclosed. The method includes: (a) determining a current thermal state of the substance when the internal combustion engine is switched on based on a tank temperature and on a time interval during which the engine is switched off; and (b) calculating a percentage of the liquid phase in case the thermal state is a mixture of solid phase and liquid phase based on a total mass of the substance in the tank, a heat amount supplied to the tank, a heat exchange of the tank with an external environment; and (c) detecting the thermal state transitions based on said tank temperature and its time derivative and on said percentage of the liquid phase.

    Abstract translation: 公开了一种基于多少液相可用来确定物质的热态或热状态转变的方法。 该方法包括：（a）基于油箱温度和发动机关闭的时间间隔确定当内燃机接通时物质的当前热状态; 和（b）在热状态是固相和液相的混合物的情况下计算液相的百分比，其基于罐中物质的总质量，供给到罐的热量，热交换量 坦克与外部环境; 和（c）基于所述罐温度及其时间导数和所述液相的百分比来检测热态转变。

    Control apparatus for detecting a variation of a fluid level in a tank
    7.
    发明授权
    Control apparatus for detecting a variation of a fluid level in a tank 有权

    公开(公告)号：US10352751B2

    公开(公告)日：2019-07-16

    申请号：US14446060

    申请日：2014-07-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Igor Zanetti ,  Giovanni David

    IPC: G01F23/00 ,  G01F23/74

    Abstract: A control apparatus for detecting a variation of a fluid level in a tank is disclosed. The control apparatus includes an Electronic Control Unit connected to the fluid level sensor. The ECU is configured to monitor a signal value representative of a fluid level in the tank; filter the fluid level signal value using a first filter to obtain a first filtered signal and using a second filter to obtain a second filtered signal, the first filter having a time constant (τ1) lower than a time constant (τ2) of the second filter; calculate an integral value of a difference between the first filtered signal and the second filtered signal; and generate a signal representative of the detection of an increase in the fluid level in the tank when the integral value is greater than a predefined threshold.

    Method of managing a selective catalytic reduction system of a motor vehicle
    10.
    发明授权
    Method of managing a selective catalytic reduction system of a motor vehicle 有权

    公开(公告)号：US10184376B2

    公开(公告)日：2019-01-22

    申请号：US15295410

    申请日：2016-10-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Mariano Nocereto ,  Raffaello Ardanese ,  Giovanni David

    IPC: F01N3/00 ,  F01N3/20 ,  F01N11/00

    Abstract: A method of managing a selective catalytic reduction system of a motor vehicle. During a first predetermined time period, a plurality of functionality checks of the sensor are performed for identifying if the sensor is able to provide a reliable measurement of the ammonia concentration. During the same first predetermined time period, a plurality of values of the ammonia concentration in the diesel exhaust fluid is measured by the sensor. A maintenance inducement strategy of the selective catalytic reduction system is activated if each of the values of the ammonia concentration measured during the first predetermined time period is smaller than a predetermined threshold value, and if each of the functionality checks of the sensor performed during the same first predetermined time period identifies that the sensor is able to provide a reliable measurement of the ammonia concentration.

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