公开(公告)号：US10107170B2

公开(公告)日：2018-10-23

申请号：US15350455

申请日：2016-11-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Giovanni David ,  Marco Iacovone

IPC: F01N11/00 ,  F01N3/20 ,  G01F23/296 ,  G01F25/00

Abstract: A method for monitoring the reductant quantity in a reservoir method is provided. The reductant is stored within the reservoir for use within an exhaust gas treatment system of a vehicle, and the reservoir comprises an acoustic sensor disposed within the reductant and capable of generating signals relating to the volume of reductant within the reservoir. The method includes generating a first signal for validation after a system wakeup, conducting a wakeup validation using a wakeup condition, wherein the wakeup condition includes determining if the first signal is within a first accuracy threshold relative to a validated signal generated during the previous operating cycle; and conducting a secondary validation for a signal generated after the first signal using one or more secondary validation conditions. The method can further comprise conducting one or more subsequent validations for one or more signals generated after the first signal.

公开(公告)号：US20180135494A1

公开(公告)日：2018-05-17

申请号：US15350455

申请日：2016-11-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Giovanni David ,  Marco Iacovone

IPC: F01N11/00 ,  G01F23/296 ,  G01F25/00 ,  F01N3/20

CPC classification number: F01N11/00 ,  F01N3/206 ,  F01N3/2066 ,  F01N11/002 ,  F01N2610/02 ,  F01N2610/1406 ,  F01N2900/1814 ,  G01F23/296 ,  G01F25/0061

Abstract: A method for monitoring the reductant quantity in a reservoir method is provided. The reductant is stored within the reservoir for use within an exhaust gas treatment system of a vehicle, and the reservoir comprises an acoustic sensor disposed within the reductant and capable of generating signals relating to the volume of reductant within the reservoir. The method includes generating a first signal for validation after a system wakeup, conducting a wakeup validation using a wakeup condition, wherein the wakeup condition includes determining if the first signal is within a first accuracy threshold relative to a validated signal generated during the previous operating cycle; and conducting a secondary validation for a signal generated after the first signal using one or more secondary validation conditions. The method can further comprise conducting one or more subsequent validations for one or more signals generated after the first signal.

公开(公告)号：US09719398B2

公开(公告)日：2017-08-01

申请号：US14332069

申请日：2014-07-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Giovanni David ,  Igor Zanetti

IPC: G01N25/12 ,  G01N25/36 ,  G01N25/46 ,  G01N25/48 ,  G01N25/28 ,  F01N11/00 ,  G01K13/00 ,  G01K3/10

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.

公开(公告)号：US20150032391A1

公开(公告)日：2015-01-29

申请号：US14446060

申请日：2014-07-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Igor Zanetti ,  Giovanni David

IPC: G01F23/00

CPC classification number: G01F23/0069 ,  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.

Abstract translation: 公开了一种用于检测罐中液面变化的控制装置。 控制装置包括连接到液位传感器的电子控制单元。 ECU被配置为监视代表罐中的液位的信号值; 使用第一滤波器对液位信号值进行滤波以获得第一滤波信号，并使用第二滤波器获得第二滤波信号，所述第一滤波器具有低于第二滤波器的时间常数（τ2）的时间常数（τ1） ; 计算第一滤波信号和第二滤波信号之间的差的积分值; 并且当所述积分值大于预定阈值时，产生表示所述罐中的液位增加的检测的信号。