公开(公告)号：US11945401B2

公开(公告)日：2024-04-02

申请号：US17657589

申请日：2022-03-31

Applicant: Caterpillar Inc.

Inventor： Jay Venkataraghavan ,  Baoyong Liu ,  Urvish Joshi ,  Kevin Lloyd Dea

IPC: B60R25/10 ,  G07C5/08 ,  G08B29/04

CPC classification number: B60R25/101 ,  G07C5/0816 ,  G08B29/046

Abstract: A systems for detecting level sensor malfunction or tampering based on reductant consumption and determining when to initiate a quality check of reductant used in an aftertreatment system are disclosed. The system comprises a memory storing instructions and a processor executing the instructions to perform a process including: receiving dosing data associated with an amount of DEF supplied to the aftertreatment system; receiving tank level data from a level sensor in a DEF tank; comparing the dosing data with the tank level data; and based on the comparison: initiating, by the one or more processors, a quality check; and/or determining, by the one or more processors, a possible error requiring further diagnostics; and causing to present, by the one or more processors, an indication that the quality check is being initiated and/or that a possible error requires further diagnostics on a display.

公开(公告)号：US11781464B1

公开(公告)日：2023-10-10

申请号：US17657576

申请日：2022-03-31

Applicant: Caterpillar Inc.

Inventor： Frank Lombardi ,  Baoyong Liu ,  Urvish Joshi ,  Austin Bierle ,  Jay Venkataraghavan ,  Kent Anthony Schonert

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

CPC classification number: F01N11/00 ,  F01N3/208 ,  F01N9/005 ,  F01N9/007 ,  F01N11/007 ,  F01N2550/02 ,  F01N2550/05 ,  F01N2900/04 ,  F01N2900/0406 ,  F01N2900/0408 ,  F01N2900/0412 ,  F01N2900/06 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1602 ,  F01N2900/1614 ,  F01N2900/18 ,  F01N2900/1814

Abstract: A method for estimating a quality of reductant in an engine aftertreatment system for an engine using a virtual sensor, the method comprising: determining whether an enablement condition is met, wherein the enablement condition is one or more of: a reductant fill condition determined based on data received from one or more float sensors associated with the engine; a machine start condition determined based on machine speed data obtained from a speed sensor associated with the engine; and/or a rationality check condition determined based on data associated with a fault of one or more sensors associated with the engine; upon determining that the enablement condition is met, receiving NOx measurement data obtained from at least one NOx sensor; generating a reductant quality value based on the NOx measurement data; and outputting a reductant quality determination based on the reductant quality value.

公开(公告)号：US20170015201A1

公开(公告)日：2017-01-19

申请号：US14799659

申请日：2015-07-15

Applicant: Caterpillar Inc.

Inventor： Alexander C Crosman, III ,  Baoyong Liu ,  Joshua M Williams ,  Brett M Nee

IPC: B60L3/12 ,  G01L5/00 ,  B60L15/20 ,  G01N9/00

CPC classification number: B60L3/12 ,  B60L15/20 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2240/425 ,  B60L2250/10 ,  G01L5/13 ,  G01N9/00 ,  G01N9/26 ,  G01R31/00 ,  Y02T10/645 ,  Y02T10/7275

Abstract: A system for monitoring operation of a retarding grid associated with a traction motor of a machine includes a pressure sensor and a temperature sensor for measuring atmospheric pressure and temperature in real time. The system further includes a controller that determines a current air density on the basis of the measured atmospheric pressure and temperature. The controller then determines a threshold retarding power limit for the retarding grid on the basis of the current air density; and a threshold torque limit for the traction motor on the basis of the determined threshold retarding power limit and a current wheel speed of the machine. The controller determines a current retarding torque at the traction motor, and selectively generates a warning signal to an operator of the machine on the basis of the threshold torque limit determined for the traction motor and the current retarding torque at the traction motor.

Abstract translation: 用于监测与机器的牵引电动机相关联的延迟电网的操作的系统包括用于实时测量大气压力和温度的压力传感器和温度传感器。 该系统还包括基于测量的大气压力和温度来确定当前空气密度的控制器。 然后，控制器基于当前空气密度确定延迟电网的阈值延迟功率极限; 以及基于所确定的阈值延迟功率极限和机器的当前车轮速度的牵引电动机的阈值转矩极限。 控制器确定牵引电动机的当前延迟转矩，并且基于为牵引电动机确定的阈值转矩极限和牵引电动机的当前延迟转矩，选择性地向机器的操作者产生警告信号。