公开(公告)号：US11326504B2

公开(公告)日：2022-05-10

申请号：US16725303

申请日：2019-12-23

Applicant: Caterpillar Inc.

Inventor： Matthew T. Wolk ,  Samuel Were ,  James Mutti ,  Brian P. Brennan

IPC: F01P7/04 ,  F01P5/04 ,  F02M26/45 ,  F02B37/22 ,  F01P7/02 ,  F01P1/06

Abstract: A system including a cooling fan, an actuator with an actuator temperature sensor, and a controller is disclosed. The controller may be configured to receive temperature data from the actuator temperature sensor. The temperature data may include information relating to an actuator temperature of the actuator. The controller may be configured to compare the actuator temperature with a temperature threshold associated with the actuator, and control the cooling fan to adjust the actuator temperature based on determining that the actuator temperature satisfies the temperature threshold.

公开(公告)号：US20180080358A1

公开(公告)日：2018-03-22

申请号：US15273264

申请日：2016-09-22

Applicant: Caterpillar Inc.

Inventor： James S. Ulstad ,  Kranti K. Nellutla ,  Greg L. Armstrong ,  Steven Y. Tian ,  Brian P. Brennan ,  Sasidhar Rayasam ,  Anand KrishnamurthyGopalan

IPC: F01N3/20

CPC classification number: F01N3/206 ,  F01N3/023 ,  F01N9/002 ,  F01N2430/06 ,  F02D41/029 ,  F02D41/405 ,  Y02T10/44 ,  Y02T10/47

Abstract: An engine has an injector communicating with a combustion chamber to introduce a plurality of dosing shots to mix with exhaust gases and regenerate an aftertreatment device downstream of the combustion chamber. An apportionment strategy can apportion a per cylinder quantity, representing the quantity of dosing fuel to introduce per cylinder per combustion cycle, among a predefined number of dosing shots each having a first per shot quantity. The strategy compares the predefined number of dosing shots with a temporal dosing window to determine if predefined number of dosing shots can be conducted within the temporal dosing window. If so, the strategy proceeds to introduce the predefined number of dosing shots and if not, the strategy may recalculate a reduced number of dosing shots and reapportions a second per shot quantity.

公开(公告)号：US11698047B2

公开(公告)日：2023-07-11

申请号：US17349720

申请日：2021-06-16

Applicant: Caterpillar Inc.

Inventor： Xinyu Ge ,  Brian P. Brennan ,  James H. Mutti, Jr.

IPC: F02M26/50 ,  F02M26/23 ,  F02M26/33 ,  F02M26/49 ,  F02M26/53 ,  F02D41/00 ,  F02D41/14

CPC classification number: F02M26/50 ,  F02D41/0002 ,  F02D41/0055 ,  F02D41/0077 ,  F02D41/1446 ,  F02M26/23 ,  F02M26/33 ,  F02M26/49 ,  F02M26/53 ,  F02D2041/0017 ,  F02D2200/021

Abstract: A method for cleaning an exhaust gas recirculation (EGR) valve includes scheduling a cleaning for the EGR valve, and receiving a signal indicative of a temperature of exhaust gas produced with an internal combustion engine. The method may also include generating a command to actuate an intake throttle valve to a restrictive position to increase the temperature of the exhaust gas for cleaning the EGR valve, and generating a signal to repeatedly actuate the EGR valve.

公开(公告)号：US10794251B2

公开(公告)日：2020-10-06

申请号：US15273264

申请日：2016-09-22

Applicant: Caterpillar Inc.

Inventor： James S. Ulstad ,  Kranti K. Nellutla ,  Greg L. Armstrong ,  Steven Y. Tian ,  Brian P. Brennan ,  Sasidhar Rayasam ,  Anand KrishnamurthyGopalan

IPC: F01N3/20 ,  F02D41/40 ,  F01N3/023 ,  F01N9/00 ,  F02D41/02

Abstract: An engine has an injector communicating with a combustion chamber to introduce a plurality of dosing shots to mix with exhaust gases and regenerate an aftertreatment device downstream of the combustion chamber. An apportionment strategy can apportion a per cylinder quantity, representing the quantity of dosing fuel to introduce per cylinder per combustion cycle, among a predefined number of dosing shots each having a first per shot quantity. The strategy compares the predefined number of dosing shots with a temporal dosing window to determine if predefined number of dosing shots can be conducted within the temporal dosing window. If so, the strategy proceeds to introduce the predefined number of dosing shots and if not, the strategy may recalculate a reduced number of dosing shots and reapportions a second per shot quantity.

公开(公告)号：US10711726B2

公开(公告)日：2020-07-14

申请号：US15803049

申请日：2017-11-03

Applicant: Caterpillar Inc.

Inventor： James Steven Ulstad ,  Ye Tian ,  Purvarag S. Shah ,  Kranti Kumar Nellutla ,  Sasidhar Rayasam ,  Brian P. Brennan ,  Purna Chandra Sekhar Mokkarala ,  Mohammed Rafi H ,  Gregory Lance Armstrong

IPC: F02D41/38 ,  F02D19/02

Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a fuel rail, a pressure sensor, a relief valve, and a controller. The controller is configured to receive a signal indicative of a fuel rail pressure, identify exceeding of the fuel rail pressure beyond a first threshold, identify the fuel rail pressure drop below a second threshold, and initiate a counter for a first predefined amount of time accordingly. The controller is also configured to identify if the fuel rail pressure drops below a third threshold within the first predefined amount of time, and identify if the fuel rail pressure remains below the third threshold for at least a second predefined amount of time. The controller is further configured to determine an open status of the relief valve based, at least in part, on the identification.

公开(公告)号：US20190136787A1

公开(公告)日：2019-05-09

申请号：US15803049

申请日：2017-11-03

Applicant: Caterpillar Inc

Inventor： James Steven Ulstad ,  Ye Tian ,  Purvarag S. Shah ,  Kranti Kumar Nellutla ,  Sasidhar Rayasam ,  Brian P. Brennan ,  Purna Chandra Sekhar Mokkarala ,  Mohammed Rafi H ,  Gregory Lance Armstrong

IPC: F02D41/38

CPC classification number: F02D41/3863 ,  F02D19/022 ,  F02D41/3845 ,  F02D2200/0602

Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a fuel rail, a pressure sensor, a relief valve, and a controller. The controller is configured to receive a signal indicative of a fuel rail pressure, identify exceeding of the fuel rail pressure beyond a first threshold, identify the fuel rail pressure drop below a second threshold, and initiate a counter for a first predefined amount of time accordingly. The controller is also configured to identify if the fuel rail pressure drops below a third threshold within the first predefined amount of time, and identify if the fuel rail pressure remains below the third threshold for at least a second predefined amount of time. The controller is further configured to determine an open status of the relief valve based, at least in part, on the identification.