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1.发明授权公开(公告)号：US12203425B2
公开(公告)日：2025-01-21
申请号：US18160757
申请日：2023-01-27
Applicant: Cummins Inc.
Inventor： Jalal Syed , Donald J. Benson , David Michael Carey , Sanjay Manglam
Abstract: The present invention provides a method for analyzing and optimizing the injection of fluid into an internal combustion engine via a common rail system. Once various injection parameters are determined for a given injection system, these data may be used to model the effect of sequential injection events for the system. A processer can then be used to run the model and to adjust sequential fuel injection events to optimize engine performance and fuel usage.
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公开(公告)号：US11781500B2
公开(公告)日：2023-10-10
申请号：US17954615
申请日：2022-09-28
Applicant: Cummins Inc.
Inventor： Tommy J. Albing , David Michael Carey
CPC classification number: F02D41/3845 , F02D41/2467 , F02D2041/2055 , F02D2041/225 , F02D2200/0602 , F02D2200/0606 , F02D2250/31
Abstract: A method is disclosed of controlling operation of a fuel injector in response to measuring a quantity of fuel injected by the fuel injector from a fuel accumulator to an engine cylinder during operation of a fuel pump that delivers fuel to the accumulator, comprising: determining an average pressure of the fuel accumulator during a first time period before a fuel injection event; predicting a mass of fuel delivered to the fuel accumulator during a pumping event (Qpump); determining an average pressure of the fuel accumulator during a second time period after the fuel injection event; estimating a leakage of fuel; computing the injected fuel quantity by adding the average pressure during the first time period to Qpump, and subtracting the average pressure during the second time period and the leakage; and using the computed injected, fuel quantity to control operation of the fuel injector.
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公开(公告)号：US11852097B2
公开(公告)日：2023-12-26
申请号：US17790430
申请日：2020-12-30
Applicant: Cummins Inc.
Inventor： David Michael Carey , Sanjay Manglam
CPC classification number: F02D41/403 , F02D41/20 , F02D41/3818 , F02D41/402 , F02D41/405 , F02M65/001 , F02M65/003 , F02D2041/224 , F02D2200/0602 , F02D2200/0612 , F02D2200/0614
Abstract: Various embodiments of the present disclosure relate to methods and systems for measuring an injected fuel quantity during multipulse injection events in a common rail of a fuel system including a fuel pump to supply fuel to the common rail. The method, using a control unit, determines if each of the multipulse injection events in a normal operating condition includes a pilot pulse; in response to determining that the pilot pulse is included, obtaining an enforced separation value between the pilot pulse and the main pulse to emulate a single-pulse injection; while the fuel pump is temporarily shut off, performing a temporary enforced separation on a fraction of the multipulse injection events; measuring a pressure change in the common rail during the temporary enforced separation; and resuming the normal operating condition of the multipulse injection events after the pressure change is measured.
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4.发明申请公开(公告)号：US20220252018A1
公开(公告)日：2022-08-11
申请号：US17630466
申请日：2019-08-02
Applicant: Cummins Inc.
Inventor： Paul Peavler , Donald J. Benson , David Michael Carey , Timothy J. Viola
Abstract: The present disclosure relates to a method for controlling pressure of an engine, including a controller structured to implement the method and an engine system including the controller. More specifically, the present disclosure relates to a method based on a mass balance analysis of a fuel system to determine how much mass needs to be pumped to maintain or achieve a certain pressure for the engine. In some embodiments, the method analyzes how much mass can be pumped by each pumping event based on current engine conditions. The analysis is performed over the smallest repeatable pump events and cylinder events cycle, or “subcycle,” based on the number of pump events and cylinder events for a given engine configuration.
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公开(公告)号：US20210156332A1
公开(公告)日：2021-05-27
申请号：US17046969
申请日：2018-04-10
Applicant: Tommy J. Albing , David Michael Carey , Cummins Inc.
Inventor： Tommy J. Albing , David Michael Carey
Abstract: A method is disclosed of controlling operation of a fuel injector in response to measuring a quantity of fuel injected by the fuel injector from a fuel accumulator to an engine cylinder during operation of a fuel pump that delivers fuel to the accumulator, comprising: determining an average pressure of the fuel accumulator during a first time period before a fuel injection event; predicting a mass of fuel delivered to the fuel accumulator during a pumping event (Qpump); determining an average pressure of the fuel accumulator during a second time period after the fuel injection event; estimating a leakage of fuel; computing the injected fuel quantity by adding the average pressure during the first time period to Qpump, and subtracting the average pressure during the second time period and the leakage; and using the computed injected fuel quantity to control operation of the fuel injector.
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Patent Agency Ranking
公开(公告)号：US20190360888A1
公开(公告)日：2019-11-28
申请号：US16477445
申请日：2017-12-27
Applicant: Cummins Inc.
Inventor： David Michael Carey , Shounak Mishra , Zachary L. Anslinger , Sarah E. Gnau , Srinivas K. Mulukutla , Edward Nathan Linen
Abstract: A method for identifying a source of high pressure leakage of a fuel system of an engine comprising determining pressure decay values at a first pressure and at a second pressure and identifying the source of high pressure leakage based on the pressure decay values at each pressure.
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公开(公告)号：US12146449B2
公开(公告)日：2024-11-19
申请号：US17909933
申请日：2021-05-06
Applicant: Cummins Inc.
Inventor： Mayur H. Borate , Srinivas Kumar Mulukutla , Shailesh Nair , David Michael Carey , Syed Shah Jalal
Abstract: At least some embodiments of present disclosure direct to a fuel injection timing drift detection and/or compensation system. In some cases, the system collects or receives a series of fuel pressure data measured by one or more fuel pressure sensors. The system is configured to receive an indication of fuel flow cutout and a start-of-injection command signal. The system calculates a set of pressure drops using the series of fuel pressure data and identifies a selected pressure drop greater than a predetermined threshold to determine a measured start-of-injection timing based on the selected pressure drop. The system is further configured to evaluate whether a fuel injection drifting occurs based on received start-of-injection command signal and the measured start-of-injection timing. In some cases, the fuel injection drifting is used to either compensate fuel injection timing or raise a flag indicating the drifting.
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公开(公告)号：US11499495B2
公开(公告)日：2022-11-15
申请号：US17508475
申请日：2021-10-22
Applicant: Cummins Inc.
Inventor： Tommy J. Albing , David Michael Carey
Abstract: A method is disclosed of controlling operation of a fuel injector in response to measuring a quantity of fuel injected by the fuel injector from a fuel accumulator to an engine cylinder during operation of a fuel pump that delivers fuel to the accumulator, comprising: determining an average pressure of the fuel accumulator during a first time period before a fuel injection event; predicting a mass of fuel delivered to the fuel accumulator during a pumping event (Qpump); determining an average pressure of the fuel accumulator during a second time period after the fuel injection event; estimating a leakage of fuel; computing the injected fuel quantity by adding the average pressure during the first time period to Qpump, and subtracting the average pressure during the second time period and the leakage; and using the computed injected fuel quantity to control operation of the fuel injector.
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公开(公告)号：US11162450B2
公开(公告)日：2021-11-02
申请号：US17046969
申请日：2018-04-10
Applicant: Cummins Inc. , Tommy J. Albing , David Michael Carey
Inventor： Tommy J. Albing , David Michael Carey
Abstract: A method is disclosed of controlling operation of a fuel injector in response to measuring a quantity of fuel injected by the fuel injector from a fuel accumulator to an engine cylinder during operation of a fuel pump that delivers fuel to the accumulator, comprising: determining an average pressure of the fuel accumulator during a first time period before a fuel injection event; predicting a mass of fuel delivered to the fuel accumulator during a pumping event (Qpump); determining an average pressure of the fuel accumulator during a second time period after the fuel injection event; estimating a leakage of fuel; computing the injected fuel quantity by adding the average pressure during the first time period to Qpump, and subtracting the average pressure during the second time period and the leakage; and using the computed injected fuel quantity to control operation of the fuel injector.
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公开(公告)号：US20210071612A1
公开(公告)日：2021-03-11
申请号：US16772096
申请日：2017-12-14
Applicant: Cummins Inc.
Inventor： David Michael Carey , Jalal Syed , Richard J. Dudek , Ulf Carlsson
Abstract: Methods and systems, using a controller (20), for performing fuel pressure control operation of an engine (12) having at least one cylinder (16) is disclosed. The controller (20) includes a fuel system control unit (42) configured to control a fuel pressure applied to at least one injector (18) of the engine (12) during a motoring condition period (412) based on a commanded pulse train duration (410). During the motoring condition period (412), no combustion occurs in the at least one cylinder (16) of the engine (12). The commanded pulse train duration is a time period during which the at least one injector (18) of the engine (12) is activated for a drain operation. The fuel system control unit (42) is configured to command the at least one injector (18), for the commanded pulse train duration during the motoring condition period (412), to release fuel from the at least one injector (18) without injecting the fuel into the at least one cylinder (16) of the engine (12).
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