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11.发明申请公开(公告)号：US20250137417A1
公开(公告)日：2025-05-01
申请号：US18495690
申请日：2023-10-26
Applicant: Cummins Inc.
Inventor： Shailesh Nair , Mayur H. Borate , Srinivas Kumar Mulukutla , Panendra Kumar Sahu , David Michael Carey
Abstract: A pressure-based piston top-dead-center (“TDC”) position measurement system is disclosed, comprising: a fuel injector configured to inject fuel into a combustion chamber bounded in part by the piston; and a controller configured to control the fuel injector to cause a fuel injection when the piston is at each of a plurality of different positions relative to TDC while ensuring fuel is provided to the fuel injector at a substantially constant pressure. The controller is further configured to estimate a pressure in the combustion chamber in response to each fuel injection, fit a curve to the estimated pressures, and determine a TDC position of the piston as correlating with a maximum pressure on the curve.
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12.发明授权公开(公告)号：US12146451B2
公开(公告)日：2024-11-19
申请号：US18513778
申请日：2023-11-20
Applicant: Cummins Inc.
Inventor： David Michael Carey , Sanjay Manglam
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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公开(公告)号：US20240200504A1
公开(公告)日：2024-06-20
申请号：US17909933
申请日：2021-05-06
Applicant: Cummins Inc.
Inventor： Mayur H. Borate , Srinivas Kumar Mulukutia , Shailesh Nair , David Michael Carey , Syed Shah Jalal
CPC classification number: F02D41/221 , F02D41/009 , F02D41/401 , F02D2041/224 , F02D2041/228 , F02D2200/0602 , F02D2200/0618
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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14.发明公开公开(公告)号：US20230279823A1
公开(公告)日：2023-09-07
申请号：US17790430
申请日：2020-12-30
Applicant: Cummins Inc.
Inventor： David Michael Carey , Sanjay Manglam
CPC classification number: F02D41/403 , F02D41/405 , F02D41/20 , F02D41/3818 , F02D2200/0602
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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公开(公告)号：US20230015452A1
公开(公告)日：2023-01-19
申请号：US17954615
申请日：2022-09-28
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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Patent Agency Ranking
公开(公告)号：US20210396192A1
公开(公告)日：2021-12-23
申请号：US17466128
申请日：2021-09-03
Applicant: Cummins Inc.
Inventor： Tommy J. Albing , David Michael Carey
Abstract: A method of adaptively predicting, during operation of a pump, a mass of fuel pumped by the pump during a pumping event to a fuel accumulator (“Qpump”) to control operation of the pump is provided, comprising: generating an adaptive model of operation of the pump, including estimating a start of pumping (“SOP”) position of a plunger of the pump, estimating Qpump, determining a converged value of the estimated SOP position, and determining a converged value of the estimated Qpump; using the adaptive model to predict Qpump by inputting to the model the converged value of the estimated SOP position, a measured pressure of fuel in the fuel accumulator and a measured temperature of fuel in the fuel accumulator; and controlling operation of the pump in response to the predicted Qpump.
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17.发明公开公开(公告)号：US20240084757A1
公开(公告)日：2024-03-14
申请号：US18513778
申请日：2023-11-20
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
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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18.发明授权公开(公告)号：US11725604B2
公开(公告)日：2023-08-15
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
CPC classification number: F02D41/22 , F02D41/3836 , F02D41/3845 , F02D2041/225 , F02D2200/0602
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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19.发明公开公开(公告)号：US20230175452A1
公开(公告)日：2023-06-08
申请号：US18160757
申请日：2023-01-27
Applicant: Cummins Inc.
Inventor： Jalal Syed , Donald J. Benson , David Michael Carey , Sanjay Manglam
CPC classification number: F02D41/3809 , F02D41/3818 , F02D41/401 , F02D41/403
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：US11486326B2
公开(公告)日：2022-11-01
申请号：US17466128
申请日：2021-09-03
Applicant: Cummins Inc.
Inventor： Tommy J. Albing , David Michael Carey
Abstract: A method of adaptively predicting, during operation of a pump, a mass of fuel pumped by the pump during a pumping event to a fuel accumulator (“Qpump”) to control operation of the pump is provided, comprising: generating an adaptive model of operation of the pump, including estimating a start of pumping (“SOP”) position of a plunger of the pump, estimating Qpump, determining a converged value of the estimated SOP position, and determining a converged value of the estimated Qpump; using the adaptive model to predict Qpump by inputting to the model the converged value of the estimated SOP position, a measured pressure of fuel in the fuel accumulator and a measured temperature of fuel in the fuel accumulator; and controlling operation of the pump in response to the predicted Qpump.
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