公开(公告)号：US11660979B2

公开(公告)日：2023-05-30

申请号：US17142459

申请日：2021-01-06

Applicant: GM Global Technology Operations LLC

Inventor： Jun-mo Kang ,  Insu Chang

IPC: H01M4/02 ,  B60L58/21 ,  G01R31/367 ,  G01R31/387

CPC classification number: B60L58/21 ,  G01R31/367 ,  G01R31/387 ,  B60L2250/16

Abstract: A method and system for estimating state of charge of a lithium battery cell of a vehicle is provided. The method comprises providing a non-linear function of the lithium battery cell, a normalized lithium surface density and an actual voltage at a current of the lithium battery cell having an internal resistance. The method further comprises determining an actual lithium surface density based on the actual voltage relative to an inverse of the non-linear function. The method further comprises determining a varying parameter based on the actual lithium surface density relative to a first diffusion model. The method further comprises determining a predicted lithium surface density based on the varying parameter relative to a second diffusion model. The method further comprises determining an estimated state of charge of the lithium battery cell when a difference between the predicted and actual lithium surface densities is less than a first threshold.

公开(公告)号：US20230017485A1

公开(公告)日：2023-01-19

申请号：US17375491

申请日：2021-07-14

Applicant: GM Global Technology Operations LLC

Inventor： Taeyoung Han ,  Jun-mo Kang

IPC: G01R31/52 ,  H01M10/44 ,  G01R31/396 ,  H02J7/00

Abstract: A vehicle, system and method of detecting an internal short in a battery pack of the vehicle. The system includes a plurality of sensors and a processor. The plurality of sensors obtains states of charge at battery cells of the battery pack. The processor discharges the battery pack to identify a first set of the battery cells based on the states of charge of the battery cells, charges the battery pack to identify a second set of the battery cells based on the states of charge of the battery cells, and generates an alarm when an intersection of the first set and the second set is non-empty.

公开(公告)号：US20190293011A1

公开(公告)日：2019-09-26

申请号：US15927467

申请日：2018-03-21

Applicant: GM Global Technology Operations LLC

Inventor： Jun-mo Kang ,  Gregory P. Matthews ,  Martino A. Casetti

IPC: F02D41/00 ,  F02D41/24 ,  F02D41/14 ,  F02D41/02

Abstract: A method of operating a dedicated-EGR engine includes providing a rich air-fuel mixture to a dedicated cylinder; combusting the rich air-fuel mixture in the dedicated cylinder; modeling the combustion of the rich air-fuel mixture in the dedicated cylinder; estimating the composition of the combustion products in the dedicated cylinder based on interpolation of chemical reaction models of stoichiometric and rich combustion. The method further includes mixing the combustion products from the dedicated cylinder with air to produce an intake mixture; estimating a mass fraction of reformate and a mass fraction of burned gas in the intake mixture; providing the intake mixture to the intake ports of all of the cylinders of the dedicated-EGR engine; combusting an air-fuel mixture in a non-dedicated cylinder of the engine; and controlling an engine control parameter based on the estimated mass fractions of reformate and burned gas in the intake mixture.

公开(公告)号：US20190128233A1

公开(公告)日：2019-05-02

申请号：US15796019

申请日：2017-10-27

Applicant: GM Global Technology Operations LLC

Inventor： Junfeng Zhao ,  Jun-mo Kang ,  Yiran Hu

IPC: F02P5/15 ,  F02D37/02

Abstract: Disclosed are model-based combustion timing systems and control logic for engine assemblies, methods for making/operating such engine assemblies, and motor vehicles with spark-ignited engine assemblies implementing model-based combustion timing. A method for controlling torque output of an engine assembly includes receiving a requested torque demand for the engine, and determining a current fuel command and valve timing for the engine's power cylinder(s). A first math model is used to determine a desired CA50 based on the requested torque demand, a power cylinder indicated mean effective pressure (IMEP), an expander cylinder IMEP, and the current fuel command/valve timing. A second math model is used to determine a maximum brake torque (MBT) CA50 based on power cylinder and expander cylinder IMEPs, and current fuel command/valve timing. An engine control unit determines a final spark timing based on a correlation between the desired CA50 and MBT CA50, modified by a spark timing gain.

公开(公告)号：US20190078521A1

公开(公告)日：2019-03-14

申请号：US15699135

申请日：2017-09-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jun-mo Kang ,  Hejie Lin ,  Jeffrey A. Morgan

IPC: F02D35/02 ,  F02D41/00 ,  F02D41/40 ,  F02P5/153 ,  G01M15/08 ,  G01M15/04

Abstract: A method for controlling an internal combustion engine that includes sensing a characteristic of combustion in a cylinder of the engine, generating a combustion characteristic signal from the sensed characteristic, performing a principal component analysis on the combustion characteristic signal and a predetermined combustion characteristic trace to determine first mode coefficients for the combustion characteristic signal and the predetermined combustion characteristic trace, determining a difference between the first mode coefficient of the combustion characteristic signal and the first mode coefficient of the predetermined combustion characteristic trace, and controlling the internal combustion engine based upon the difference.

公开(公告)号：US10215112B1

公开(公告)日：2019-02-26

申请号：US15699135

申请日：2017-09-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jun-mo Kang ,  Hejie Lin ,  Jeffrey A. Morgan

IPC: F02D35/00 ,  F02D35/02 ,  F02D41/00 ,  G01M15/04 ,  F02P5/153 ,  G01M15/08 ,  F02D41/40

Abstract: A method for controlling an internal combustion engine that includes sensing a characteristic of combustion in a cylinder of the engine, generating a combustion characteristic signal from the sensed characteristic, performing a principal component analysis on the combustion characteristic signal and a predetermined combustion characteristic trace to determine first mode coefficients for the combustion characteristic signal and the predetermined combustion characteristic trace, determining a difference between the first mode coefficient of the combustion characteristic signal and the first mode coefficient of the predetermined combustion characteristic trace, and controlling the internal combustion engine based upon the difference.

公开(公告)号：US20190010890A1

公开(公告)日：2019-01-10

申请号：US15641944

申请日：2017-07-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yiran Hu ,  Jun-mo Kang ,  Steven E. Muldoon ,  Chen-fang Chang

IPC: F02D41/40 ,  F02D41/14 ,  F02P5/04 ,  F02B75/18

Abstract: A direct-injection internal combustion engine is described and includes a pressure sensor that is disposed to monitor in-cylinder combustion pressure. A method, executed as a control routine in an attached controller, includes monitoring engine speed, engine load, temperature and combustion pressure. Combustion variation parameters are determined based upon the combustion pressure. A desired state for a combustion parameter can be determined based upon the engine speed, the engine load, and the temperature, and an adjustment to the desired state for the combustion parameter can be determined based upon the combustion variation parameters, wherein the adjustment to the desired state is selected to achieve acceptable states for the combustion variation parameters. Operation of the internal combustion engine is controlled based upon the desired state for the combustion parameter and the adjustment to the desired state for the combustion parameter.

公开(公告)号：US20180195455A1

公开(公告)日：2018-07-12

申请号：US15404878

申请日：2017-01-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yiran Hu ,  Jun-mo Kang ,  Chen-fang Chang ,  Paul M. Najt

IPC: F02D41/24 ,  F02D41/26 ,  F02D41/14 ,  F02P5/04 ,  F02P5/15

CPC classification number: F02D41/2445 ,  F02D35/028 ,  F02D41/1454 ,  F02D41/2451 ,  F02D41/2467 ,  F02D41/2496 ,  F02D41/3035 ,  F02D41/401 ,  F02D2200/021 ,  F02D2200/0414 ,  F02D2200/101 ,  F02P5/153

Abstract: An engine assembly includes an engine with an engine block having at least one cylinder. A crankshaft is moveable to define a plurality of crank angles from a bore axis defined by the cylinder to a crank axis defined by the crankshaft. The plurality of angles includes a crank angle (CA50) corresponding to 50% of the fuel received by the cylinder being combusted. A controller is operatively connected to the engine and has a processor and a tangible, non-transitory memory on which is recorded instructions for executing a method for controlling the combustion phasing in the engine during a transient state. The controller is programmed to generate a learned table by storing at least one combustion phasing parameter in the tangible, non-transitory memory. Combustion phasing during a transient state is controlled based at least partially on the learned table.

公开(公告)号：US20180058350A1

公开(公告)日：2018-03-01

申请号：US15253169

申请日：2016-08-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yongjie Zhu ,  Jun-mo Kang ,  Chen-fang Chang

IPC: F02D41/00 ,  F02D13/02 ,  F02D41/26 ,  F02B17/00 ,  F02B75/18

CPC classification number: F02D41/0002 ,  F02B1/12 ,  F02B11/00 ,  F02B17/005 ,  F02B75/18 ,  F02D13/0215 ,  F02D13/0261 ,  F02D13/0265 ,  F02D41/1406 ,  F02D41/26 ,  F02D41/3035 ,  F02D2041/001 ,  F02D2200/0402 ,  F02M26/01 ,  Y02T10/18 ,  Y02T10/42

Abstract: An internal combustion engine is described. Controlling the internal combustion engine includes gathering engine operating data during steady-state engine operation, including gathering a first dataset associated with a cylinder air charge during steady-state operation of the engine in the PVO state and gathering a second dataset associated with a cylinder air charge during steady-state operation of the engine in the NVO state. An optimization routine is executed to determine a first subset of parameters associated with a first relationship for a cylinder air charge model based upon the second dataset. The optimization routine is also executed to determine a second subset of parameters associated with a second relationship for the cylinder air charge model based upon the first dataset. A cylinder air charge is determined in real-time during engine operation based upon the cylinder air charge model and the first and second subsets of parameters.

公开(公告)号：US12249854B2

公开(公告)日：2025-03-11

申请号：US17676954

申请日：2022-02-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jun-mo Kang ,  Chen-Fang Chang ,  Dave G. Rich

IPC: H02J7/00 ,  H01M10/42 ,  H01M50/51 ,  H01M50/512

Abstract: A battery system includes: a first positive terminal, a second positive terminal, and a negative terminal; at least two battery modules, each including switches and at least three strings of battery cells configured to, via the switches, at different times be: connected in series and to the first positive terminal; connected in parallel and to the second positive terminal; and disconnected from both of the first and second positive terminals; and a switch control module configured to, when a fault is diagnosed in one of the strings of one of the battery modules: at least one of: actuate the switches and isolate the one of the battery modules from the first and second positive terminals; and actuate the switches and isolate the one of the strings from the first and second positive terminals; and selectively actuate the switches of the remainder of the battery modules using model predictive control.