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    CONSOLIDATION OF CONSTRAINTS IN MODEL PREDICTIVE CONTROL
    2.
    发明申请
    CONSOLIDATION OF CONSTRAINTS IN MODEL PREDICTIVE CONTROL 审中-公开

    公开(公告)号：US20190301387A1

    公开(公告)日：2019-10-03

    申请号：US15937128

    申请日：2018-03-27

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Ning Jin ,  Nicola Pisu ,  Ruixing Long ,  David N. Hayden

    IPC: F02D41/14

    Abstract: A method, control system, and propulsion system use model predictive control to control and track several parameters for improved performance of the propulsion system. Numerous sets of possible command values for a set of controlled variables are determined. Initial constraints for the controlled variables are determined, which include upper and lower limits for each controlled variable and upper and lower rate-of-change limits for each controlled variable. A set of consolidated constraint limits for the controlled variables is then determined. Each consolidated constraint limit is determined by consolidating one of the upper and lower limits with one of the upper and lower rate-of-change limits. A cost for each set of possible command values is determined, and the set of possible command values that has the lowest cost and falls within the set of consolidated constraint limits is selected for use in controlling the propulsion system.

    Method to control engine using airflow actuators
    3.
    发明授权
    Method to control engine using airflow actuators 有权

    公开(公告)号：US10519880B2

    公开(公告)日：2019-12-31

    申请号：US15487150

    申请日：2017-04-13

    Applicant: GM Global Technology Operations LLC

    Inventor： Nicola Pisu ,  Vincenzo Alfieri ,  Julian R. Verdejo ,  Gary Robert Cygan, Jr. ,  Ning Jin

    IPC: B60T7/12 ,  F02D41/00 ,  F02B37/18 ,  F02M35/10 ,  F02D41/14 ,  F02D35/02 ,  F02D13/02

    Abstract: A torque requesting module generates a torque request for an engine based on driver input. A model predictive control (MPC) module: identifies sets of possible target values based on the torque request, each of the sets of possible target values including target effective throttle area percentage; determines predicted operating parameters for the sets of possible target values, respectively; determines cost values for the sets of possible target values, respectively; selects one of the sets of possible target values based on the cost values; and sets target values based on the possible target values of the selected one of the sets, respectively, the target values including a target pressure ratio across the throttle valve. A target area module determines a target opening area of the throttle valve based on the target effective throttle area percentage ratio. A throttle actuator module controls the throttle valve based on the target opening.

    Method of controlling camshaft phase based on humidity
    4.
    发明授权
    Method of controlling camshaft phase based on humidity 有权

    公开(公告)号：US10167746B2

    公开(公告)日：2019-01-01

    申请号：US15429219

    申请日：2017-02-10

    Applicant: GM Global Technology Operations LLC

    Inventor： Christopher E. Whitney ,  David N. Hayden ,  Nicola Pisu ,  Stephen P. Levijoki

    IPC: F02D13/02 ,  F01L1/344 ,  F01L1/047 ,  F02D41/02 ,  F02D41/04 ,  F01L13/00 ,  F01L1/46

    Abstract: A method of phasing the opening and closing of internal combustion engine intake and exhaust valves relative to the rotation of the crankshaft is based upon changes in engine speed, engine load and ambient relative humidity. During certain conditions of higher humidity, in order to maintain good combustion stability and thus overall engine operation, it is necessary to reduce intake and exhaust valve overlap by adjusting the phase of the intake and exhaust camshafts. This is achieved by utilizing a set of cam position reference values and constraints based upon engine speed, engine load and humidity that are contained in lookup tables that adjust and limit cam position and valve overlap. Generally speaking, in order to maintain optimum engine performance, intake and exhaust valve overlap is reduced with higher ambient humidity and vice versa.

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