METHOD AND SYSTEM OF AIR CHARGING FOR AN INTERNAL COMBUSTION ENGINE
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
F02D-041/26
F02D-041/00
F02B-037/24
F02B-037/04
F02D-041/18
출원번호
US-0603001
(2017-05-23)
공개번호
US-0340485
(2018-11-29)
발명자
/ 주소
DI GENNARO, Francesco
CONTE, Giuseppe
출원인 / 주소
GM GLOBAL TECHNOLOGY OPERATIONS LLC
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
Methods and systems are provided for controlling the operation of an air charging system of an internal combustion engine. A plurality of actuators include an electric motor of an air compressor. Output parameters of the air charging system are monitored by a plurality of sensors. An error between e
Methods and systems are provided for controlling the operation of an air charging system of an internal combustion engine. A plurality of actuators include an electric motor of an air compressor. Output parameters of the air charging system are monitored by a plurality of sensors. An error between each one of the output parameters and a target value thereof is calculated by a processor. The calculated errors are applied to linear controllers that yield virtual inputs. Input parameters for the air charging system are calculated using the virtual inputs. The input parameters affect all of the output parameters. The input parameters are calculated with a non-linear mathematical model of the air charging system, configured such that each one of the virtual inputs is in a linear relation with only one of the output parameters. The actuators are operated using the input parameters.
대표청구항▼
1. A method of controlling the operation of an air charging system of an internal combustion engine, wherein the air charging system comprises, and wherein the method comprises: monitoring, by a plurality of sensors, a plurality of output parameters of the air charging system;calculating, by a proce
1. A method of controlling the operation of an air charging system of an internal combustion engine, wherein the air charging system comprises, and wherein the method comprises: monitoring, by a plurality of sensors, a plurality of output parameters of the air charging system;calculating, by a processor, an error between each one of the output parameters and a target value thereof;applying, by the processor, each one of the calculated errors to a linear controller that yields a virtual input;calculating, by the processor, a plurality of input parameters for the air charging system using the virtual input with a non-linear mathematical model of the air charging system configured such that each one of the virtual inputs is in a linear relation with only one of the output parameters, wherein each one of the input parameters affects all of the output parameters; andoperating a plurality of actuators of the air charging system including an electric motor of an air compressor, wherein each of the actuators using a corresponding one of the input parameters. 2. The method according to claim 1, wherein calculating the input parameters comprises calculating, by the processor, an input parameter for the electric motor and at least one of a first actuator for an air intake valve, a second actuator for an exhaust gas recirculation valve, and a third actuator for a variable-geometry turbocharger. 3. The method according to claim 2, wherein calculating the input parameters comprises calculating, by the processor, an input parameter for each of the first actuator for the air intake valve, the second actuator for the exhaust gas recirculation valve, and the third actuator for the variable-geometry turbocharger and the electric motor. 4. The method according to claim 3, wherein calculating the input parameters further comprises: calculating, by the processor, a first input parameter indicative of an air mass flow rate through the air intake valve;calculating, by the processor, a second input parameter indicative of an exhaust mass flow rate through the exhaust gas recirculation valve;calculating, by the processor, a third input parameter indicative of an exhaust mass flow rate through a turbine of the variable-geometry turbocharger; andcalculating, by the processor, a fourth input parameter indicative of an electrical power provided to the electric motor. 5. The method according to claim 4, wherein the output parameters of the air charging system comprise a first output parameter indicative of an exhaust manifold pressure in an exhaust manifold, a second output parameter indicative of an intake manifold pressure in an intake manifold, a third output parameter indicative of a residual gas fraction in the intake manifold, and a fourth output parameter indicative of an air pressure downstream of the air compressor. 6. The method according to claim 3, wherein calculating the input parameters further comprises: calculating, by the processor, a first input parameter indicative of an air mass flow rate through the air intake valve;calculating, by the processor, a second input parameter indicative of a flow effective area of the exhaust gas recirculation valve;calculating, by the processor, a third input parameter indicative of a power rate of a turbine of the variable-geometry turbocharger; andcalculating, by the processor, a fourth input parameter indicative of an electrical power provided to the electric motor of the air compressor. 7. The method according to claim 6, wherein the output parameters of the air charging system comprise a first output parameter indicative of an intake manifold pressure, a second output parameter indicative of a compression rate caused by a compressor of the variable-geometry turbocharger, a third output parameter indicative of a residual gas fraction in the intake manifold, and a fourth output parameter indicative of a compression rate caused by the air compressor. 8. The method according to claim 1, wherein calculating the input parameters comprises calculating, by the processor, an input parameter for each of a first actuator of an air intake valve, a second actuator of a first exhaust gas recirculation valve, a third actuator of a second exhaust gas recirculation valve, a fourth actuator of a variable-geometry turbocharger and the electric motor. 9. The method according to claim 8, wherein calculating the input parameters further comprises: calculating, by the processor, a first input parameter indicative of an air mass flow rate through the air intake valve;calculating, by the processor, a second input parameter indicative of a flow effective area of the first exhaust gas recirculation valve;calculating, by the processor, a third input parameter indicative of a flow effective area of the second exhaust gas recirculation valve;calculating, by the processor, fourth input parameter indicative of a power rate of a turbine of the variable-geometry turbocharger; andcalculating, by the processor, a fifth input parameter indicative of an electrical power to be provided to the electric motor of the air compressor. 10. The method according to claim 9, wherein the output parameters of the air charging system comprise a first output parameter indicative of a pressure within an intake manifold, a second output parameter indicative of a residual gas fraction in the intake manifold, a third output parameter indicative of a compression rate caused by a compressor of the variable-geometry turbocharger, a fourth output parameter indicative of a residual gas fraction in an intake duct upstream of the compressor, and a fifth output parameter indicative of a compression rate caused by the air compressor. 11. The method according to claim 10, further comprising: processing each of the errors in a separate linear controller to yield a virtual input for each of the errors;calculating, in a non-linear calculation module, the input parameters using the virtual inputs, wherein the input parameters are decoupled from one another;applying the calculated first, second, third and fourth input parameters to a calculation module;calculating a corresponding position value for each of the first, second, third and fourth actuators using a mathematical model of each of the air intake valve, the first exhaust gas recirculation valve, the second exhaust gas recirculation valve, and the turbine of the variable-geometry turbocharger;operating each of the first, second, third and fourth actuators to achieve the corresponding position value; andoperating the electric motor by supplying the electric power. 12. An air charging system of an internal combustion engine comprising: a plurality of actuators including an electric motor of an air compressor; andan electronic control unit including a processor configured to: monitor a plurality of output parameters of the air charging system,calculate an error between each one of the monitored output parameters and a target value thereof,apply each one of the calculated errors to a linear controller that yields a plurality of virtual inputs,use the virtual inputs to calculate a plurality of input parameters for the air charging system, wherein the input parameters are calculated using a non-linear mathematical model of the air charging system configured such that each virtual input is in a linear relation with only one of the plurality of output parameters, anduse each of the input parameters to operate a corresponding one of the plurality of actuators of the air charging system. 13. The air charging system according to claim 12, wherein the plurality of actuators comprises: a first actuator operating an air intake valve;a second actuator operating a first exhaust gas recirculation valve;a third actuator operating a second exhaust gas recirculation valve; anda fourth actuator operating a turbine of a variable-geometry turbocharger. 14. The air charging system according to claim 13, wherein the electronic controller comprises: a set of linear controllers, one of which corresponds to each of the electric motor, the first actuator, the second actuator, the third actuator, and the fourth actuator, wherein each linear controller is configured to yield a virtual input;a non-linear calculation module configured to calculate the input parameters; anda math model calculation module configured to calculate a corresponding position value for each of the first, second, third and fourth actuators using a mathematical model of each of the air intake valve, the first exhaust gas recirculation valve, the second exhaust gas recirculation valve, and the turbine of the variable-geometry turbocharger. 15. The air charging system according to claim 14, wherein the electronic controller further comprises an actuator operating module configured to receive the position values, and to receive the input parameter corresponding to the electric motor, and to operate the first second, third and fourth actuators and the electric motor based on the received position values and input parameter. 16. The air charging system according to claim 15 wherein the input parameter corresponding to the electric motor comprises an electric power value and is supplied to the actuator operating module without being processed through the math model calculation module.
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