# US 10,767,575 B2 · Control system and method for fuel injection by predicting engine noise > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,575 B2 - Document ID: US10767575B2 - Status: Granted - Kind: B2 - Application number: 16/422,245 - Filed: 2019-05-24 - Published: 2020-04-09 - Granted: 2020-09-08 - Earliest claimed: 2018-10-08 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Seung-Hyun Lee; In-Soo Jung - Web page: https://patentgrep.com/patent/US10767575B2 ## CPC - F02D 35/023: {by determining the cylinder pressure} - F02D 35/0092: {by means of fuel injection} - F02D 41/22: Safety or indicating devices for abnormal conditions {(in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809)} - F02D 41/26: using computer, e.g. microprocessor - F02D 41/38: of the high pressure type - F02D 41/3836: {Controlling the fuel pressure} - F02D 41/0235: {in relation with the state of the exhaust gas treating apparatus (control of exhaust gas treating apparatus per se F01N)} - F02D 2041/288: {for performing a transformation into the frequency domain, e.g. Fourier transformation} - F02D 2200/024: Fluid pressure of lubricating oil or working fluid - F02D 2200/025: Engine noise, e.g. determined by using an acoustic sensor - F02D 2200/0618: Actual fuel injection timing or delay, e.g. determined from fuel pressure drop - F02D 2200/0806: NOx storage amount, i.e. amount of NOx stored on NOx trap - F02D 2200/101: Engine speed - F02D 2250/36: Control for minimising NOx emissions - Y02T 10/40: Engine management systems - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A control system for fuel injection by predicting engine noise may include an engine noise predicting device configured to derive a predicted engine noise value in real time by a predicted engine noise coefficient which is pre-stored according to a currently measured combustion pressure value of an engine; and a combustion controller configured to determine a difference between the real-time predicted engine noise value derived by the engine noise predicting device and a target engine noise value for a current operation condition of the engine, and when the engine noise is determined as being degraded due to an abnormal combustion, configured to change the target engine noise value to control fuel injection according to the changed target engine noise value. ## Claims ### Claim 1 A noise control system related to fuel efficiency and emission value by predicting engine noise, the noise control system comprising: an engine noise predicting device configured to derive a real-time predicted engine noise value by a predicted engine noise coefficient which is pre-stored according to a currently measured combustion pressure value of an engine; and an engine control unit (ECU) configured to determine a difference between the real-time predicted engine noise value derived by the engine noise predicting device and a target engine noise value for a current operation condition of the engine, and when the engine noise is determined as being degraded due to an abnormal combustion, configured to change the target engine noise value to control the fuel efficiency and the emission value according to the changed target engine noise value. ### Claim 2 (depends on 1) The noise control system of claim 1, wherein a combustion controller is configured to obtain the target engine noise value for the current operation condition of the engine by a map of the target engine noise value pre-stored in the electronic control unit. ### Claim 3 (depends on 2) The noise control system of claim 2, wherein when the difference between the real-time predicted engine noise value derived and the target engine noise value for the current operation condition of the engine is equal to or greater than a predetermined threshold, the combustion controller is configured to determine the engine noise as being degraded due to the abnormal combustion. ### Claim 4 (depends on 3) The noise control system of claim 3, wherein the combustion controller changes injection parameters including a main injection time and an injection pressure according to the changed target engine noise value, controlling a fuel injection. ### Claim 5 (depends on 4) The noise control system of claim 4, wherein the real-time predicted engine noise coefficient includes data obtained by mapping the predicted engine noise value according to a combustion pressure of the engine. ### Claim 6 (depends on 5) The noise control system of claim 5, wherein the real-time predicted engine noise coefficient includes data obtained by mapping the predicted engine noise value according to operation conditions of the engine including a rotation speed of the engine and a load of the engine. ### Claim 7 (depends on 6) The noise control system of claim 6, further including: an engine measuring device configured to generate a model for fuel efficiency and discharge by modeling a value of fuel efficiency, a value of NOx value, and a value of particle matter (PM) which are measured according to the real-time predicted engine noise value. ### Claim 8 (depends on 7) The noise control system of claim 7, wherein the combustion controller is configured to determine predicted values of the fuel efficiency, the NOx, and the PM which correspond to the changed injection parameters according to the model for fuel efficiency and discharge and, when the predicted values of the fuel efficiency, the NOx, and the PM satisfy predetermined thresholds, the combustion controller is configured to control the fuel injection according to the changed injection parameters. ### Claim 9 A control method for fuel injection by predicting engine noise, the control method comprising: measuring a current combustion pressure of an engine; deriving a real-time predicted engine noise value according to the current combustion pressure of the engine by a pre-stored predicted engine noise coefficient; deriving a target engine noise value for a current operation condition of the engine; determining a difference between the real-time predicted engine noise value and the target engine noise value for the current operation condition; and determining when the engine noise is degraded due to an abnormal combustion. ### Claim 10 (depends on 9) The control method of claim 9, wherein, when the difference between the real-time predicted engine noise value and the target engine noise value for the current operation condition of the engine is equal to or greater than a predetermined threshold, the determining of when the engine noise is degraded due to the abnormal combustion includes determining the engine noise as being in a degraded state. ### Claim 11 (depends on 10) The control method of claim 10, further including: when the engine noise is determined as being in the degraded state, changing the target engine noise value and changing injection parameters including a main injection time and an injection pressure according to the changed target engine noise value. ### Claim 12 (depends on 11) The control method of claim 11, wherein the deriving of the target engine noise value for the current operation condition of the engine includes deriving the target engine noise value by a map of a target engine noise value pre-stored in an electronic control unit (ECU). ### Claim 13 (depends on 11) The control method of claim 11, wherein the pre-stored predicted engine noise coefficient includes data obtained by mapping the real-time predicted engine noise value according to the current combustion pressure of the engine. ### Claim 14 (depends on 13) The control method of claim 13, wherein the pre-stored predicted engine noise coefficient includes data obtained by mapping the real-time predicted engine noise value according to operation conditions of the engine including a rotation speed of the engine and a load of the engine. ### Claim 15 (depends on 14) The control method of claim 14, further including: determining a value of fuel efficiency, a value of NOx, and a value of particle matter (PM) which correspond to the changed injection parameters obtained in changing the injection parameters according to a model for fuel efficiency and discharge obtained by modeling values of the fuel efficiency, the NOx, and the PM which are measured according to the real-time predicted engine noise value. ### Claim 16 (depends on 15) The control method of claim 15, further including: determining when predicted values of the fuel efficiency, the NOx, and the PM which are determined in determining the predicted values of the fuel efficiency, the NOx, and the PM satisfy predetermined thresholds; and when the predicted values of the fuel efficiency, the NOx, and the PM satisfy predetermined thresholds, controlling the fuel injection according to the changed injection parameters.