# US 11,441,455 B2 · Method of controlling oil pump of vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,455 B2 - Document ID: US11441455B2 - Status: Granted - Kind: B2 - Application number: 16/993,579 - Filed: 2020-08-14 - Published: 2021-03-18 - Granted: 2022-09-13 - Earliest claimed: 2019-09-16 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Min Yong Lee; Seong Sik Kim; Jun Sik Park; Hyun Kyu Lim - Web page: https://patentgrep.com/patent/US11441455B2 ## CPC - F01M 1/16: Controlling lubricant pressure or quantity (rendering machines or engines inoperative or idling on lubricant pressure failure F01M1/22) - F01M 1/02: using lubricating pumps (pumps in general F04; lubricating pumps per se F16N) - F01M 1/20: concerning lubricant pressure - F01M 2250/60: Operating parameters - F01M 2250/64: Number of revolutions - F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING ## Abstract A method of controlling an oil pump of a vehicle includes: acquiring, by a controller, information on an engine operating state or a driving condition detected by a driving information detection part; determining, by the controller, whether a predetermined condition of an alternate mode is satisfied on the basis of the acquired information on the engine operating state or the driving condition; and, when the condition of the alternate mode is satisfied, sequentially performing, by the controller, a high-pressure operation control that controls an operation of an oil pump system so as to an oil pressure of an engine to converge on a predetermined target high-pressure value and a low-pressure operation control that controls the oil pressure of the engine to converge on a predetermined target low-pressure value. ## Claims ### Claim 1 A method of controlling an oil pump of a vehicle, the method comprising: acquiring, by a controller, information on an engine operating state or a driving condition detected by a driving information detection part; selecting, by the controller, a control mode satisfying a predetermined condition based on the acquired information on the engine operating state or the driving condition among a plurality of control modes for controlling an operation of an oil pump system; and controlling, by the controller, the operation of the oil pump system to control an oil pressure of an engine to a target value corresponding to the selected control mode among the plurality of control modes, wherein: the plurality of control modes include an alternate mode; when a predetermined condition of the alternate mode is satisfied, the alternate mode is selected; and in controlling the oil pump system, sequentially performing, by the controller, a high-pressure operation control that allows the oil pressure of the engine to converge on a predetermined target high-pressure value, and a low pressure operation control that allows the oil pressure of the engine to converge on a predetermined target low-pressure value. ### Claim 2 (depends on 1) The method of claim 1, wherein: the plurality of control modes include a high-pressure mode; when a predetermined condition of the high-pressure mode during starting the engine, the high-pressure mode is selected; and in controlling of operation of the oil pump system, performing, by the controller during starting the engine, a high-pressure mode control that allows the oil pressure of the engine to converge on the predetermined target high-pressure value. ### Claim 3 (depends on 2) The method of claim 2, wherein: the driving information detection part includes: a temperature sensor configured to detect a temperature of an oil in the engine or a temperature of cooling water of the engine; and an engine revolutions per minute (RPM) sensor for detecting an engine RPM; and after an engine starting request is detected, when the engine RPM detected by the engine RPM sensor reaches a set RPM and the detected temperature of the oil or the cooling water of the engine is less than or equal to a predetermined low critical temperature, the controller determines that the predetermined condition of the high-pressure mode is satisfied. ### Claim 4 (depends on 3) The method of claim 3, wherein, when the detected temperature of the oil or the cooling water of the engine is greater than the predetermined low critical temperature and is less than a predetermined high critical temperature, the controller determines that a condition of an alternate mode is satisfied. ### Claim 5 (depends on 4) The method of claim 4, wherein, when the detected temperature of the oil or the cooling water is greater than or equal to the predetermined high critical temperature, the controller performs a high-temperature and high-pressure mode control that controls the oil pump system so as to allow the oil pressure of the engine to converge on a predetermined target high-pressure value. ### Claim 6 (depends on 3) The method of claim 3, wherein the high-pressure mode control during starting the engine includes: determining a high-pressure maintaining time based on a current oil temperature or a current water temperature using information stored in the controller; performing the high-pressure operation control that counts the high-pressure maintaining time after a high-pressure operation is turned on and allows the oil pressure of the engine to converge on the predetermined target high-pressure value while the high-pressure maintaining time is counted; and when a high-pressure maintaining time, during which the operation of the oil pump system is controlled, reaches the determined high-pressure maintaining time, terminating the high-pressure operation control. ### Claim 7 (depends on 1) The method of claim 1, wherein: the driving information detection part includes: a temperature sensor configured to detect a temperature of engine oil or a temperature of cooling water of the engine; and when the detected temperature of the engine oil or the cooling water of the engine falls within a predetermined temperature range, the controller determines that the predetermined condition of the alternate mode is satisfied. ### Claim 8 (depends on 7) The method of claim 7, wherein an alternate mode control includes: determining a high-pressure maintaining time based on a current oil temperature or a current water temperature using information stored in the controller; performing the high-pressure operation control that counts the high-pressure maintaining time after a high-pressure operation is turned on and controls the oil pump system so as to allow the oil pressure of the engine to converge on the predetermined target high-pressure value while the high-pressure maintaining time is counted; and when the high-pressure maintaining time, during which the oil pump system is controlled, reaches a predetermined high-pressure maintaining time, terminating the high-pressure operation control and checking the current oil temperature or the current water temperature again; determining a low-pressure maintaining time based on the current oil temperature or the current water temperature, which is checked again, using information stored in the controller; performing a low-pressure operation control that counts the low-pressure maintaining time after a low-pressure operation is turned on and controls the oil pump system so as to allow the oil pressure of the engine to converge on the predetermined target low-pressure value while the low-pressure maintaining time is counted; when the low-pressure maintaining time, during which the oil pump system is controlled, reaches a predetermined low-pressure maintaining time, terminating the low-pressure operation control; and when the predetermined condition of the alternate mode is satisfied until an engine off request is detected, repeating the alternate mode control. ### Claim 9 (depends on 8) The method of claim 8, further comprising: after the determining of the high-pressure maintaining time, checking whether the high-pressure maintaining time is zero second; and when the high-pressure maintaining time is not zero second, repeating the alternate mode control. ### Claim 10 (depends on 9) The method of claim 9, wherein, when the high-pressure maintaining time is zero second, the controller turns on the low-pressure operation to count the low-pressure maintaining time and controls the oil pump system so as to allow the oil pressure of the engine to converge on the predetermined target low-pressure value while the low-pressure maintaining time is counted. ### Claim 11 (depends on 1) The method of claim 1, wherein: the driving information detection part includes: an accelerator pedal position sensor configured to detect an accelerator pedal manipulation state by a driver; the plurality of control modes include a high-pressure mode; in selecting the control mode, when a predetermined rapid acceleration condition is satisfied based on a signal of the accelerator pedal position sensor, the controller selects the high-pressure mode; and when the high-pressure mode is selected, in controlling the oil pump system, the controller performs a high-pressure mode control that controls the oil pump system so as to allow the oil pressure of the engine to converge on the predetermined target high-pressure value. ### Claim 12 (depends on 1) The method of claim 1, wherein: the plurality of control modes include a high-pressure mode; in selecting the control mode, when the controller determines a knocking generation condition of the engine based on the engine operating state or the driving condition, the controller selects the high-pressure mode; and when the high-pressure mode is selected, in controlling the oil pump system, the controller performs a high-pressure mode control that controls the oil pump system so as to allow the oil pressure of the engine to reach the predetermined target high-pressure value.