# US 10,871,128 B2 · Water injector control method for immediate water injection and engine driven by method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,128 B2 - Document ID: US10871128B2 - Status: Granted - Kind: B2 - Application number: 16/197,664 - Filed: 2018-11-21 - Published: 2019-06-20 - Granted: 2020-12-22 - Earliest claimed: 2017-12-14 - Assignees: Hyundai Autron Co., Ltd. - Applicants: Hyundai Autron Co., Ltd. - Inventors: Young-Jae Kim - Web page: https://patentgrep.com/patent/US10871128B2 ## CPC - F02M 25/0227: {Control aspects; Arrangement of sensors; Diagnostics; Actuators} - F02B 47/02: the substances being water or steam - F02M 25/0222: {Water recovery or storage} - F02M 25/028: into the charge intakes - Y02T 10/12: Improving ICE efficiencies - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Disclosed herein are a method of controlling a water injector for immediate water injection and an engine driven by the method. A method of controlling an operation of a water injector for injecting water into the combustion chamber of an engine to which a turbo system for increasing the amount of air by pressing air has been applied includes detecting water pressure applied to a water supply pipe for supplying water to the water injector, stopping an operation of a water supply pump when the detected data reaches a preset reference value, detecting a temperature of water within the water supply pipe for supplying the water to the water injector, and returning the water within the water supply pipe to a water storage tank and driving the water supply pump to supplying new water to the water supply pipe when the detected data deviates from a preset range. ## Claims ### Claim 1 A method of controlling an operation of a water injector for injecting water into a combustion chamber of an engine to which a turbo system for increasing an amount of air by pressing air has been applied, the method comprising: a water pressure detection step of detecting water pressure applied to a water supply pipe for supplying water to the water injector; a pump stop step of stopping an operation of a water supply pump when the data detected in the water pressure detection step reaches a preset reference value; a stop time calculation step of calculating a stop time of the water supply pump stopped in the pump stop step; a water temperature detection step of detecting a temperature of water within the water supply pipe for supplying the water to the water injector; and a water replacement step of returning the water within the water supply pipe to a water storage tank and driving the water supply pump to supplying new water to the water supply pipe when the data detected in the water temperature detection step deviates from a preset range, wherein when the stop time of the water supply pump deviates from a preset range, the water replacement step of returning the water within the water supply pipe to the water storage tank and driving the water supply pump to supply the new water to the water supply pipe is performed. ### Claim 2 A method of controlling an operation of a water injector for injecting water into a combustion chamber of an engine to which a turbo system for increasing an amount of air by pressing air has been applied, the method comprising: a water pressure detection step of detecting water pressure applied to a water supply pipe for supplying water to the water injector; a pump stop step of stopping an operation of a water supply pump when the data detected in the water pressure detection step reaches a preset reference value; a water temperature detection step of detecting a temperature of water within the water supply pipe for supplying the water to the water injector; and a water replacement step of returning the water within the water supply pipe to a water storage tank and driving the water supply pump to supplying new water to the water supply pipe when the data detected in the water temperature detection step deviates from a preset range, wherein the water temperature detection step comprises further detecting a modeling temperature of each of the engine and a manifold, and when the detected modeling temperature of each of the engine and the manifold deviates from a preset range, the water replacement step of returning the water within the water supply pipe to the water storage tank and driving the water supply pump to supply the new water to the water supply pipe is performed. ### Claim 3 (depends on 1) The method of claim 1, further comprising a water injection execution step of driving the water injector by providing water within the water supply pipe to the water injector when the data detected in the water temperature detection step satisfies a preset range condition. ### Claim 4 (depends on 1) The method of claim 1, wherein in the water temperature detection step, a temperature of the water within the water supply pipe is measured in real time. ### Claim 5 An engine comprising a water injector for injecting water into a combustion chamber of an engine to which a turbo system has been applied, the engine comprising: a detection unit, the detection unit detects water pressure applied to a water supply pipe and a temperature of the water within the water supply pipe and transmits the detected data to a controller, wherein the controller calculates a stop time of the water supply pump, and when the stop time of the water supply pump deviates from a preset range, the controller returns the water within the water supply pipe to the water storage tank and drives the water supply pump to supply the new water to the water supply pipe, and the controller stops an operation of a water supply pump when the data detected by the detection unit reaches a preset reference value and controls an operation of the water supply pump so that the water within the water supply pipe is returned to a water storage tank and the water supply pump is driven to supply new water to the water supply pipe when a temperature of the water deviates from a preset range. ### Claim 6 (depends on 5) The engine of claim 5, wherein: the detection unit further detects a modeling temperature of each of the engine and a manifold, and when the detected modeling temperature of each of the engine and the manifold deviate from a preset range, the controller returns the water within the water supply pipe to the water storage tank and drives the water supply pump to supply the new water to the water supply pipe. ### Claim 7 (depends on 5) The engine of claim 5, wherein the controller drives a water injector by supplying the water within the water supply pipe to the water injector when the data detected by the detection unit satisfies a preset range condition. ### Claim 8 (depends on 5) The engine of claim 5, wherein the detection unit measures a temperature of the water within the water supply pipe. ### Claim 9 (depends on 2) The method of claim 2, further comprising a water injection execution step of driving the water injector by providing water within the water supply pipe to the water injector when the data detected in the water temperature detection step satisfies a preset range condition. ### Claim 10 (depends on 2) The method of claim 2, wherein in the water temperature detection step, a temperature of the water within the water supply pipe is measured in real time.