# US 10,480,442 B2 · Working machine and working machine monitoring system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,442 B2 - Document ID: US10480442B2 - Status: Granted - Kind: B2 - Application number: 16/218,597 - Filed: 2018-12-13 - Published: 2019-04-18 - Granted: 2019-11-19 - Earliest claimed: 2014-04-16 - Assignees: Hitachi Construction Machinery Co., Ltd. - Applicants: Hitachi Construction Machinery Co., Ltd. - Inventors: Shinya Sato; Masatoshi Hoshino; Kouji Ishikawa; Shinji Ishihara - Web page: https://patentgrep.com/patent/US10480442B2 ## CPC - 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)} - E02F 9/267: {Diagnosing or detecting failure of vehicles} - F02D 29/02: peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers - F02D 29/04: peculiar to engines driving pumps - F02D 41/0025: {Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures} - F02D 41/04: Introducing corrections for particular operating conditions (F02D41/14 takes precedence) - F02D 41/26: using computer, e.g. microprocessor - G07C 5/008: {communicating information to a remotely located station (transmission systems for measured values G08C)} - G07C 5/0808: {Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005)} - G07C 5/0816: {Indicating performance data, e.g. occurrence of a malfunction} - G07C 5/0841: {Registering performance data (recording measured values G01D; information storage G11B)} - E02F 3/32: working downwardly and towards the machine, e.g. with backhoes - E02F 9/2066: {of the type combustion engines} - E02F 9/26: Indicating devices {(E02F5/145 takes precedence)} - F02D 2041/228: {Warning displays} - F02D 2200/0612: determined by estimation - F02D 2200/0614: Actual fuel mass or fuel injection amount - F02D 2200/0618: Actual fuel injection timing or delay, e.g. determined from fuel pressure drop - F02D 2200/602: Pedal position - F02D 2250/26: by applying a torque limit - 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) - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE ## Abstract An object of the present invention is to provide a working machine and a working machine monitoring system using the same which is capable of improving the accuracy in determining fuel property. The working machine is provided with an engine operation parameter acquisition module (1041) that acquires an engine operation parameter representing the operation state of an engine mounted on the working machine; a refueling time acquisition module (1011) that acquires a refueling time when the working machine is supplied with fuel; and a fuel property determination module (1014) that determines the property of the fuel based on a comparison result of the time when the engine operation parameter changes, with the refueling time. ## Claims ### Claim 1 A work machine monitoring system comprising a monitoring server connected to a plurality of work machines through a network, wherein each of the work machines comprises an engine and a position detection module, and the monitoring server is programmed to: receive, from each of the plurality of work machines, individual information of the respective work machine comprising an engine operation parameter representing an operation state of the engine mounted on the respective working machine, a refueling timing at which fuel is supplied to the respective working machine and position information of the respective work machine output from the position detection module; determine that a cause of a change in the engine operation parameter of one of the work machines is due to a change in a fuel property, if a change amount of the engine operation parameter of the one of the work machines exceeds a first threshold value which is a reference value corresponding to a predetermined fuel type within a first time period in which an influence by the fuel property is considered to arise; when it is determined that the fuel of the one of the work machines is abnormal, extract the individual information including the position information of the plurality of work machines at a same loading site as the one of the work machines within a predetermined time range; when the extracted individual information shows that there is an abnormality in the fuel among of the plurality of work machines at the same loading site as the one of the work machines within the predetermined time range, determine that the cause of the change in the engine operating parameter of the one of the work machines is based on the abnormality in the fuel; when the extracted individual information shows that there is no abnormality in the fuel among of the plurality of work machines at the same loading site as the one of the work machines within the predetermined time range, determine that the cause of the change in the engine parameter of the one of the work machines is not based on the abnormality in the fuel of the one of the work machines but is inherent to the of the one of the work machines; and when the abnormality in the fuel of the one of the work machines is determined, transmit an instruction information for instructing a restriction in output power of the engine for the one of the work machines. ### Claim 2 (depends on 1) The monitoring system for a work machine according to claim 1, wherein the engine operation parameter further comprises: a particulate matter discharged from the engine, a supercharge pressure of the engine, an exhaust temperature representing the temperature of the exhaust gas discharged from the engine, and a rotation fluctuation during idling of the engine.