# US 10,767,591 B2 · Abnormality determination device for variable geometry turbocharger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,591 B2 - Document ID: US10767591B2 - Status: Granted - Kind: B2 - Application number: 15/540,402 - Filed: 2015-01-16 - Published: 2018-01-04 - Granted: 2020-09-08 - Earliest claimed: 2015-01-16 - Assignees: Mitsubishi Heavy Industries, Ltd. - Applicants: Mitsubishi Heavy Industries, Ltd. - Inventors: Mitsufumi Goto - Web page: https://patentgrep.com/patent/US10767591B2 ## CPC - F01D 17/165: {for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line (F01D17/167 takes precedence)} - F02D 41/221: {relating to the failure of actuators or electrically driven elements} - F01D 21/10: responsive to unwanted deposits on blades, in working-fluid conduits or the like - F02B 37/22: by varying cross-section of exhaust passages or air passages {, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits} (F02B37/24 takes precedence) - F02B 37/24: by using pumps or turbines with adjustable guide vanes - F02B 39/16: Other safety measures for, or other control of, pumps - F02D 41/0007: {for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12)} - F02D 41/266: {the computer being backed-up or assisted by another circuit, e.g. analogue} - F02D 2041/2058: {using information of the actual current value} - F05D 2220/40: in turbochargers - F05D 2260/407: through piezoelectric conversion - F05D 2260/80: Diagnostics - F05D 2270/09: to cope with emergencies - F05D 2270/11: to prolong engine life - F05D 2270/62: Electrical actuators - F05D 2270/708: with comparison tables - F05D 2270/821: Displacement measuring means, e.g. inductive - Y02T 10/12: Improving ICE efficiencies - Y02T 10/40: Engine management systems - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - 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) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The present application relates to an abnormality determination device for a variable geometry turbocharger having a nozzle mechanism capable of changing a flow path area of exhaust gas with an actuator. The abnormality determination device includes: a first detection part configured to be capable of detecting at least one of a load of the actuator or supply energy to the actuator; and a determination part configured to determine that an abnormality is present, if a detection result by the first detection part is out of an allowable range corresponding to an operational state of the variable geometry turbocharger. ## Claims ### Claim 1 An abnormality determination device for a variable geometry turbocharger having a nozzle mechanism capable of changing a flow path area of exhaust gas with an actuator, the abnormality determination device comprising: a first detection part configured to detect at least one of a load of the actuator and an amount of energy supplied to the actuator; a determination part configured to determine that an abnormality is present, if a detection result by the first detection part is outside of an allowable range corresponding to an operational state of the variable geometry turbocharger: a second detection part configured to detect the operational state of the variable geometry turbocharger; and a storage part configured to store a map which defines a relationship between the operational state of the variable geometry turbocharger and the allowable range, wherein the determination part is configured to set the allowable range corresponding to the operational state detected by the second detection part on the basis of the map, and wherein the map comprises a plurality of maps prepared corresponding to an opening degree of the nozzle mechanism. ### Claim 2 (depends on 1) The abnormality determination device for a variable geometry turbocharger according to claim 1, further comprising: an energy sensor disposed in an energy supply path connecting an energy supply source and the actuator, wherein the first detection part is configured to detect the supply energy on the basis of a detection value of the energy sensor. ### Claim 3 (depends on 1) The abnormality determination device for a variable geometry turbocharger according to claim 1, wherein the operational state is determined including at least one of a boost pressure of the variable capacity turbocharger and the load of the actuator. ### Claim 4 (depends on 1) The abnormality determination device for a variable geometry turbocharger according to claim 1, wherein the supply energy is one of electric energy and pressure energy. ### Claim 5 (depends on 1) The abnormality determination device for a variable geometry turbocharger according to claim 1, further comprising: a transmission part for sending a determination result by the determination part to a control unit for controlling an engine supercharged by the variable geometry turbocharger. ### Claim 6 An abnormality determination device for a variable geometry turbocharger having a nozzle mechanism capable of changing a flow path area of exhaust gas with an actuator, the abnormality determination device comprising: a first detection part configured to detect at least one of a load of the actuator and an amount of energy supplied to the actuator; and a determination part configured to determine that an abnormality is present, if a detection result by the first detection part is outside of an allowable range corresponding to an operational state of the variable geometry turbocharger: wherein the first detection part is configured to detect both of the load of the actuator and the amount of energy supplied to the actuator, and wherein the determination part is configured to determine that an abnormality is present in an energy supply path to the actuator, if the load of the actuator is small with respect to the supply energy to the actuator. ### Claim 7 An abnormality determination device for a variable geometry turbocharger having a nozzle mechanism capable of changing a flow path area of exhaust gas with an actuator, the abnormality determination device comprising: a first detection part configured to detect at least one of a load of the actuator and an amount of energy supplied to the actuator; a determination part configured to determine that an abnormality is present, if a detection result by the first detection part is outside of an allowable range corresponding to an operational state of the variable geometry turbocharger; a housing to which a reaction force of the actuator is applicable; and a piezoelectric element interposed between the actuator and the housing, wherein the first detection part is configured to detect the load of the actuator on the basis of an output voltage of the piezoelectric element. ### Claim 8 (depends on 7) The abnormality determination device for a variable geometry turbocharger according to claim 7, wherein the actuator is connected to the nozzle mechanism via a rod member configured to be drivable along an axial direction, and wherein the piezoelectric element is disposed on an opposite side from a side of the actuator to which the rod member is connected.