# US 10,502,690 B2 · Indicator system for vehicle wear components > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,690 B2 - Document ID: US10502690B2 - Status: Granted - Kind: B2 - Application number: 15/652,707 - Filed: 2017-07-18 - Published: 2019-01-24 - Granted: 2019-12-10 - Earliest claimed: 2017-07-18 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Stuart C. Salter; Terry R. Lobsinger; James J. Surman; Paul Kenneth Dellock - Web page: https://patentgrep.com/patent/US10502690B2 ## CPC - F02B 77/081: {relating to endless members} - B60Q 3/30: for compartments other than passenger or driving compartments, e.g. luggage or engine compartments - G01M 13/023: Power-transmitting endless elements, e.g. belts or chains - G01M 15/042: {by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12} - G01N 21/64: Fluorescence; Phosphorescence - G01N 21/8806: {Specially adapted optical and illumination features} - G01N 21/892: characterised by the flaw, defect or object feature examined - G01N 2201/062: LED's - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract An illumination apparatus for a vehicle is disclosed. The illumination apparatus comprises a wear component comprising a plurality of layers disposed in an engine compartment. The layers comprise a photoluminescent portion and a cover layer disposed over the photoluminescent portion. The apparatus further comprises a light source located in the engine compartment. The light source is configured to emit an excitation emission configured to illuminate the photoluminescent portion to emit an output emission having a color different than the excitation emission. ## Claims ### Claim 1 An illumination apparatus for a vehicle, comprising: a wear component comprising a plurality of layers configured to be disposed in an engine compartment, the layers comprising a photoluminescent portion and a cover layer configured to erode from an exterior surface of the wear component as a result of usage, wherein the cover layer is configured to suppress an illumination response to an excitation emission comprising a first wavelength of light, the cover layer disposed over the photoluminescent portion, wherein the cover layer encloses the photoluminescent portion and is configured to occlude the photoluminescent portion from the excitation emission; and a light source configured to be located in the engine compartment, the light source configured to emit the excitation emission configured to illuminate an exposed surface of the photoluminescent portion resulting from the erosion of the cover layer, wherein the exposed surface of the photoluminescent portion is configured to generate an output emission having a second wavelength different from the first wavelength. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the output emission is configured to be emitted from the exposed surface in the engine compartment providing an illuminated indication of a wear condition of the wear component. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the plurality of layers comprises a compression layer. ### Claim 4 (depends on 3) The apparatus according to claim 3, wherein the compression layer comprises a plurality of grooves configured to engage a pulley of an engine. ### Claim 5 (depends on 3) The apparatus according to claim 3, wherein the photoluminescent portion is incorporated as at least a portion of the compression layer. ### Claim 6 (depends on 3) The apparatus according to claim 3, wherein the plurality of layers comprises a cord layer configured to be enclosed in an insulation layer. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein the cord layer comprises a plurality of cords extending along a length of the wear component. ### Claim 8 (depends on 6) The apparatus according to claim 6, wherein the insulation layer is configured to laminate the cord layer to the compression layer. ### Claim 9 (depends on 6) The apparatus according to claim 6, wherein the photoluminescent portion forms at least a portion of the insulation layer. ### Claim 10 (depends on 6) The apparatus according to claim 6, wherein the photoluminescent portion forms at least a portion of the cord layer. ### Claim 11 (depends on 1) The apparatus according to claim 1, wherein the photoluminescent portion comprises a plurality of photoluminescent portions. ### Claim 12 (depends on 1) The apparatus according to claim 1, wherein the plurality of photoluminescent portions are configured to be disposed on more than one of the plurality of the layers of the wear component beneath the cover layer. ### Claim 13 A method of detecting wear in a wear component of a vehicle, comprising: utilizing a photoluminescent material in the wear component beneath a cover layer, wherein the cover layer is configured to suppress an illumination response to an excitation emission and occlude the photoluminescent portion from the excitation emission; submitting the wear component to friction until the cover layer is worn creating an exposed surface comprising the photoluminescent material; illuminating the exposed surface with the excitation emission in a first wavelength; and exciting the photoluminescent material with the excitation emission illuminating the exposed surface in a second wavelength different from the first wavelength. ### Claim 14 (depends on 13) The method according to claim 13, wherein the wear component comprises a belt. ### Claim 15 (depends on 14) The method according to claim 14, wherein the belt is formed of a plurality of layers comprising at least one photoluminescent portion comprising the photoluminescent material and comprising the cover layer forming an exterior layer of the belt. ### Claim 16 (depends on 14) The method according to claim 14, wherein the friction results from the belt passing over a pulley. ### Claim 17 (depends on 13) The method according to claim 13, further comprising activating the excitation emission in response to a user input activating a diagnostic process.