# US 10,502,287 B2 · Belt slip monitor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,287 B2 - Document ID: US10502287B2 - Status: Granted - Kind: B2 - Application number: 15/647,406 - Filed: 2017-07-12 - Published: 2017-10-26 - Granted: 2019-12-10 - Earliest claimed: 2014-03-11 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Anthemios Philemon Petridis; Donatus Andreas Josephine Kees - Web page: https://patentgrep.com/patent/US10502287B2 ## CPC - F16H 7/08: Means for varying tension of belts, ropes or chains (pulleys of adjustable construction F16H55/52) - F02N 19/00: Starting aids for combustion engines, not otherwise provided for - G01L 5/04: for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands {(G01L5/0004 takes precedence)} - F02B 67/06: driven by means of chains, belts, or like endless members - F02N 11/006: {using a plurality of electric motors} - F02N 11/04: the motors being associated with current generators - F02N 11/0825: {related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state} - F16H 2007/0861: {comprising means for sensing tensioner position} - F16H 2007/0885: {the tension being a function of engine running condition} - F16H 2007/0897: {External to internal direction} - F16H: GEARING - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) ## Abstract A belt slip monitor system and method configured to determine whether a belt coupled to a motor-generator is slipping based on operational states of first and second movable portions of the belt slip monitor, wherein the operational states of the first and second movable portions are dependent upon the tension in the belt. ## Claims ### Claim 1 A belt slip monitor for a belt coupled to a motor-generator, the belt slip monitor comprising: a first movable portion movable with respect to the motor-generator; a second movable portion movably coupled to the first movable portion, the second movable portion being coupled to the belt such that operational states of the first and second movable portions of the belt slip monitor are dependent upon a tension in the belt; a first sensor configured to determine the operational state of the first movable portion; and a second sensor configured to determine the operational state of the second movable portion, wherein the belt slip monitor is configured to determine whether the belt is slipping based on the operational states of the first and second movable portions. ### Claim 2 (depends on 1) The belt slip monitor of claim 1, wherein the belt slip monitor is configured to determine if the belt coupled to the motor-generator is slipping. ### Claim 3 (depends on 2) The belt slip monitor of claim 2, the belt slip monitor further comprising one or more control devices configured to adjust an operational torque of the motor-generator in response to the operational state of the first and/or second movable portion of the belt slip monitor, such that the belt does not slip. ### Claim 4 (depends on 1) The belt slip monitor of claim 1, wherein the second movable portion is coupled to the belt at a first end of the second movable portion and is coupled to the belt at a second end of the second movable portion. ### Claim 5 (depends on 4) The belt slip monitor of claim 4, wherein the first and second ends of the second movable portion are coupled to the belt on either side of the motor-generator. ### Claim 6 (depends on 1) The belt slip monitor of claim 1, wherein the tension in the belt is dependent upon an operational torque of the motor-generator. ### Claim 7 (depends on 1) The belt slip monitor of claim 1, wherein at least a portion of the first sensor is attachable to the first movable portion and at least a portion of the second sensor is attachable to the second movable portion. ### Claim 8 (depends on 1) The belt slip monitor of claim 1, wherein the first movable portion is coupled to an anchor point that is fixed relative to movement of the motor-generator. ### Claim 9 (depends on 1) The belt slip monitor of claim 1, wherein the first and second movable portions are configured to move with respect to the belt. ### Claim 10 (depends on 1) The belt slip monitor of claim 1, wherein the first and second movable portions are rotationally and/or slidably movable. ### Claim 11 (depends on 10) The belt slip monitor of claim 10, wherein the first and second movable portions are rotationally and/or slidably coupled to each other, and wherein the second movable portion comprises one or more pulleys for engaging the belt. ### Claim 12 (depends on 1) The belt slip monitor of claim 1, wherein the belt slip monitor is configured to apply a pretension to the belt. ### Claim 13 (depends on 1) The belt slip monitor of claim 1, wherein the first and second sensors comprise angle sensors configured to determine an angular position of the first and/or second movable portion. ### Claim 14 (depends on 1) The belt slip monitor of claim 1, wherein the first and second sensors comprise strain gauges configured to determine a strain in the first and/or second movable portion, and wherein the motor-generator comprises an integrated starter-generator. ### Claim 15 (depends on 1) The belt slip monitor of claim 1, wherein the first and/or second movable portions are coupled to an engine of a vehicle, wherein the belt is an accessory drive belt.