# US 10,371,218 B2 · Electromagnetic brake system for transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,218 B2 - Document ID: US10371218B2 - Status: Granted - Kind: B2 - Application number: 15/373,339 - Filed: 2016-12-08 - Published: 2018-05-03 - Granted: 2019-08-06 - Earliest claimed: 2016-11-01 - Assignees: Hyundai Motor Company - Applicants: Hyundai Motor Company - Inventors: Baekyu Kim; Seok Joon Kim; Junyoung Ha; Chulmin Ahn; SungGon Byun - Web page: https://patentgrep.com/patent/US10371218B2 ## CPC - F16D 63/002: {Brakes with direct electrical or electro-magnetic actuation} - B60K 6/365: with the gears having orbital motion - B60K 6/383: One-way clutches or freewheel devices - B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means - B60K 6/445: Differential gearing distribution type - F16H 3/725: {with means to change ratio in the mechanical gearing} - F16H 3/727: {with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path} - B60K 6/44: Series-parallel type - B60Y 2200/92: Hybrid vehicles - B60Y 2400/423: Electromagnetic clutches, e.g. powder type clutches - B60Y 2400/73: Planetary gearings - F16H 3/54: one of the central gears being internally toothed and the other externally toothed - F16H 2200/2005: with one sets of orbital gears - F16H 2200/2033: with one engaging means - F16H 2200/2035: with two engaging means - F16H 2200/2066: using one freewheel mechanism - F16H 2200/2082: one freewheel mechanisms - Y02T 10/62: Hybrid vehicles - Y10S 903/91: Orbital, e.g. planetary gears - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - F16H: GEARING - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract An electronic brake system includes an electromagnet housing in which an inner disk install end is integrally formed around the inside surface. An electromagnet is disposed inside of the electromagnet housing. A motor plate is installed at a motor/generator, and in which an outer disk install end disposed outside of the inner disk install end in a radial direction is integrally formed around one side surface. A disk unit is provided in which a plurality of the inner disks and the outer disks are overlapped between the inner disk install end and the outer disk install end to be combined each other through friction by virtual pressure. A piston is disposed according to the inside surface of the electromagnet housing, connected with a plunger being introduced along the support end of the rear cover, and operated by electromagnetic force of the electromagnet to supply virtual pressure to the disk unit. ## Claims ### Claim 1 An electronic brake system for a transmission, the electronic brake system comprising: an electromagnet housing to be fixed to a support end formed at an inside surface of a rear cover of the transmission, an inner disk install end being integrally formed around an inner surface of the electromagnet housing; an electromagnet disposed inside of the electromagnet housing; a motor plate installed at a motor/generator, an outer disk install end being disposed in the motor plate outside of the inner disk install end in a radial direction and integrally formed around one side surface; a disk unit in which a plurality of inner disks and outer disks are overlapped between the inner disk install end and the outer disk install end and to be combined together through friction by a pressing force; and a piston disposed according to an inside surface of the electromagnet housing, connected with a plunger that is introduced along the support end of the rear cover, and configured to operate by electromagnetic force of the electromagnet to supply the pressing force to the disk unit. ### Claim 2 (depends on 1) The electronic brake system of claim 1, wherein the electronic brake system is configured for a transmission for controlling power of a motor/generator in the transmission, the transmission including a plurality of motor/generators and a planetary gear set. ### Claim 3 (depends on 1) The electronic brake system of claim 1, further comprising an electromagnet cover integrally disposed outside of the electromagnet housing. ### Claim 4 (depends on 1) The electronic brake system of claim 1, further comprising a plurality of engagement bolts to attach the electromagnet housing to the inside surface of the rear cover. ### Claim 5 (depends on 1) The electronic brake system of claim 1, wherein a plurality of oil holes are formed on and around the support end of the rear cover. ### Claim 6 (depends on 1) The electronic brake system of claim 1, wherein the disk unit comprises: an inner disk inserted in an outer diameter portion of the inner disk install end; a plurality of outer disks disposed at both sides of the inner disk and inserted in an inner diameter portion of the outer disk install end; and a reaction disk inserted in the outer diameter portion of the inner disk install end between an inside outer disk of the plurality of the outer disks and the piston. ### Claim 7 (depends on 6) The electronic brake system of claim 6, further comprising a plurality of return springs interposed between the reaction disk and the inside surface of the electromagnet housing. ### Claim 8 (depends on 1) The electronic brake system of claim 1, further comprising a snap ring defining stroke of the piston integrally formed with the plunger and to be installed around inside tip end of the support end of the rear cover. ### Claim 9 (depends on 1) The electronic brake system of claim 1, wherein the piston includes a plurality of oil holes penetrating in a vertical direction along circumference according to an inner diameter portion of the inner disk install end. ### Claim 10 A vehicle comprising: a transmission including a rear cover, a plurality of motor/generators and a planetary gear set; an electromagnet housing fixed to a support end formed at an inside surface of the rear cover of the transmission, an inner disk install end being integrally formed around an inner surface of the electromagnet housing; an electromagnet disposed inside of the electromagnet housing; a motor plate installed at the motor/generator of the transmission, an outer disk install end being disposed in the motor plate outside of the inner disk install end in a radial direction and integrally formed around one side surface; a disk unit in which a plurality of the inner disks and the outer disks are overlapped between the inner disk install end and the outer disk install end and to be combined together through friction by a pressing force; and a piston disposed according to an inside surface of the electromagnet housing, connected with a plunger that is introduced along a support end of the rear cover, and configured to operate by electromagnetic force of the electromagnet to supply the pressing force to the disk unit. ### Claim 11 (depends on 10) The vehicle of claim 10, further comprising an electromagnet cover integrally disposed outside of the electromagnet housing. ### Claim 12 (depends on 10) The vehicle of claim 10, wherein the electromagnet housing is engaged to the inside surface of the rear cover by a plurality of engagement bolts. ### Claim 13 (depends on 10) The vehicle of claim 10, wherein a plurality of oil holes are formed on and around the support end of the rear cover. ### Claim 14 (depends on 10) The vehicle of claim 10, wherein the disk unit comprises: an inner disk inserted in an outer diameter portion of the inner disk install end; a plurality of outer disks disposed at both sides of the inner disk and inserted in an inner diameter portion of the outer disk install end; and a reaction disk inserted in the outer diameter portion of the inner disk install end between an inside outer disk of the plurality of the outer disks and the piston. ### Claim 15 (depends on 14) The vehicle of claim 14, further comprising a plurality of return springs interposed between the reaction disk and the inside surface of the electromagnet housing. ### Claim 16 (depends on 10) The vehicle of claim 10, further comprising a snap ring defining stroke of the piston integrally formed with the plunger and installed around inside tip end of the support end of the rear cover. ### Claim 17 (depends on 10) The vehicle of claim 10, wherein the piston includes a plurality of oil holes penetrating in a vertical direction along circumference according to an inner diameter portion of the inner disk install end. ### Claim 18 (depends on 1) The electronic brake system of claim 1, wherein the electromagnet housing is fixed to a support end formed at an inside surface of a rear cover of the transmission. ### Claim 19 (depends on 1) A vehicle comprising: the electronic brake system of claim 1; and a transmission having a rear cover, wherein the electromagnet housing is fixed to a support end formed at an inside surface of the rear cover of the transmission.