# US 2014/0190781 A1 · Electromagnetic axle disconnect system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190781 A1 - Document ID: US20140190781A1 - Status: Published application - Kind: A1 - Application number: 14/150,064 - Filed: 2014-01-08 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: Dana Automotive Systems Group, LLC - Applicants: Dana Automotive Systems Group, LLC - Inventors: Mitchell R. Lawson; Julius L. Jones; Rick C. Sigmon - Web page: https://patentgrep.com/patent/US20140190781A1 ## CPC - F16D 27/118: with interengaging jaws or gear teeth - F16D 2011/006: {Locking or detent means, i.e. means to keep the clutch in engaged condition} - Y10T 29/49826: Assembling or joining - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An electromagnetic disconnect system has an output housing having an armature with a coil and an output shaft bearing fixed to it. A pressure plate and a sliding dog clutch are slidably attached to an output shaft that is in rotational contact with the output shaft bearing. This system further has an input housing attached to the output housing. The input housing has an input shaft bearing fixed to it. The electromagnetic disconnect system further has a disengagement spring and an axially fixed dog clutch rigidly attached to an end of an input shaft that is axially dispose through an opening in the input housing and in rotational contact with the input shaft bearing. ## Claims ### Claim 1 A vehicle axle electromagnetic disconnect system, comprising: an output housing having an armature with a coil and an output shaft bearing fixedly attached thereto; an output shaft having splines disposed on an end thereof, wherein a pressure plate and a sliding dog clutch are slidably attach to the output shaft, and the output shaft axially disposed through an opening in the output housing and in rotational contact with the output shaft bearing; an input housing fixedly attached to the output housing, the input housing having an input shaft bearing fixedly attached thereto; and a disengagement spring and an axially fixed dog clutch rigidly attached to an end of an input shaft that is axially disposed through an opening in the input housing and in rotational contact with the input shaft bearing. ### Claim 2 (depends on 1) The vehicle axle electromagnetic disconnect system of claim 1, wherein the sliding dog clutch is in mechanical engagement with the axially fixed dog clutch. ### Claim 3 (depends on 1) The vehicle axle electromagnetic disconnect system of claim 1, wherein the cams on the output shaft are self-lockable. ### Claim 4 (depends on 1) The vehicle axle electromagnetic disconnect system of claim 1, wherein the spring is mechanically disengaged with the pressure plate, sliding dog clutch, and armature, which in turn are mechanically disengaged from the axially fixed dog clutch. ### Claim 5 (depends on 4) The vehicle axle electromagnetic disconnect system of claim 4, wherein the input shaft is disengaged from the output shaft. ### Claim 6 (depends on 1) The vehicle axle electromagnetic disconnect system of claim 1, wherein a vehicle axle electromagnetic disconnect system has a response time of no more than 200 milliseconds along a torque path from wheels to a ring gear, during normal driving conditions, from a received start command signal. ### Claim 7 A method of forming a vehicle axle electromagnetic disconnect system, comprising: fixedly attaching an armature with a coil and an output shaft bearing to an output housing; slidably attaching a pressure plate and a sliding dog clutch to an output shaft having splines disposed on an end thereof; axially disposing an output shaft through an opening in the output housing, wherein the output shaft is in rotational contact with the output shaft bearing; fixedly attaching an input housing to the output housing; fixedly attaching an input shaft bearing to the input housing; and rigidly attaching a disengagement spring and an axially fixed dog clutch to an end of an input shaft that is axially disposed through an opening in the input housing and that is in rotational contact with the input shaft bearing. ### Claim 8 (depends on 7) The method of operating the vehicle axle electromagnetic disconnect system of claim 7, further comprising energizing the coil of the armature to slidably move the pressure plate and sliding dog clutch into mechanical engagement with the axially fixed dog clutch, thereby transferring rotational torque from the input shaft to the output shaft. ### Claim 9 (depends on 7) The method of operating the vehicle axle electromagnetic disconnect system of claim 7, wherein the output shaft has cams that provide a self-locking force on the output shaft, thereby allowing a force being applied to the movable clutch member to be reduced or eliminated. ### Claim 10 (depends on 7) The method of operating the vehicle axle electromagnetic disconnect system of claim 7, further comprising de-energizing the coil by way of the disengagement spring, thereby mechanically disengaging the pressure plate, sliding dog clutch, and armature from the axially fixed dog clutch. ### Claim 11 (depends on 10) The method of operating the vehicle axle electromagnetic disconnect system of claim 10, further comprising disengaging rotational torque from the input shaft to the output shaft. ### Claim 12 (depends on 7) The vehicle axle electromagnetic disconnect system of claim 7, further comprising connecting a torque path from wheels to a ring gear during normal driving conditions, in no more than 200 milliseconds, from a received start command signal.