# US 10,479,348 B2 · Hybrid vehicle and method of reducing engine lugging > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,479,348 B2 - Document ID: US10479348B2 - Status: Granted - Kind: B2 - Application number: 15/044,338 - Filed: 2016-02-16 - Published: 2017-08-17 - Granted: 2019-11-19 - Earliest claimed: 2016-02-16 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Floyd Cadwell; Shunsuke Okubo; Carol Louise Okubo; Kimberly Trice - Web page: https://patentgrep.com/patent/US10479348B2 ## CPC - B60W 20/17: for noise reduction - B60K 6/24: characterised by the combustion engines - B60K 6/445: Differential gearing distribution type - B60W 10/06: including control of combustion engines - B60K 5/1208: {Resilient supports (B60K5/1241 - B60K5/1291 take precedence)} - B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} - B60W 2030/206: {related or induced by the engine} - B60W 2422/40: on a damper - B60W 2510/0652: Speed change rate - B60W 2510/0657: Engine torque - B60W 2510/0661: Torque change rate - B60W 2520/10: Longitudinal speed - B60W 2520/30: Wheel torque - B60W 2540/10: Accelerator pedal position - B60W 2710/0644: Engine speed - Y02T 10/62: Hybrid vehicles - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A vehicle includes an electric machine, an engine, an engine mount, and a controller. The engine has a base speed that corresponds to a speed of the electric machine and an engine power demand. The engine mount is disposed between the engine and a vehicle structure such as a frame or unibody. The controller is configured to, in response to compression of the engine mount, increase an engine speed to a value that is greater than the base speed to reduce engine lugging. ## Claims ### Claim 1 A vehicle comprising: an electric machine; an engine; an engine mount securing the engine to the vehicle; and a controller configured to, in response to compression of the engine mount, increase an engine speed to a value that is greater than a base engine speed corresponding to electric machine speed and engine power demand to reduce engine lugging. ### Claim 2 (depends on 1) The vehicle of claim 1, wherein the compression of the engine mount is an estimate based on a wheel torque demand and a vehicle speed. ### Claim 3 (depends on 1) The vehicle of claim 1, wherein the engine speed is increased by a value that is based on multiplying a scaling factor by a difference between the base engine speed and a minimized lugging engine speed. ### Claim 4 (depends on 3) The vehicle of claim 3, wherein the minimized lugging engine speed corresponds to an engine speed where engine lugging is reduced relative to the base speed when the engine mount is compressed. ### Claim 5 (depends on 3) The vehicle of claim 3, wherein the increase in engine speed is also based on ambient temperature. ### Claim 6 (depends on 3) The vehicle of claim 3, wherein the increase in engine speed is also based on road gradient. ### Claim 7 (depends on 1) The vehicle of claim 1, wherein the magnitude of the compression of the engine mount is a measured displacement of the engine relative to the vehicle. ### Claim 8 A vehicle comprising: an electric machine; an engine; an engine mount disposed between the engine and a vehicle structure; and a controller configured to, in response to compression of the engine mount, control engine speed based on a difference between a base engine speed and a minimized lugging engine speed to reduce engine lugging. ### Claim 9 (depends on 8) The vehicle of claim 8, wherein the controller increases engine speed by a value that is based on multiplying a scaling factor by the difference between the base engine speed and the minimized lugging engine speed. ### Claim 10 (depends on 9) The vehicle of claim 9, wherein the minimized lugging engine speed corresponds to an engine speed where engine lugging is reduced relative to the base engine speed for a corresponding wheel torque demand and vehicle speed. ### Claim 11 (depends on 9) The vehicle of claim 9, wherein the increase in engine speed is also based on ambient temperature. ### Claim 12 (depends on 9) The vehicle of claim 9, wherein the increase in engine speed is also based on road gradient. ### Claim 13 (depends on 8) The vehicle of claim 8, wherein the compression of the engine mount is based on a wheel torque demand and a vehicle speed. ### Claim 14 (depends on 8) The vehicle of claim 8, wherein the base engine speed is based on a speed of the electric machine and an engine power demand. ### Claim 15 A method of operating a hybrid powertrain having an engine and an electric machine comprising: increasing engine speed by a controller from a base speed associated with an electric machine speed and an engine power demand based on compression of an engine mount to reduce engine lugging. ### Claim 16 (depends on 15) The method of claim 15, further comprising inferring compression of the engine mount based on a wheel torque demand and a vehicle speed. ### Claim 17 (depends on 15) The method of claim 15, wherein the engine speed is increased by a value that is based on multiplying a scaling factor by a difference between the base speed and a minimized lugging engine speed. ### Claim 18 (depends on 17) The method of claim 17, wherein the minimized lugging engine speed corresponds to an engine speed where engine lugging is reduced relative to the base speed for corresponding engine power demand and motor speed. ### Claim 19 (depends on 17) The method of claim 17, wherein the increase in engine speed is also based on ambient temperature. ### Claim 20 (depends on 17) The method of claim 17, wherein the increase in engine speed is also based on road gradient.