# US 2017/0282900 A1 · Driving control mechanism and driving control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282900 A1 - Document ID: US20170282900A1 - Status: Published application - Kind: A1 - Application number: 15/448,807 - Filed: 2017-03-03 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: Fuji Jukogyo Kabushiki Kaisha - Applicants: Fuji Jukogyo Kabushiki Kaisha - Inventors: Hiroyuki SUZUKI; Wataru INOUE - Web page: https://patentgrep.com/patent/US20170282900A1 ## CPC - B60W 20/15: Control strategies specially adapted for achieving a particular effect - B60K 6/48: Parallel type - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/107: with endless flexible members - B60W 20/30: Control strategies involving selection of transmission gear ratio {(control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H)} - B60W 20/40: Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers {(power-up or power-down of the driveline B60W30/192)} - B60W 30/20: Reducing vibrations in the driveline - B60W 2510/083: Torque - B60W 2510/244: Charge state - B60W 2710/083: Torque - B60W 2710/1005: Transmission ratio engaged - B60Y 2200/92: Hybrid vehicles - Y02T 10/62: Hybrid vehicles - Y02T 10/72: Electric energy management in electromobility - Y10S 903/93: Conjoint control of different elements - Y10S 903/945: Characterized by control of gearing, e.g. control of transmission ratio - 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 - 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 A driving control mechanism includes: a motor that is coupled to a driving wheel; a transmission that is coupled to the driving wheel; and an internal combustion engine that is coupled to an input shaft of the transmission. In a first state in which a driving force of the motor is transmitted to the driving wheel and a driving force of the internal combustion engine is not transmitted to the driving wheel, the transmission reduces a transmission gear ratio to a value less than a target transmission gear ratio according to a requested driving force when a transition request to a second state in which driving forces of the motor and the internal combustion engine are transmitted to the driving wheel is issued. The motor increases a driving force to be transmitted to the driving wheel when the transition request is issued. ## Claims ### Claim 1 A driving control mechanism comprising: a motor that is coupled to a driving wheel; a transmission that is coupled to the driving wheel; and an internal combustion engine that is coupled to an input shaft of the transmission, wherein, in a first state in which a driving force of the motor is transmitted to the driving wheel and a driving force of the internal combustion engine is not transmitted to the driving wheel, the transmission reduces a transmission gear ratio to a value less than a target transmission gear ratio according to a requested driving force when a transition request to a second state in which driving forces of the motor and the internal combustion engine are transmitted to the driving wheel is issued, and wherein the motor increases a driving force to be transmitted to the driving wheel when the transition request is issued. ### Claim 2 (depends on 1) The driving control mechanism according to claim 1, wherein, when the transition request is issued, the transmission reduces a transmission gear ratio to a value slightly above a transmission gear ratio at which a rotation speed of the input shaft becomes a rotation speed at which the internal combustion engine stops. ### Claim 3 (depends on 1) The driving control mechanism according to claim 1, wherein, when the transition request is issued, the transmission reduces a transmission gear ratio to a value less than the target transmission gear ratio before a driving force of the internal combustion engine is transmitted to the driving wheel. ### Claim 4 (depends on 1) The driving control mechanism according to claim 1, wherein the transmission reduces a transmission gear ratio to a value less than the target transmission gear ratio in a case where the motor increases a driving force. ### Claim 5 (depends on 4) The driving control mechanism according to claim 4, wherein the motor increases a driving force in a case where an output of the motor after increasing the driving force is an upper limit or less. ### Claim 6 (depends on 4) The driving control mechanism according to claim 4, wherein the motor increases a driving force in a case where a value related to an electric power stored in a battery to be used for driving the motor is a threshold or more. ### Claim 7 (depends on 1) The driving control mechanism according to claim 1, wherein the motor increases a driving force by a value more than or equal to a difference between the requested driving force and a driving force after reducing a transmission gear ratio. ### Claim 8 (depends on 1) The driving control mechanism according to claim 1, wherein the motor changes a driving force in accordance with a change in a transmission gear ratio. ### Claim 9 (depends on 1) The driving control mechanism according to claim 1, wherein the transmission changes a transmission gear ratio back to the target transmission gear ratio after transitioning to the second state. ### Claim 10 (depends on 9) The driving control mechanism according to claim 9, wherein the transmission changes a transmission gear ratio back to the target transmission gear ratio more gently than a change for reducing a transmission gear ratio. ### Claim 11 A driving control device comprising: a determination module that determines presence or absence of a transition request to a second state in which driving forces of a motor and an internal combustion engine are transmitted to a driving wheel, in a first state in which a driving force of the motor is transmitted to the driving wheel and a driving force of the internal combustion engine is not transmitted to the driving wheel; and a controller that outputs a command to reduce a transmission gear ratio of a transmission to a value less than a target transmission gear ratio according to a requested driving force, and outputs a command to increase a driving force to be transmitted from the motor to the driving wheel, when the determination module determines that the transmission request has been issued. ### Claim 12 A driving control device comprising circuitry configured to determine presence or absence of a transition request to a second state in which driving forces of a motor and an internal combustion engine are transmitted to a driving wheel, in a first state in which a driving force of the motor is transmitted to the driving wheel and a driving force of the internal combustion engine is not transmitted to the driving wheel; and output a command to reduce a transmission gear ratio of a transmission to a value less than a target transmission gear ratio according to a requested driving force, and output a command to increase a driving force to be transmitted from the motor to the driving wheel, when it is determined that the transmission request has been issued.