# US 2019/0168743 A1 · Method for Departing from a Recuperation Phase in a Parallel Hybrid Vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168743 A1 - Document ID: US20190168743A1 - Status: Published application - Kind: A1 - Application number: 16/264,398 - Filed: 2019-01-31 - Published: 2019-06-06 - Earliest claimed: 2016-08-01 - Assignees: Bayerische Motoren Werke Aktiengesellschaft - Applicants: Bayerische Motoren Werke Aktiengesellschaft - Inventors: Michael FRIEDRICH; Benjamin KLUGE; Sebastian LIEBERT - Web page: https://patentgrep.com/patent/US20190168743A1 ## CPC - 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)} - B60K 6/30: characterised by chargeable mechanical accumulators, e.g. flywheels - B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means - B60K 6/48: Parallel type - B60W 10/02: including control of driveline clutches - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/10: including control of change-speed gearings - B60W 10/11: Stepped gearings - B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} - 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 30/18127: {Regenerative braking} - F02N 11/0822: {related to action of the driver} - F02N 15/02: Gearing between starting-engines and started engines; Engagement or disengagement thereof - B60K 2006/4825: {Electric machine connected or connectable to gearbox input shaft} - B60W 2520/10: Longitudinal speed - B60W 2540/10: Accelerator pedal position - B60W 2540/12: Brake pedal position - B60W 2710/021: Clutch engagement state - B60W 2710/0644: Engine speed - B60W 2710/1005: Transmission ratio engaged - B60W 2710/1011: Input shaft speed, e.g. turbine speed - B60Y 2200/92: Hybrid vehicles - F02N 2200/041: Starter speed - F02N 2200/0801: Vehicle speed - F02N 2200/101: Accelerator pedal position - F02N 2200/102: Brake pedal position - Y02T 10/40: Engine management systems - Y02T 10/62: Hybrid vehicles - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - 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 - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method for exiting from a recuperation phase in a parallel hybrid vehicle includes, in a first step, the vehicle is in a recuperation phase, started by means of a trigger, with a predefined recuperation driving demand, and, in a second step, the electric machine is brought to an increased rotational speed during the recuperation phase. In a third step, a phase for departing from the recuperation phase is started by means of a trigger, wherein, in this phase, the internal combustion engine is made available for coupling to the electric machine, such that a target rotational speed determined between the internal combustion engine to be connected and the electric machine for the connection to the transmission input is set, and in parallel, by means of an upshift, a highest possible gear ratio for the connection to the drivetrain is set, in order to satisfy a present driving demand. In a fourth step, the departure from the recuperation phase is completed. ## Claims ### Claim 1 A method for exiting a recuperation phase in a parallel hybrid vehicle, comprising an internal combustion engine and an electric machine which can be coupled thereto via a clutch with interaction with a device for shock isolation, comprising at least one flywheel mass and one second clutch, which electric machine can be connected to a transmission which is connected to a drive train, wherein the internal combustion engine can be completely decoupled from the electric machine using the clutch, wherein the method comprises: in a first step the vehicle is in a recuperation phase, started by a trigger, with a predefined recuperation driving request, in a second step, the electric machine is brought to an increased rotational speed during the recuperation phase, in a third step, a phase for exiting the recuperation phase is started by a trigger, wherein in the phase for exiting the recuperation phase, the internal combustion engine is made available for coupling to the electric machine in that the second clutch is opened, and when the latter is open, the clutch is closed, with the result that the start of the internal combustion engine is carried out as a pulse start in such a way that a target rotational speed which is determined between an internal combustion engine which is to be connected and a flywheel mass for connecting to the transmission input is set, and in parallel a maximum possible gearspeed for connecting to the drive train is set by means of a gearspeed upshift, in order to satisfy a present driving request, and in a fourth step, the second clutch is closed in a controlled fashion, with the result that the exit from the recuperation phase is completed. ### Claim 2 A method for exiting a recuperation phase in a parallel hybrid vehicle comprising an internal combustion engine and an electric machine which can be coupled thereto via a clutch and which can be connected to a transmission which is connected to a drive train, wherein the internal combustion engine can be completely decoupled from the electric machine using the clutch, wherein the method comprises: in a first step, the vehicle is in a recuperation phase, started by a trigger, with a predefined recuperation driving request, in a second step, the electric machine is brought to an increased rotational speed during the recuperation phase, in a third step a phase for exiting the recuperation phase is started by a trigger, wherein in the phase for existing the recuperation phase, the internal combustion engine is made available for coupling to the electric machine, controlled closing of the clutch and application of positive torque in the electric machine takes place, with the result that the start of the internal combustion engine is carried out as a supported pulse start in such a way that a target rotational speed which is determined between the internal combustion engine to be connected and the electric machine is set for connecting to the transmission input, and in parallel a maximum possible gearspeed for connecting to the drive train is set by means of a gearspeed upshift, in order to satisfy a driving request, and in a fourth step, the clutch is closed completely, with the result that the exit from the recuperation phase is completed. ### Claim 3 (depends on 2) The method as claimed in claim 2, wherein in the third step, in the phase for exiting the recuperation phase, the controlled closing of the clutch is carried out by placing the clutch in a slipping state. ### Claim 4 (depends on 2) The method as claimed in claim 2, wherein in the fourth step, in the case of the driving request of an overrun upshift, the method comprises closing the clutch with a coupling rotational speed between the internal combustion engine and the electric machine below the target rotational speed of the new gearspeed, and in the case of the driving request of a traction request with a coupling rotational speed between the internal combustion engine and electric machine above the target rotational speed of the new gearspeed said clutch is closed. ### Claim 5 (depends on 3) The method as claimed in claim 3, wherein in the fourth step, in the case of the driving request of an overrun upshift, the method comprises closing the clutch with a coupling rotational speed between the internal combustion engine and the electric machine below the target rotational speed of the new gearspeed, and in the case of the driving request of a traction request with a coupling rotational speed between the internal combustion engine and electric machine above the target rotational speed of the new gearspeed said clutch is closed. ### Claim 6 (depends on 2) The method as claimed in claim 2, wherein in the third step, for the assisted pulse start the kinetic energy from the pulse of the electric machine in conjunction with involved transmission components and the available torque of the electric machine are used. ### Claim 7 (depends on 3) The method as claimed in claim 3, wherein in the third step, for the assisted pulse start the kinetic energy from the pulse of the electric machine in conjunction with involved transmission components and the available torque of the electric machine are used. ### Claim 8 (depends on 4) The method as claimed in claim 4, wherein in the third step, for the assisted pulse start the kinetic energy from the pulse of the electric machine in conjunction with involved transmission components and the available torque of the electric machine are used. ### Claim 9 (depends on 1) The method as claimed in claim 1, wherein at the entry into the recuperation phase, the method comprises adjusting the gearspeed by one or more gearspeed downshifts to a gearspeed below the gearspeed which was at least intended for the re coupling of the internal combustion engine. ### Claim 10 (depends on 2) The method as claimed in claim 2, wherein at the entry into the recuperation phase, the method comprises adjusting the gearspeed by one or more gearspeed downshifts to a gearspeed below the gearspeed which was at least intended for the re coupling of the internal combustion engine. ### Claim 11 (depends on 3) The method as claimed in claim 3, wherein at the entry into the recuperation phase, the method comprises adjusting the gearspeed by one or more gearspeed downshifts to a gearspeed below the gearspeed which was at least intended for the re coupling of the internal combustion engine. ### Claim 12 (depends on 1) The method as claimed in claim 1, wherein the trigger for entering the recuperation phase is activation of the brake pedal, and in order to exit the recuperation phase the trigger is a reduction in or termination of the activation of the brake pedal, activation of accelerator pedal or an undershooting of a speed threshold. ### Claim 13 (depends on 2) The method as claimed in claim 2, wherein the trigger for entering the recuperation phase is activation of the brake pedal, and in order to exit the recuperation phase the trigger is a reduction in or termination of the activation of the brake pedal, activation of accelerator pedal or an undershooting of a speed threshold. ### Claim 14 (depends on 3) The method as claimed in claim 3, wherein the trigger for entering the recuperation phase is activation of the brake pedal, and in order to exit the recuperation phase the trigger is a reduction in or termination of the activation of the brake pedal, activation of accelerator pedal or an undershooting of a speed threshold. ### Claim 15 (depends on 1) The method as claimed in claim 1, wherein during the recuperation phase, the method comprises adjusting the gearspeed such that the at least necessary kinetic energy of the electric machine is kept available in order to implement the pulse start request. ### Claim 16 (depends on 2) The method as claimed in claim 2, wherein during the recuperation phase, the method comprises adjusting the gearspeed such that the at least necessary kinetic energy of the electric machine is kept available in order to implement the pulse start request. ### Claim 17 (depends on 3) The method as claimed in claim 3, wherein during the recuperation phase, the method comprises adjusting the gearspeed such that the at least necessary kinetic energy of the electric machine is kept available in order to implement the pulse start request. ### Claim 18 A parallel hybrid vehicle comprising: an internal combustion engine and an electric machine which can be coupled thereto via a clutch and which is connected to a transmission which is connected to a drive train, wherein the internal combustion engine can be completely decoupled from the electric machine using the clutch, at least one sensing device, control device and execution device respectively configured to sense a trigger for entering and exiting a recuperation phase, and transmitting, receiving and processing signals, wherein the vehicle is configured such that: in a first step, the vehicle is in a recuperation phase, started by a trigger, with a predefined recuperation driving request, in a second step, the electric machine is brought to an increased rotational speed during the recuperation phase, in a third step a phase for exiting the recuperation phase is started by a trigger, wherein in the phase for existing the recuperation phase, the internal combustion engine is made available for coupling to the electric machine, controlled closing of the clutch and application of positive torque in the electric machine takes place, with the result that the start of the internal combustion engine is carried out as a supported pulse start in such a way that a target rotational speed which is determined between the internal combustion engine to be connected and the electric machine is set for connecting to the transmission input, and in parallel a maximum possible gearspeed for connecting to the drive train is set by means of a gearspeed upshift, in order to satisfy a driving request, and in a fourth step, the clutch is closed completely, with the result that the exit from the recuperation phase is completed. ### Claim 19 A parallel hybrid vehicle comprising an internal combustion engine and an electric machine which can be coupled thereto via a clutch with interaction with a device for shock isolation, comprising at least one flywheel mass and one second clutch, which electric machine is connected to a transmission which is connected to a drive train, wherein the internal combustion engine can be completely decoupled from the electric machine using the clutch with interaction with the device for shock isolation, at least one sensing device, control device and execution device respectively configured to sense a trigger for entering and exiting a recuperation phase, and transmitting, receiving and processing signals, wherein the vehicle is configured such that: in a first step the vehicle is in a recuperation phase, started by the sensed trigger, with a predefined recuperation driving request, in a second step, the electric machine is brought to an increased rotational speed during the recuperation phase, in a third step, a phase for exiting the recuperation phase is started by a trigger, wherein in the phase for exiting the recuperation phase, the internal combustion engine is made available for coupling to the electric machine in that the second clutch is opened, and when the latter is open, the clutch is closed, with the result that the start of the internal combustion engine is carried out as a pulse start in such a way that a target rotational speed which is determined between an internal combustion engine which is to be connected and a flywheel mass for connecting to the transmission input is set, and in parallel a maximum possible gearspeed for connecting to the drive train is set by means of a gearspeed upshift, in order to satisfy a present driving request, and in a fourth step, the second clutch is closed in a controlled fashion, with the result that the exit from the recuperation phase is completed.