# US 2021/0276537 A1 · Drive device for hybrid vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0276537 A1 - Document ID: US20210276537A1 - Status: Published application - Kind: A1 - Application number: 17/190,943 - Filed: 2021-03-03 - Published: 2021-09-09 - Earliest claimed: 2020-03-05 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Yoshio HASEGAWA; Takeshi AKIRA - Web page: https://patentgrep.com/patent/US20210276537A1 ## CPC - 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)} - B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means - B60K 6/48: Parallel type - B60K 6/547: the transmission being a stepped gearing - B60L 1/003: {to auxiliary motors, e.g. for pumps, compressors} - B60L 15/007: {Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles} - B60W 10/023: {Fluid clutches} - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/11: Stepped gearings - B60W 10/115: with planetary gears - B60W 10/30: including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps - 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 30/19: Improvement of gear change, e.g. by synchronisation or smoothing gear shift - F16H 61/0437: {by using electrical signals (F16H61/0403 and F16H61/061 take precedence)} - F16H 63/50: Signals to an engine or motor - B60K 2006/4825: {Electric machine connected or connectable to gearbox input shaft} - B60W 2030/203: {related or induced by the clutch} - B60W 2050/0042: {Transfer function lag; delays} - B60W 2510/0208: Clutch engagement state, e.g. engaged or disengaged - B60W 2510/081: Speed - B60W 2520/10: Longitudinal speed - B60W 2710/021: Clutch engagement state - B60W 2710/081: Speed - B60Y 2200/92: Hybrid vehicles - F16H 2061/0488: {during range shift from neutral (N) to drive (D)} - Y02T 10/62: Hybrid vehicles - Y02T 10/64: Electric machine technologies in electromobility - Y02T 10/72: Electric energy management in electromobility - 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 - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - F16H: GEARING - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An ECU executes a first control when an automatic transmission has a shift range changed from an N range to a D range. In the first control, the ECU initially rotates an EOP and also sets a motor generator's rotational speed to a prescribed rotational speed. The ECU rapidly engages a Drive clutch while maintaining the motor generator's rotational speed at the prescribed rotational speed. The ECU then increases the motor generator's rotational speed to a target rotational speed set for the D range. ## Claims ### Claim 1 A drive device for a hybrid vehicle, comprising: an internal combustion engine; an electric motor; an automatic transmission that transmits power of at least one of the internal combustion engine and the electric motor to a driving wheel; a first engagement element provided between the internal combustion engine and the electric motor; an electrically driven hydraulic pressure source that supplies hydraulic pressure to the first engagement element and engagement elements included in the automatic transmission; and a control device that controls the electric motor and the electrically driven hydraulic pressure source, wherein when the automatic transmission has a shift range changed and the first engagement element is disengaged, the control device executes a prescribed control, and in the prescribed control, the control device sets a rotational speed of the electric motor to be equal to or lower than a prescribed rotational speed, switches an engagement state of the engagement elements included in the automatic transmission to an engagement state corresponding to the changed shift range, and increases the rotational speed of the electric motor to a target rotational speed corresponding to the changed shift range. ### Claim 2 (depends on 1) The drive device for a hybrid vehicle according to claim 1, wherein the control device stops the electric motor when the shift range of the automatic transmission is a neutral range or a parking range, the control device executes a first control as the prescribed control when the shift range of the automatic transmission is changed from the neutral range or the parking range to a forward drive range or a reverse drive range and the first engagement element is disengaged, and in the first control, the control device continues to stop the electric motor, switches an engagement state of the engagement elements included in the automatic transmission to an engagement state corresponding to the changed shift range, and increases a rotational speed of the electric motor to the target rotational speed. ### Claim 3 (depends on 1) The drive device for a hybrid vehicle according to claim 1, further comprising a mechanically driven hydraulic pressure source that operates using the internal combustion engine or the electric motor as a power source, wherein the control device stops the electric motor when the shift range of the automatic transmission is a neutral range or a parking range, the control device executes a first control as the prescribed control when the shift range of the automatic transmission is changed from the neutral range or the parking range to a forward drive range or a reverse drive range and the first engagement element is disengaged, and in the first control, the control device increases a rotational speed of the electric motor to the prescribed rotational speed, switches an engagement state of the engagement elements included in the automatic transmission to an engagement state corresponding to the changed shift range, and increases the rotational speed of the electric motor to the target rotational speed. ### Claim 4 (depends on 2) The drive device for a hybrid vehicle according to claim 2, wherein the control device does not execute the first control when the shift range of the automatic transmission is changed from the neutral range or the parking range to the forward drive range or the reverse drive range and the first engagement element is not disengaged. ### Claim 5 (depends on 1) The drive device for a hybrid vehicle according to claim 1, wherein when the shift range of the automatic transmission is a forward drive range or a reverse drive range and an accelerator pedal is not operated, the control device causes the electric motor to rotate at a target rotational speed corresponding to the selected shift range, when the shift range of the automatic transmission is changed between the forward drive range and the reverse drive range and the first engagement element is disengaged, the control device executes a second control as the prescribed control, and in the second control, the control device reduces the rotational speed of the electric motor to the prescribed rotational speed, switches an engagement state of the engagement elements included in the automatic transmission to an engagement state corresponding to the changed shift range, and increases the rotational speed of the electric motor to the target rotational speed. ### Claim 6 (depends on 5) The drive device for a hybrid vehicle according to claim 5, wherein the control device does not execute the second control when the shift range of the automatic transmission is changed between the forward drive range and the reverse drive range and the first engagement element is not disengaged. ### Claim 7 (depends on 5) The drive device for a hybrid vehicle according to claim 5, wherein the control device does not execute the second control when the hybrid vehicle has a vehicular speed larger than a threshold value. ### Claim 8 (depends on 1) The drive device fir a hybrid vehicle according to claim 1, wherein when the shift range of the automatic transmission is changed, the first engagement element is disengaged, and the internal combustion engine is actuated after the shift range is changed, the control device sets a rotational speed of the electric motor to be equal to or lower than a prescribed rotational speed, engages the first engagement element, switches an engagement state of the engagement elements included in the automatic transmission to an engagement state corresponding to the changed shift range, and increases the rotational speed of the electric motor to a target rotational speed corresponding to the changed shift range.