# US 2019/0168761 A1 · Series hybrid vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168761 A1 - Document ID: US20190168761A1 - Status: Published application - Kind: A1 - Application number: 16/208,725 - Filed: 2018-12-04 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Yoshiaki ITO; Kosuke AIKI; Kisaburo HAYAKAWA; Hiroyuki YAMAGUCHI; Hideto INAGAKI; Masaki OKAMURA - Web page: https://patentgrep.com/patent/US20190168761A1 ## CPC - B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means - B60W 30/182: Selecting between different operative modes, e.g. comfort and performance modes - B60K 6/442: Series-parallel switching type - B60K 6/46: Series type - B60K 6/547: the transmission being a stepped gearing - B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles - B60W 10/02: including control of driveline clutches - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - 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 2006/4841: {the gear provides shifting between multiple ratios} - Y02T 10/62: Hybrid vehicles - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/72: Electric energy management in electromobility - 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 - 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 - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A series hybrid vehicle is equipped with an engine, a first motor generator, and a second motor generator. The vehicle has a reduction gear that is a first power transmission mechanism for engaging the engine with the first motor generator, a reduction gear that is a second power transmission mechanism for engaging the first motor generator with a vehicle drive shaft, and a clutch that is capable of engaging the first motor generator with one of the two reduction gears in a switching manner. The vehicle further has a transmission that switches between transmission gear ratios and engages the second motor generator with the vehicle drive shaft. ## Claims ### Claim 1 A series hybrid vehicle equipped with an engine, a first motor generator, and a second motor generator, the series hybrid vehicle comprising: a first power transmission mechanism that engages the engine with the first motor generator; a second power transmission mechanism that engages the first motor generator with a vehicle drive shaft; a clutch that is capable of engaging the first motor generator with one of the first power transmission mechanism and the second power transmission mechanism in a switching manner; and a transmission that switches between transmission gear ratios and engages the second motor generator with the vehicle drive shaft. ### Claim 2 (depends on 1) The series hybrid vehicle according to claim 1 further comprising a controller that changes traveling modes by switching engagement states of the clutch and the transmission, wherein the series hybrid vehicle includes, as the traveling modes, an EV traveling mode 1 in which the vehicle travels using one of the first motor generator and the second motor generator, an EV traveling mode 2 in which the vehicle travels using both the first motor generator and the second motor generator, an engine power generation mode in which the vehicle travels using the second motor generator while the engine and the first motor generator generate electric power, and a regeneration mode in which one or both of the first motor generator and the second motor generator regenerate electric power. ### Claim 3 (depends on 1) The series hybrid vehicle according to claim 1, wherein the first power transmission mechanism includes a first reduction gear that engages the engine with the vehicle drive shaft at a fixed reduction gear ratio, the second power transmission mechanism includes a second reduction gear that engages the first motor generator with the vehicle drive shaft at a fixed reduction gear ratio, and the clutch selects one of three states: the drive shaft of the first motor generator is engaged with the first reduction gear; the drive shaft of the first motor generator is engaged with the second reduction gear; and the drive shaft of the first motor generator is engaged with neither the first reduction gear nor the second reduction gear. ### Claim 4 (depends on 2) The series hybrid vehicle according to claim 2, wherein the first power transmission mechanism includes a first reduction gear that engages the engine with the vehicle drive shaft at a fixed reduction gear ratio, the second power transmission mechanism includes a second reduction gear that engages the first motor generator with the vehicle drive shaft at a fixed reduction gear ratio, and the clutch selects one of three states: the drive shaft of the first motor generator is engaged with the first reduction gear; the drive shaft of the first motor generator is engaged with the second reduction gear; and the drive shaft of the first motor generator is engaged with neither the first reduction gear nor the second reduction gear.