# US 11,440,394 B2 · Vehicle drive system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,394 B2 - Document ID: US11440394B2 - Status: Granted - Kind: B2 - Application number: 16/682,435 - Filed: 2019-11-13 - Published: 2020-05-21 - Granted: 2022-09-13 - Earliest claimed: 2018-11-16 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Hiroshi Yaguchi; Naoyuki Kishimoto; Naoki Marukawa; Shuichi Iwata - Web page: https://patentgrep.com/patent/US11440394B2 ## CPC - B60K 1/00: Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) - B60K 6/26: characterised by the motors or the generators - B60K 1/02: comprising more than one electric motor - B60K 6/405: Housings - B60K 6/445: Differential gearing distribution type - B60L 15/007: {Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles} - B60K 2001/003: {with means for cooling the electrical propulsion units} - B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles - B60L 2210/10: DC to DC converters - B60Y 2200/92: Hybrid vehicles - B60Y 2306/05: Cooling - 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 - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract A vehicle drive system includes: a case accommodating a first rotary electric machine and a second rotary electric machine that are arranged to have respective rotational axes parallel to each other and to be radially adjacent to each other; and a power control device configured to control the first rotary electric machine and the second rotary electric machine. The case includes a peripheral wall portion surrounding the first rotary electric machine and the second rotary electric machine, and the power control device is mounted in a mounting section provided on an outer peripheral surface of the peripheral wall portion. A lower part of the power control device is located in a space surrounded by a line connecting a first cross point, and a second cross point, the first rotary electric machine and the second rotary electric machine. ## Claims ### Claim 1 A vehicle drive system, comprising: a case accommodating a first rotary electric machine and a second rotary electric machine that are arranged to include respective rotational axes parallel to each other and to be radially adjacent to each other; and a power control device controlling electric power supplied to the first rotary electric machine and the second rotary electric machine, wherein: the case includes a peripheral wall portion surrounding the first rotary electric machine and the second rotary electric machine; the power control device is mounted in a mounting section provided on an outer peripheral surface of the peripheral wall portion; a lower part of the power control device is located within a space surrounded by a line connecting a first cross point and a second cross point, the first rotary electric machine, and the second rotary electric machine, the first cross point being a cross point of a center line of the second rotary electric machine in a perpendicular direction with the case located on a side where the mounting section in which the power control device is mounted is located, the second cross point being a cross point of a tangent of the first rotary electric machine intersecting a center line of the first rotary electric machine in a horizontal direction with the case located on the side where the mounting section is located; and the vehicle drive system further comprising a terminal block that holds a second connection terminal electrically connected to a first connection terminal included in the power control device, and the terminal block is disposed at a side of the lower part of the power control device. ### Claim 2 (depends on 1) The vehicle drive system according to claim 1, further comprising: an input member drivingly coupled to an internal combustion engine; and a power distribution device distributing driving power of the input member to the first rotary electric machine, wherein the second rotary electric machine is disposed obliquely above the first rotary electric machine, and at least a part of the space is located in a recessed space formed between an outer peripheral surface of the first rotary electric machine and an outer peripheral surface of the second rotary electric machine. ### Claim 3 (depends on 1) The vehicle drive system according to claim 1, wherein the power control device is mounted in a state of being inclined from the horizontal direction in the mounting section. ### Claim 4 (depends on 1) The vehicle drive system according to claim 1, wherein the power control device includes a control board, a power card and a cooler, a reactor and a capacitor, and a water jacket that are sequentially arranged from a top in a height direction. ### Claim 5 (depends on 4) The vehicle drive system according to claim 4, wherein the power control device includes a direct current-direct current converter disposed below the water jacket. ### Claim 6 (depends on 1) The vehicle drive system according to claim 1, wherein when the power control device is not provided with a direct current-direct current converter: a control board, a power card and a cooler, and a capacitor are disposed sequentially from a top in a height direction; and a reactor is disposed in a longitudinal direction of a power stack including the power card and the cooler in such a manner that the reactor is in contact with the cooler.