The Mirai signals the start of a new age of vehicles. Using hydrogen – an important future energy source – to generate electricity, the Mirai achieves superior environmental performance with the convenience and driving pleasure expected of any car.
The new Toyota FC Stack achieves a maximum output of 114 kW (155 DIN hp) and a world-leading power output density of 3.1 kW/L (2.2 times higher than that of the previous Toyota FCHV-adv limited-lease model).
A new compact, high-efficiency, high-capacity converter has been developed to boost power generated in the Toyota FC Stack to 650 volts. Increasing the voltage has made it possible to reduce the size of the electric motor and the number of Toyota FC Stack fuel cells, leading to a smaller, higher-performance Toyota Fuel Cell System, thereby reducing system costs.
Tanks with a three-layer structure made of carbon fiber-reinforced plastic and other materials are used to store hydrogen at a very high pressure of 70 MPa (70 megapascals, or approximately 700 bar). Compared to the high pressure hydrogen tanks used in the Toyota FCHV-adv model, tank storage has been increased by approximately 20 percent.
The full under-floor cover and aerodynamically designed clearance lights reduce wind resistance and contribute to improved fuel efficiency and handling stability. Aero fins employed at the side of the rear combination lamps also improve straight-driving stability.
Outstanding quietness is achieved by electric motor drive at all speeds and reduced wind noise, plus full sealing of all body parts, and the use of sound-absorbing and sound-blocking materials optimally arranged around the cabin, including the use of noise-reducing glass for the windshield and all door windows.
The brake support mode makes efficient use of regenerative braking and improves braking performance when the driver wishes to greatly reduce vehicle speed such as when negotiating long downhill sections of road.
| FC stack | Name | Toyota FC Stack |
| Type | Polymer electrolyte fuel cell | |
| Volume power density | 3.1 kW/L | |
| Maximum output | 114 kW (155 DIN hp) | |
| Humidification system | Internal circulation (humidifier-less) | |
| Number of tanks | 2 | |
| High-pressure hydrogen tank | Nominal working pressure | 70 MPa (approx. 700 bar) |
| Tank storage density | 5.7 wt% | |
| Tank internal volume | 122.4 litres (front tank: 60.0 litres; rear tank: 62.4 litres) | |
| Type | AC synchronous electric generator | |
| Motor | Maximum output | 113 kW (154 DIN hp) |
| Maximum torque | 335 Nm | |
| Battery | Type | Nickel-metal hydride |
| Length | 4,890 mm | |
| Width | 1,815 mm | |
| Height | 1,535 mm | |
| Wheel-base | 2,780 mm | |
| Dimensions, weight and roominess |
Track (front/rear) | 1,535/1,545 mm |
| Minimum ground clearance | 130 mm | |
| Interior length | 2,040 mm | |
| Interior width | 1,465 mm | |
| Interior height | 1,185 mm | |
| Curb weight | 1,850 kg | |
| Seating | 4 |
