2022 Toyota Mirai interior & exterior - a future sustainable hydrogen society | Mini Auto

Starting price: $49,500

Toyota's vision for a sustainable hydrogen society of the future recognizes the value of hydrogen as an abundant and viable resource for energy transport and storage. It has the potential to provide zero-carbon mobility, not only in road vehicles but also in trains, ships and planes, and to power industry and businesses. and family. It is also an efficient means of storing renewable energy and can be transported where it is needed.

Toyota began developing hydrogen fuel cell electric vehicles in 1992, successfully introduced the Mirai sedan to the world market in 2014. This groundbreaking achievement builds on the world-leading experience of Toyota. company in hybrid technology, the core technology for various electric vehicles. vehicle's powertrain.

The concept of hybrid energy has been successfully adapted for the production of Hybrid Electric (HEV), Hybrid Electric Vehicle (PHEV), Battery Electric (BEV) and - starting with Mirai - Fuel Cell Electric Vehicle (FCEV) ). Each has qualities suitable for different mobility requirements: for example, BEVs for shorter routes and urban driving; HEV and PHEV for general personal mobility and longer distances; and FCEV for larger and heavier passenger cars, heavy trucks and public transport.

Now, a new generation of Mirai is on the way, a vehicle that takes FCEV technology to the next level and offers customers more emotion in terms of dynamic, modern styling and better driving performance . The completely redesigned fuel cell system, smart packaging and aerodynamic efficiency extend the driving range to around 650 km, with no emissions other than pure water.

Performance and design improvements

When developing the new Mirai, Toyota committed to bringing comprehensive innovations to increase customer appeal, from performance to appearance and driving.

Its priority is to improve driving range over the first generation and to go beyond the distances typically reached by battery electric vehicles. Increased power and hydrogen fuel economy, improved performance and better aerodynamics all contribute to a 30% increase in driving range to approximately 650 km. This gives the new Toyota Mirai a genuine long-distance driving ability.

Packaging has also been significantly improved with the new Mirai built on Toyota's modular GA-L platform. The more efficient and balanced arrangement of the new FCEV powertrain - especially with the fuel cell stack moved from below the cabin to the front compartment - has allowed for a more spacious five-seat interior with Improved legroom for rear seat passengers.

The new Toyota Mirai also has more attractive vehicle proportions: the overall height has been reduced by 65 mm to 1,470 mm and the wheelbase has increased by 140 mm (2,920 mm). With the rear overhang extended by 85 mm, the car's overall length is now 4,975 mm. The track width is increased by 75 mm and the use of larger, 19- and 20-inch wheels adds to the lower and more dynamic appearance as well as the intuitive feel of the lower center of gravity of the new Mirai.

Engage customers with more emotions

One of the main goals of the new Toyota Mirai is to give the car a stronger emotional appeal, making it a car that people will be attracted to by its looks and driving style, as well as its performance. its ecological efficiency. The new GA-L platform and Toyota's advancements in FCEV technology have made this a reality.

GA-LOL Platform

Adoption of the GA-L platform has enabled the repackaging of the fuel cell stack and powertrain components in a way that makes space more efficient. The result is a more spacious five-seat cabin and better chassis balance. Perhaps most significantly, it allows the installation of three high-pressure hydrogen tanks, increasing the vehicle's fuel capacity and range - by 30%.

The tanks are arranged in a "T" configuration, the longest running vertically and centered below the floor, with two smaller tanks located below the rear seats and luggage compartment. Together, they can hold 5.6 kg of hydrogen, compared to 4.6 kg in the current Mirai's two tanks. Their position contributes to a lower center of gravity of the vehicle and avoids affecting load space.

The new architecture also allows the all-new hydrogen fuel cell to be moved from its current location below the floor to the front compartment (equivalent to the engine compartment), while the high-voltage battery (more compact) and The electric motor is located on the rear axle. As explained below, the powertrain layout has been optimized to give the new Mirai a 50:50 front:rear weight distribution.

The tanks are multi-layered, sturdier and highly weight efficient - hydrogen makes up 6% of the combined weight of the fuel and the tank.

New fuel cell stack

Toyota's new fuel cell stack and fuel cell power converter (FCPC) have been developed specifically for use with the GA-L platform. The designers were able to tie all the elements together in the stack frame (including water pump, continuous cooler, air conditioner and compressor and hydrogen circulation pump) with each part is made smaller and lighter, while improving performance. The stack housing itself has been made smaller using Friction Stir Welding, reducing the distance between the fuel cell and the housing.

The fuel cell stack uses a solid polymer, like on the current Mirai, but has been made smaller and has fewer cells (330 instead of 370). However, it sets a new record for specific power density at 5.4 kW/l (excluding end plate). The maximum power was therefore increased from 114 kW to 128 kW. Cold weather performance has been improved with the ability to start at temperatures as low as -30.

By consolidating system connections in the case, fewer components are needed, saving space and weight.

The focus on innovation and improvement in every component resulted in a 50% reduction in weight but a 12% increase in strength. New measures include relocating the manifold, reducing the size and weight of the cell to optimize the shape of the air channel separator, and the use of innovative materials in the electrodes.

The unit also incorporates a Fuel Cell DC-DC Converter (FDC) and modular high-voltage components, and achieves a 21% reduction in size compared to the current system. Weight has been cut by 2.9 kg to 25.5 kg. Advanced technology has contributed to space savings, with Toyota using next-generation silicon carbide semiconductor materials for the first time in intelligent power modeling (IPM) transistors. This allows for increased output and lower power consumption while using fewer transistors, thus allowing FCPC to be made smaller.

The same size and weight savings method has been applied to other parts of the FC stack. The air inlets are designed for low pressure drop and contain sound-absorbing material so that noise from the air intakes is not noticeable in the cabin. The exhaust pipe uses a plastic tube and is designed to allow the discharge of large amounts of air and water; a larger power silencer contributes to a quieter cabin. The complete air system is almost 30% smaller than the current Mirai and weighs a third (34.4%).

Lithium-ion battery

The new Toyota Mirai is equipped with a lithium-ion high-voltage battery that replaces the current model's nickel-metal hydride unit. Despite its smaller size, it is more energy efficient, for higher output and superior environmental performance. Containing 84 cells, it has a rated voltage of 310.8 vs 244.8 and a capacity of 4.0 Ah vs 6.5 Ah. Overall weight has been reduced from 46.9 to 44.6 kg. Power has been improved from 25.5 kW x 10 seconds to 31.5 kW x 10 seconds.

The smaller size of the battery has allowed it to be placed behind the rear seats, avoiding entry into the load compartment. An optimal air-cooling path has been designed, with discreet air intakes on either side of the rear seats.

Dynamic performance

The adoption of the GA-L platform for the new Toyota Mirai gives the vehicle the fundamental benefits of a lower center of gravity, improved inertia characteristics and significantly increased body stiffness, all of which help to outstanding dynamic performance.

With the fuel cell stack moved from beneath the floor to the front compartment and the battery and electric motor positioned at the rear, a 50:50 front:rear weight balance has been achieved, giving it the basic stability characteristics of car front-wheel drive engines.

Body rigidity has been increased by strategic bracing and reinforcement, wider application of body adhesives and the use of laser screw welding.

The new platform also features multi-link front and rear suspension, in place of a MacPherson strut front and torsion beam rear arrangement. This setup offers a high level of stability, controllability and driving comfort. Details include the use of thicker anti-roll bars, optimized top and bottom articulation positions, and overall high suspension stiffness, which rewards responsiveness and stability.

Other benefits come from the new Mirai's use of larger wheels and tires. The 19-inch and 20-inch wheels are fitted with 235/55 R19 and 245/45 R20 tires respectively, offering low rolling resistance and smooth handling, contributing to fuel economy, handling quality, stability and performance. Quiet cabin environment. Using larger diameter wheels and tires ensures the space needed for the three new hydrogen fuel tanks.

The car's improved aerodynamics, with its lower roofline, full visor and lower drag figure, play an important role in improving handling and stability, while also achieve longer flight range.

The new Toyota Mirai also offers the bonus of its improved driving personality. The additional power is generated by the new fuel cell stack, and the battery is harnessed for a smooth, linear takeoff, with acceleration that harmonizes with the rider's use of the throttle. Highway driving is comfortable and stress-free, with excellent responsiveness at all speeds. When driving on winding, open roads, the new Mirai's poise combines with good acceleration in the corners.

Clean the air when you drive

The environmental benefits of driving a Toyota Mirai go beyond zero emissions to "negative emissions" - the car effectively cleans the air as it moves.

A Toyota innovation, the catalytic converter is integrated in the air intake. When air is drawn into the vehicle to power the fuel cell, an electrical charge on the nonwoven filter captures microscopic pollution particles, including sulfur dioxide (SO2), nitrogen oxides (NOx) and PM particles. 2.5. The system is effective at removing 90 to 100% of particles with a diameter of 0 to 2.5 microns from the air as it enters the fuel cell system.

Target a 10x increase in sales

The introduction of the new Mirai will help Toyota target deeper market penetration with sales expanding 10 times. This growth will be supported by stronger performance of the new model and greater customer appeal, notably a more affordable vehicle with a selling price reduced by approximately 20%.

The practicality of owning hydrogen FCEV will also steadily increase as markets improve their hydrogen infrastructure, the number of filling stations increases, and Government and local governments introduce incentives. and new regulations for cleaner mobility.

2022 Toyota Mirai interior & exterior - a future sustainable hydrogen society | Mini Auto 2022 Toyota Mirai interior & exterior - a future sustainable hydrogen society | Mini Auto Reviewed by Dang Nhan on June 25, 2021 Rating: 5

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