Toyota Mirai review and test drive of the fuel cell electric vehicle

22nd Feb 2020 seven:00 am

Gas cell electric cars have long been on the periphery of the electrification motion. We get a position examine with the sci-fi Toyota Mirai.

The Toyota Mirai you see below is arguably the most technologically highly developed auto in India at the second. It’s a hydrogen gas cell electric vehicle (FCEV) which is in India as aspect of Toyota’s showcase of the opportunities of electrification. Gas cell cars have been a work in-progress for long but Toyota – which is been developing the know-how because the early 1990s – has made some very seriously substantial strides in this region. So though other carmaker’s experimental FCEVs under no circumstances really made the changeover from motor-clearly show ground to showroom ground, Toyota’s Mirai is a person among a handful of gas cell cars offered for sale to the general auto-acquiring public, if nonetheless only in find marketplaces.

You can imagine of a gas cell vehicle as a chemistry lab on wheels. In the most standard terms, a hydrogen gas cell vehicle is an electric auto, with energy getting produced by a collection of chemical reactions among hydrogen and oxygen, somewhat than saved on board in a battery that is topped up by way of a plug. You could liken the gas cell stack where by the reactions choose spot to a little energy generation station. The greatest little bit? Water, claimed to be clean more than enough to drink, is the only by-merchandise of the on-board energy generation course of action. There are no CO2, no SO2 and no NOx emissions. In terms of rolling emissions, at least, the Mirai is as clean as they appear.


Save for the 154hp electric motor from the Camry Hybrid underneath the bonnet, the other parts of the Mirai’s procedure are concealed from check out. The gas cell stack, comprising 370 cells, sits tucked underneath the front seats though the pair of carbonfibre hydrogen gasoline tanks (a person for storage and a person for enlargement) are positioned underneath the rear seat and in the boot. The tanks are rated for 700bar but Toyota suggests they can endure twice that, providing a substantial basic safety margin. Hydrogen storage capability is 5kg and it usually takes all of 3min for a tank-up. And here’s where by it will get definitely appealing. The Mirai has a cruising variety of 550km variety in the European NEDC cycle.  Even outside the house excellent take a look at conditions, a theoretical variety of around 450km with a 3min fill is doable. To place issues in point of view, even the quickest-charging battery electric cars have to have a very good 30min to get that type of variety. The powertrain also features a nickel-metal hydride battery, substantially like what you’d uncover in regular combustion engine-based Toyota hybrids. The work description is also the same. The battery stores energy recovered from deceleration and health supplements the gas cell (somewhat than an engine) underneath tricky acceleration. Toyota classifies the Mirai as a hybrid – and now you know why. In any case, which is a ton of specifics. What is the Mirai like in apply?

The term that comes to thoughts is ‘normal’. It feels like any other battery electric vehicle. There are a number of clicks from the gas cell that split the calm on ‘ignition’ but definitely the ‘Ready’ symbol on the centrally-mounted screen is my only genuine indicator that it’s all methods go. The Mirai creeps forward in silence and, again, there is nothing to suggest I’m sitting down in just about anything out of the common. Like any other electric auto, the Mirai feels it’s peppiest at lower speeds with the strong preliminary responses helping the Toyota article a respectable 9.9sec -100kph time. On the other hand, likely complete throttle has the motor whirr and whine, and by 120kph or so I can sense the energy tail off. The 750m straights at ICAT Manesar’s take a look at observe are not long more than enough to validate the claimed 178kph best velocity.

Screen exhibits energy generation and recuperation.

Slowing down is a non-occasion. Sure, the brakes are not the most feelsome at the best of pedal travel but which is just something we have appear to be expecting on cars with regenerative braking. ‘Br’, selectable by the flimsy equipment lever, raises the stage of regen braking and, in change, can help the battery recuperate demand faster. The readout that illustrates this energy recuperation and the resource of motive energy in genuine time helps make for interesting viewing. An unusual celebration trick is the alternative to discharge the freshly created water from the underbody at the contact of an ‘H2O’ button. For deficiency of a greater parallel, it’s the automotive equal of a auto relieving alone!

For all its tech, the Mirai is not mild at one.8 tonnes. Nonetheless, from powering the wheel, it feels easygoing, and the trip is also pliant more than enough for what is a heavy sedan with a reasonably standard torsion-beam set up at the rear.

This is not a complete-blown overview but I have to convey to you, Toyota has carried out well with the resources inside of the Mirai’s cabin. Front-seat comfort is also very good but you have to live with some compromises at the back again. The underfloor place of the gas cell usually means you simply cannot tuck your feet underneath the front seats, though the concealed centre part for the superior-voltage wiring usually means there is seating only for two. And with the secondary hydrogen tank occupying primary genuine estate aft the rear seats, you have to make do with a 361-litre boot. Also, I just simply cannot provide myself to like the Mirai’s rad design, although I do give it a next appear when advised the silhouette resembles the flowing form of a droplet of water.

“Who still left the tap on?” You can purge saved water at the contact of a button.

But let’s zoom out a little bit and concentration on the broader concern of FCEV prospective. FCEVs like the Mirai have no destructive emissions, they can match the greatest of BEVs on variety and really do not choose substantially extended than a conventional petrol or diesel auto to tank up. And let’s not forget about a little element – Hydrogen is the most ample ingredient in the universe! With so substantially likely for them, FCEVs need to be the know-how in concentration in a environment marching to electrification, ideal?

It’s not so simple. For a person, gas cells are high priced to manufacture due to the superior expense of valuable metal (normally platinum) parts. Deriving hydrogen in a type that can be applied in cars delivers its own established of problems. Extracting hydrogen from oil and natural gasoline provides greenhouse emissions that negate any potential rewards, though developing hydrogen from water is energy-intensive and only ‘green’ if powered completely by renewable energy. Also, where’s the hydrogen filling infrastructure? India has a person hydrogen filling station at Indian Oil Corporation’s R&D centre at Faridabad. The following-closest filling station is a very good number of thousand kilometres away.

The prospective is there but gas cell cars can only witness mass adoption when carmakers, energy suppliers and governments can address the aforementioned challenges. ‘Mirai’ interprets from Japanese to English as ‘the future’ and, as issues stand, it’s a auto that belongs there.

HOW Gas Cell Cars Work

1st applied commercially by NASA in the sixties for powering on-board electronics on spacecrafts, gas cell know-how has made its way to automotive apps in new several years. Whilst an FCE V characteristics a motor, battery pack and energy handle unit like other xEVs, hydrogen tanks and a gas cell stack are special to this form of vehicle. The stack, which is a selection of gas cells, generates electric power making use of hydrogen and oxygen, with the only by-merchandise getting water.


Breaking it down further, a gas cell is a product consisting of a pair of electrodes – a adverse anode and a beneficial cathode – coated with a platinum catalyst. An electrolyte like a polymer membrane completes the electrochemical cell. Hydrogen gasoline provided from the tanks to the anode dissociates into protons and electrons due to the catalyst’s existence. Whilst the electrons move by an external circuit and produce existing, protons move by the electrolyte to the cathode, where by they combine with oxygen from the air to type water. Electrical power produced is provided to the motor to propel the vehicle. The battery pack not only acts as storage for energy recuperation by way of regenerative braking, but also helps the motor through superior-energy situations like acceleration.

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