• Sep 4, 2013
Given the vehicle's importance as a halo car for Toyota, news of the next-gen Prius getting a potential 55 miles per gallon was our first headline from the recent Toyota Hybrid World Tour media event, but there is some news to report on the Prius Plug In as well. Namely, that the "plug" part of its name might be kind of superfluous as the car gets a wireless charger.

"We are developing a new wireless/inductive charging system to recharge the battery without the fuss of a cable."

A cord-free Prius is not coming anytime soon – system verification is not scheduled until next year – but if there's anything we learned at the Hybrid World Tour, it's that Toyota believes in the long term success of hybrid technology. Satoshi Ogiso, managing officer for the Toyota Motor Corporation and one of the engineers on the original Prius, said that wireless charging is just one new thing coming to a future Prius Plug-In. "We have been listening very carefully to Prius PHV owners over the past two years, and are considering their requests for additional all-electric range," he said. "We have also heard from these owners, that they would like a more convenient charging operation. In response, we are developing a new wireless/inductive charging system that produces resonance between an on-floor coil and an onboard coil to recharge the battery without the fuss of a cable." You can read all of his comments below.

Toyota is not the only automaker working on wireless charging. Infiniti wants it and Volvo is testing in-road chargers, for example. You can even go cordless today if you want to go with an aftermarket system from the likes of Bosch.
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Satoshi Ogiso, Managing Officer – Toyota Motor Corporation

Good afternoon everyone. And thank you for joining us here today.

As Mr. Uchiyamada said in his welcoming remarks last night, this is the first time Toyota has gathered its current, full global fleet of hybrid vehicles. So it is also the first time that I have seen them assembled together as well. You can imagine how I feel... at such a family reunion. Very special.

As I am sure everyone understands, this event is focused on our entire lineup of hybrids. It is my job to give you a taste of what we have in store in our hybrid future. However, it's impossible not to begin with how it all began.

I was one of the lucky engineers to be assigned to the G21 program in October 1993. I had been working for Toyota for 10 years, and I was assigned to the product-planning department.

G21 stood for "Global 21st Century. Ironically, its goal was not to develop a hybrid vehicle. Instead, its goal was to develop an affordable five-passenger family car, that would address the fuel efficiency and environmental needs of the 21st century.

Our focus was not on the next generation. It was to be much further into the future.

Initially, the idea was to develop a car that delivered a 50% improvement in fuel economy... of a typical Toyota compact sedan powered by a 1.5-liter engine before the beginning of the 21st century.

At the time, a separate powertrain group was showing considerable progress on a gas-electric hybrid system that eventually became the key to achieving our cost and performance targets.

As the benefits of going hybrid became clearer, there was an important change in strategy. Instead of doing what we could, we would try to do what we should. A new goal was set.

Again, based on a typical compact sedan and 1.5-liter engine, we would double fuel efficiency, cut emissions in half and reduce development time by two years. To achieve these goals, many diverse elements would come into play, including things like aerodynamics, rolling resistance and lightweight.

Does anyone know what these numbers represent?

At the time, we identified 80 different hybrid configurations that could be considered. We narrowed it down to the top-20, then ran them through simulations seeking "overwhelming fuel-efficiency...." and found four prime candidates.

At this point we could assess degree of difficulty and cost.

The clear winner was a series-parallel hybrid design with fairly simple hardware of two motors and a planetary gear set... but highly complicated software.

Despite the complexity and up-front investment in the software, increased volume would not mean increased cost. This would be the most viable system with an eye to the future.

During G21 development of a single car... the Prius... it became clear that the series-parallel technology was adaptable to a broad range of vehicles.

In fact, there was no reason to think that every one of our passenger cars could, one day, offer a hybrid powertrain.

Most importantly, it seemed to be a system that held great potential... for constant improvement, for many years to come. Uchiyamada-san would be right. If this was a bridge technology it looked like a very long bridge.

About the time we launched Prius in the U.S., we set in motion just such a long-range hybrid development plan. Here in the U.S., we began with the simultaneous development of hybrid versions of the Toyota Highlander... and Lexus RX. In Japan, we added the Estima and Alphard.

Prius, which means "go before," would be the first of many diverse takes on the basic hybrid concept.

Since the launch of Prius in 1997, we now have 23 Lexus and Toyota hybrid models in various global markets, including Prius Plug-in.

When the next generation Prius arrives, it will begin a new era for a broad range of Toyota and Lexus vehicles by marking the arrival of a substantially improved family of hybrid powertrains.

Think of it as, G21... point five.

These new hybrid powertrains will deliver significantly improved fuel economy in a more compact package that is lighter in weight and lower in cost.

The performance of this new generation of powertrains will reflect significant advances, in battery, electric motor and gas engine technologies...

And is part of Toyota's larger portfolio strategy towards the electrification of the automobile including plug-in hybrid, battery electric and fuel cell technologies.

Toyota has a deep commitment to vehicle electrification and therefore, to advancing drive-battery technology. Our next generation of hybrids will feature improved batteries with higher energy density; that is... the relationship between the battery's output and dimensions.

We have stepped up our research, development and production capacity... on both nickel-metal hydride and lithium-ion.

And looking to the future, we have ramped up development on new battery technologies like solid state... and lithium air, as well as devoting resources to new chemistries beyond lithium, such as magnesium and other low valence materials.

The next-generation Prius, specifically, will combine our advanced battery technologies with new electric motors that are smaller in size, and feature improved power density.

For example, the current Prius motor provides 4 times the power density of the first. The next Prius power density will be even higher.

Sometimes lost in the discussion of hybrids is the importance of the gasoline engine and its thermal efficiency. For example, the current generation Prius gasoline-engine has a thermal efficiency of 38.5%.

The new engine in the next Prius will be more than 40 %. A world's best.

So where do these advancements take us?

The current Prius has been America's fuel economy king for many years.

In its three generations, Prius MPG has improved on average... by about 10%, each generation. The challenge to continue to improve at this rate... to beat your own record... becomes very difficult, but makes it all the more motivating. I can tell you... that we are very motivated to beat our record.

To complement these substantial gains in powertrain development the next Prius will ride on a vastly improved chassis.

My background is chassis engineering. In fact, I chose to come work for Toyota when I was much younger because of the Corolla GT AE86.

The next Prius will feature the Toyota New Global Architecture or TNGA. It will have a lower center of gravity and increased structural rigidity. This, along with many other improvements will allow for beneficial gains in ride-and-handlng... agility and aerodynamics.

Its interior will be roomier with significant refinements in design, layout and ease of operation. And...it will introduce key advanced safety technologies.

Developed in parallel with the next Prius will be the next-generation Prius plug-in.

We have been listening very carefully to Prius PHV owners over the past two years... and are considering their requests for additional all-electric range.

We have also heard from these owners, that they would like a more convenient charging operation. In response, we are developing a new wireless/inductive charging system that produces resonance between an on-floor coil and an onboard coil to recharge the battery without the fuss of a cable.


We will begin verification of the system in Japan, the US and Europe in 2014.

About as long as we have been selling Prius, we have been developing another form of hybrid technology of critical importance to future mobility. Delivering zero emissions, along with driving range and refueling time on par with conventional vehicles, hydrogen will be in our future for a long time.

Toyota's first commercially available hydrogen fuel cell vehicle will go on sale in global markets in 2015.

At the 2011 Tokyo Motor Show, we unveiled the FCVR fuel cell concept. This year at the Tokyo Motor show, we will get a bit more specific, when we unveil a well-defined mid-size four-door sedan concept.

That vehicle will make its North American debut at the 2014 Consumer Electronics Show in Las Vegas in January... where Bob Carter will discuss the role of our US-based engineering team in its development... as well as a few of our preliminary plans for introduction into the US market.

For now, I can tell you that the hydrogen fuel cell stack is currently developing 3kw per liter of power density.

We believe that's a "world's best"... and about twice that of the fuel stack... we have been using for the Highlander fuel cell hybrid vehicle that many of you have driven. If you have not, please take the opportunity during our ride-and-drive segments.

Finally, I would like to address how hybrid technology is influencing motorsports... and how motorsports will help us develop better hybrid technologies in the future.

In 2007, with our passenger-car HSD serving as a starting point, we began work on high performance technologies and components needed to develop a hybrid drivetrain for elite competition: specifically, the TS-030 World Endurance Championship Le Mans prototype.

The challenge of the hybrid race car has been the added weight of the battery and electric motor. The TS-030 uses super capacitors instead of batteries, which show great promise for their ability to recover, store and release energy...
very quickly.

This potent hybrid powertrain integrates a unique inverter, with a 300-HP electric motor/generator sandwiched between the 6 speed-transmission and the 530-HP
V8 engine.

The extreme nature of racing, tests the durability and reliability limits of vehicle components, systems and software helping make TS-030 the world's fastest and possibly the most effective rolling hybrid laboratory program.

Bob Carter mentioned earlier today... that to take full effect, hybrid technology must be consumed in high volume. Regulatory push cannot, on its own, induce consumer pull.

To truly have an effect, our industry must develop a diverse array of products that consumers are willing to buy.

Where the cost premium is low convenience is high... and the benefits to the environment... and the pocketbook... are clear. Which is precisely where we believed hybrids would be, 15 years ago.

Today, patience and a long vision are still the cost of admission. Because consumer adoption of less convenient and higher cost technologies have been slow... and will continue so.

But fifteen years from now, I believe that plug-in hybrids, battery electrics, and especially hydrogen fuel cells could be as common as hybrids are today.

Perhaps members on my staff, working on fuel cells will be able to say they were in-on-it from the beginning the way I have been with hybrids.

I believe that will happen.

Thank you all for joining us today.


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    • 1 Second Ago
  • 40 Comments
      Ryan
      • 1 Year Ago
      If money is no object, then wireless recharging and the costs that come with that are worth it. But, for most people, I doubt that plugging in the car would be too much work.
      BipDBo
      • 1 Year Ago
      I hope it still has a plug in addition to the wireless chargers. There's a lot of charging station that would be unusable otherwise. Perhaps the wireless charger could be an option. I'd rather have one or more of the following: * larger battery * lighter weight * lower cost * more interior volume Many people are still worried about the possible health effects of constant exposure to cell phones and wireless routers, etc. Wireless EV chargers are new, but more importantly, much more powerful, bound to stir up controversy not just with the purchasers, but possibly even the next door neighbors. How are they different from cell phones? How will Toyota make the case that they are different, and safe?
        SteveG
        • 1 Year Ago
        @BipDBo
        Why would they need to be different? How will you make the case it is dangerous? Nonionizing radiation is nonionizing. Very simple. We can't expect toyota to fix stupid people as well as build cars.
          nbsr
          • 1 Year Ago
          @SteveG
          It emits two orders of magnitude more power and you are expected to use it regularly and for an extended period of time. I wouldn't be worried about cancer (it uses fairly low frequency radiation, not X-rays) but if you were planning to have children I would rather use a plug. Frankly speaking, no one knows how this will work out in practice. It is a new area of medical research, EM compatibility and regulations. So far people working with such fields were all professionals and they knew how to avoid side effects (which is one reason why we don't know them all that well). All the announcements are also extremely vague. From my own experience with wireless power transmission (albeit at much lower power) you could fairly easily achieve good efficiency and power of >1kW (and make it safe!) if you could put coils close together (
          BipDBo
          • 1 Year Ago
          @SteveG
          Skin cancer is caused by UV radiation. We know that. People who work on radio towers know that the system needs to be shut down or decreased to very low power before you go up there because the radio waves can kill you in close proximity. Microwaves use non-ionizing radiation to heat food, but it's not a good idea to use one to dry your cat. All of these are sources of non-ionizing electromagnetic waves. The only difference is frequency. The human body can take electromagnetic waves. That's why we can step out into the sunlight without dying. It's a matter of dosage. A little bit is healthy because we need vitamin D, but too much can slowly kill us, so we wear sunscreen. Even visible light can be quickly destructive in high dosage, such would be the case in a concentrated laser. The total dosage that a person would absorb we be dependent on three factors; power, proximity and time. A wireless charger would be the worse of all three; it would emit a powerful wave, right in your home (or your neighbor's home) for a large portion of the time that you are home. How can we be sure that there are no long term effects of adding this high dose of electromagnetic radiation to all of the other sources that we are exposed to?
        Nicholas (Kompulsa)
        • 1 Year Ago
        @BipDBo
        Research needs to be done on this. One benefit of this concept is that, unlike cellphones, the radiation does not have to be spread out into the air. It only needs to be transmitted from the ground to the car, and if necessary, in the future, the chargers could be elevated when the car is parked up into a little radiation shielded compartment under the car for charging, so that no one is exposed to any of its radiation. In other words, EV chargers have the potential to be shielded.
      GR
      • 1 Year Ago
      Does Toyota have any plans to come out with a pure EV Prius? It seems like that would be a natural progression for them, given the popularity of the Prius/Prius Plug-in.
      Anderlan
      • 1 Year Ago
      What are the efficiency losses of wireless charging versus a cable? If your cat decides he likes the EM or the warmth of the spot between the pad and the car will he interfere with the charging or start walking funny?
        MTN RANGER
        • 1 Year Ago
        @Anderlan
        There is usually only a couple of inches of clearance to the transmitter; if the cat can fit between them, good luck. Current wireless systems are in the 90+% efficiency range (Evatran Plugless Power, Qualcomm, Witricity, etc).
        CoolWaters
        • 1 Year Ago
        @Anderlan
        It would be better for a floor disk to rise up and almost touch the car, to reduce losses.
        Letstakeawalk
        • 1 Year Ago
        @Anderlan
        Not nearly as dangerous as a dog that likes to chew on cords. I've known a few of those...
          BipDBo
          • 1 Year Ago
          @Letstakeawalk
          Darwin awards also applies to dogs (and dog owners).
      BipDBo
      • 1 Year Ago
      "The "conservative", who isn't just conservative for racial reasons..." What the heck is this about? The republican party fought the democratic party to end slavery. It's the same party that survives today. The democratic party is the one that changed. Simply in order to buy votes, the democratic party changed strategy, buy loudly attacking "inequality" while at the sacrifice of liberty, to take and redistribute income to lower classes. This welfare state created a culture of dependence which became the ultimate oppressive force. Yes, there are racists conservatives in the world, but there are also many, racist & arrogant liberals. The popular idea that conservatism is racist is a smokescreen design to derail proper discourse. It is a cowardly, bold faced lie.
      EZEE
      • 1 Year Ago
      Fewer divorces...
      Koenigsegg
      • 1 Year Ago
      "fuss of a cable" LOL
        Neil Blanchard
        • 1 Year Ago
        @Koenigsegg
        It sounds like *somebody* is trying to rationalize their resistance to taking full advantage of electric drivetrains? They say they want to improve the *peak* efficiency of gasoline engines up to ~45% - but they are resisting *fully* using an electric motor that averages about 2X that efficiency...
      RyanC
      • 1 Year Ago
      Last I checked it took me 10 seconds to plug in my parent's Model S after taking it for a spin. This morning I filled up at a gas station which took me about 10 minutes total. I do that once per week. It would take a whole lot of 10 seconds plugging in to equal 10 minutes. Don't even get me started on oil changes. So yeah, plugging in is a pain, and I'd much rather have the huge losses from using wireless charging. I'm sure this came from a very well-meaning well-thought out study though, with a great sampling of people, who obviously had no business taking it, as they didn't even think about the choices given to them or what they actually meant to them in reality.
      BipDBo
      • 1 Year Ago
      Why not just have a real electrical contact rise up and touch the car instead and have a fully automatic, 100% wired charging instead of wireless? A long time ago, there was a story of such an invention. It was a first gen prototype, so it was a little bit crude, but it worked and had plenty of room for refinement.
      Spiffster
      • 1 Year Ago
      Wow, people are getting lazy these days... how hard is it to plug your car in? In that same light, how hard is it to check your blind spot or just pay f-ing attention when you're driving? Pretty damn hard for most people...
      Ricardo Gozinya
      • 1 Year Ago
      So Japan, not content with sticking with a different standard for plug ins than the rest of the world, now wants to build up an utterly unnecessary and likely extremely expensive infrastructure.
      Spec
      • 1 Year Ago
      I'd much rather have a larger battery.
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