A new EV driving experience – Nissan R&D expert’s special session

A new EV driving experience – Nissan R&D expert’s special session

Good morning, and welcome to Nissan My name is Carrie, and
I will be hosting today’s R&D session Today, we’re going to be talking about
some of the technologies found in this car the Nissan Ariya Concept Joining me here today is the general manager of Nissan’s Advance
Vehicle Engineering Department Toshiyuki Nakajima Please welcome him to the stage Hello Sir, thank you for joining us today Nissan has just announced
this Ariya Concept Can you just tell us
what the significance of that is considering Nissan’s global
leadership in the EV field? There’s a lot of discussion going on right now in the EV industry about range and power output But at Nissan we’re thinking about more than that As an EV pioneer we’re thinking about how we can
advance to a next generation of EVs That means a driving experience that delivers more confidence, excitement,
and comfort than ever before Today, I’d like to talk about two new technologies
implemented in the Ariya Concept: The first is e-4ORCE The second is our new
sound-insulating acoustic meta-material All right. Well, let’s start with e-4ORCE I believe the fundamental user
benefit is its uniquely smooth and powerful performance Right And with that powerful performance we can deliver three main user benefits: a more comfortable ride superior handling, and confidence
on any road surface The point is that e-4ORCE is a control system that lets us maximize
the performance of the hardware We created a prototype car with
these specific control technologies and held a media test drive event in Japan Yes. And this is the footage from that Looks like a lot of fun Can you explain how e-4ORCE achieves
that incredible level of control? The three motors are calibrated
at a rate of 10,000 times per second and it’s this precise control that
really unlocks the driving experience The journalists who
drove the test car said it showed the potential
of the electric all-wheel control and that it felt like the future of EV driving Yeah, that sounds incredible And Nissan has been working on this
technology for quite some time Can you tell us a little bit
about how it was developed? As you know Nissan has been developing and
defining electric drive control 4WD control and chassis control technologies Now, by integrating these control technologies we’ve been able to dramatically
improve the driving performance handling performance and ride comfort Yeah, it’s pretty amazing So will we be seeing
e-4ORCE in other Nissan EVs? Yes, absolutely We’ll see this e-4ORCE technology being built into not only battery EVs like the Ariya Concept but also another technology unique to Nissan: e-POWER e-POWER has the same
powertrain as a battery EV so, we can make this e-4ORCE technology and its benefits available to a wider audience That is our advantage I know yesterday we mentioned that e-4ORCE was built on the accumulation
on development know-how How do you see it evolving in the future? e-4ORCE will evolve to more effectively handle
a wider range of driving situations and conditions and this will personalize each driving experience As it continues to evolve though will we see our current vehicles
gradually becoming out of date? No e-4ORCE and other software that
controls all aspects of the vehicle is automatically updated
through a technology called FOTA – firmware over the air Over time, the functionality of the vehicle will evolve to further personalize the driving experience So through that firmware over the air we will be able to update it similarly
to how we update our smartphone? Awesome, good to know Next, I would like to turn our attention to another area of Nissan research and that is sound insulation for interior cabins What sound do you typically hear
when you’re driving in a conventional car? Some engine noise and some road noise Let’s take a listen to that What you’re going to be hearing is road noise which has a characteristically wide
frequency band of 500-1200 hertz And that is caused by the friction of the tires of course, on the road And as it turns out it’s extremely hard to insulate
the cabin from that type of noise We’re going to bring in a
professional to join us today senior manager of
Nissan’s Processing Laboratory Please welcome Susumu Miura Thank you for joining us So glad to have you here today So what makes it so difficult to insulate the interior
cabin from the road noise? Even with today’s advanced technology there’s basically only one way to insulate against low frequency and
wide-band acoustic noise That’s by using heavyweight material Right, but the problem with that is that
using heavyweight material is, of course, going to add to the
overall weight of the vehicle Which is not good for an EV,
because if you add to the overall weight you’re going to reduce the range, right? That’s right. Absolutely The range of the vehicle is
reduced with using heavy material but the driving performance is also affected So we had to be careful with how much this heavyweigh
material was used and where it was mounted But today, Nissan is introducing a new material which will solve the road noise issue It’s called acoustic meta-material This acoustic meta-material I hear, is 75% lighter than
the materials like heavy rubber that are currently being used in our cars That’s right We went back to the first principle and
engineered a new material that was lightweight yet had excellent sound insulation properties But the construction of it is fairly simple It’s a film with a repeating lattice-type structure Can you explain a little bit more about
how that manages to dampen the sound? Sure The structure is simple but unique The lattice pattern is
covered with a thin plastic film Acoustic noise is a kind of air vibration When acoustic noise hits the material the material “bounces” it back
according to the air vibrations This reduces the noise
passing through the material This technology is a world-first
for automotive applications What made it possible to engineer
such a remarkable material? As one of the first EV manufacturers Nissan already has a decade of
customer feedback regarding EVs Many customers feel
that the road noise is loud compared with the quiet EV motor and inverter So Nissan has recognized the importance
of sound insulation in electric vehicles for a long time Various approaches have
been taken to solve the issue But there has always been the relationship between material weight and
sound insulation properties Lightweight materials are
not good sound insulators It’s common physics The inspiration for this new
material came from our research into controlling electromagnetic waves It’s like antenna technology It’s the analogy between electromagnetic waves and elastic acoustic waves The breakthrough was
achieving a lightweight material but with this excellent
sound insulation property Furthermore, this material is not active but controls sound waves passively It’s a technology of Nissan Intelligent Mobility All right seeing is believing But in this case, it’s “hearing is believing”… True, so we are going to do
a demonstration for you We’re bringing out a table here with a steel box that is going
to simulate road noise for you So what we have here in this box is just a little speaker hooked up to a
phone that is going to play the noise for us and of course a microphone so that you can all hear
what this noise sounds like OK First, how much sound isolation
do we get from lightweight cotton? This is very lightweight Turn on the sound Alright, here’s your road noise Can you all hear that? Everybody got it? This sound has a low frequency
and a wide band of 300-1000 hertz like the road noise in a vehicle All right, let’s see how
this lightweight cotton does No sound restriction Not very good You can still hear that road noise even with several layers
of the cotton on there Next up we have some current sound insulation
material made from rubber and fabric You can find it under
the floor carpet of cars today This is pretty heavy I think we determined this
was a little over half a pound for you Americans – about 300 grams That’s right. The heavier the material the better the sound insulation If you put this over the sound source you can hear the sound insulation effect Alright, let’s give it a try There’s your road noise It does a good job It does But it’s heavy But it’s heavy So finally let’s see how Nissan’s new
acoustic meta-material does This feels like a piece of paper I wish I could pass this around to all of you Extremely lightweight This one, we determined,
is about an ounce, so it’s like 35 grams Let’s see how it works Let’s see…I’ve got this oriented right… Go for it That’s incredible It’s not magic It’s so much lighter, and it still
does at least as good a job Wow! For anyone interested in learning more
about this technology and how it works please join us in the technology
demonstration area over there Thank you, Miura-san! Thank you for joining us Let’s give him a round of applause He is excited about this and
he does a great job demonstrating it Thank you, Miura-san So, this acoustic meta-material
makes possible a really quiet cabin And together with e-4ORCE it transforms the EV driving experience It will, and we look
forward to that in the future Thank you, Nakajima-san, for joining us A round of applause for him as well We sure appreciate their insight
into these technologies of the future Thank you, guys, for
spending time with us today

Comments (6)

  1. Nissan control for battery warming or cooling?

  2. Nobody:

    Nissan video uploaded at 4 am: *exist*

    Me: just more 5 minutes

  3. Think it will be a while for all Ev's to get great battery tech

  4. That guys' English is killing me, in a good way.

  5. This company screwed Carlos, good luck making any profit 👎

  6. Please bring back a refreshed 370z

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