New Mazda MZR 1.3L Miller -Cycle Engine

[mikeyb]

23km/l fuel economy for Mazda2


Mazda Motor Corporation has developed a new, naturally aspirated MZR 1.3L Miller-cycle engine, which will power the all-new Demio (known as the all-new Mazda2 in overseas markets) when it goes on sale in Japan in July 2007. In combination with Mazdas first continuously variable transmission (CVT), the engine will assist the new Demio to achieve a 10-15 mode fuel economy of 23.0 km/L, an improvement of approximately 20 percent over the 19.2 km/L rating of the current model.

Newly developed from the current MZR 1.3L DOHC aluminum engine, the naturally-aspirated MZR 1.3L Miller-cycle engine employs delayed closing of the intake valves in order to reduce pumping losses and improve thermal efficiency through a higher expansion ratio. Intake valve timing is optimized by the Sequential Valve Timing System to provide improved fuel efficiency over the current MZR 1.3L engine when cruising and accelerating. In conjunction with the CVT, which transfers torque at low speeds without power loss and eliminates gear-shift shock, the setup achieves excellent fuel efficiency as well as a smooth and exhilarating ride.

In addition to this new, highly efficient powertrain, the all-new Demio has been made approximately 100 kg lighter than its predecessor through weight reduction techniques, which have resulted in nimble handling and significantly improved fuel economy.

The Demio model with the naturally aspirated MZR 1.3L Miller-cycle engine combined with the CVT transmission achieves a fuel economy that is rated as 20 percent or better than the level specified by Japans 2010 fuel economy standards. Exhaust emissions are also at least 75 percent lower than 2005 standards, which conforms to Japans Super Ultra-Low Emissions Vehicle (SU-LEV) standard and qualifies the Demio for Green Tax exemptions.

Through its Sustainable Zoom-Zoom plan that was announced in March 2007, Mazda declared its intention to pursue the harmony felt between driving pleasure and environmental and safety features, and its quest for an advanced Zoom-Zoom world. This includes the ongoing desire to create captivating design, to provide our customers with continual driving pleasure and to develop improved safety and environmental technologies.

- WorldCarFans

 

[genericuser]

54.1 mpg.. Dang.. Just dang.

 

[Foolish]

I thought "Miller-cycle" engines had to be supercharged. Clearly, I got the definition wrong. I'll have to look that up later.

 

[B1GHAM]

http://en.wikipedia.org/wiki/Miller_cycle

its typical to have a supercharger combined on the miller cycle engine to compensate for some of the charge loss, but its not necessary.

this vehicle is going for efficiency and not power, so in this case a supercharger would be wasteful.

 

[TheMAN]

I'm going to have to guess the engine code is "ZJ-VEM"

 

[Lord_Zath]

http://en.wikipedia.org/wiki/Miller_cycle

its typical to have a supercharger combined on the miller cycle engine to compensate for some of the charge loss, but its not necessary.

this vehicle is going for efficiency and not power, so in this case a supercharger would be wasteful.

... which means it'll be everyone's 1st mod

 

[Donas64]

EAT YOUR HEART OUT TOYOTA PRIUS!!!!!

Finally a good looking little hatch that sips gas like expensive wine. And its got zoom zoom credentials!

MAZDA2 FTW!!!!!

 

[B1GHAM]

EAT YOUR HEART OUT TOYOTA PRIUS!!!!!

Finally a good looking little hatch that sips gas like expensive wine. And its got zoom zoom credentials!

MAZDA2 FTW!!!!!

AND - its not a hybrid. which means not only will you save energy and resources by not having tons of batteries made for the car, but youll save in the long run in service.

you know I read an article that said from production to 100k miles, that an H2 hummer was actually more efficient and cheaper to operate than a prius. Pretty interesting read if I can find it.

In either event I think Mazda is getting it right. Stop focusing on hybrid electric technology and focus on squeezing every last MPG out of current gasoline engines.

 

[Antoine]

Proof that Mazda is not only developing its "zoom-zoom" image but at the same time squeezing the maximum amount of efficiency from their current and future engine lineup...Mazda continues to have a great overall strategy...There is no reason why you can't have "all of the above" in a reasonably priced car...unless of course you don't want a Mazda

PS...That color is cool! (thumb)

 

[Donas64]

AND - its not a hybrid. which means not only will you save energy and resources by not having tons of batteries made for the car, but youll save in the long run in service.

you know I read an article that said from production to 100k miles, that an H2 hummer was actually more efficient and cheaper to operate than a prius. Pretty interesting read if I can find it.

In either event I think Mazda is getting it right. Stop focusing on hybrid electric technology and focus on squeezing every last MPG out of current gasoline engines.

I heard about that article and if was referenced in Car & Driver Magazine. The cost from production to the scrap yard plus the running costs and the average lifespan of usage and premium you pay for the current crop of hybrids don't really make them cost efficient in the long run. The idea behind them is excellent but it still needs the costs to come down.

But with this new motor has LOTS of potential without all the overhead cost, battery disposal costs, and drivetrain costs etc.

This car deserves to be a massive hit. I would definatly purchase one if it was what I was shopping for.

Did I mention thats its a GOOD LOOKING small car?

 

[Donas64]

Proof that Mazda is not only developing its "zoom-zoom" image but at the same time squeezing the maximum amount of efficiency from their current and future engine lineup...Mazda continues to have a great overall strategy...There is no reason why you can't have "all of the above" in a reasonably priced car...unless of course you don't want a Mazda

PS...That color is cool! (thumb)

Yeah that color is hot.

But very true about mazdas strategy. They have an excellent and varied lineup right now. Its a good time to be a mazda fan. Now if they hit the money on the new 6, its all systems go for them.

 

[B1GHAM]

I heard about that article and if was referenced in Car & Driver Magazine. The cost from production to the scrap yard plus the running costs and the average lifespan of usage and premium you pay for the current crop of hybrids don't really make them cost efficient in the long run. The idea behind them is excellent but it still needs the costs to come down.

But with this new motor has LOTS of potential without all the overhead cost, battery disposal costs, and drivetrain costs etc.

This car deserves to be a massive hit. I would definatly purchase one if it was what I was shopping for.

Did I mention thats its a GOOD LOOKING small car?

EXACTLY - also look @ the nickle processing plants in canada, it looks like a scene out of a sci-fi movie. the surrounding area is dead for about a good couple miles. All trees and life are nonexistant. All because of the fallout produced just to process the nickle into "battery" grade. After that, it still has a few more steps before its turned into a battery!

add that to the fact that disposal isnt really disposal, but dumping. I find it funny how we come up with ideas that promise to be more environmentally friendly without scanning the big picture. Who cares if its environmentally friendly now if it comes back to bite us in the ass 20 years down the road. All for naught.

 

[Kooldino]

Cool car. Could make a nice beater.

 

[Foolish]

Fixed:

There is no reason why you can't have "all of the above" in a reasonably priced car...unless of course you live in the United States

They're still not planning to bring the 2 to the states, are they?(monkey)

 

[B1GHAM]

Fixed:


They're still not planning to bring the 2 to the states, are they?(monkey)

due to the introduction of the versa, fit, echo, etc. they are highly considering it - but theres no plans set in stone.

 

[RODSCALIP5]

I might be purchasing a Mazda2 when I get to Japan. I will be there for 3 years and will be able to sell it at a minimal loss.

 

[neit_jnf]

Well, technically a Miller Cycle engine has a supercharger to make up for the lost intake charge in the delayed intake valve closing part of compression.

When not supercharged it is known as an Atkinson Cycle engine which is currently used in some hybrids (not sure if Honda's or Toyota's or both)

From Wikipedia:

The Atkinson cycle may also refer to a four stroke piston engine in which the intake valve is held open longer than normal to allow a reverse flow of intake air into the intake manifold. This reduces the effective compression ratio and, when combined with an increased stroke and/or reduced combustion chamber volume, allows the expansion ratio to exceed the compression ratio while retaining a normal compression pressure. This is desirable for improved fuel economy because the compression ratio in a spark ignition engine is limited by the octane rating of the fuel used. A high expansion ratio delivers a longer power stroke, allowing more expansion of the combustion gases and reducing the amount of heat wasted in the exhaust. This makes for a more efficient engine.
The disadvantage of the four-stroke Atkinson cycle engine versus the more common Otto cycle engine is reduced power density. Because a smaller portion of the intake stroke is devoted to compressing the intake air, an Atkinson cycle engine does not take in as much air as would a similarly-designed and sized Otto cycle engine.
Four stroke engines of this type with this same type of intake valve motion but with forced induction (supercharging) are known as Miller cycle engines.