Nissan Introduces New Dual Injector System

New injection system works by increasing vaporization making combustion more efficient

Left: One port of the Dual Injector Right: Conventional system injecting to both ports
Nissan Dual Injector System

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carcrazy1234

so wait... basically it just makes the fuel more of a mist? lol thats what i'm seeing in the picture.

July 14, 2009 1:56 pm

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2 replies

scratchy996

yes

July 14, 2009 2:06 pm

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Kepe

Exactly. The smaller the droplets are, the more they have combined surface area, which makes the fuel burn faster. When fuel burns faster, you get more power from the same amount of fuel. More power from the same amount of fuel = the burn process is more efficient = the engine needs less fuel to do the same as the less efficient engine = reduced fuel consumption.

July 14, 2009 2:24 pm

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tarig

instade of that you can have on injector but change the way it oparate (rabid injection)

July 14, 2009 3:14 pm

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benz_man

Good enough idea. It seems like a stop-gap measure to keep costs down in light of Nissans immediate plans. (alot like Sony in the 90's with the SVCD) Don't forget the better the fuel atomization, the cooler the combustion charge is. That means compression ratio can increase and thus...more power (and efficiency). However, this wouldn't be as efficient as DI and a turbo, but its not off by far.

July 14, 2009 5:44 pm

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out4ride

How or why is this any better from fsi where the fuel is atomized?

July 14, 2009 8:31 pm

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2 replies

isaacarus

its not, its probably worse considering that fsi was direct injection as well? find it hard to believe they think external injection is the tech to follow with...

July 15, 2009 3:27 am

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genie

I think this system is supposed to be a compromise. Not as good as DI, but no where near as expensive, which is important when you think small displacement engines typically go in small cheap cars.

July 15, 2009 11:17 am

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APPASO

it gives less efficiency still its very useful.

September 30, 2009 5:21 am

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