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Nissan/Infiniti VC-Turbo Engine #4709084
03/27/18 11:35 PM
03/27/18 11:35 PM
Joined: Jun 2002
Posts: 19,308
Iowegia - USA
MolaKule Offline OP
MolaKule  Offline OP
Joined: Jun 2002
Posts: 19,308
Iowegia - USA
If this has been discussed before please ignore.

But Nissan/Infiniti will be introducing this new engine soon, a Turbo-Charged Variable-Compression ratio engine.

Interesting mechanical setup.

https://www.youtube.com/watch?v=9qkqp39eLc8


Reading is fundamental; understanding requires Study and an Open Mind.
Re: Nissan/Infiniti VC-Turbo Engine [Re: MolaKule] #4709207
03/28/18 06:54 AM
03/28/18 06:54 AM
Joined: Dec 2017
Posts: 2,515
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,515
SE British Columbia, Canada
Very interesting. Thanks for sharing. They could have done a better job to explain how turbos work better with low compression but otherwise easy to understand. A few exrtra do-dads for your oil to care of.


If you want the job done right......do it yourself.
Re: Nissan/Infiniti VC-Turbo Engine [Re: MolaKule] #4709317
03/28/18 08:44 AM
03/28/18 08:44 AM
Joined: Oct 2014
Posts: 12,036
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,036
Idaho
That is a huge change in the auto engine design.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Nissan/Infiniti VC-Turbo Engine [Re: MolaKule] #4709502
03/28/18 11:38 AM
03/28/18 11:38 AM
Joined: Sep 2014
Posts: 2,137
US-WA
Dyusik Offline
Dyusik  Offline
Joined: Sep 2014
Posts: 2,137
US-WA
Looks like more things that can potentially fail. Just give me a two stroke diesel and let me go home.


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Re: Nissan/Infiniti VC-Turbo Engine [Re: MolaKule] #4709575
03/28/18 12:44 PM
03/28/18 12:44 PM
Joined: Jan 2004
Posts: 4,248
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,248
California
The turbo looks like it'll provide smoother boost - it looks like a blended dual-scroll design without having to resort to VGT(Honeywell) or VNT(Cummins/Holset), keeps in-house with IHI or Hitachi. Interesting linkage, it does remind me a little bit of Honda's VTEC, but also how ovalized chain rings are now being used on bikes.

I'm thinking Nissan looked at how Saab wanted to make a variable-displacement engine - but wanted to stick to a conventional block without a bellows. The VC mechanism fits in the same space in the crankcase as a balance shaft but given Nissan's proclivity for cost cutting...

Re: Nissan/Infiniti VC-Turbo Engine [Re: MolaKule] #4709714
03/28/18 02:47 PM
03/28/18 02:47 PM
Joined: Aug 2003
Posts: 10,877
Buffalo, NY
JTK Offline
JTK  Offline
Joined: Aug 2003
Posts: 10,877
Buffalo, NY
It does seem like a lot more components for the engine to fling around. More bearings and friction, but with the elimination of balance shafts it's perhaps not so bad. The turbo definitely adds additional complexity.


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