Gen V - (Dupe?)
Burning Brakes
Joined: Jul 2004
Posts: 874
Likes: 18
From: Texas
5.3L:
2014 Base Vette ~440HP
2014 Tahoe/Yukon
2014 Camaro
6.2L:
2014 Trucks
2014 Vette Grand Sport ~485HP
Last edited by VETTEMANN; Sep 29, 2012 at 12:24 AM.
Racer
Joined: May 2008
Posts: 379
Likes: 2
From: Mont Belvieu Texas
GM released information in their restructuring plans that indicated HCCI was about to surface, projected for 2015. The sensor bungs in the manifolds may be the biggest indicator that HCCI may make its debut on the Gen V. The autoignition process of HCCI is highly temperature dependent and the monitoring of the combustion health of individual cylinders may be necessary.
http://video.popularmechanics.com/se...tid=1527780253
Drifting
Joined: Feb 2002
Posts: 1,260
Likes: 0
From: Chapel Hill NC
GM released information in their restructuring plans that indicated HCCI was about to surface, projected for 2015. The sensor bungs in the manifolds may be the biggest indicator that HCCI may make its debut on the Gen V. The autoignition process of HCCI is highly temperature dependent and the monitoring of the combustion health of individual cylinders may be necessary.
SI (spark ignition) - in production
WG-SIDI (Wall-Guided Spark-Ignition Direct-Injection) - in production
SG-SIDI (Spray-Guided Spark-Ignition Direct-Injection) - near production
HCCI (Homogeneous-Charge Compression-Ignition) - still in resaerch
So, IMO, WG and/or SG, SIDI is more likely to show up on Gen V engines initially instead of HCCI.
Advanced
Joined: Mar 2012
Posts: 92
Likes: 0
From: DFW
It is true that HCCI is still in research, there are significant problems for the stability of HCCI to be run over all operating ranges. Though, I do not think it's an irrelevant lab project either, for GM has already demonstrated a functional HCCI vehicle years ago (08 or 09?). The advantage of HCCI over the technologies listed, is that it does not require stoichiometric ratios so the amount of fuel injected then becomes a function of how much power is desired. The maximum power yield is strictly limited though because of the 50-90% EGR that's required to add enough heat to auto ignite the charge. That disadvantage goes away when you're talking about a dual phase motor, it even becomes an advantage that will yield efficiency for cruise conditions. Unthrottled and without pumping losses, much of efficiency gap is bridged for large displacement engines. Not to mention HCCI is more thermodynamically efficient. IMO HCCI's looking pretty suspect for the new combustion technology Gen V's been claimed to feature.
One of the easiest ways to control heat on the fly, and so extend the operating range, would be with dynamic compression. I would guess a combination of VVL/VVT.
One of the easiest ways to control heat on the fly, and so extend the operating range, would be with dynamic compression. I would guess a combination of VVL/VVT.
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Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
But, the C7 dosen't need 480 HP to get to 60 under 4 seconds. The C6 Grand Sport will do 0-60 in 3.95 seconds with 436 HP. Knock of 150 pounds and you are now down to 3.8 seconds 0-60.
"The 2013 Grand Sport Coupe
It will make your heart race, whether you’re on the track or not. The 2013 Grand Sport coupe is the only luxury sports car in its class to boast 0–60 mph under four seconds, 1g cornering capability and an impressive 26 MPG highway† fuel economy for an unmatched combination of performance and efficiency."
http://www.chevrolet.com/corvette-grand-sport.html