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Saturn Vue Green Line Hybrid

75 messages,  Last post on Feb 17, 2009 at 5:25 PM

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What is this discussion about? Saturn VUE, Hybrid Cars


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#15 of 75
It is called the "belt alternator starter system" by stevedebi
Feb 16, 2006 (12:53 pm)
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Here is what I found on wikipedia:
 
"General Motors will introduce a mild hybrid system called belt alternator starter (or BAS) in the 2006 Saturn VUE Green Line. It operates similar to the "start-stop" system used in the Chevrolet Silverado Hybrid in that it shuts down the engine when the vehicle comes to a stop and instantly restarts it when the accelerator is pressed. A 48 volt electrical system is used to operate all accessory equipment, from the air conditioning to the lighting, making the system essentially invisible to the driver.
 
The BAS system goes slightly further than the Silverado, however, in providing some modest power assist for "acceleration feel", according to GM. Although not as effective as other systems, the BAS system is expected to provide about 15% fuel efficiency gain for the compact VUE.
 
One major benefit of the BAS technology is that it fits in the same space as a conventional engine. No modifications were required to the VUE's chassis to accommodate the BAS system, with the battery pack housed in the spare tire well. This allows the VUE Green Line to be produced on the same assembly line as the normal VUE, producing substantial cost savings and allowing the company to adjust production more easily.
 
The BAS system uses a conventional 4T45-E automatic transmission."
#16 of 75
One more good reference by stevedebi
Feb 16, 2006 (1:00 pm)
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The belt alternator starter replaces the conventional alternator. Considering that electric power is not routed to the transmission at any time, I wonder if this is really a hybrid at all. It does incorporate regenerative braking.
 
http://tinyurl.com/btnu2
 
"How Does It Work?
The BAS concept is to replace the belt driven alternator with an electric motor that serve as a generator and a motor. Thus when the engine is running the motor, and acting as a generator, the system will charge a separate 36 volt battery. When the engine needs to be started, the motor then applies its torque via the accessory belt, and cranks the engine instead of using the starter motor.
 
In this scheme, the motor/generator can be made larger than a standard starter motor so more torque can be generated when in the motoring mode. This allows for quicker starts of the engine, and makes the start/stop operation possible. Stopping the engine while vehicle is at idle is a means to conserve fuel. The disadvantage to this type of system is that you notice the engine starting and stopping. The control system for this technology so far has been somewhat crude in comparison to the full hybrid engine startups and for some people it could be annoying.
 
The belt is a short-term solution to get two percent to five percent increase in fuel economy and it mostly affects the city mileage with hardly any effect on the highway mileage. On extremely small vehicles, the belt alternator starter might nudge a vehicle into the mild hybrid category. Otherwise, consumers should know that dealers describing vehicles with this technology as hybrids are defining hybrid technology in the broadest sense. "
#18 of 75
Re: One more good reference [stevedebi] by logic1
Feb 16, 2006 (1:16 pm)
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Replying to: stevedebi (Feb 16, 2006 1:00 pm)

Stopping the engine while vehicle is at idle is a means to conserve fuel. The disadvantage to this type of system is that you notice the engine starting and stopping. The control system for this technology so far has been somewhat crude in comparison to the full hybrid engine startups and for some people it could be annoying.
 
The Edmunds first drive says starting and stopping the engine is not noticeable.
 
Otherwise, I think the quote is correct in that the Vue hybrid will probably show the best savings in stop and go driving over highway.
#22 of 75
Exhaust Emissions & Flex Fuel by jagaman
Feb 18, 2006 (8:25 pm)
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The Green Line Vue sounds like something I would be interested in, but I can't seem to find anything about the exhaust emissions, how do they stack up to CARB's requirements? Do they exceed the 2007 requirements? How do the stack up to the import hybrid emisssions?
 
Since all California Fuels contain an average of 6% ethanol and E85 would be a delight, but may not happen for awhile how does the Green Line stack up with the Flex Fuels?

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