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Hi Guys


There's been a lot of activity recently regarding the "Stop Start System" fitted to the
PeugeotModels. So I've had a dig around and found the following. Now no doubt a lot of you have seen this stuff before but for the
uninitiated it either makesinteresting reading or you're likely to fall asleep before you've read it all.

It would appear that the system our little cars have is one of the better ones. But it all depends on battery condition and as the cars get older that battery will need replacing sooner.






But there's another, even more advanced version of engine stop-start that you'll find in Peugeot and Citroen cars. The two French companies share parts and use the same system, which makes use of a so-called ""˜reversible' alternator and capacitors to store reclaimed energy.The system was introduced toPeugeot's
by the first generation 308. The alternator can reverse its polarity, switching its function to become a generator and reclaiming energy that would otherwise be lost.
It stuffs the capacitors full of electricity that the alternator then piles back into the engine and restarts combustion in just 400 milliseconds. Once the engine is warm, the alternator takes care of all restarting duties. Like Mazda's system, the fuel savings are immediate when the engine cuts out.
Peugeot estimates that 15% of the time taken for a typical commute is spent stationary, and even includes a dedicated stop-start timer within its models' trip computers so that owners can see the benefit.

For the first time on a PEUGEOT, a Stop & Start system with alternator-starter ""“ or reversible alternator ""“ has been adapted for operation with an automatic gearbox. Recognised as the best system in the market, the e-HDi micro-hybrid technology contributes towards the reduction of CO2 emissions, which can be as much as 15 % lower on the urban cycle. As regards comfort in use, it also has many strong points: silence, speed of operation, absence of vibration, on-board systems maintained and operation in a temperature range down as low as -5 °C.

Belt Driven Starter Generator Fitted To The Peugeot Citroen Range Of Vehicles
The Belt Driven Starter Generator (BSG) system utilizes a different method to start the engine: a reversible alternator which also acts as an electric motor, in this case mimicking a starter motor. The BSG is integrated into the belt drive system of a conventional combustion engine in the same way a normal alternator is, as it has the same fixing points. The main difference with a standard belt drive system is the reinforcement of the belt tensioning, the BSG acts bidirectional on the belt to speed up the combustion engine during start-up.For small engines a conventional starter is not needed while it is required for larger ones.

<h2 style="margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: line; clear: both; : rgb246, 246, 246;">The main advantages of this solution, other than the moderate cost, are the smoother restarts provided and the capability to stop the combustion engine while the vehicle is still driving (up to 20 km/h for automatic and 8 km/h for manual).Valeo has pioneered this technology, and today also Bosch and Denso have this type of solution. PSA (Peugeot and Citroen), Mercedes-Benz and Smart in Europe and GM in North America are the main manufacturers offering models featuring BSG solutions.</h2><h2 style="margin: 0px; padding: 0px; border: 0px; outline: 0px; clear: both; line-height: 21px;">The Naysayers</h2>

<h2 style="margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: line; clear: both; : rgb246, 246, 246;">Several criticisms have been expressed in regards to the Start-Stop technology, and while some can be classified as ""urban myths""� others should be considered.The final ""myth""� is that starting an engine burns more gaso­line than idling for an hour: while a cold engine runs rich, consuming more fuel than normal, an engine already at optimum operating temperature does not use an excessive amount of fuel starting and stopping. Bosch says that in combination with a modern gasoline engine, the amount of fuel required for warm starting is only the same as that used when idling for 0.7 seconds.There are two areas where concerns around the effectiveness of Start-Stop System have more solid ground: the additional wear that the increased number of engine start and stops will bring and if the savings provided actually cover the additional cost of the Start-Stop system itself. Regarding the additional wear to some of the engines components, i.e. battery and starter motor, have been specifically engineered for the extra usage and will not be affected. There are, as of yet, no analysis on what long term effects there could be to certain components. Especially concerning turbochargers and crankshafts. It should also be noted that long-duration idling causes more oil and oil filter deterioration and increases the need for more oil and filter changes. Similarly, the longer the idling time causing wear, the sooner the engine itself will need to be rebuilt.
And finallyhttp://www.environment.peugeot.co.uk/e-hdi-micro-hybrid-technology/
http://i4frfewriting.wikispaces.com/file/view/English+report+-RIGOUR+NOCQUET.pdf

Guys you make your own mind up is it good or the work of Beelzebub the devil
</h2>




Edited by: uncletone
 
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