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Bosch Start-Stop System to Move to Series Production; Standard Equipment on BMW 1-Series
7 March 2007
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| A specially adapted starter is the central component of the Bosch Smart Electronic Start-Stop System. |
Bosch has developed a Smart Electronic Start-Stop System that is moving into series production at BMW. First variants of the 1-Series will feature it as standard equipment from 1 March 2007.
The Bosch system switches the engine off when the vehicle is stationary, and starts it again automatically as soon as the driver indicates an intention to move off—by depressing the clutch pedal, for example.
The ECE15 measuring cycle, the urban component of the New European Driving Cycle (NEDC), calls for twelve 15 second stops over a distance of seven kilometers. During such a journey, the Bosch system reduces fuel consumption and CO2 emissions by as much as eight percent, depending on the vehicle. If the stops last longer, the actual saving of CO2 emissions and fuel can be significantly higher.
Bosch developers designed a specially adapted starter for the system, the Smart Starter Motor. The company already produces the battery sensor that is needed to detect the battery’s current state of charge and to communicate this information via the energy management system.
There is no need for any further adjustments to the drive train or the engine. This gives the system an excellent cost-benefit ratio, and makes it attractive compared with alternative systems.
The number of engine starts the starter has to make has been significantly increased for this application. In addition, the starter’s improved-performance electric motor, and a low-noise, stronger pinion-engaging mechanism ensure that the engine starts reliably, quickly, and quietly. Despite the increased number of functions, the starter is compact, and can be integrated into the vehicle just as easily and quickly as other starters.
March 7, 2007 in Fuel Efficiency, Vehicle Systems | Permalink | Comments (31) | TrackBack (0)
Comments
Posted by: Patrick | March 08, 2007 at 11:00 PM
DRD T-bone -
it's possible that the technologies came from two separate suppliers neither of whom could offer an integrated solution back when BMW decided on system components for this revamp of the 1 series.
It's also possible that the alternator is located on the transmission side, while the starter motor is on the engine side of the clutch. So far, I haven't seen a diagram of the efficient dynamics package.
Posted by: Rafael Seidl | March 09, 2007 at 07:10 AM
I need more information on the Bosch stop start motor.
Things like the concepts adopted in acieving long life.
Posted by: A.Mageswaran | March 19, 2007 at 11:14 PM
So, to back out of my garage, I just turn on the key, put car in reverse, then engine starts when I hit the gas or remove my foot from the brake.
Will the engine idle in neutral or park with no foot on brake or gas pedal?
If coast the last few feet to a stoplight with car in neutral and not touch the brake or gas will it keep running?
Will the car idle if I need to check my AT fluid?
Posted by: kruisin | March 28, 2007 at 07:28 PM
The Automatic Start/Stop (and also the High Precision Injection) presented by Bosch and used by BMW are already invented by Telcopol Ltd (in Finland) and they are subject to their IPRs (patents) For more info see www.telcopol.com email: vazvan@telcopol.com or b_vazvan@hotmail.com. So it sounds very funny that Bosch or BMW now claims to have developed such innovations. The concept of Volvo in 90's is not a practical neither economic solution. Bosch and BMW first must obtain a license from Telcopol in order to be able to sell cars having these technologies!
Posted by: Sam | August 02, 2007 at 03:49 AM
Hello,
The above mentioned text was sent by me. Here it is again:
The Automatic Start/Stop (and also the High Precision Injection) presented by Bosch and used by BMW are already invented by Telcopol Ltd (in Finland) and they are subject to their IPRs (patents) For more info see www.telcopol.com email: vazvan@telcopol.com or b_vazvan@hotmail.com. So it sounds very funny that Bosch or BMW now claims to have developed such innovations. The concept of Volvo in 90's is not a practical neither economic solution. Bosch and BMW first must obtain a license from Telcopol in order to be able to sell cars having these technologies!
SAM
Posted by: Sam | August 02, 2007 at 03:57 AM
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Yes, I think Ford was one of the first to "turn off" the a/c automatically when at wide open throttle in the older Escort ZX2 from the mid 90s.