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Bosch start-stop system to reduce consumption and CO2 emissions by 8% Print E-mail
Written by Vijay   
Thursday, 07 August 2008
Bangalore: Bosch has developed a start-stop system that switches off the combustion engine when the vehicle is stationary – in traffic jams or at red lights, for example. With special emphasis on city driving, this technology significantly reduces fuel consumption.

This and other systems supplied by Bosch will help to reduce CO2 emissions further in the future; the technology has been stated to have been used in production at BMW wherein Bosch supplies the key component for this system: a starter that has been developed specifically for this application. 

Start-stop systems reduce consumption and CO2 emissions in city driving by as much as eight percent

Increasing fuel prices, ever stricter emission limits, and the objective to reduce CO2 emissions further call for innovative solutions. One cost-effective way of conserving resources and protecting the environment is the Bosch Smart Electronic start-stop system.

It switches the engine off when the vehicle is stationary, and starts it again automatically as soon as the driver wishes to move off again – an intention which can be indicated by depressing the clutch pedal, for example. During a journey of 12 - 15 second stops over a distance of seven kilometers, 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.

For the Bosch start-stop approach, developers have designed a specially adapted starter, the Smart Starter Motor. There is no need for any further adjustments to the drive train or the engine. This gives the system its excellent cost-benefit ratio, and makes it so attractive compared with alternative systems. The number of engine starts the starter has to make – its service life, in other words – 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.

Bosch has drawn on its combined competence in drive trains, energy management, and starter technology to develop this system and its control function. 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.

Last Updated ( Friday, 08 August 2008 )
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