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Integrated starter alternator reversible system

Development of a new technology allowing a very high level of integration applied to the automotive industry to extend the 'stop-start' functionality for high volumes at low cost.

VALEO has developed the first generation of 'Stop-Start' systems (VALEO StARS: Starter Alternator Reversible System), today in serial production with CITROEN. StARS performs a comfortable 'Stop-Start' function in complete transparency for the driver: the belt driven starter-alternator system shuts down the engine during idle phases and restarts the engine quickly and silently on request. This results in no fuel consumption, gas emission, vibration or noise at standstill. Furthermore, StARS allows for a high efficiency alternator mode featuring synchronous rectifying and allowing for a better energy balance of the vehicle. Based on this initial experience, VALEO wants to launch the second generation of 'Stop-Start' systems dedicated to big production volumes. Tomorrow's hybrid solutions have to be as minimally intrusive as possible on standard mass produced powertrains. This low intrusiveness calls for a high level of integration between the electrical machine assisting the internal combustion engine and its associated power and control electronics. This high level of integration imposes harsh thermo-mechanical constraints on the whole system, pushing away standard electronic assembly technologies as well as robust electronics developed for railway and industrial applications which do not correspond to automotive industrial requirements in terms of flexibility, yield and cost. The main objective of the project is to integrate all the power electronics and a part of the control electronics at the back of the machine. (Today on the first generation of system, the electronics are located in a separate box). Therefore, specific electronic components have to be developed to meet this challenge: AMIs for the ASIC (Application Specific Integrated Circuits) design. The research and development is performed in Creteil (South of Paris) while the manufacturing plant is located in Etaples sur mer (North of France). Car manufacturers will test I-STARS on vehicles. Keywords: automotive hybrid.
Acronym: 
I-STARS
Project ID: 
3 734
Start date: 
02-04-2006
Project Duration: 
48months
Project costs: 
9 850 000.00€
Technological Area: 
Road Vehicles technology
Market Area: 
Motor Vehicles, Transportation Equipment and Parts

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