2004 - 2008 Lamborghini Gallardo V10 5.0L. 2014 2015 Audi R8 V10 5.2L V8 4.2L. The function of the accumulator is to catch and trap liquid refrigerant from the evaporator to protect the compressor. The accumulator also contains a strainer and desiccant for refrigerant cleaning and purification.