need a full project planing, calculation, CAD design and description that shows the using of epicyclic gear box attached to the car engine and connected to the car drive pulley and make it variable pulley. so it should be in constant ration while the drive ( main pulley is changeable when driving the car ) with making sure it is working all the time while the engine is working. moreover, it will worked a small air compressor to allow the driver to use it to fill up another car tyres. on the other hand it can be attached to work a generator for small trucks use to work the refrigerator. so it must work all the time while the engine is on. I will attached many files to support it.