On Thu, Oct 01, 2015 at 06:13:08PM +0000, jim bell wrote:
There probably isn't any specific "defeat device". These days, probably all fuel engines are controlled by complex computer programs, that take various inputs (ambient temperature, ambient air pressure, engine temperature, and perhaps others) and make complicated adjustments in inputs to the engine, in order to make the engine run better in various ways. In other words, the "defeat device" is in the software, not the hardware. Jim bell
I read it is known that the software detected via sensors that the car is in a lab (almost sure on a stand) and switched to "clean mode" (check wikipedia and their sources). According to local news Mercedes also cheated, but polluted less.