Abstract
The evolution of engine performances of our today vehicles involves some “prices” from us, as drivers, also as car manufacturers. Between power and engine gasses evolution must be “an agreement”: if we would like to have low gas emission for our engines, do not expect to achieved top of vehicles performances; also, if we would like to achieve high performances with our cars, we must know that is possible, but the evolution of exhaust species won’t be all the time in normal values. Below we present the evolution of exhaust species, CO, CO2, O2, HC and NOx for our tested vehicle, namely Renault 5, car equipped with a programmable ECU, which was installed with the purpose to obtain higher curves of power and torque. The question was concerning the exhaust species. The article offer, to the engineering of the fields, the conclusion of our team, after theoretical and experimental research: the engines equipped with programmable ECU’s can offer very good performances, but the gas emissions are not always in normal values. The main factor is the traction of the vehicle and the drivers.
Keywords: spark ignition engine, programmable ECU, gas emission, performances.