6.4. The control of the fulfilled gases

THE GENERAL DATA

To minimise quantity of pollution which get to the atmosphere, some models are equipped by the catalyst in release system. On all models with the catalyst the system has the closed type where the ljambda-gauge in release system informs the ignitions given to system and injection of fuel ECU by a constant feedback, allowing ECU to regulate a mix to provide the best possible conditions for catalyst work.

The ljambda-gauge has the built in element of heating operated ECU through the relay quickly to warm up a tip of the gauge to working temperature. The gauge tip is sensitive to oxygen and sends ECU the pressure changing depending on quantity of oxygen in exhaust gases. If топливовоздушная a mix too rich, exhaust gases have the low maintenance of oxygen and the gauge sends a low-voltage signal. Pressure increase occurs at mix pauperisation when the quantity of oxygen in exhaust gases raises. Peak efficiency of full and correct combustion of fuel occurs, if the mix "air-fuel" submitted to the engine, is supported in chemically correct relation for full combustion of gasoline – 14,7 weight parts of air to 1 part of fuel ("стехиометрическое" the relation). Target pressure of the gauge changes in the big interval in this point, ECU uses changes of a signal and corrects the mix "air-fuel" submitted to the engine, changing width of an impulse of a fuel atomizer (an interval of time when the injector is opened).