Emission of exhaust gases

The content of toxic components in the exhaust gas (CO, CH, NOx) is controlled by a combination of changes in the engine and by adding special management items.

Changes to the combustion chambers, an intake manifold and a camshaft ignition system form the main control system.

The above changes have been merged into an effective system that controls the emission control maintaining good handling and fuel efficiency of the engine.

The control system composition of the fuel-air mixture

(a system of fuel injection (MFI))

Using the oxygen sensor signals, the system fuel injection (MFI) controls the timing and duration of the opening of the open state of the injector installed in the intake manifold for each cylinder, so as to provide an optimal composition of the fuel-air mixture and reduce emissions.

Because of this the exhaust gases produced by the engine correspond to the special composition, which gives the possibility of using three-way catalyst to reduce the concentration of toxic substances. The catalytic converter is used to convert the three groups of harmful substances (hydrocarbons 1 (CH) 2, carbon monoxide (CO) 3 and nitrogen oxides (NOx)) in harmless substances.

The system of fuel injection (MFI) can operate in two modes:

- Control without feedback on the composition of air-fuel mixture (?�open-loop?�) in accordance with data recorded previously in the electronic engine control unit;

- A feedback control on the composition of the air-fuel mixture (?�closed-loop?�) in accordance with the oxygen sensor signals coming into the electronic engine control unit.