Engine crankcase monitoring system
Oil vapors and gases that have broken into the crankcase through the piston rings are drawn into the area of the cylinder head above the camshaft through a hose. From here they enter the intake manifold / throttle body (subject to availability) and/or into an air box located on the throttle/carburetor body, where they are mixed with a clean air/fuel mixture and burned.
Some models may have a strainer inside the camshaft cover, which must be washed with kerosene if it is visibly dirty.
Exhaust gas cleaning system
To reduce emissions of harmful substances into the atmosphere, all models with fuel injection are equipped with a catalytic converter (see section "catalytic converter", Part "IN" this chapter), which is located in the exhaust system. System "closed", the oxygen content sensor in the exhaust gases sends signals to the electronic fuel system control unit, which allows you to adjust the air / fuel ratio in the mixture within very tight limits.
Fuel vapor control system
To minimize the emission of unburned hydrocarbons into the atmosphere, some models are equipped with a fuel evaporation control system. The filler neck of the fuel tank is sealed to prevent vapors from escaping into the atmosphere, and a box is located under the right wheel arch (with activated carbon) to absorb fuel vapors, from where they are sent to the intake tract and further to the engine cylinders, where they burn out.
Exhaust gas recirculation system
The exhaust gas recirculation system is designed to bypass small amounts of them into the intake tract and subsequent afterburning. This process reduces the level of nitrogen oxides emitted into the atmosphere.
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