1 - Cylinder head;
2 - Collector;
3 - The pipeline of the oil vapor recovery system, connected to the over-throttle space of the throttle valve (the circuit is used for medium and heavy loads);
4 - The pipeline of the oil vapor recovery system, connected to the throttle space of the throttle valve.
Examination
To ensure the normal operation of the emission control system, the oil vapor recovery system must be kept clean and in good condition.