[17] ENGINE AND EMISSION CONTROL - - EMISSION CONTROL <MPI> - CRANKCASE EMISSION CONTROL SYSTEM - GENERAL INFORMATION (CRANKCASE EMISSION CONTROL SYSTEM) | PRINT PAGE / INDEX / PRIOR / NEXT

CRANKCASE EMISSION CONTROL SYSTEM

GENERAL INFORMATION (CRANKCASE EMISSION CONTROL SYSTEM)
The crankcase emission control system prevents blow-by gases from escaping inside the crankcase into the atmosphere. Fresh air is sent from the air cleaner into the crankcase through the breather hose. The air becomes mixed with the blow-by gases inside the crankcase. The blow-by gas inside the crankcase is drawn into the intake manifold through the positive crankcase ventilation (PCV) valve. The PCV valve lifts the plunger according to the intake manifold vacuum so as to regulate the flow of blow-by gas properly. In other words, the blow-by gas flow is regulated during low load engine operation to maintain engine stability, while the flow is increased during high load operation to improve the ventilation performance.
SYSTEM DIAGRAM

[17] ENGINE AND EMISSION CONTROL - - EMISSION CONTROL <MPI> - CRANKCASE EMISSION CONTROL SYSTEM - GENERAL INFORMATION (CRANKCASE EMISSION CONTROL SYSTEM) | PRINT PAGE / INDEX / PRIOR / NEXT

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