Pollution control system for diesel engine

A pollution control system for a diesel engine, comprising:

• a PCV valve having an inlet fluidly connected to a crankcase on the diesel engine and an outlet fluidly connected to an intake manifold on the diesel engine;
• a vacuum pump fluidly disposed between the PCV valve and the intake manifold;
• and
• a controller for selectively operating the vacuum pump to increase vacuum pressure on an intake manifold side of the PCV valve relative to a pressure on a crankcase side of the PCV valve based, in part, on measurements from an engine sensor comprising at least one of an engine temperature sensor, an accelerometer sensor, an exhaust sensor, a battery sensor, a PCV valve sensor, a cam position sensor, and/or an engine RPM sensor;
• wherein the vacuum pump lessens vacuum pressure on the intake manifold side during periods of decreased blow-by gas production to decrease the fluid flow rate through the PCV valve, and increases vacuum pressure on the intake manifold side during periods of increased blow-by gas production to increase the fluid flow rate through the PCV valve.