A plunger with a helical moves in a barrel with a suction and spill port. The plunger turns in the barrel aligning the helical grove with the spill port for varying end of injection. Cavitation is reduced by a spring loaded piston and orifice which can absorb and damp out fluctuation. adjustment can be
done by adjusting either height of plunger or barrel. In VIT adjustment is done by adjusting barrel, the barrel has an outside threaded portion which engages into the timing guide operated by a toothed rack. Movement of the rack causes the pump barrel to move vertically up or down relative to the pump plunger.
done by adjusting either height of plunger or barrel. In VIT adjustment is done by adjusting barrel, the barrel has an outside threaded portion which engages into the timing guide operated by a toothed rack. Movement of the rack causes the pump barrel to move vertically up or down relative to the pump plunger.
Comments