Original Quality VE Type Delivery Valve 096420-0510 for MITSUBISHI/TOYOTA 2C -T/ 1C /4D6

High-pressure common rail pump suction and pumping process in the discharge valve seat high-pressure sealing surface at the negative pressure, positive pressure frequent alternating changes when the plunger pump internal oil pressure is lower than the corresponding temperature of the saturated vapour pressure of the oil dissolved in the air precipitation to produce a large number of air bubbles or cavities bubbles are brought into the high pressure area of the common rail pump under the action of high-pressure rapid collapse of bubbles collapsed when the instantaneous impact on the metal surfaces of the piston pump produces a great mechanical damage This process is called cavitation cavitation leads to the failure of the high pressure seal of the outlet valve cavitation leads to the failure of the high pressure seal of the outlet valve in the blue arrow is the direction of the cavitation valve body position A gathering of large bubbles rupture caused by cavitation cavitation pits lead to the high pressure sealing contact surface reduces the contact stress becomes large high pressure sealing surface in the valve body reciprocating movement knocking process produces crack cracks cracks to the position B, C expanding with the increase in the number of cracks Position C material gradually flaking seal failure

Optimise the valve structure by analysing the valve structure and cavitation mechanism:Increase the grooves on the sealing surface of the valve to transfer the air bubbles from the valve seat to the groovesIncrease the connecting holes to open and close the valve quickly so that the pressure can achieve equilibrium more quicklyReduce the probability of air bubbles precipitating and burstingIncrease the guiding grooves on the guiding surface of the valve to make the precipitated bubbles uniformly distributed along the circumference of the valve to prevent the air bubbles from clustering in a particular position of a particular valve and accelerate high pressure. Sealing surface cavitation.

After reducing the wall thickness of the groove, the number of air bubbles at the high-pressure sealing surface and the pressure can be significantly reduced, which can effectively reduce the cavitation of the high-pressure sealing surface.