This master thesis is a project commissioned by AVL Södertälje Powertrain Engineering AB.The purpose has been to develop a control system for an electronic pneumatic-hydraulic valve actuation system installed in a one cylinder test engine.Hydraulic fracturing, as a mining technique, was first developed in 1947 and has proven to be very popular in the United States in recent years.
This master thesis is a project commissioned by AVL Södertälje Powertrain Engineering AB.
Attention is paid to the behaviour during transitions when the flow is decelerating.
Flow reversal is often accompanied with the check valve slam, because the check valve closes with a delay after the flow changes its direction.
Firstly, the numerical model was established after analyzing the solenoid valve during its start-up and shut-down.
Comparing the simulation data with the practical data, it is verified that the numerical simulation model has a high feasibility.
The maximal back flow velocity determines the maximal pressure peak when the check valve closes, so this velocity was found for different flow decelerations.