Abstract
In fuel injection measurement, Ideal-State is a state that quantity of flow in pipe will become ZERO flow just before fuel injection. It is necessary a continuous balance control between reduced and intensified pressure. It is achieved by volume up of intensifier and low speed feed control of piston. Fuel supply equipment is consists of hydraulic servo system controlled adaptive robust controller. It is adapted with oil hammer disturbance and parameter change at piston position. The test results are satisfactory as shown in this paper.