This impulsion tool uses a high speed on-off valve to control to-and-fro motion of the distributing oil valve core, which impels the cylinder rod to-and-fro motion to form impulsion.

The dissertation analyzes several different hydraulic controlling valves, mainly high speed on-off valves.

Simulation and experimental investigation on pressure dynamics of pneumatic high-speed on/off valves;

Electronically assisted braking system for vehicles based on a high-speed on/off valve;

The Research on the Electro-hydraulic Control System with High-speed ON/OFF Valve;

Research and application of a new PWM high speed on/off valve;

According to the slow response of electro-hydraulic actuator driven by single high speed on/off valve,which was leaded by the restrained volume of high speed on-off valve,the solution that using a high speed on-off valve as the pilot valve and a secondary valve as the distributing valve was presented.

High speed on/off valve is an excellent conversion element which has been developed since 1980 s, it has many merits such as high response speed , good ability of resisting contaminated oil and capability of assorting well with electro circuit.

A hydraulic cylinder position control system,which was based on the pilot control of the high-speed on-off valve,was designed according with the demands of hydraulic pressure drive system of hydraulic manipulators.

Main delay of high-speed on-off valve results usually from the t im e -constant of solenoid-in ductance.

Integrated analysis on design theory and control mode of robot manipulators hydraulic driven system at home and abroad have been made in detail, then a new robot manipulators hydraulic driven system based on high-speed on-off valve pilot control is proposed in this paper.

In order to improve the switching speed of an electro hydraulic high speed on off valve and the digital control accuracy of the fluid pulse width modulation (PWM), this paper made some researches about using the rare earth alloy giant magnetostrictive as an actuator to drive the hydraulic on off valve, and a kind of new high speed on off valve with a special structure was made.

This paper develops the control system of electronically controlled throttle with high speed on off valve.

After remolding its variable capacity machinery, the author researches a new variable capactiy servo hydraulci organization base on high speed on off valve pressure control system and achieve the output pressure control of the constant pressure variable capacity pump.