With Multi-locomotive, it will improve the performance of traction and cut down the employee without changing anything of the locomotive , and it will improve the benefit and the competition ability of the Railway Department by this way.

With the development of the computer control technology, the Multi-locomotive technology is also under continuously development.

Simulation analysis of pump and valve combined EHA efficiency design;

According to the working characteristics of the pump and valve combined EHA (Electrical Hydraulic Actuator), the method to improve the system efficiency by increasing the design value of load pressure was proposed.

Two parallel-placed needle valves with opposite flow direction referred as two-valved configuration instead of traditional single-valved configuration as double-inlet are adopted to control DC flow and are proved to be a successful way to decrease the refrigeration temperature of a single-stage pulse tube cryocooler below 20 K.

Analysis of scald accident in repairing unite-valve of high-pressure heater;