Some measurement to improve road adhension utilization and the system performance are developed.

Development of testing system for adhesion coefficient utilization;

Preparing for developing the eight-axle locomotive in our country,it is established the model of 2B0—2B0 axle locomotive with equilibrium for axle load transfer and investigated the influence of traction height、wheelbase、primary and secondary suspension stiffness and the longitudinal disposal of secondary suspension on adhesion availability.

So it is hard to realize optimum adhesion availability if the horizontal traction device is taken.

The influence of secondary suspension distribution,wheel wearing,coupler height,primary and secondary vertical suspension stiffness,traction height of per bogie,distance from suspension point of traction motor to centerline of axle,between centers of two bogies and wheelbase on adhesion availability of B0-B0-B0 axle hung locomotive is analyzed.

The analysis results show : as long as the equivalent traction height is same as the optimum traction height, the optimum rate of adhesion usage can be reached for the locomotive with Z traction rod ; as long as the nominal traction height is same as the optimum traction height, approximate optimum rate of adhesion usage can be reached for the locomotive with single traction rod.