Investigating the matching characteristic of the full hydraulic braking system of the wheel loader

Aiming at the pressure loss existing in the full hydraulic braking system experiment of wheel loader, the key parameters affecting the performance of the braking system were optimized by an orthogonal test based on the theoretical analysis, and the optimal combination of key parameters was obtained. A simulation model of the AMEsim braking system was built to verify the optimal combination obtained from the orthogonal test. The simulation curves show that the optimized braking system could shorten the filling time by 5.3%, reduce the pressure loss by 29.7%, and save energy by 12.2%. It is a creative proposal to install a controllable relief valve at a specific position of the braking system to reduce the pressure loss when the existing fluid is not filled. The numerical results show that the pressure loss is reduced from 28.1 to 7.05 bar, reducing 74.9% without affecting the requirements of the braking system. This paper provides a feasible method for parameter matching of wheel loader braking systems and opens up a new way to control pressure loss.