Comparative evaluation of valve control strategy for two types of valves in digital displacement pump for improved performance

The paper addresses the challenges related to counteracting these valve delays in digital displacement pumps (DDPs) and proposes an innovative control strategy. The focus is on mitigating delays in the closing angles of the low-pressure valves (LPVs) and high-pressure valves
(HPVs), which can lead to back-flow, reduced efficiency, and potential component fatigue. The
proposed iterative control algorithm for LPV closing dynamically adjusts the closing angle
based on the machine’s rotational angle, effectively reducing back-flow and improving pump
efficiency. Additionally, the concept of Partially Actively Controlled (PAC) HPV is introduced,
where the solenoid actively contributes to HPV closure, hereby aiding in reducing delays in LPV
opening and increasing pump inlet capacity. The paper concludes with the importance of experimental validation and real-world implementation for assessing the proposed control schemes’
effectiveness in diverse operating conditions. In the future scope of work, the study will focus
on wheel loader traction operations as an application scenario, employing MATLAB/Mevea
co-simulation to assess the performance of the pump equipped with the aforementioned valves
along with the experimental validation.