CONSTRUCTION MACHINE
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-08-31
- Publication Date
- 2026-03-11
AI Technical Summary
Existing construction machines, such as hydraulic excavators, face issues with inconsistent meter-in flow rates to the boom cylinder, leading to mismatched motion speeds and reduced operability during tasks like bumping and jack-up operations due to fluctuating bottom pressures, affecting the intended motion speed and efficiency.
A construction machine equipped with a solenoid valve controlled by a controller that adjusts the meter-in flow rate based on bottom pressure and operation amount, using a boom lowering and raising pressure reducing valves, and a pilot pump system to stabilize the flow rate, ensuring consistent motion speed.
The solution ensures the boom motion corresponds to the required speed, reducing energy loss and improving operability by stabilizing flow rates during varying operational conditions.