Low Speed Hydraulic Control for Fine Crane Operation
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Solution Overview
Problem
Hydraulic systems, such as those powering cranes, often operate at full engine and hydraulic output regardless of the load applied, leading to inefficiency and reduced engine and hydraulic part lifespan, as well as difficulty in precise control for users.
Innovation Solution
A system and method for fine control of hydraulic cranes, featuring a service pack with an engine and hydraulic pump that can operate at low speeds, with a control system locking the engine in a low speed range and controlling hydraulic output proportionally to trigger activation, allowing for precise adjustment of hydraulic flow rate or pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If full engine speed and full hydraulic output are used, then sufficient power is available for heavy loads, but fuel efficiency deteriorates and engine wear increases
Solution Approach 1:
The system dynamically adjusts engine speed based on actual hydraulic load demand. The control system continuously monitors hydraulic pump demand and modulates engine RPM accordingly, allowing the engine to operate at lower speeds when full power is not needed, thereby improving fuel efficiency while maintaining sufficient power availability when required
Solution Approach 2:
The system changes the operating parameters of the engine by implementing variable speed operation. Instead of running at constant high speed, the engine speed parameter is adjusted to match the actual hydraulic load requirements, enabling efficient operation across different load conditions while preserving the capability to deliver full power when needed
2Power
If full engine speed and full hydraulic output are used, then sufficient power is available for heavy loads, but engine and hydraulic part lifespan deteriorates
Solution Approach 1:
The system dynamically adjusts engine speed based on actual hydraulic load demand. The control system continuously monitors hydraulic pump demand and modulates engine RPM accordingly, allowing the engine to operate at lower speeds when full power is not needed, thereby improving fuel efficiency while maintaining sufficient power availability when required
Solution Approach 2:
The system changes the operating parameters of the engine by implementing variable speed operation. Instead of running at constant high speed, the engine speed parameter is adjusted to match the actual hydraulic load requirements, enabling efficient operation across different load conditions while preserving the capability to deliver full power when needed
3Measurement precision
If proportional control of hydraulic output is implemented, then fine control precision is improved, but control system complexity increases
Solution Approach 1:
The control system implements feedback by continuously monitoring the actual hydraulic load demand and comparing it with the desired output. This feedback mechanism enables precise proportional control of hydraulic flow by adjusting engine speed and pump output based on real-time load conditions, achieving fine control without requiring overly complex control architecture
Solution Approach 2:
The system achieves self-service control where the hydraulic system automatically adjusts its own operation based on load demand. The control system monitors hydraulic pressure and flow requirements and autonomously modulates engine speed and pump output, eliminating the need for complex external control mechanisms while maintaining precise control
Data Source
AI summary
The present disclosure provides embodiments directed towards a method and a system for fine control of hydraulic cranes. In one embodiment, a system is provided. The system includes a service pack having an engine. The engine has an operating speed ranging from a low speed to a high speed, a hydraulic pump coupled to the engine, wherein the hydraulic pump is configured to supply a hydraulic output to a hydraulic load, and a control system configured to control the hydraulic output. The control system includes a fine control mode configured to lock the engine in the low speed and control the hydraulic output in proportion to a percentage of a trigger activation.