Electro-Hydraulic Charging Control via Engine Speed Feedback
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Solution Overview
Problem
Existing hydraulic braking systems face efficiency losses due to parasitic loads, particularly when starting machines at low temperatures or high altitudes, as they do not effectively control engine power distribution for improved machine performance in these conditions.
Innovation Solution
A control system for an electro-hydraulic charging system that includes sensors to monitor engine parameters and a controller to stabilize engine operation, ensuring efficient charging and reduced parasitic loads by managing fluid flow and pressure in the braking system based on engine speed and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the engine is used to provide power to parasitic loads including hydraulic pumps, then the hydraulic system can be charged, but engine efficiency is reduced due to parasitic loads
Solution Approach 1:
The system dynamically adjusts the hydraulic pump operation based on real-time engine speed feedback. The controller monitors engine speed and selectively activates the pump only when engine speed exceeds a predetermined threshold, transforming the static parasitic load into a dynamic conditional load that adapts to engine operating conditions.
Solution Approach 2:
The system performs preliminary assessment of engine operating conditions before activating the hydraulic charging function. By evaluating engine speed against threshold criteria in advance, the system prevents premature pump activation that would consume excessive engine power during critical operating phases.
2Reliability
If the hydraulic pump operates continuously to charge the system, then braking capacity is maintained, but engine load increases especially in low temperature and high altitude conditions
Solution Approach 1:
The system implements a feedback control mechanism where the controller continuously monitors engine speed and uses this information to regulate hydraulic pump operation. This closed-loop control ensures the pump operates only when engine conditions permit, automatically adjusting hydraulic charging based on real-time engine performance data.
Solution Approach 2:
The system changes the operational parameters of the hydraulic pump based on engine speed conditions. By setting speed thresholds and adjusting pump activation criteria according to engine performance parameters, the system optimizes the balance between maintaining braking capacity and managing engine load under varying environmental conditions.
Data Source
AI summary
The disclosure describes, in one aspect, a control system for charging an electro-hydraulic charging system. The control system including at least one sensor operatively coupled to an engine for sensing at least one engine parameter indicative of an operating status of the engine and a controller adapted to charge the charging system when the operating status of the engine is determined to be stable.