Vehicle-Mounted Crane Oil Supply Control for Energy Efficiency
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Solution Overview
Problem
Existing pressurized-oil supply amount control devices for vehicle-mounted cranes with dual pump systems often increase engine rotation speed unnecessarily, leading to excessive energy consumption and noise, particularly when different vehicle engines are used, as the relationship between engine speed and flow rate control is fixed, failing to optimize energy saving and noise reduction.
Innovation Solution
A pressurized-oil supply amount control device with a controller that individually controls engine rotation speed and flow rate based on operation inputs, allowing selectable relationships between operation signals and engine rotation speed, enabling optimal control according to vehicle engine characteristics, and using a stack type control valve configuration to save space and facilitate assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine rotation speed is increased to ensure sufficient torque for dual pump operation, then the rotating torque insufficiency is prevented, but energy consumption and noise increase
Solution Approach 1:
The patent implements dynamic control of engine rotation speed based on operational requirements. The controller adjusts the engine speed within a predetermined range rather than maintaining a fixed high speed, allowing the system to adapt to varying load conditions. This dynamic adjustment ensures sufficient torque for dual pump operation when needed while reducing energy consumption and noise during lower-demand operations.
Solution Approach 2:
The system changes the operating parameters of the engine by controlling rotation speed within a predetermined range rather than at a fixed value. This parameter variation allows optimization of the balance between torque availability and energy efficiency, enabling the engine to operate at lower speeds when full torque is not required, thereby reducing energy consumption and noise while maintaining reliability.
2Device complexity
If the relationship between engine speed and flow rate control is fixed, then the control system is simple, but it cannot optimize energy saving and noise reduction for different vehicle engines
Solution Approach 1:
The control system dynamically adjusts the relationship between engine speed and flow rate based on operational conditions rather than maintaining a fixed relationship. The controller individually controls both parameters within predetermined ranges, allowing adaptation to different vehicle engine characteristics and optimizing energy efficiency without requiring excessive system complexity.
Solution Approach 2:
The control system segments the control of engine speed and flow rate into independently adjustable parameters. By controlling these parameters separately within predetermined ranges rather than as a fixed coupled system, the patent enables optimization for different engine types while maintaining manageable system complexity through structured control architecture.
3Use of energy by moving object
If the sub hydraulic pump is operated at low engine rotation speed, then energy consumption is reduced, but the rotating torque becomes insufficient
Solution Approach 1:
The system dynamically balances engine rotation speed with torque requirements by controlling both parameters within predetermined ranges. When the sub hydraulic pump operates, the controller adjusts the engine speed to maintain sufficient torque while minimizing energy consumption, rather than operating at fixed high or low speeds.
Solution Approach 2:
The control system uses feedback mechanisms to monitor operational conditions and adjust engine rotation speed accordingly. The controller receives input about the operational state and modifies the engine speed within the predetermined range to ensure torque sufficiency is maintained while optimizing energy consumption, creating a self-regulating system.
Data Source
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AI summary
The present invention provides a pressurized-oil supply amount control device for a vehicle-mounted crane which has a dual pump system and which is capable of further inhibiting possible noise from an engine and improving fuel consumption. A predetermined control function is set for a controller 2 for the pressurized-oil supply amount control device. Three regions R1, R2, R3 are set for the predetermined control function according to the rate of an operation signal input. Based on the predetermined control function, the rotation speed of the engine 6 is controlled, and the flow rate of pressurized oil is controlled by a flow rate control valve 5. This increases the total flow rate G of pressurized oil supplied to a control valve 3 in proportion to the rate of the operation signal input to the crane.