Mobile Work Machine Power Optimization Through Traction Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mobile work machines with single power plants often face overload conditions, leading to reduced power to traction systems or work attachments, increasing cost and complexity in existing control systems.
Innovation Solution
A mobile work machine with a traction system and work attachment, equipped with a power reduction device and electronic controller that dynamically adjusts hydraulic fluid pressure to the traction control device, optimizing power distribution without actual traction speed feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single power plant powers multiple work functions (traction system and work attachment), then the work machine can perform multiple operations, but the total load may exceed the power plant capacity requiring power reduction
Solution Approach 1:
The system dynamically adjusts power distribution to the traction system based on real-time conditions. The electronic controller monitors engine operating parameters and work attachment power demands, continuously varying the power available to the traction system through the hydraulic pump and control valve assembly to prevent engine overload while maintaining multiple work functions.
Solution Approach 2:
The invention changes the power distribution parameter by adjusting the hydraulic fluid pressure and flow rate to the traction control device. The power reduction device (control valve assembly) varies the hydraulic parameters to control the traction system's power consumption, allowing the single power plant to safely support multiple work functions without exceeding its capacity.
2Power
If control systems allocate power between traction system and work attachment, then power distribution is optimized, but system cost and complexity increase
Solution Approach 1:
The electronic controller performs multiple functions using a single integrated system. It monitors both the work attachment's power demand and the engine's operating conditions, automatically allocates power between the traction system and work attachment, and prevents engine overload. This multi-functional approach optimizes power distribution without requiring separate complex control systems for each function.
Solution Approach 2:
The system automatically monitors its own operating conditions and self-regulates power distribution. The electronic controller continuously monitors engine parameters and work attachment power demands, making real-time decisions about power allocation without external intervention. This self-service capability simplifies the overall control architecture while maintaining optimized power distribution.
3Reliability
If the power reduction device reduces hydraulic fluid pressure to the traction control device, then available power to the traction system is reduced, but engine stalling is minimized
Solution Approach 1:
The system dynamically adjusts the power reduction device's position based on real-time monitoring of engine operating parameters and work attachment power demands. The electronic controller continuously varies the hydraulic fluid pressure to the traction control device, creating a dynamic balance between preventing engine stalling and maintaining adequate traction system performance for the current work conditions.
Solution Approach 2:
The electronic controller monitors engine operating parameters and work attachment power demands in real-time, using this feedback to automatically adjust the power reduction device. The system continuously receives feedback about the engine's load conditions and the work attachment's power consumption, then adjusts the traction system's power supply accordingly to prevent stalling while maintaining operational reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Minimizes engine stalling and maximizes work output by efficiently distributing power across multiple work scenarios, reducing system complexity and cost.
Implementation Method 1
a hydraulic pump driven by the prime mover
Implementation Method 2
a hydraulic motor for driving the ground engagement assembly, the hydraulic motor being powered by the hydraulic pump
Implementation Method 3
a power reduction device for controlling a hydraulic fluid flow to the traction control device
Data Source
AI summary
A mobile work machine is provided with a prime mover supported by a chassis, a first hydraulic pump driven by the prime mover, a work attachment powered by the prime mover, and a traction system. The traction system can include a ground engagement assembly for propelling the chassis. The mobile work machine can include an electronic controller configured to execute a traction speed control algorithm in which the position of the power reduction device is operated by the electronic controller to reduce available fluid pressure to a traction control device without receiving an actual traction speed feedback signal at the electronic controller. Alternatively, or in addition, a commanded position of the power reduction control device can be calculated by the electronic controller as a function of a requested prime mover operating speed demand reduced by a calculated adjustment factor.