Construction Machine Guidance Restriction During DPF Regeneration
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Solution Overview
Problem
Construction machines equipped with exhaust gas purifying devices face issues where the controller incorrectly identifies idling as an energy-wasting operation during the regeneration process of the Diesel Particulate Filter (DPF), leading to unnecessary guidance for improving fuel economy being displayed.
Innovation Solution
A guidance output device that includes a regeneration process determining unit and a guidance output restricting unit to prevent the display of fuel-saving guidance during the DPF regeneration process, ensuring that the machine's idling state is not misinterpreted as energy wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the controller displays guidance for improving fuel economy when the construction machine is in an energy-wasting operation, then fuel efficiency is improved, but unnecessary guidance is displayed during the regeneration process causing operator confusion
Solution Approach 1:
The controller detects the start of the regeneration process in advance and proactively restricts the display of fuel efficiency guidance before such guidance could be incorrectly shown. By monitoring the regeneration status and preemptively adjusting guidance display behavior, the system prevents the contradiction from occurring rather than reacting after the fact.
Solution Approach 2:
The system continuously monitors the regeneration process status and uses this feedback to dynamically control whether fuel efficiency guidance is displayed. When regeneration is detected, the feedback loop triggers a restriction on guidance display, and when regeneration completes, normal guidance resumes, creating a closed-loop control system that adapts to operational conditions.
2Loss of energy
If the controller monitors energy-wasting operations to provide fuel economy guidance, then energy consumption is reduced, but the regeneration process is incorrectly identified as energy-wasting operation
Solution Approach 1:
The controller separates the detection and evaluation of operational status into distinct functional components: one that monitors work equipment operation, another that detects regeneration process status, and a third that synthesizes this information to determine actual energy-wasting conditions. This segmentation allows the system to correctly identify that regeneration, while appearing idle, is a necessary maintenance process rather than true energy waste.
Solution Approach 2:
The system dynamically adjusts its definition of energy-wasting operation based on the current operational context. During regeneration, the controller modifies its detection criteria to exclude regeneration-related idle states from being classified as energy-wasting, while still maintaining strict monitoring for actual wasteful operations. This dynamic adaptation ensures measurement precision varies appropriately with operational mode.
Data Source
AI summary
A guidance output device, which outputs guidance for improving fuel economy when an energy wasting operation is detected in a construction machine that is provided with an exhaust gas purifying device for an internal combustion engine, includes a regeneration process determining unit that determines whether a regeneration process is in progress in the exhaust gas purifying device. It also includes a guidance output restriction unit that restricts an output of the guidance for energy saving by the guidance output unit when the regeneration process determining unit determines that the regeneration process is in progress in the exhaust gas purifying device.