Backhoe DPF Regeneration via Automatic Engine Speed Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing diesel particulate filter (DPF) regeneration techniques face challenges in achieving sufficient temperature for regeneration, leading to incomplete regeneration and increased fuel consumption, and require engine stoppage for regeneration, limiting the convenience and efficiency of working machines.
Innovation Solution
A working machine equipped with a diesel engine and an exhaust gas cleaning device that includes a filter regeneration system capable of automatically increasing engine speed during regeneration, allowing for efficient combustion of particulate matter without stopping the engine, and includes modes to manage particulate matter deposition based on temperature and deposition amount thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the engine load is increased to increase the exhaust gas temperature for DPF regeneration, then the regeneration efficiency is improved, but the fuel consumption increases
Solution Approach 1:
The system performs preliminary detection of DPF clogging status using a differential pressure sensor before regeneration is needed. When clogging is detected, the system automatically controls the engine speed to increase exhaust temperature for regeneration, preventing the need for high-load interventions later and optimizing fuel efficiency.
Solution Approach 2:
The system continuously monitors the differential pressure across the DPF and uses this feedback to automatically adjust engine speed during regeneration. The ECU controls engine speed to maintain optimal exhaust temperature for combustion of particulate matter, avoiding excessive fuel consumption while ensuring complete regeneration.
2Reliability
If the engine is stopped for DPF regeneration, then the regeneration process can be performed safely, but the working machine cannot continue operation
Solution Approach 1:
The system enables self-service regeneration by automatically detecting DPF clogging through differential pressure sensing and autonomously controlling engine speed to perform regeneration. This eliminates the need for operator intervention or engine stoppage, allowing continuous operation while maintaining DPF functionality and maximizing productivity.
3Productivity
If the engine speed is increased during automatic regeneration, then the combustion of particulate matter is promoted, but the exhaust gas temperature control becomes more difficult
Solution Approach 1:
The ECU uses feedback from exhaust temperature sensors and differential pressure sensors to automatically adjust engine speed during regeneration. This closed-loop control promotes efficient combustion of particulate matter while maintaining precise exhaust temperature control, avoiding the need for complex manual intervention or additional control systems.
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
Enables efficient and complete regeneration of the DPF during operation, reducing fuel consumption and extending the working time of machines by promoting combustion of particulate matter and managing deposition effectively.
Implementation Method 1
a filter regeneration means to combust and remove the particulate matter deposited in the filter
Implementation Method 2
combust and remove the particulate matter
Data Source
AI summary
In a backhoe comprising: a diesel engine able to increase a speed due to an accelerating operation; an exhaust gas cleaning device having a DPF for catching a particulate matter included in an exhaust gas exhausted from the diesel engine; and a filter regeneration means to combust and remove the particulate matter deposited in the DPF of the exhaust gas cleaning device, the filter regeneration means requires to increase the speed of the diesel engine during an automatic regeneration for automatically combusting and removing the particulate matter deposited in the DPF. In this manner, a working machine able to require an operator to increase the speed of the diesel engine at appropriate timing, in order to increase a temperature of the exhaust gas to a temperature required for regeneration of the DPF can be provided.