Diesel Engine Control Mode Switching for DPF Regeneration
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Solution Overview
Problem
Existing diesel engine control systems face challenges in balancing fuel consumption and noise levels, leading to sudden changes in engine noise and output characteristics during automatic switching between continuous and forced regeneration modes, which can be misinterpreted by operators as abnormalities.
Innovation Solution
A diesel engine with an electronic controller that allows operators to select between low fuel consumption and low noise modes, and manually choose between continuous and forced regeneration modes, with automatic mode switching based on engine output and particulate filter conditions, and visual notification of selected modes to prevent misunderstandings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic switching between continuous regeneration mode and forced regeneration mode is implemented, then the diesel particulate filter can be regenerated efficiently under different driving conditions, but sudden changes in engine noise and output characteristics occur that can be misinterpreted by operators as abnormalities
Solution Approach 1:
The system provides visual feedback through a display device that shows the current operating mode (continuous regeneration or forced regeneration) and the selected control pattern (low fuel consumption or low noise). This feedback mechanism allows operators to understand the reasons for sudden changes in engine behavior, preventing misinterpretation of normal regeneration processes as abnormalities.
Solution Approach 2:
The control device acts as an intermediary between the automatic regeneration control system and the operator. It translates the complex automatic mode switching into comprehensible visual information, mediating the communication gap and helping operators understand the system's behavior during regeneration processes.
2Use of energy by moving object
If control for reducing fuel consumption is implemented, then fuel economical efficiency is improved, but noise of the diesel engine increases
Solution Approach 1:
The system dynamically switches between low fuel consumption mode and low noise mode based on operator selection and operating conditions. This dynamic control allows the engine to optimize between fuel efficiency and noise levels, adapting to different operational requirements rather than being fixed in one control strategy.
Solution Approach 2:
The control device changes operational parameters (fuel injection timing, air-fuel ratio, EGR rate) differently depending on the selected mode. In low fuel consumption mode, parameters are optimized for efficiency, while in low noise mode, parameters are adjusted to reduce noise, allowing the system to achieve different performance priorities through parameter variation.
3Object-generated harmful factors
If control for reducing noise is implemented, then silence of the diesel engine is improved, but fuel consumption amount increases
Solution Approach 1:
The system enables dynamic switching between control patterns, allowing operators to select low noise mode when silence is prioritized and low fuel consumption mode when efficiency is prioritized. This dynamic adaptability resolves the contradiction by allowing the system to achieve different performance goals based on operational context.
Solution Approach 2:
Different control parameters are adjusted based on the selected mode. When low noise mode is selected, parameters such as fuel injection timing and combustion chamber pressure are modified to reduce noise, accepting increased fuel consumption as a trade-off. The system manages this parameter trade-off systematically based on operator preferences.
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 operators to improve economic efficiency and silence by selecting appropriate modes, prevents sudden changes in engine noise and output characteristics, and allows manual termination of forced regeneration to avoid operator confusion.
Implementation Method 1
a diesel particulate filter which collects and oxidizes particle matters included in exhaust gas of a diesel engine
Implementation Method 2
an electronic controller preparing a control signal following with a selected mode so as to control the diesel engine
Data Source
AI summary
A diesel engine is configured to be optionally set either to a low fuel consumption mode in which the amount of fuel consumption is reduced or to a low noise mode in which the noise is reduced so that a continuous regeneration mode is automatically selected when the output value of the diesel engine is greater than a predetermined value (Ptr), the estimated amount of accumulation of particulate matter collected in a DPF is greater than or equal to a predetermined value (Vtr), a forced regeneration mode is automatically selected when the output value of the diesel engine is less than the predetermined value (Ptr) and the estimated amount of accumulation of particulate matter collected in the DPF is greater than the predetermined value (Vtr) when either the continuous regeneration mode or forced regeneration mode is manually selected, control is started depending on the selected mode.