Active Regeneration Control for Diesel Particulate Filter

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Solution Overview

Problem

Current DPF control systems for commercial equipment lack the ability to objectively optimize active regeneration timing, leading to inefficient and potentially damaging regeneration processes due to driver-dependent timing, which can result in frequent or rare regeneration attempts, affecting DPF durability and engine safety.

Innovation Solution

An active regeneration control device with a determining unit that uses ash learning, soot amount, in-DPF soot distribution, and regeneration frequency data to objectively decide when to initiate active regeneration, accompanied by a signal generation unit to notify the driver and an inducing unit to ensure timely regeneration, reducing the risk of abnormal regeneration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If active regeneration timing is determined by driver preference, then the system is simple to operate, but regeneration efficiency deteriorates and DPF durability is compromised

Engineering Contradiction:

Improvedriver operation simplicityVSAvoidDPF durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system implements feedback by continuously monitoring DPF soot accumulation levels and providing information to the driver about optimal regeneration timing. The control device receives signals from the DPF soot sensor, determines whether active regeneration should be performed, and notifies the driver through the output device, creating a closed-loop system that guides driver behavior based on actual DPF conditions.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system enables self-service by allowing the driver to initiate active regeneration independently when the system indicates it is appropriate. The driver can operate the manual switch to start regeneration without requiring complex system intervention, while the control device provides the necessary guidance based on monitored parameters.

Inventive Principle:

Principle #25Self-service

2Reliability

If active regeneration is performed too frequently, then DPF cleanliness is maintained, but engine burden increases and fuel efficiency decreases

Engineering Contradiction:

ImproveDPF cleanlinessVSAvoidfuel consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary action by monitoring DPF soot accumulation continuously and determining the optimal timing for active regeneration before excessive soot buildup occurs. The control device calculates whether active regeneration should be performed based on current soot levels, preventing both over-regeneration and under-regeneration scenarios.

Inventive Principle:

Principle #10Preliminary action

3Use of energy by moving object

If active regeneration is delayed, then fuel efficiency is improved, but abnormal regeneration risk increases and engine safety is compromised

Engineering Contradiction:

Improvefuel efficiencyVSAvoidabnormal regeneration risk

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

4Ease of operation

If manual switch active regeneration is implemented, then driver control is improved, but objective optimization of regeneration timing is lost

Engineering Contradiction:

Improvedriver controlVSAvoidregeneration timing accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP2796681B1Active regeneration control device for a diesel particulate filter

Publication Date: 2017.02.15 DOOSAN INFRACORE CO LTD

AI summary

An active regeneration control device for a diesel particulate filter (DPF) according to the present invention includes: an active regeneration determining unit judging an active regeneration time of the (DPF); an active regeneration signal generating unit generating an active regeneration signal according to the decision of the active regeneration determining unit; and an active regeneration inducing unit. The active regeneration inducing unit induces the active regeneration when the active regeneration is not performed after the active regeneration signal is generated.