A method and system for avoiding frequent regeneration of a particulate filter
By calculating the pressure difference deviation after engine regeneration and adjusting the regeneration limit using the ash correction map, the problem of frequent regeneration of the particulate matter filter due to carbon deposits was solved, achieving stable regeneration and reduced fuel consumption.
CN117028008BActive Publication Date: 2026-05-26WEICHAI POWER CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WEICHAI POWER CO LTD
- Filing Date
- 2023-07-17
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Engine particulate filters require frequent regeneration due to carbon buildup during use, which affects the user's driving experience and increases fuel consumption.
Method used
By obtaining the steady-state pressure difference value and the basic pressure difference value after engine regeneration, the deviation percentage is calculated, and the correction coefficient is obtained using the ash correction map. The regeneration limit is then adjusted to avoid frequent regeneration caused by ash and reduce fuel consumption.
Benefits of technology
It effectively avoids shortened regeneration time and frequent regeneration caused by ash content, improves the user's driving experience and reduces fuel consumption.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117028008B_ABST
Abstract
This invention proposes a method and system for avoiding frequent regeneration of particulate matter filters (DPFs), relating to the field of emission control technology. The method includes: Step 1: Obtaining the steady-state differential pressure value after engine regeneration, along with the baseline differential pressure and the standard differential pressure value under the current carbon load; Step 2: Calculating the deviation of the steady-state differential pressure value from the standard differential pressure value and the percentage deviation from the baseline differential pressure; Step 3: Based on the percentage deviation and air velocity, consulting the ash correction map to obtain the current correction coefficient; Step 4: Determining whether the current correction coefficient is less than a preset value. If so, the product of the current correction coefficient and the current carbon load trigger limit is used as the carbon load trigger limit for the next regeneration; otherwise, service regeneration is performed, and the carbon load trigger limit is reset to its initial value after service regeneration. This invention utilizes the deviation between the no-load DPF differential pressure and the differential pressure after regeneration to correct the regeneration limit, ensuring that regeneration only occurs when carbon deposits reach a certain level, avoiding shortened regeneration time or even frequent regeneration due to ash content, thus reducing fuel consumption.
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