DPF accumulation amount estimating apparatus
US8286420B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2009 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | May 22, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A DPF accumulation amount estimating apparatus uses an integrated PM accumulation amount estimation logic which combines the difference between an engine PM emission amount and a PM regeneration amount and a DPF differential pressure model, thereby achieving minimized influences of changes in an exhaust gas flow rate and the like with resultant improved estimation accuracy. The DPF accumulation amount estimating apparatus for estimating the accumulation amount in a DPF (diesel particulate filter) provided therewith for removing PM (particulates (particulate matters)) in an exhaust gas, and includes a PM emission amount model in which a PM emission amount is set on the basis of the operating condition of an engine, a PM regeneration amount model in which a PM regeneration amount is set on the basis of the temperature difference between an outlet temperature and an inlet temperature of the DPF, and a DPF differential pressure model in which a PM accumulation amount is set on the basis of the differential pressure between an exhaust gas flow rate and the DPF, wherein the estimated PM accumulation amount of the DPF is calculated by adding a corrected PM accumulation amount obtained by …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.