Exhaust gas purification system for internal combustion engine
US9162184B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2011 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Nov 23, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purification system includes a feedforward controller 47, a feedback controller 49 outputting a correcting variable for achieving a target temperature of DPF 7, and a variable adding unit 51 that adds the correcting variable output from the feedback controller 49 to a basic variable output from the feedforward controller 47 to compute a manipulated variable. The system further includes either one of an integrator resetter 55 that resets the integral value of an integrator that forms the feedback controller 49 when the amount of exhaust gas has suddenly dropped, and a basic variable calculating unit that calculates the basic variable to be output from the feedforward controller based on a signal representing the flow rate of exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.