Method for monitoring an SCR system
US9606023B2 · kind B2 · utility
1Cited by
8References
11Claims
0Family size
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Key dates
| Filing date | Jun 22, 2011 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Feb 17, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for detecting whether an injector with a valve controlled by a PWM signal of an SCR system is at least partially clogged, the system including a pump, or a positive-displacement pump, driven by a motor and pressure of which is controlled by a controller that continuously measures the pressure and/or another parameter characteristic of energy transmitted by the motor to the pump. According to the method, during normal operation of the SCR system, specific portions of one of the measurements are compared with equivalent portions stored in a memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.