Aftertreatment system for work vehicle engine system and engine system using same
US12338759B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 2024 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Feb 20, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control system for a work vehicle engine system with an engine from which exhaust gas flows, at least in part, to an aftertreatment selective catalytic reduction (SCR) catalyst includes a temperature sensor providing an indication of a catalyst temperature associated with the SCR catalyst and a controller having processing and memory architecture. The controller is configured to receive a control signal from the temperature sensor indicative of the catalyst temperature and execute instructions according to the control signal to activate a conversion of exhaust gas by the SCR catalyst by operating the engine system in a first mode that drives the SCR catalyst temperature to a first temperature threshold. After first temperature threshold is reached, the controller is configured to execute instructions to reduce power to the SCR catalyst by operating the engine system in a second mode in which the conversion of the exhaust gas by the SCR catalyst is sustained by hysteresis within a temperature band between the first temperature threshold and a second temperature threshold that is less than the first temperature threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.