{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9709543","patent":{"patent_number":"US-9709543","title":"Method and apparatus for determining NOx content in an exhaust gas feedstream of an internal combustion engine","assignee":null,"inventors":[],"filing_date":"2015-05-06T00:00:00.000Z","publication_date":"2017-07-18T00:00:00.000Z","cpc_codes":["G01N"],"num_claims":18,"abstract":"An internal combustion engine is described in conjunction with a method for dynamically determining a mass flow rate of nitrogen oxides (NOx) for its exhaust gas feedstream. The method includes determining a present engine operating point and determining a reference NOx content for a reference engine operating point. A combustion chemical reaction rate is determined based upon the present engine operating point and the reference engine operating point. A NOx content in the exhaust gas feedstream is dynamically determined during operation of the internal combustion engine based upon the reference NOx content, the combustion chemical reaction rate and a combustion mixing rate constant."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for determining NOx content in an exhaust gas feedstream of an internal combustion engine","description":"An internal combustion engine is described in conjunction with a method for dynamically determining a mass flow rate of nitrogen oxides (NOx) for its exhaust gas feedstream. The method includes determ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9709543","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9709543","citation_suggestion":"Patentable. \"Method and apparatus for determining NOx content in an exhaust gas feedstream of an internal combustion engine\" (US-9709543). https://patentable.app/patents/US-9709543","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9709543","json":"https://patentable.app/api/llm-context/US-9709543","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:19:47.601Z"}