{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9605578","patent":{"patent_number":"US-9605578","title":"Particulate matter sensing device for controlling and diagnosing diesel particulate filter systems","assignee":null,"inventors":[],"filing_date":"2015-12-02T00:00:00.000Z","publication_date":"2017-03-28T00:00:00.000Z","cpc_codes":["G01N","G01N"],"num_claims":20,"abstract":"A PM sensing device including a front sensing piece receiving an exhaust flow, a back sensing piece posited downstream from the front sensing piece, and a sensor controller electrically connected to the sensing pieces for measuring their impedances and calculate a PM sensing value accordingly. The PM sensing device has two operating modes: an impedance measurement mode, in which a PM sensing value is calculated, and a regeneration mode, in which accumulated PM is removed. Since PM is only deposited in the front sensing piece, by comparing impedances of the front and the back sensing pieces, PM sensing values can be obtained insensitive to particle size, exhaust gas temperature, and exhaust gas species. When the PM sensor is positioned in a DPF system, sensor regeneration times in a predetermined period of time after a DPF regeneration completes can be used for triggering a new DPF regeneration and detecting DPF failures."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Particulate matter sensing device for controlling and diagnosing diesel particulate filter systems","description":"A PM sensing device including a front sensing piece receiving an exhaust flow, a back sensing piece posited downstream from the front sensing piece, and a sensor controller electrically connected to t","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9605578","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-9605578","citation_suggestion":"Patentable. \"Particulate matter sensing device for controlling and diagnosing diesel particulate filter systems\" (US-9605578). https://patentable.app/patents/US-9605578","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9605578","json":"https://patentable.app/api/llm-context/US-9605578","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:41:25.145Z"}