{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9665996","patent":{"patent_number":"US-9665996","title":"Negative pressure abnormality detection apparatus and control apparatus for internal combustion engine","assignee":null,"inventors":[],"filing_date":"2015-12-10T00:00:00.000Z","publication_date":"2017-05-30T00:00:00.000Z","cpc_codes":["G07C"],"num_claims":12,"abstract":"A negative pressure detection part detects a negative pressure from a signal of a negative pressure sensor detecting a negative pressure generated due to rotation of an internal combustion engine. The negative pressure is used to assist a vehicle driver's braking operation. An abnormality determination part determines, during continuation of the internal combustion engine stopped state, that the negative pressure sensor is in an abnormal condition if the detected negative pressure is out of a normal range near an atmospheric pressure to a vacuum pressure side when an operation of decreasing the negative pressure is performed on a brake pedal greater than or equal to a predetermined number of times or greater than or equal to a predetermined period of time or when a total operation amount of the decreasing operation is greater than or equal to a predetermined amount."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Negative pressure abnormality detection apparatus and control apparatus for internal combustion engine","description":"A negative pressure detection part detects a negative pressure from a signal of a negative pressure sensor detecting a negative pressure generated due to rotation of an internal combustion engine. The","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9665996","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-9665996","citation_suggestion":"Patentable. \"Negative pressure abnormality detection apparatus and control apparatus for internal combustion engine\" (US-9665996). https://patentable.app/patents/US-9665996","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9665996","json":"https://patentable.app/api/llm-context/US-9665996","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:00:11.296Z"}