[특허]State estimator based exhaust gas chemistry measurement system and method

State estimator based exhaust gas chemistry measurement system and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-027/62
출원번호	US-0111233 (1993-08-24)
발명자 / 주소	Bush Kevin J. (Northville MI) Dua Sanjay (Troy MI) Adams Neil J. (Novi MI) Markyvech Craig R. (Romulus MI)
출원인 / 주소	Motorola, Inc. (Schaumburg IL 02)
인용정보	피인용 횟수 : 46 인용 특허 : 0

초록 ▼

A system, and a corresponding method, for measuring a chemical concentration of a gas exhausted from exhaust ports (409, 413) of a multi-cylinder internal combustion engine (401) includes a gas sensing device. This device (419) is preferably a UEGO (Universal Exhaust Gas Oxygen) sensor. The gas exhausted is present in a substantially stable chemical concentration (706, 718) at a collection point (420) during intervals (738, 742) of engine angular rotation corresponding to the exhaust cycles. The UEGO sensor (419) measures the gas exhausted from the exhaust ports (409, 413) and provides a sensory output signal (743) that, during the intervals (738, 742) of engine angular rotation corresponding to each of the exhaust cycles, approaches (737, 741) a substantially stable value representative of the chemical concentration of the gas (706, 718) exhausted during the associated exhaust cycle. The sensory output signal (743) is coupled to an engine control system (431) that is executing signal reconstruction method steps (500, 600). These signal reconstruction steps (500, 600) are preferably based on a Kalman-Bucy state estimator in which a constituent gas signal Poe (745) that has a substantially constant amplitude during the intervals (738, 742), is reconstructed by the Kalman-Bucy state estimation reconstruction process (500, 600). The described improved method, and system, can compensate for the static and dynamic temporal and spacial effects, characteristic of the multi-cylinder engine exhaust system and the difference in sensory response to rich and lean exhaust gases, of the UEGO (419) sensor.

대표청구항 ▼

A system for measuring a chemical concentration of a gas exhausted during exhaust cycles from a plurality of exhaust ports of a multi-cylinder internal combustion engine, said system comprising: a gas chemistry sensor, responsively coupled to the collection point, for measuring the gas exhausted from each of the plurality of exhaust ports and for providing a sensory output signal dependent thereon; and a state estimator, comprising state estimation coefficients associated with an engineering model of said gas chemistry sensor, the state estimator responsively coupled to the sensory output signal provided by said gas chemistry sensor, wherein said state estimator provides a constituent gas signal in response to the sensory output signal.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

State estimator based exhaust gas chemistry measurement system and method 원문보기

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State estimator based exhaust gas chemistry measurement system and method 원문보기

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