[특허]Method of determining emission control system operability

Method of determining emission control system operability 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01N-003/00
출원번호	US-0961942 (2001-09-25)
발명자 / 주소	Bidner,David Karl Sumilla,Gopichandra
출원인 / 주소	Ford Global Technologies, LLC
대리인 / 주소	Alleman Hall McCoy Russell &
인용정보	피인용 횟수 : 7 인용 특허 : 110

초록 ▼

An engine diagnostic system for use with an internal combustion engine coupled to a lean NOx trap with a sensor coupled downstream of the trap. The sensor provides two output signals, one indicative of an air-fuel ratio and the second indicative of a NOx concentration. Construction of the sensor insists that proper indication of NOx concentration is dependent upon proper operation of the first output signal. Degradation of the NOx concentration signal is determined when the first output signal has degraded.

대표청구항 ▼

We claim: 1. An emission control system of a vehicle having an internal combustion engine, wherein a fuel injection amount is injected into a cylinder of said engine, comprising: a sensor coupled downstream of said engine, said sensor providing first and second output signals indicative of first and second exhaust gas constituents, respectively, communicating with said sensor; a controller receiving said first and second output signals, said controller configured to determine a degradation of said second output signal based on said first output signal, said controller being further configured to adjust said fuel injection amount based on said first output signal indicative of said first exhaust gas constituent, said first exhaust gas constituent being oxygen; and an electronically controlled throttle communicating with an intake manifold of said engine, said controller generating a control signal to adjust a position of said throttle. 2. The system recited in claim 1 further comprising a mass air flow sensor disposed in an intake manifold of said engine generating a mass air flow signal communicating with said controller. 3. The system recited in claim 2 further comprising a manifold pressure sensor disposed in an intake manifold of said engine generating a manifold pressure signal communicating with said controller. 4. The system recited in claim 2 wherein said second exhaust gas constituent includes NOx. 5. An emission control system of a vehicle having an internal combustion engine, wherein a fuel injection amount is injected into a cylinder of said engine, comprising: a sensor coupled downstream of said engine, said sensor providing first and second output signals indicative of first and second exhaust gas constituents, respectively, communicating with said sensor; a controller receiving said first and second output signals, said controller configured to determine degradation of said second output signals based on said first output signal, said controller being further configured to adjust said fuel injection amount based on an error between said first output signal and a desired level of said first signal; and an electronically controlled throttle plate communicating with an intake manifold of said engine, said controller generating a control signal to adjust a position of said throttle plate. 6. The system of claim 5 wherein said controller is configured to determine degradation of said second output signal by comparing said second output signal to an estimate of said second output, said estimate based on said first output signal. 7. The system of claim 6 wherein said estimate is further based on an operating condition.

이 특허에 인용된 특허 (110)

Cullen Michael John ; Hieb Bradley John ; Davey Christopher K., Adaptive exhaust temperature estimation and control.
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Uchida Masaaki (Yokosuka JPX) Kai Shisei (Yokosuka JPX), Air-fuel ratio control system.
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Ito Hiroshi (Wako JPX) Hatcho Seiji (Wako JPX) Kaneko Tetsuya (Wako JPX) Iwata Yoichi (Wako JPX) Teshirogi Tetsu (Wako JPX), Air-fuel ratio control system for internal combustion engines.
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Koga Kazuo (Okazaki JPX) Okada Kojiro (Nagoya JPX) Danno Yoshiaki (Kyoto JPX) Togai Kazuhide (Takatsuki JPX) Hirako Osamu (Okazaki JPX) Ohmori Shogo (Okazaki JPX) Sanbayashi Daisuke (Toyota JPX) Koda, Apparatus and method for internal combustion engine control.
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Abthoff Jrg (Pluederhausen DEX) Schuster Hans-Dieter (Schorndorf DEX) Wollenhaupt Gottfried (Stuttgart DEX) Loose Gunter (Remseck DEX) Busch Michael-Rainer (Ebersbach DEX), Method and apparatus for monitoring and adjusting l 상세보기

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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)
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Method of determining emission control system operability 원문보기

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Method of determining emission control system operability 원문보기

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