[특허]Method for detecting cylinder air amount introduced into cylinder of internal combustion engine with exhaust gas recircu

Method for detecting cylinder air amount introduced into cylinder of internal combustion engine with exhaust gas recircu 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02D-041/18 F02M-025/07
출원번호	US-0865338 (1992-04-08)
우선권정보	JP-0077570 (1991-04-10)
발명자 / 주소	Takahashi Shinsuke (Yokohama JPX) Sekozawa Teruji (Kawasaki JPX) Shioya Makoto (Tokyo JPX)
출원인 / 주소	Hitachi, Ltd. (Tokyo JPX 03)
인용정보	피인용 횟수 : 54 인용 특허 : 0

초록 ▼

A method for controlling an internal combustion engine employing an exhaust gas recirculation system wherein a fuel injection amount is controlled corresponding to a calculated cylinder air mass flow rate and the method comprises the steps of: deriving a flow rate of a recirculated exhaust gas flowing into an induction passage of the engine; predicting a partial pressure of the exhaust gas within the induction passage on the basis of the flow rate of the recirculated exhaust gas; and deriving the cylinder air mass flow rate on the basis of the predicted value of the partial pressure of the recirculated exhaust gas. The method can also be applied to a system employing a parameter representative of fuel transfer characteristics derived by using measured values of parameters including an internal pressure in an induction passage of the engine, and the fuel injection amount is controlled depending upon the parameter representative of the fuel transfer characteristics, with the method comprising the steps of: deriving flow rates of the intake air and the recirculated exhaust gas introduced into the induction passage; predicting a total pressure in the induction passage on the basis of the intake air mass flow rate and the recirculated exhaust gas flow rae flowing in the induction passage; and deriving a parameter representative of fuel transfer characteristics in the induction passage on the basis of predetermined parameters including the total pressure.

대표청구항 ▼

In an electronic engine control system for an internal combustion engine, in which a cylinder air mass flow rate to be actually introduced into an engine cylinder is calculated using measured value of a parameter associated with engine operating condition, and a fuel injection amount is controlled corresponding to the calculated cylinder air mass flow rate, a method for calculating the cylinder air mass flow rate comprising the steps of: deriving a mass flow rate of a recirculated exhaust gas flowing into an induction passage of the engine, said engine having an exhaust gas recirculation system; estimating a partial pressure of the exhaust gas within said induction passage on the basis of said mass flow rate of the recirculated exhaust gas; and deriving said cylinder air mass flow rate on the basis of the estimated value of the partial pressure of the recirculated exhaust gas.

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Method for detecting cylinder air amount introduced into cylinder of internal combustion engine with exhaust gas recircu 원문보기

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