Real-time, table-based estimation of diesel engine emissions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-019/00
G06F-011/30
출원번호
UP-0943826
(2007-11-21)
등록번호
US-7676318
(2010-04-21)
발명자
/ 주소
Allain, Marc Christian
출원인 / 주소
Detroit Diesel Corporation
대리인 / 주소
Panagos, Bill C.
인용정보
피인용 횟수 :
16인용 특허 :
17
초록▼
A real-time, on board, diesel engine emissions estimation with an empirical, table-based approach that accounts for up to eight (8) input parameters, for optimum emissions estimation under steady state or transient engine operation. The method considers a steady state NOx model, steady state Particu
A real-time, on board, diesel engine emissions estimation with an empirical, table-based approach that accounts for up to eight (8) input parameters, for optimum emissions estimation under steady state or transient engine operation. The method considers a steady state NOx model, steady state Particulate Matter model, transient NOx model and transient Particulate Matter models to populate a table in memory. The switch between steady state and transient models, real time emissions estimations is based on the rate of change of engine speed (RPM). If the rate of change of RPM exceeds a predetermined threshold, transient models for NOx and Particulate Matter are used to operate the engine and reduce emissions of NOx and Particulate Matter.
대표청구항▼
What is claimed as new and desired to be protected by Letters Patent of the United States is: 1. A method to operate an electronically controlled internal combustion engine equipped with an electronic control unit (ECU) having memory and tables resident therein to provide real time estimation of en
What is claimed as new and desired to be protected by Letters Patent of the United States is: 1. A method to operate an electronically controlled internal combustion engine equipped with an electronic control unit (ECU) having memory and tables resident therein to provide real time estimation of engine out emissions; said method comprising: determining a steady state NOx model for engine emissions based a combination of more than one two dimensional tables whose inputs are engine speed, engine load, fresh air flow rate, EGR flow rate, injection timing and injection pressure to populate tables in memory with values, summing outputs of said tables and saturating the outputs to populate tables in memory with values representative of steady state NOx emissions; determining a steady state particulate matter model for engine emissions based upon a combination of more than one two dimensional tables whose inputs are engine speed, engine load, fresh air flow rate, EGR flow rate, injection timing and injection pressure to populate tables in memory with values, summing outputs of said tables and saturating the outputs to populate tables in memory with values representative of steady state particulate matter emissions; determining a transient NOx model made of a combination of two dimensional tables whose inputs are engine speed, engine load, fresh air flow rate, EGR flow rate, injection timing, injection pressure, rate of change of engine speed and rate of change of engine load, summing outputs of said tables and saturating the outputs to populate tables in memory with values representative of steady state particulate matter emissions; determining a transient particulate matter model made of a combination of two dimensional tables whose inputs are engine speed, engine load, fresh air flow rate, EGR flow rate, injection timing, injection pressure, rate of change of engine speed and rate of change of engine load, summing outputs of said tables and saturating the outputs to populate tables in memory with values representative of steady state particulate matter emissions; and switching between steady state and transient models for real time estimation of engine emissions based upon a rate of change of engine speed. 2. The method of claim 1, wherein said steady state NOx model is made based upon a combination of three two dimensional tables. 3. The method of claim 1, wherein said steady state particulate models is made based upon a combination of three two dimensional tables. 4. The method of claim 1, wherein said transient state NOx model is made upon a combination of four two dimensional tables. 5. The method of claim 1, wherein said transient particulate matter model is made based upon a combination of four two dimensional tables. 6. The method claim 1, wherein when said engine switches operation from a steady state model to a transient state model when the engine speed rate of change exceeds 10 RPM per second. 7. The method of claim 1, further including generation said tables according to the formula: z=c1x2+c2y2+c3y2+c4y+c5x2y2+c6xy+c7x2y+c8xy2+c9 wherein: z is the table output; z=a*c a is the following vector: a=[x2 x y2 y x2y2 xy x2y xy2 1] c=[a′*a]−1*a′*z x is the tablets first input (row input) y is the table's second input (column input) c1, c2, c3, c4, c5, c6, c7, c8, and c9 are the coefficients of the polynomial. 8. The method of claim 1, wherein said engine speed is determined from crankshaft magnetic pick-up sensors. 9. The method of claim 1, wherein fresh air flow rate is determined from at least one of a percentage of EGR as measured by a venture across a differential pressure sensor or hot film mass flow sensor, or as an estimation using mass balance across an engine intake and exhaust system. 10. The method of claim 1, wherein said change of engine load is determined by a change in fueling rate of the engine.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (17)
Patchett,Joseph A.; Verbeek,Rudolfus Petrus; Grimston,Karl Richard; Rice,Gary Wayne; Calabrese,John Lawrence; Van Genderen,Mathus, Control system for mobile NOx SCR applications.
Kakwani, Ramesh M.; Voss, Kenneth C.; Patchett, Joseph A.; Grimston, Karl R., Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines.
Kakwani,Ramesh M.; Voss,Kenneth C.; Patchett,Joseph A.; Grimston,Karl R., Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines.
Buchhop Thomas Robert (Canton MI) D\Alleva Randall (St. Clair Shores MI) Darnell Ronald Keith (Ortonville MI) Little Jack Ryan (Metamora MI) Pedersen Curtis Thomas (Fenton MI), Parametric emissions monitoring system having operating condition deviation feedback.
Kim, Charlie Chang-Won; Suder, Timothy Andrew; Trevitz, Steven Stuart; Zsoldos, Jeffrey Scott, Turbo-charged internal combustion engine with in-cylinder EGR and injection rate shaping.
Kim, Charlie Chang-Won; Suder, Timothy Andrew; Trevitz, Steven Stuart; Zsoldos, Jeffrey Scott, Turbo-charged internal combustion engine with in-cylinder EGR and injection rate shaping.
Stewart,Gregory E.; Kolavennu,Soumitri N.; Borrelli,Francesco; Hampson,Gregory J.; Shahed,Syed M.; Samad,Tariq; Rhodes,Michael L., Use of sensors in a state observer for a diesel engine.
Petrovic, Simon; Yacoub, Yasser Mohamed sayed, Method for monitoring a regulated emission concentration in the exhaust gas of an internal combustion engine.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.