TY - JOUR
T1 - Estimation and feedback control of air-fuel ratio for gasoline engines
AU - Kumar, Madan
AU - Shen, Tielong
N1 - Publisher Copyright:
© 2015, South China University of Technology, Academy of Mathematics and Systems Science, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg.
PY - 2015/5/22
Y1 - 2015/5/22
N2 - In 4-stroke internal combustion engines, air-fuel ratio control is a challenging task due to the rapid changes of engine throttle, especially during transient operation. To improve the transient performance, managing the cycle-to-cycle transient behavior of the mass of the air, the fuel and the burnt gas is a key issue due to the imbalance of cyclic combustion process. This paper address the model-based estimation and control problem for cyclic air-fuel ratio of spark-ignition engines. A discrete-time model of air-fuel ratio is proposed, which represents the cycle-to-cycle transient behavior of in-cylinder state variables under the assumptions of cyclic measurability of the total in-cylinder charge mass, combustion efficiency and the residual gas fraction. With the model, a Kalman filter-based air-fuel ratio estimation algorithm is proposed that enable us to perform a feedback control of air-fuel ratio without using lambda sensor. Finally, experimental validation result is demonstrated to show the effectiveness of proposed estimation and control scheme that is conducted on a full-scaled gasoline engine test bench.
AB - In 4-stroke internal combustion engines, air-fuel ratio control is a challenging task due to the rapid changes of engine throttle, especially during transient operation. To improve the transient performance, managing the cycle-to-cycle transient behavior of the mass of the air, the fuel and the burnt gas is a key issue due to the imbalance of cyclic combustion process. This paper address the model-based estimation and control problem for cyclic air-fuel ratio of spark-ignition engines. A discrete-time model of air-fuel ratio is proposed, which represents the cycle-to-cycle transient behavior of in-cylinder state variables under the assumptions of cyclic measurability of the total in-cylinder charge mass, combustion efficiency and the residual gas fraction. With the model, a Kalman filter-based air-fuel ratio estimation algorithm is proposed that enable us to perform a feedback control of air-fuel ratio without using lambda sensor. Finally, experimental validation result is demonstrated to show the effectiveness of proposed estimation and control scheme that is conducted on a full-scaled gasoline engine test bench.
KW - AFR estimation using Kalman filter
KW - Discrete-time model
KW - PI controller
KW - combustion efficiency
KW - in-cylinder charge
UR - http://www.scopus.com/inward/record.url?scp=84935006929&partnerID=8YFLogxK
U2 - 10.1007/s11768-015-4148-9
DO - 10.1007/s11768-015-4148-9
M3 - 文章
AN - SCOPUS:84935006929
SN - 2095-6983
VL - 13
SP - 151
EP - 159
JO - Control Theory and Technology
JF - Control Theory and Technology
IS - 2
ER -