Cyclic moving average control approach to cylinder pressure and its experimental validation

Li, Po; Shen, Tielong; Kako, Junichi; Liu, Kaipei

doi:10.1007/s11768-009-8005-6

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…From the experiments, even when the offset is eliminated, y k has a high noise level. To alleviate the noise effect, a new index generated from the moving average method [14, 15] is employed for modelling. However, the horizon of the moving average method is determined experimentally.…”

Section: Control Schemesmentioning

confidence: 99%

Idle speed performance improvement via torque balancing control in ignition-event scale for SI engines with multi-cylinders

Shen

Liu

2011

International Journal of Engine Research

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Imbalance in torque generation leads to engine speed fluctuation. To improve the idle engine speed performance, the torque balancing control problem is addressed in this paper for multi-cylinder SI engines. To evaluate cylinder-to-cylinder imbalance, the average torque in ignition-event scale is introduced as controlled output, which enables a feedback control to be performed without measurement of instantaneous torque, and the individual spark advances are chosen as control inputs. A linear discrete time model with single input and single output is proposed to represent the dynamics of the imbalance, where a sequentially switching function is introduced to describe the spark advance signals delivered to each cylinder and the differences in torque generation caused by the individual cylinder characteristics are equivalently modelled as unknown offset in the inputs. An estimation algorithm with the proof of convergence is presented to provide on-line estimation of the unknown offset under the passivity assumption of the system. Furthermore, a feedback control law which combines the unknown offset estimation and the model predictive control is proposed. Finally, the unknown offset estimation and the feedback control approach are validated based on the experimental results carried out on a six-cylinder gasoline engine test bench.

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Section: Control Schemesmentioning

confidence: 99%

Idle speed performance improvement via torque balancing control in ignition-event scale for SI engines with multi-cylinders

Shen

Liu

2011

International Journal of Engine Research

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“…Li et al used ARMA model for the dynamics from spark timing to four-cycle moving average of inecylinder pressure at TDC. The results showed that the control scheme could obtain reliable effect for the inecylinder pressure at TDC regulation when engine worked under different fuel injection strategies, load changing and throttle opening disturbances [25].…”

Section: Introductionmentioning

confidence: 98%

Controlling spark timing for consecutive cycles to reduce the cyclic variations of SI engines

Kaleli

Ceviz

ERENTÜRK>

2015

Applied Thermal Engineering

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“…The possibility of sensing the air-fuel ratio of spark ignition (SI) engines leads to the development of effective air-fuel ratio control strategies. There are many researches that have been presented about in-cylinder pressure applications for internal combustion engines control and analysis [1][2][3]. For the air-fuel ratio estimation based on in-cylinder pressure measurement, there are many approaches that have been applied, for example [4].In previous work [5], we have been introduced the air-fuel ratio model based on in-cylinder pressure measurement for calculation of the static air-fuel ratio of the SI engine.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Air Fuel Ratio Model Using a Least Absolute Shrinkage and Selection Operator

Khajorntraidet¹,

Shen²,

Ito³

2015

Proceedings of the 2015 International Conference on Modeling, Simulation and Applied Mathematics

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the improvement of an air-fuel ratio model based on in-cylinder pressure measurement is presented. This model has be en applied for calculation of static air-fuel ratio of spark ignition (S I) engines. In addition, it can be replaced the lambda sensors in feedback air-fuel ratio control systems. However the parameters of the model obtained from ridge regression method compose of few small coefficients, in practical applications, these small coefficients cannot be ignored because they affect the airfuel ratio calculation error. Therefore, the authors propose modification of the air-fuel ratio model structure and also the model identification method using a least absolute shrinkage and selection operator (LASSO). With the application of this method, some coefficients are shrunk to zero then the model structure is simplified. The results compared with ridge regression show that this proposed method can improve the structure of the air-fuel ratio model without increasing of the calculation error.

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Cyclic moving average control approach to cylinder pressure and its experimental validation

Cited by 8 publications

References 9 publications

Idle speed performance improvement via torque balancing control in ignition-event scale for SI engines with multi-cylinders

Idle speed performance improvement via torque balancing control in ignition-event scale for SI engines with multi-cylinders

Controlling spark timing for consecutive cycles to reduce the cyclic variations of SI engines

Improvement of Air Fuel Ratio Model Using a Least Absolute Shrinkage and Selection Operator

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