Nonlinear sliding mode observer for exhaust manifold pressure estimation in a light-duty diesel engine

Lee, J. H.; Lee, H. J.; Sunwoo, Myoungho

doi:10.1007/s12239-014-0040-8

Cited by 10 publications

(3 citation statements)

References 14 publications

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“…The dynamic of the mismatch i a can be obtained using equation (10) from the model equation given in equation (1) and equation (10) (Utkin, 1977;Lee et al, 2014).…”

Section: Design Of Sliding-mode Observer For Angular Velocitymentioning

confidence: 99%

State estimation for motorized seat belt system using sliding-mode observer

Lee

2015

Int.J Automot. Technol.

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This paper describes a sliding-mode observer design for state estimation of a motorized seat belt (MSB) system. The MSB system is an active safety system that can protect passengers and improve passenger convenience by several operations, which prevent and warn to passengers about dangerous driving conditions and reduce the dangerous situation caused by slack and poor return of seat belt. To realize these operations, state information such as the belt winding velocity and tension of belt are required. However measuring this information with sensors increases the system cost and complexity. In this paper, a sliding-mode observer, which estimates requisite state information, is proposed. The designed sliding-mode observer is robust towards system uncertainties and parameter variation and is verified in matched and mismatched parameter cases.

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“…The dynamic of the mismatch i a can be obtained using equation (10) from the model equation given in equation (1) and equation (10) (Utkin, 1977;Lee et al, 2014).…”

Section: Design Of Sliding-mode Observer For Angular Velocitymentioning

confidence: 99%

State estimation for motorized seat belt system using sliding-mode observer

Lee

2015

Int.J Automot. Technol.

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“…There are also some research focused on the exhaust pressure estimation of diesel engine with the VGT EGR system. 15–18 Lee et al 16 designed a nonlinear sliding-mode observer based on an incompressible EGR mass flow modeling. Kim et al 18 proposed a sliding-mode observer for the dual loop EGR and a variable geometry turbocharger (VGT) system for a diesel engine by considering the compressor and turbine outlet as an intuitive regression model.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear observer-based exhaust manifold pressure estimation and fault detection for gasoline engines with exhaust gas recirculation

Jiang

Shen

2019

International Journal of Engine Research

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This article presents a nonlinear observer-based method to estimate the exhaust manifold pressure for the gasoline engines equipped with an exhaust gas recirculation system. A dynamic model is designed to estimate the exhaust manifold pressure, which includes both the intake manifold and exhaust manifold dynamics focusing on gas mass flows. Based on the developed model, a nonlinear exhaust manifold pressure observer is proposed to replace the exhaust manifold pressure sensor, and the global convergence is analyzed by a constructed Lyapunov function and the physical meaning of the time-varying parameters. The experimental validations show that the observer-based exhaust manifold pressure estimator is able to converge to the real value at arbitrary initial value and estimates the exhaust manifold pressure accurately during both the steady-state and transient conditions. Finally, the proposed exhaust manifold pressure observer is applied into the fault detection problem for the exhaust gas recirculation system. The experimental validations show that the observer is able to be used to estimate the exhaust gas recirculation ratio and as an extra signal to assist to detect the faults of the exhaust gas recirculation system accurately.

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“…This is achieved by employing an optimization design method based on acoustic transfer matrix and genetic algorithms [34]. Additionally, the design of an optimized muffler in accordance with standard specifications and FSAE rules is undertaken to achieve optimal muffler and engine performance [35]. Addressing the issue of lowfrequency noise generated by internal combustion engines, several existing muffler design methods, such as the quarter-wavelength tube theory and the Helmholtz muffler, are examined and compared [36].…”

mentioning

confidence: 99%

The Influence of the Frequency of Ultrasound on the Exhaust Gas Purification Process in a Diesel Car Muffler

Kadyrov,

Bembenek,

Sarsembekov

et al. 2024

Applied Sciences

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This research aimed to analyze the possibility of installing an ultrasonic emitter in an already manufactured car and to prove the possibility of cleaning the exhaust gases of an internal combustion engine through the action of an ultrasonic wave due to coagulation and examining the optimal regimes of its work. The existing theoretical solution to describe the proposed process was analyzed. A Mercedes-Benz M-Class ML 270 CDI MT car with the OM 612 DE 27 LA Diesel engine was used for the experiment. An ultrasound generator and an ultrasound emitter were connected to the muffler. The stand was connected to the car via the inlet with a rubber hose that directs the exhaust gases out of the car. The crankshaft speed of the engine was changed in the range of 750 to 1250 rpm, which corresponds to urban conditions when cars are moving in heavy traffic jams. The content of CH, CO, CO2, and O2 in the exhaust gas of the vehicle was determined as a function of the crankshaft speed without ultrasonic exposure and with ultrasonic exposure at an ultrasound frequency of 25, 28, and 40 kHz. The results of the experiment showed that the introduction of an ultrasonic emitter into the muffler reduced the smoke content of the gas, increased the oxygen content, and reduced the amount of carbon dioxide in the exhaust gases. With an increase in the ratio between the ultrasonic frequency and the angular velocity of the engine crankshaft (f/ω), the smoke content of the gas also decreased. At the maximum values of ultrasonic frequency and angular velocity of the engine crankshaft selected in the experimental studies, the minimum value of the ratio of gas smoke indicators was achieved, and the degree of purification was 10–13%. Such results correspond to the condition of optimal operation of the ultrasonic muffler, where the ratio of gas to smoke values should tend to a minimum. These results confirm the potential of using ultrasound as a method for cleaning exhaust gases and underline the need for further research in this area.

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Nonlinear sliding mode observer for exhaust manifold pressure estimation in a light-duty diesel engine

Cited by 10 publications

References 14 publications

State estimation for motorized seat belt system using sliding-mode observer

State estimation for motorized seat belt system using sliding-mode observer

Nonlinear observer-based exhaust manifold pressure estimation and fault detection for gasoline engines with exhaust gas recirculation

The Influence of the Frequency of Ultrasound on the Exhaust Gas Purification Process in a Diesel Car Muffler

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