... catalytic reduction (SCR) systems are effective ways in diesel engine after-treatment systems to meet increasingly stringent emission regulations. To achieve high NO x reduction efficiency and low NH 3 slip, the control of the SCR system becomes more challenging, especially in transient operating...

... into a range where not only the oxygen sensor but also the whole estimation system exhibits lower measurement uncertainty. Validations are provided by both simulation results based on a high-fidelity GT-Power engine model and experimental results on a medium-duty turbo-charged diesel engine platform...

... of the cylinder wall temperature may not be sufficient in sophisticated control of combustion processes. This paper aims to estimate the cylinder wall temperature, on a cycle-by-cycle basis, through cylinder pressure signals in diesel engines. In the proposed methods, the cylinder wall temperature is modeled...

... was designed to control the urea injection rate for achieving different ammonia storages in the two catalysts. Experimental data from a US06 test cycle conducted on a medium-duty Diesel engine system showed that, with the similar total engine-out NO x emissions and NH 3 (AdBlue) consumptions, the proposed ASDC...

...Chris A. Satkoski; Gregory M. Shaver; Ranjit More; Peter Meckl; Douglas Memering; Shankar Venkataraman; Jalal Syed; Jesus Carmona-Valdes As engine designers look for ways to improve efficiency and reduce emissions, piezoelectric actuated fuel injectors for common rail diesel engines have shown...

... characteristics within DPF and selective catalytic reduction (SCR) systems, two most promising diesel engine aftertreatment systems. Although the majority of diesel engine-out NO x emissions is NO, the commonly used DOC located upstream of a DPF and a SCR can convert a considerable amount of NO to NO 2...

...-squares estimation scheme. The estimator is tested on a high-fidelity diesel engine simulator as well as on experimental data obtained at various operating conditions. The results obtained show the effectiveness of the estimator in reconstructing the cylinder pressure on a crank-angle basis...

... aftertreatment. A flexible, computationally efficient, and whole engine simulation model for a 2007 6.7 l diesel engine with exhaust gas recirculation (EGR), variable geometry turbocharging (VGT), and common rail fuel injection was validated after extensive experimentation. This model was used to develop...

...Ming-Feng Hsieh; Junmin Wang; Marcello Canova This paper describes a two-level nonlinear model predictive control (NMPC) scheme for diesel engine lean NO x trap (LNT) regeneration control. Based on the physical insights into the LNT operational characteristics, a two-level NMPC architecture...

...Javad Mohammadpour; Karolos Grigoriadis; Matthew Franchek; Benjamin J. Zwissler In this paper, we present a real-time parameter identification approach for diagnosing faults in the exhaust gas recirculation (EGR) system of Diesel engines. The proposed diagnostics method has the ability to detect...

... larger than in SI engines. This paper documents the results of a research activity focused on the control of the start and stop dynamics of a HEV with a belted starter/alternator. The work was conducted on a production 1.9 l common-rail diesel engine coupled to a 10.6 kW permanent magnet motor...

... and their low reliability has so far prevented their widespread use in production automotive engines. feedback control ignition timing ionization ion current minimum variance neural network PPP control principal-component analysis diesel engines engine cylinders feedback fuel systems...

... the properties of the fuel blend can be estimated accurately, on-vehicle, in real-time. To this end, this paper presents a method to practically estimate the biodiesel content of fuel being used in a diesel engine during steady-state operation. The simple generalizable physically motivated estimation strategy...

...Alok A. Joshi; Peter Meckl; Galen King; Kristofer Jennings A novel information-theoretic stepwise feature selector (ITSFS) is designed to reduce the dimension of diesel engine data. This data consist of 43 sensor measurements acquired from diesel engines that are either in a healthy state or in one...

...Alok A. Joshi; Scott James; Peter Meckl; Galen King; Kristofer Jennings Degradation in the cooling effectiveness of a charge-air cooler (CAC) in a medium-duty turbocharged diesel engine has significant impact on engine performance. This degradation lowers the boost pressure and raises the intake...

.... In this context, these valves control the turbocharger operation in a two-stage sequential turbocharged diesel engine. With the purpose of providing the model with information, several characterization tests of the elements that integrate the vacuum system were performed. Related to the theoretical contents, two...

...%. On the other hand, limited operating range is observed in Test B when RBL is changed while fuel is kept fixed. 12 12 2005 29 02 2008 05 12 2008 combustion diesel engines engine cylinders exhaust systems sensitivity analysis The basic idea of homogeneous charge...

... combustion can be implemented in direct injection diesel engines without major modifications by introducing a specialized fuel injector in the intake port. This decouples the homogeneous mixture formation from the traditional in-cylinder injection, thus providing two fueling systems that can be used...

... the measured data. Weighted linear local models (LLMs) have already been used in engine emission N O x control applications as an extension of radial basis function network sometime referred to as local linear neurofuzzy tree network ( 18 19 ) as well as in diesel engine drivetrain modeling ( 20...

...Giampiero Campa; Manoharan Thiagarajan; Mohan Krishnamurty; Marcello R. Napolitano; Mridul Gautam This paper presents the design of a complete sensor fault detection, isolation, and accommodation (SFDIA) scheme for heavy-duty diesel engines without physical redundancy in the sensor capabilities...