Volkswagen’s new 2.0 l TDI engine for the most stringent emission standards — Part 2

Hadler, Jens; Rudolph, Falko; Dorenkamp, Richard; Kösters, Martina; Mannigel, Dieter; Veldten, Burkhard

doi:10.1007/bf03227897

Cited by 14 publications

(10 citation statements)

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“…The motoring pressure for the IHR can be calculated by using (8). However, it has a high computational load when calculating the power of the ratio between the cylinder volumes in (8).…”

Section: Motoring Pressure Processingmentioning

confidence: 99%

“…However, it has a high computational load when calculating the power of the ratio between the cylinder volumes in (8). In fact, it takes over 41.7 ms to calculate the power of a number with a MPC5554 PowerPC microcontroller, which was developed for engine management systems.…”

Section: Motoring Pressure Processingmentioning

confidence: 99%

“…In addition, the cost of a cylinder pressure sensor has been reduced in recent years. In 2008, diesel engine systems with combustion control using pressure sensors were introduced by Volkswagen and previous research [3,8].…”

Section: Introductionmentioning

confidence: 99%

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Real-time start of a combustion detection algorithm using initial heat release for direct injection diesel engines

Oh¹,

Min

Sunwoo

2015

Applied Thermal Engineering

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“…The motoring pressure for the IHR can be calculated by using (8). However, it has a high computational load when calculating the power of the ratio between the cylinder volumes in (8).…”

Section: Motoring Pressure Processingmentioning

confidence: 99%

Section: Motoring Pressure Processingmentioning

confidence: 99%

See 1 more Smart Citation

Real-time start of a combustion detection algorithm using initial heat release for direct injection diesel engines

Oh¹,

Min

Sunwoo

2015

Applied Thermal Engineering

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“…Thus, a software solution is preferred which predicts valve states using data of already existing sensors. Recently, the pressure sensor glow plug was introduced allowing for cylinder pressure onboard monitoring with regard to combustion control [1]. In this paper, we employ incylinder pressure curves acquired by this pressure sensor to detect the state of engine valves.…”

Section: Introductionmentioning

confidence: 99%

Towards real-time and memory efficient predictions of valve states in diesel engines

Komma

Zell

2009

2009 IEEE Workshop on Computational Intelligence in Vehicles and Vehicular Systems

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Abstract-To reduce production costs of current engines, car manufacturers strive to replace built-in sensors by software solutions. However, the limitations of current micro controllers require time and memory efficient algorithms. In this paper, we propose a real-time framework for the detection of engine valve states based on wavelet analysis of in-cylinder pressure curves. Extracted wavelet features are then filtered out using mutual information such that only the most relevant wavelet coefficients become the input of the chosen support vector regressor. A further speedup is achieved by an approximation of the support vector solution which comprises less support vectors. We show that the combination of relevant feature selection and the regressor model simplification results in a significant decrease of the recall phase complexity while retaining good generalization performance.

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“…Some modern diesel engines are equipped with incylinder pressure transducers, which can be used as a source of combustion related data [2,3]. Currently incylinder pressure data is mainly used for obtaining information related to aging of engine components as well as for adaptation of the injection strategy with respect to the variation in the fuel quality [4].…”

Section: Introductionmentioning

confidence: 99%

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

Vihar

Baškovič

Katrašnik

2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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Abstract. This paper presents a control-oriented thermodynamic model capable of predicting nitrogen oxides (NO x ) emissions in diesel engines. It is derived from zero-dimensional combustion model using in-cylinder pressure as the input. The methodology is based on a two-zone thermodynamic model which divides the combustion chamber into a burned and unburned gas zone. The original contribution of proposed method arises from: (1) application of a detailed two-zone modeling framework, developed in a way that the thermodynamic equations could be solved in a closed form without iterative procedure, which provides the basis for achieving high level of predictiveness, on the level of real-time capable models and (2) introduction of relative air-fuel ratio during combustion as a main and physically motivated calibration parameter of the NO x model. The model was calibrated and validated using data sets recorded in two different direct injection diesel engines, i.e. a light and a heavy-duty engine. The model is suitable for real-time applications since it takes less than a cycle to complete the entire closed cycle thermodynamic calculation including NO x prediction, which opens the possibility of integration in the engine control unit for closed-loop or feed-forward control.

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Volkswagen’s new 2.0 l TDI engine for the most stringent emission standards — Part 2

Cited by 14 publications

References 0 publications

Real-time start of a combustion detection algorithm using initial heat release for direct injection diesel engines

Real-time start of a combustion detection algorithm using initial heat release for direct injection diesel engines

Towards real-time and memory efficient predictions of valve states in diesel engines

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

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Volkswagen’s new 2.0 l TDI engine for the most stringent emission standards — Part 2

Cited by 14 publications

References 0 publications

Real-time start of a combustion detection algorithm using initial heat release for direct injection diesel engines

Real-time start of a combustion detection algorithm using initial heat release for direct injection diesel engines

Towards real-time and memory efficient predictions of valve states in diesel engines

Real-time capable virtual NOx sensor for diesel engines based on a two-Zone thermodynamic model

Contact Info

Product

Resources

About

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model