Adaptation of a zero-dimensional cylinder pressure model for diesel engines using the crankshaft rotational speed

Weißenborn, E.; Bossmeyer, Thomas M.; Bertram, Torsten

doi:10.1016/j.ymssp.2010.08.016

Cited by 14 publications

(18 citation statements)

References 36 publications

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“…They do not depend on the rotational speed of the crankshaft, which has been proved in many previous papers. This was confirmed by both machine learning model simulations [26], using artificial neural network modeling [27], a zero-dimensional cylinder pressure model [28], the crankshaft rotation measurement experimental method [29], using the crankshaft dynamics research method [30], a comparison of frictional losses research [31], and both by studying the influence of initial starting conditions on the above factors [32].…”

mentioning

confidence: 81%

“…The system works as follows: an electromagnet (31), whose operation is controlled by the electronic control unit of the nozzles (11), is added to the fuel supply system of the engine with a mechanical cable throttle actuator. The core of the electromagnet is connected to the tension roller (27) through which the control cable passes to the throttle (28).…”

Section: Working Out the Fuel Supply Systemmentioning

confidence: 99%

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Improving Fuel Economy of Spark Ignition Engines Applying the Combined Method of Power Regulation

et al. 2020

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One of the disadvantages of spark ignition engines, whose power is regulated by throttling, is the increased fuel consumption at low loads and when the engine is idle. The combined method of engine power regulation by switching off the cylinder group and throttling working cylinders is one of the effective ways to improve fuel economy in the above-mentioned modes. This article presents the research results of the combined method of engine power regulation which can be realized by minor structural changes in operating conditions. The method implies the following: at low loads and at idle speed of the engine. Fuel supply to the group of cylinders is switched off with the simultaneous increase of the cyclic fuel supply in the working cylinders. The adequacy of the calculated results has been checked by the indication of operating processes in switched off and working cylinders. The research results of a six-cylinder spark ignition engine with the distributed gasoline injection using the combined power regulation system have been shown. The angles of opening the throttle which provides a non-shock transition from the operation with all cylinders to the operation with the cylinder group switched off have been determined.Energies 2020, 13, 1076 2 of 19 forced idling. In this case, most of the time cars move at a low speed, with the engine running at low loads and at idle speed.Operating modes of automobile engines under operating conditions have been investigated in many papers. At low speed and low load, high heat transfer and combustion losses occur, directly affecting engine operating conditions [1]. In most cases, these actual engine operating conditions are not reflected in standardized driving cycles and, sometimes, summaries of experimentally-derived cycles are also used to evaluate traffic jams [2]. Design changes, such as ceramic-coated engines, have also been used to reduce heat loss, which, when used in combination with biodiesel as fuel, have shown optimum engine operating conditions [3]. This effect is also noticeable when using triglyceride-based biodiesel as fuel [4]. Hydroxyl gas can also be used as an indicator to improve engine natural conditions, resulting in higher thermal efficiency and improved exhaust emissions [5]. The possible use of biobutanol as another source of biofuels and similar trends in engine operating conditions due to its higher oxidative stability [6] as a spark ignition [7], as a compression ignition engines [8]. It is also known that the use of alcohol additives in petrol improves its properties and achieves an ecological effect [9]. The EGR system shows a different reduction in cycle pressure [10] which is noticeable when operating small engines [11]. Studies [12][13][14][15] shows that the basic operating modes of both freight and passenger vehicles moving in cities are part speed and loading modes. They involve acceleration, steady mode, and active and forced idling while driving and braking the car. Most of the time the vehicular engines run the open throttle or with a fuel s...

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confidence: 81%

Section: Working Out the Fuel Supply Systemmentioning

confidence: 99%

Improving Fuel Economy of Spark Ignition Engines Applying the Combined Method of Power Regulation

et al. 2020

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“…This results in vehicle-to-vehicle variations in the measurements that should be compensated for to achieve robustness in the misfire detection algorithm. Both in (Weißenborn et al, 2011) and Paper 6, the estimated flywheel tooth angle errors were in an interval of around ±0.06…”

Section: Misfire Detection Based On Crankshaft Angular Velocity Measumentioning

confidence: 92%

Diagnosability performance analysis of models and fault detectors

Jung

2015

Linköping Studies in Science and Technology. Dissertations

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The cover: Graphical illustration of the proposed quantitative fault detectability and isolability performance measure, called distinguishability (Di,j(θ)). Typeset with L A T E X 2εPrinted by LiU-Tryck, Linköping, Sweden 2015 To Ylva i Abstract Model-based diagnosis compares observations from a system with predictions using a mathematical model to detect and isolate faulty components. Analyzing which faults that can be detected and isolated given the model gives useful information when designing a diagnosis system. This information can be used, for example, to determine which residual generators can be generated or to select a sufficient set of sensors that can be used to detect and isolate the faults. With more information about the system taken into consideration during such an analysis, more accurate estimations can be computed of how good fault detectability and isolability that can be achieved.Model uncertainties and measurement noise are the main reasons for reduced fault detection and isolation performance and can make it difficult to design a diagnosis system that fulfills given performance requirements. By taking information about different uncertainties into consideration early in the development process of a diagnosis system, it is possible to predict how good performance can be achieved by a diagnosis system and avoid bad design choices. This thesis deals with quantitative analysis of fault detectability and isolability performance when taking model uncertainties and measurement noise into consideration. The goal is to analyze fault detectability and isolability performance given a mathematical model of the monitored system before a diagnosis system is developed.A quantitative measure of fault detectability and isolability performance for a given model, called distinguishability, is proposed based on the Kullback-Leibler divergence. The distinguishability measure answers questions like "How difficult is it to isolate a fault f i from another fault f j ?". Different properties of the distinguishability measure are analyzed. It is shown for example, that for linear descriptor models with Gaussian noise, distinguishability gives an upper limit for the fault to noise ratio of any linear residual generator. The proposed measure is used for quantitative analysis of a nonlinear mean value model of gas flows in a heavy-duty diesel engine to analyze how fault diagnosability performance varies for different operating points. It is also used to formulate the sensor selection problem, i.e., to find a cheapest set of available sensors that should be used in a system to achieve required fault diagnosability performance.As a case study, quantitative fault diagnosability analysis is used during the design of an engine misfire detection algorithm based on the crankshaft angular velocity measured at the flywheel. Decisions during the development of the misfire detection algorithm are motivated using quantitative analysis of the misfire detectability performance showing, for example, varying detection performance a...

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“…Detailed models of elastic engine shafting for both speed and gas pressure torque prediction are widely used [8,[26][27][28], but issues related to insufficiently accurate prediction was reported as well, and addressed to some level of imbalance in friction modelling and neglecting auxiliaries powertrain [8,26]. The wealth of literature, however, references simplified Single Degree of Freedom (1-DoF) [9][10][11][12][13][14][29][30][31] or 2-DoF rigid body dynamic models [32]. In this work, considering model application to the steady-state operation, simplified 1-DoF dynamic engine model is applied along with detailed angle resolved friction model.…”

Section: Engine Dynamic and Friction Modelmentioning

confidence: 99%

“…Engine speed disturbances due to incremental disc geometric faults were corrected using improved crankshaft energy concept [11][12][13]. Similar approach related to combustion in CI engine was also presented by Weißenborn et al [14].…”

Section: Introductionmentioning

confidence: 99%

Possibilities to identify engine combustion model parameters by analysis of the instantaneous crankshaft angular speed

Popović¹,

Tomic

2014

THERM SCI

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In this paper, novel method for obtaining information about combustion process in individual cylinders of a multi-cylinder spark ignition engine based on instantaneous crankshaft angular velocity is presented. The method is based on robust box constrained Levenberg-Marquardt minimization of non-linear least squares given for measured and simulated instantaneous crankshaft angular speed which is determined from the solution of the engine dynamics torque balance equation. Combination of in-house developed comprehensive zero-dimensional two-zone spark ignition engine combustion model and analytical friction loss model in angular domain have been applied to provide sensitivity and error analysis regardingWiebe combustion model parameters, heat transfer coefficient, and compression ratio. The analysis is employed to evaluate the basic starting assumption and possibility to provide reliable combustion analysis based on instantaneous engine crankshaft angular speed.

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Adaptation of a zero-dimensional cylinder pressure model for diesel engines using the crankshaft rotational speed

Cited by 14 publications

References 36 publications

Improving Fuel Economy of Spark Ignition Engines Applying the Combined Method of Power Regulation

Improving Fuel Economy of Spark Ignition Engines Applying the Combined Method of Power Regulation

Diagnosability performance analysis of models and fault detectors

Possibilities to identify engine combustion model parameters by analysis of the instantaneous crankshaft angular speed

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