Cylinder Individual Feedback Control of Combustion in a Dual Fuel Engine

Ott, Tobias; Zurbriggen, Florian; Onder, Christopher H.; Guzzella, Lino

doi:10.3182/20130904-4-jp-2042.00080

Cited by 22 publications

(19 citation statements)

References 10 publications

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“…The start of injection and the duration of injection of the Diesel fuel are controlled based on the measured cylinder pressure. More details on the controller design can be found in [13].…”

Section: Engine Controlmentioning

confidence: 99%

Hybrid-Electric Vehicle with Natural Gas-Diesel Engine

2013

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Abstract:In this paper we demonstrate the potential of combining electric hybridization with a dual-fuel natural gas-Diesel engine. We show that carbon dioxide emissions can be reduced to 43 gram per kilometer with a subcompact car on the New European Driving Cycle (NEDC). The vehicle is operated in charge-sustaining mode, which means that all energy is provided by the fuel. The result is obtained by hardware-in-the-loop experiments where the engine is operated on a test bench while the rest of the powertrain as well as the vehicle are simulated. By static engine measurements we demonstrate that the natural gas-Diesel engine reaches efficiencies of up to 39.5%. The engine is operated lean at low loads with low engine out nitrogen oxide emissions such that no nitrogen oxide aftertreatment is necessary. At medium to high loads the engine is operated stoichiometrically, which enables the use of a cost-efficient three-way catalytic converter. By vehicle emulation of a non-hybrid vehicle on the Worldwide harmonized Light vehicles Test Procedure (WLTP), we demonstrate that transient operation of the natural gas-Diesel engine is also possible, thus enabling a non-hybridized powertrain as well.

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“…The start of injection and the duration of injection of the Diesel fuel are controlled based on the measured cylinder pressure. More details on the controller design can be found in [13].…”

Section: Engine Controlmentioning

confidence: 99%

Hybrid-Electric Vehicle with Natural Gas-Diesel Engine

2013

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“…In-cylinder pressure feedback control finds application in classical spark-ignition engines 5,6 and compression ignition engines, 7,8 but also in advanced combustion concepts. [9][10][11][12] Control is an important topic for modern internal combustion engines and will even become more important as the systems are getting more complex in the future. [13][14][15] General information about engine control and modeling can be found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Fast and robust adaptation of lookup tables in internal combustion engines: feedback and feedforward controllers designed independently

Zurbriggen

Ott

Onder

2015

Proceedings of the Institution of Mechanical Engineers, Part D:

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Adaptive feedforward control is a common approach for handling uncertainties and time-varying effects in automotive control applications. The adaptation of the feedforward controller, usually formed by a lookup table, is often combined with a linear feedback controller. The feedforward controller is used to overcome the nonlinearities that are due to variations of the operating point. The feedback controller is used to deal with fast disturbances. If the system behavior is changing, for example due to varying fuel qualities or aging effects, the feedforward controller has to be adapted. A common problem is the fact that the bandwidths of the feedback controller and the adaptation of the feedforward controller have to be separated, i.e. the adaptation of the feedforward controller has to be slower than the feedback controller. Otherwise, the coupling effects lead to an unexpected behavior of the control system, which may also lead to instability. This paper presents an analysis of this effect using a linear representation of the adaptation of the feedforward controller. Based on the results of this analysis, the paper presents a method to decouple the feedback controller and the adaptation of the feedforward controller, which allows a fast adaptation of the feedforward controller. Ideally, the adaptation is as fast as the feedback controller. The system is then able to adapt during operating point transients without the need to stay at some operating points for longer periods. The proposed method does not depend on the structure of the feedforward controller, nor does it depend on the method of the adaptation. Experiments on a natural gas-diesel dual-fuel engine are used to validate the proposed method.

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“…Production-type cylinder pressure sensors are available in the form of pressure sensor glow plugs [25], a combination of pressure sensor and glow plug. This section is a short repetition of the findings of [17,18]. Three different controllers are introduced.…”

Section: Feedback Combustion Controlmentioning

confidence: 99%

“…Such disturbances can best be compensated using feedback control [17,18]. Pure feedforward combustion control may lead to an unexpected or unstable behavior.…”

Section: Feedback Combustion Controlmentioning

confidence: 99%

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Diesel-Minimal Combustion Control of a Natural Gas-Diesel Engine

2016

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This paper investigates the combustion phasing control of natural gas-diesel engines. In this study, the combustion phasing is influenced by manipulating the start and the duration of the diesel injection. Instead of using both degrees of freedom to control the center of combustion only, we propose a method that simultaneously controls the combustion phasing and minimizes the amount of diesel used. Minimizing the amount of diesel while keeping the center of combustion at a constant value is formulated as an optimization problem with an equality constraint. A combination of feedback control and extremum seeking is used to solve this optimization problem online. The necessity to separate the different time scales is discussed and a structure is proposed that facilitates this separation for this specific example. The proposed method is validated by experiments on a test bench.

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Cylinder Individual Feedback Control of Combustion in a Dual Fuel Engine

Cited by 22 publications

References 10 publications

Hybrid-Electric Vehicle with Natural Gas-Diesel Engine

Hybrid-Electric Vehicle with Natural Gas-Diesel Engine

Fast and robust adaptation of lookup tables in internal combustion engines: feedback and feedforward controllers designed independently

Diesel-Minimal Combustion Control of a Natural Gas-Diesel Engine

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