Variable Valve Actuation Strategies for Better Efficiency Load Range and Thermal Management in an RCCI Engine

Mikulski, Maciej; Balakrishnan, Praveen Ramanujam; Doosje, E Erik; Bekdemir, C Cemil

doi:10.4271/2018-01-0254

Cited by 29 publications

(23 citation statements)

References 32 publications

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“…Model simulations for the marine engine presented in the study [23] are a very important part of research on this topic due to the advantages that slow-and medium-speed engines working in the DF mode have. This study is also largely based on technical solutions used in marine engines, the development of which largely determines the future of DF engines, which is supported by many publications [18][19][20]34], including technical solutions in marine engines.…”

Section: Explicationmentioning

confidence: 99%

A review of technical solutions for RCCI engines

Szamrej¹,

Karczewski²,

Chojnowski³

2021

Combustion Engines

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Nowadays, internal combustion engines are being developed in the directions that allow to maximize the efficiency of their work, in order to make the most economical use of fuels. The low-temperature method of burning fuels in HCCI engines - Homogenous Charge Compression Ignition - allows to improve the efficiency of the engine, thanks to the reduction of energy lost during cobustion process. For the further development of engines with this type of mixture auto-ignition, with increasing the range of fuels used for that king of engines, it is necessary to develop the RCCI engines. Reactivity-Controlled Compression Ignition - RCCI - is the way to control the air-fuel mixture auto-ignition by using the injection of second fuel injected into the combustion chamber before the combustion begins. The development of modern compression ignition engines is strongly dependent on engines with this type of ignition. Using two fuels with different physicochemical properties makes it possible to control the time of compression ignition and allows to use engine in full range of operation. RCCI is a special type of HCCI engine that allows to use many types of fuels with high combustion efficiency and low emission of harmful exhaust components. The paper analyzes the issues related to the adoption and development of engines with this method of ignition.

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Section: Explicationmentioning

confidence: 99%

A review of technical solutions for RCCI engines

Szamrej¹,

Karczewski²,

Chojnowski³

2021

Combustion Engines

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“…Variable valve timing leads to improved fuel economy and lower emissions by decoupling the valve timing from the piston motion [13]. This is especially valid in case of advanced combustion technologies, as described in [14,15].…”

Section: Fuel Injection and Variable Valve Timing (Vvt)mentioning

confidence: 99%

Modeling, System Identification, and Control of Electromagnetic Actuators

Forrai¹

2018

Actuators

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This chapter is dedicated to modeling, system identification, and control of electromagnetic actuators with the main focus on the actuators used in magnetic levitation, in fuel injection systems, and in variable valve timing (VVT). These actuators have a simple structure, good reliability, and low manufacturing costs. However, from control viewpoint, they are nonlinear systems and are open-loop unstable. Therefore, mathematical modeling, system identification-based parameter estimation, and control strategies are presented, when the moving armature is controlled around an equilibrium position or is controlled between the two extreme positions of the armature.

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“…On the other hand, the ubiquitous downsizing of engines [ 6 ] raises new challenges for alternative power systems. This is compounded by modifications to the combustion process, such as Controlled Auto-Ignition (CAI)/Homogeneous Charge Compression Ignition (HCCI) [ 7 , 8 ], High Pressure Direct Injection (HPDI), or Reactivity Controlled Compression Ignition (RCCI) [ 9 ], which are partly met by LPG systems using petrol injectors [ 10 ]. Emissions legislation concerning the vehicle homologation process is also a problem [ 11 , 12 ], in which Worldwide harmonized Light vehicles Test Cycle (WLTC) and Real Driving Emissions test (RDE) driving cycles play a dominant role [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Model Evaluation of the Influence of the Plunger Stroke on Functional Parameters of the Low-Pressure Pulse Gas Solenoid Injector

Szpica

Kusznier

2021

Sensors

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The article presents a model-based evaluation of the impact of the plunger stroke on functional parameters of the low-pressure pulse gas solenoid injector. A reduced-order physics-based mathematical model was used to achieve this goal. The model was built on the basis of specified simplifications of the process, considering the forces that cause the plunger to move and the forces constituting resistance to its displacement. The implementation of a mathematical description in to the Matlab-Simulink environment allowed one to determine the characteristic values of operation of the Valtek Rail Type-30 injector, including plunger displacement courses. Calculations made with the assumption of the factory plunger stroke confirmed the validity of the model. The differences in opening and closing times were below 3% in comparison to the values given in the objects technical information. By assuming a specific plunger stroke, the functional relationships of opening and closing times were determined. The results showed a distortion of the force–response dependence for different plunger strokes. Results presented in the article can be used to support control-oriented modeling of systems incorporating pulsed gas dosing devices, such as combustion engines or gas turbines. More specifically, the proposed method can be used to pre-calibrate the delay time of the injector operation.

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Variable Valve Actuation Strategies for Better Efficiency Load Range and Thermal Management in an RCCI Engine

Cited by 29 publications

References 32 publications

A review of technical solutions for RCCI engines

A review of technical solutions for RCCI engines

Modeling, System Identification, and Control of Electromagnetic Actuators

Model Evaluation of the Influence of the Plunger Stroke on Functional Parameters of the Low-Pressure Pulse Gas Solenoid Injector

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