A control-oriented two-zone charge mixing model is developed to simplify, but to describe mixing of fresh charge and residual gas during the intake stroke. Engine valve timing has a strong influence on the realization of stable homogeneous charge compression ignition (HCCI), since it affects turbulent flow that promotes mixing of fresh charge and residual gas. Controlled auto-ignition of a HCCI...

The initial boundary conditions, combustion, and emission characteristics of methyl decanoate (MD) mixed with different proportions n-heptane (N-Hep) for homogeneous charge compression ignition (HCCI) are studied in this work. MAN B&W 6S70MC two-stroke diesel engine was used as the model reactor. results showed that, when equivalence ratio is 0.48, NO emissions MD N-Hep HCCI combustion proc...

Homogeneous Charge Compression Ignition (HCCI) combustion is a pioneer method of combustion in which pre-mixed fuel and oxidizer (typically air) are compressed to the point of auto-ignition. HCCI engines can operate with most alternative fuels, especially, dimethyl ether (DME) which has been tested as a possible diesel fuel due to its simultaneously low NOx and PM emissions. In this paper a ...

homogenous charge compression ignition (hcci) combustion is spontaneous multi-site combustion of a nominally premixed air/fuel mixture that exhibits high rate of pressure rise and short combustion duration. to avoid excessive pressure rise rate and knocking, hcci engines are fueled with highly diluted mixture using a combination of excess air and/or egr. hcci combustion is attractive due to ext...

In development of Homogeneous Charge Compression Ignition (HCCI) engines, simultaneous control of combustion phasing and power output has been a major challenge. In this study, a new strategy is developed to control the engine power output and combustion phasing at any desired operating condition. A single zone thermodynamic model coupled to a full kinetic mechanism of Primary Reference Fuels (...

A. Roubaud**, V. Mahulkar, P. Leyland and D. Favrat Laboratory for Industrial Energy systems, Swiss Federal Institute of Technology of Lausanne, Switzerland J.B. Vos CFS engineering, Scientific Park, Lausanne, Switzerland Abstract This paper deals with the simulation of HCCI combustion based on a generic rapid compression machine experiment as a test bed, and using a coupled CFD code-chemical k...

Modeling engines using physics-based approaches is a traditional and widely-accepted method for predicting in-cylinder pressure the start of combustion (SOC). However, developing such intricate models typically demands significant effort, time, knowledge about underlying physical processes. In contrast, machine learning techniques have demonstrated their potential building that are not only rap...

High Chromium Cast Iron (HCCI) is mostly utilised in environments under severe abrasion and corrosion wear conditions, research on this material with added niobium obtained positive results regarding resistance. The casting process has surface finish dimensional accuracy limitations compared to machining processes. There are too few studies about HCCI machinability no one additions. may allow n...

We propose a model based control strategy to adapt the injection settings according to the air path dynamics on a Diesel HCCI engine. This approach complements existing airpath and fuelpath controllers, and aims at accurately controlling the start of combustion. For that purpose, start of injection is adjusted based on a Knock Integral Model and intake manifold conditions. Experimental results ...