State of the Art in Low-Temperature Combustion Technologies: HCCI, PCCI, and RCCI

Chauhan, Balendra V. S.; Sayyed, Imran; Vedrtnam, Ajitanshu; Garg, Aditi; Bharti, Sawan; Shukla, Mritunjay Kumar

doi:10.1007/978-981-16-8418-0_4

Cited by 6 publications

(5 citation statements)

References 146 publications

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“…It simultaneously reduces NO x emissions by lowering the combustion temperatures to below 1800 K . The most commonly investigated LTC strategies include HCCI, PCCI, and RCCI . The physical implementation of these strategies is fundamentally different in the fuel injection schedule.…”

Section: Clean Combustion Via Engine Modificationsmentioning

confidence: 99%

“…It simultaneously reduces NO x emissions by lowering the combustion temperatures to below 1800 K. 113 The most commonly investigated LTC strategies include HCCI, PCCI, and RCCI. 114 The physical implementation of these strategies is fundamentally different in the fuel injection schedule. The combustion characteristics of these strategies, including combustion phasing, rate of pressure rise, and cylinder peak pressure, are also considerably different.…”

Section: Brief Introduction To Conventional and Ltc Modesmentioning

confidence: 99%

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Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Da Costa,

Bukkarapu,

Fernandes

et al. 2024

Energy Fuels

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Although diesel after-treatment techniques demonstrate a substantial decrease in tailpipe emissions, the primary goal continues to be attaining nearly zero emissions to comply with current regulatory requirements and foreseeable imminent rigorous regulations. To achieve this objective, engine combustion systems and fuel formulations require fine-tuning. Taking insights from the recent literature, this review examines various processes, including homogeneous in situ methods, the incorporation of fuel-borne catalysts, and the use of biofuels. Despite progress in in-cylinder pollution mitigation techniques like low-temperature combustion, which exhibits substantial reductions in oxides of nitrogen (NO x ) and soot emissions, it is crucial to consistently advance technology to conform to evolving emission regulations and environmental concerns. A discussion is presented regarding the advantages and disadvantages of the homogeneous charge compression ignition (HCCI) mode and their potential for the future, focusing on biodiesel-fueled HCCI engines. The review assesses the effectiveness of thermal management strategies and engine design modifications that extend the operational range of HCCI engines powered by biodiesel in light of the inherent limitation of a restricted engine operating range. The review critically examines the merits and demerits of biofuels and HCCI systems and provides an essential analysis of current after-treatment approaches. With an imperative focus, the primary aim of this review is to ascertain modern catalysts designed explicitly for use in contemporary combustion systems. An exhaustive examination of the progress made in diesel oxidation catalysts, selective catalytic reduction techniques, lean NO x traps, diesel particulate filters, and catalyst regeneration is presented. The concluding remarks analyze the catalytic characteristics necessary for smooth incorporation with modern technological developments in various combustion systems.

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Section: Clean Combustion Via Engine Modificationsmentioning

confidence: 99%

Section: Brief Introduction To Conventional and Ltc Modesmentioning

confidence: 99%

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Da Costa,

Bukkarapu,

Fernandes

et al. 2024

Energy Fuels

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“…Numerous studies investigating the effects of vehicular-emitted particulate matter on outcomes such as stroke, all-cause mortality, heart failure, cardiovascular disorders, and respiratory disorders [88][89][90][91] have consistently identified traffic-related particulate matter as a causative agent for pulmonary inflammation, cytotoxicity, and cardiotoxicity [92][93][94][95]. In view of diverse negative health effects, researchers have been working to reduce the emissions from stationary (e.g., diesel engine sets) and non-stationary sources (vehicles) in various ways such as modifying the engine combustion technologies [96], modifying the catalytic converters to reduce the tailpipe emissions [97,98], and by using alternative fuels [99][100][101].…”

Section: Evidence On Health Effects Of Particulates From Vehicular Em...mentioning

confidence: 99%

Review on Sampling Methods and Health Impacts of Fine (PM2.5, ≤2.5 µm) and Ultrafine (UFP, PM0.1, ≤0.1 µm) Particles

Chauhan,

Corada,

Young

et al. 2024

Atmosphere

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Airborne particulate matter (PM) is of great concern in the modern-day atmosphere owing to its association with a variety of health impacts, such as respiratory and cardiovascular diseases. Of the various size fractions of PM, it is the finer fractions that are most harmful to health, in particular ultrafine particles (PM0.1; UFPs), with an aerodynamic diameter ≤ 100 nm. The smaller size fractions, of ≤2.5 µm (PM2.5; fine particles) and ≤0.1 µm (PM0.1; ultrafine particles), have been shown to have numerous linkages to negative health effects; however, their collection/sampling remains challenging. This review paper employed a comprehensive literature review methodology; 200 studies were evaluated based on the rigor of their methodologies, including the validity of experimental designs, data collection methods, and statistical analyses. Studies with robust methodologies were prioritised for inclusion. This review paper critically assesses the health risks associated with fine and ultrafine particles, highlighting vehicular emissions as the most significant source of particulate-related health effects. While coal combustion, diesel exhaust, household wood combustors’ emissions, and Earth’s crust dust also pose health risks, evidence suggests that exposure to particulates from vehicular emissions has the greatest impact on human health due to their widespread distribution and contribution to air pollution-related diseases. This article comprehensively examines current sampling technologies, specifically focusing on the collection and sampling of ultrafine particles (UFP) from ambient air to facilitate toxicological and physiochemical characterisation efforts. This article discusses diverse approaches to collect fine and ultrafine particulates, along with experimental endeavours to assess ultrafine particle concentrations across various microenvironments. Following meticulous evaluation of sampling techniques, high-volume air samplers such as the Chem Vol Model 2400 High Volume Cascade Impactor and low-volume samplers like the Personal Cascade Impactor Sampler (PCIS) emerge as effective methods. These techniques offer advantages in particle size fractionation, collection efficiency, and adaptability to different sampling environments, positioning them as valuable tools for precise characterisation of particulate matter in air quality research and environmental monitoring.

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“…Homogeneous charge compression ignition (HCCI) is an advanced engine technology that implements low-temperature combustion. It offers better fuel efficiency and reduced emissions of harmful exhaust gases, especially NOx [32][33][34][35][36]. It also exhibits good compatibility with alternative fuels, including biofuels and synthetic fuels [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Frictional Losses of Ring Pack in SI and HCCI Engine

Koszalka,

Wolff

2023

Energies

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The vast majority of research dedicated to enhancing the homogenous charge compression ignition (HCCI) low-temperature combustion system is focused on improving controllability, efficiency and emissions. This article aims to assess the impact of HCCI combustion on the operation of the piston ring system. Utilizing the measured pressures in the combustion chamber of a single-cylinder research engine operating in spark ignition (SI) and HCCI modes at various loads, simulations were carried out using an advanced ring pack model. This model integrates the gas flow, ring dynamics and ring mixed lubrication models. Simulations revealed that differences in the pressure above the piston between the HCCI and SI combustion significantly influence ring pack performance. The predicted energy losses due to the friction of piston rings against the cylinder liner are up to 5% higher in the HCCI engine than in the SI engine. This identified drawback diminishes the advantages of the HCCI engine resulting from higher thermal efficiency, and efforts should be made to minimize this negative impact.

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State of the Art in Low-Temperature Combustion Technologies: HCCI, PCCI, and RCCI

Cited by 6 publications

References 146 publications

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Review on Sampling Methods and Health Impacts of Fine (PM2.5, ≤2.5 µm) and Ultrafine (UFP, PM0.1, ≤0.1 µm) Particles

Frictional Losses of Ring Pack in SI and HCCI Engine

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