4.7 Article

In-depth comparison of methanol port and direct injection strategies in a methanol/diesel dual fuel engine

Related references

Note: Only part of the references are listed.
Article Thermodynamics

Experimental investigation the effects of spark discharge characteristics on the heavy-duty spark ignition natural gas engine at low load condition

Xiaojun Yin et al.

Summary: This study investigated the impact of a high energy ignition system on SI engines, which improved fuel economy and shortened ignition delay and flame propagation period at high EGR rates. It was found that NOx emissions were more sensitive to spark discharge energy than HC and CO emissions, with a 26.9% increase in NOx emissions as spark discharge energy increased.

ENERGY (2022)

Article Thermodynamics

Towards a comprehensive understanding of mode transition between biodiesel-biobutanol dual-fuel ICCI low temperature combustion and conventional CI combustion-Part CYRILLIC CAPITAL LETTER BYELORUSSIAN-UKRAINIAN ICYRILLIC CAPITAL LETTER BYELORUSSIAN-UKRAINIAN I: A system optimization at low load

Wenbin Zhao et al.

Summary: This study investigated the mode transition between ICCI low temperature combustion and conventional CI combustion, and found that different mode switching methods under different engine loads can reduce IMEP fluctuations. Delaying the biodiesel injection timing and performing fuel compensation can enhance combustion stability.

ENERGY (2022)

Article Energy & Fuels

Experimental analysis of the EGR rate and temperature impact on combustion and emissions characteristics in a heavy-duty NG engine

Xiaojun Yin et al.

Summary: This study examines the impact of EGR rate and temperature on combustion and emissions characteristics in a natural gas engine. The results show that increasing EGR rate reduces burning rate and extends combustion duration, and optimal spark timing is needed to accommodate the delayed combustion phase. Under high EGR rate, improving EGR temperature optimizes combustion performance. Higher EGR temperature has positive effects on fuel economy, reducing NOx emissions but increasing HC and CO emissions.
Article Energy & Fuels

Comparison of efficiency and emission characteristics in a direct-injection compression ignition engine fuelled with iso-octane and methanol under low temperature combustion conditions

Leilei Xu et al.

Summary: This paper compares the emission characteristics and engine performance of methanol and iso-octane in a heavy-duty direct-injection compression ignition engine operating in HCCI and PPC regimes. Methanol requires a higher intake temperature compared to iso-octane to counter its high heat of vaporization. Methanol ignition delay times are less sensitive to the fuel/air mixture, resulting in lower CO emissions. Methanol achieves lower charge stratification and extends the SOI window with ultra-low NOx emissions. However, it suffers from higher UHC emissions in the HCCI regime. Low mixture stratification PPC case shows the highest engine thermal efficiency and the lowest emissions.

APPLIED ENERGY (2022)

Article Thermodynamics

Towards a comprehensive understanding of mode transition between biodiesel-biobutanol dual-fuel ICCI low temperature combustion and conventional CI combustion- Part I: Characteristics from medium to high load

Wenbin Zhao et al.

Summary: This study investigated the mode switching between ICCI low temperature combustion and conventional CI combustion in a single-cylinder diesel engine, finding that smooth mode switching can be achieved at medium and high engine loads with various control parameters. EGR strategy was used to improve combustion smoothness and NOx emissions.

ENERGY (2022)

Article Thermodynamics

China can reach carbon neutrality before 2050 by improving economic development quality

Guangyue Xu et al.

Summary: This study examines the future trajectory of China's carbon neutrality goal under different scenarios of economic development quality using the environmental Kuznets curve model and scenario analysis. The results indicate that significant improvements in economic development quality are necessary to achieve the carbon neutrality target.

ENERGY (2022)

Article Energy & Fuels

Experimental study of knock combustion and direct injection on knock suppression in a high compression ratio methanol engine

Qimeng Duan et al.

Summary: Methanol is a competitive low carbon fuel for spark ignition engines, but knocking combustion remains an obstacle. Through experimental investigations, it was found that methanol direct injection strategy can effectively suppress knocking combustion, achieving more efficient combustion process.
Review Green & Sustainable Science & Technology

Evaluation of hydrous ethanol as a fuel for internal combustion engines: A review

Xiaochen Wang et al.

Summary: This review focuses on the direct use of hydrous ethanol in internal combustion engines. It provides a brief description of fuel properties relevant to engine applications, discusses the applications of hydrous ethanol in spark ignition and compression ignition engines, and reviews its use in advanced combustion concepts.

RENEWABLE ENERGY (2022)

Article Energy & Fuels

Optical diagnostics on the effects of reverse reactivity stratification on the flame development in dual-fuel combustion

Yanqing Cui et al.

Summary: This study investigated the effects of reverse reactivity stratification on combustion characteristics and flame development, demonstrating the importance of different fuel combinations and injection timings in controlling combustion phasing and flame structure. The introduction of reactivity stratification led to larger flame areas and faster flame speeds, highlighting the significant impact of these factors on combustion processes in dual-fuel engines.
Article Energy & Fuels

Numerical investigation and experimental validation on the leakage of methanol and formaldehyde in diesel methanol dual fuel engine with different valve overlap

Baodong Ma et al.

Summary: The study investigated the methanol and formaldehyde emissions of the diesel methanol dual fuel engine using a computational fluid dynamics model coupled with a detailed chemical kinetic mechanism. The results showed that the unburned methanol and formaldehyde in the cylinder were the main part of the total emissions. When the intake valve opening and exhaust valve closing changed simultaneously, the increase in valve lift during scavenging had a significant impact on methanol leakage.

APPLIED ENERGY (2021)

Article Energy & Fuels

Operation strategy optimization of lean combustion using turbulent jet ignition at different engine loads

Jianxiong Hua et al.

Summary: The study designed a TJI device with additional fuel supply, analyzed its combustion characteristics, and optimized the operation strategy on a single-cylinder engine. The results showed stable combustion and reduced fuel consumption rate at different loads, proposing a technical solution for flexible air/fuel ratio regulation.

APPLIED ENERGY (2021)

Article Energy & Fuels

Effect of pilot fuel properties on lean dual-fuel combustion and emission characteristics in a heavy-duty engine

Zeeshan Ahmad et al.

Summary: In a DF combustion process, the ignition of the pilot fuel, burning of the main fuel near the pilot fuel, and combustion of the remaining main fuel form three overlapping stages. Fuels with high cetane number and aromatic content can achieve high DF combustion efficiency, low methane slip, THC and CO emissions, but lead to increased NOx emissions.

APPLIED ENERGY (2021)

Article Thermodynamics

Multiple combustion modes existing in the engine operating in diesel methanol dual fuel

Baodong Ma et al.

Summary: This study identified four typical combustion modes in a diesel methanol dual fuel engine, with the first and second modes showing higher thermal efficiency. Diesel plays an important role in igniting methanol and improving combustion under different conditions.

ENERGY (2021)

Article Energy & Fuels

Experimental investigation on combustion and emission characteristics of butanol/biodiesel under blend fuel mode, dual fuel RCCI and ICCI modes

Wenbin Zhao et al.

Summary: This study compares the combustion and emission characteristics of three different combustion modes (blend fuel, RCCI, and ICCI) in a diesel engine at different loads. Results show that blend fuel has higher thermal efficiency at low loads, while RCCI and ICCI modes perform better at medium loads. ICCI mode has the potential for higher loads, while RCCI mode cannot operate at high loads due to combustion noise issues.
Article Energy & Fuels

Comparison and analysis of the effects of spark timing and lambda on a high-speed spark ignition engine fuelled with n-butanol/gasoline blends

Qijun Tang et al.

Summary: This study investigated the effects of n-butanol blend ratio, spark timing, and lambda on a high-speed spark ignition engine. Increasing n-butanol ratio was found to improve engine performance but also slightly increase carbon monoxide emissions.
Article Energy & Fuels

Experimental study of butanol/biodiesel dual-fuel combustion in intelligent charge compression ignition (ICCI) mode: A systematic analysis at low load

Wenbin Zhao et al.

Summary: The analysis of the direct injection dual-fuel intelligent charge compression ignition (ICCI) combustion strategy reveals that, under specific conditions, high efficiency and low emissions can be achieved.
Article Energy & Fuels

Optimization on timings of injection and spark of a high compression-ratio stratified-charge methanol engine under ultra-lean burn

Changming Gong et al.

Summary: Achieving ideal stratified-charge combustion is the key to obtaining the best performance of a spark-ignition methanol engine under high compression-ratio and ultra-lean burn. The timings of injection and spark have significant effects on mixture formation, combustion, and emissions, with optimal timings resulting in improved engine performance.
Review Green & Sustainable Science & Technology

Critical review on combustion phenomena of low carbon alcohols in SI engine with its challenges and future directions

T. Sathish Kumar et al.

Summary: This review discusses the importance of alternative fuels in the automotive industry, particularly alcohol fuels, and their impact on the combustion characteristics of engines. Due to the compatibility of alcohol fuels with conventional engines and their potential to reduce greenhouse gas emissions, they have a promising future in SI engines.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Article Energy & Fuels

Experimental study of independent two-stage in-cylinder heat release using jet controlled compression ignition

Bo Li et al.

Summary: The study explores the jet controlled compression ignition mode with dual-direct injectors in a high-speed light-duty diesel engine, achieving a two-stage high-temperature heat release process and improving indicated thermal efficiency while reducing nitrogen oxide emissions. Additionally, delaying pre-injection and stratifying equivalence ratio can effectively modulate the combustion process.
Article Energy & Fuels

Diesel injection strategies for reducing emissions and enhancing the performance of a methanol based dual fuel stationary engine

Kasinath Panda et al.

Summary: The study found that using pilot and main injection strategy can improve combustion rate, peak combustion temperature, and combustion stability while reducing hydrocarbon and carbon monoxide emissions. Meanwhile, employing pilot with main and post injection strategy could decrease the rate of pressure rise, Nitric oxide levels, and average in-cylinder temperature.
Article Thermodynamics

Investigation on mixture formation and combustion characteristics of a heavy-duty SI methanol engine

Zengqiang Zhu et al.

Summary: This paper discusses the importance of heavy-duty natural gas spark ignition engines and the impact of methanol mixture preparation and flow. The study found that an optimized injection strategy can promote mixture homogeneity and improve engine braking thermal efficiency.

APPLIED THERMAL ENGINEERING (2021)

Article Thermodynamics

Autoignition behavior of methanol/diesel mixtures: Experiments and kinetic modeling

Jizhen Zhu et al.

Summary: This study investigates the ignition delay times (IDTs) of methanol/diesel blends with different mixing ratios under various conditions. The research reveals the crossover of IDTs at different temperatures for varying equivalence ratios and the non-linear mixing effect of methanol addition on diesel ignition. Simulation results indicate the competition between methanol and diesel for center dot OH radicals during the ignition process.

COMBUSTION AND FLAME (2021)

Article Thermodynamics

Meeting EURO6 emission regulations by multi-objective optimization of the injection strategy of two direct injectors in a DDFS engine

Sasan Shirvani et al.

Summary: Direct Dual Fuel Stratification (DDFS) is a novel low-temperature combustion strategy with high thermal efficiency and low emissions. By optimizing injection strategies and using Artificial Neural Networks (ANNs), it can meet EURO6 emission standards and improve fuel efficiency.

ENERGY (2021)

Article Energy & Fuels

Effect of EGR strategy on combustion and emission of DMDF engine for meeting China VI emission legislation

Guofan Qu et al.

Summary: The study found that the early injection strategy with high MER resulted in extremely low PM emissions, while increasing EGR rate significantly reduced NOx emissions under different loads. Different EGR modes at 25%, 50%, and 70% loads were needed to meet the legislation limit of NOx emissions, with PM emissions remaining low. The demand for EGR rate was generally higher at light loads compared to medium loads, requiring dual loop (DL) EGR modes for NOx control target.
Article Energy & Fuels

Experimental study of the combustion characteristics prediction model for a sensor-less closed-loop control in a heavy-duty NG engine

Xiaojun Yin et al.

Summary: The study focused on the application of closed-loop combustion control in a six-cylinder natural gas engine, revealing a linear relationship between CA50 and ST, insensitivity of emissions to CA50, and significantly higher NOx emissions at higher EGR rates.
Review Green & Sustainable Science & Technology

Impact of lower and higher alcohols on the physicochemical properties of particulate matter from diesel engines: A review

Meisam Ahmadi Ghadikolaei et al.

Summary: Research indicates that alcohol fuels can have a significant impact on the physical and chemical properties of particulate matter emitted from diesel engines, resulting in reductions in particle size, number, and mass, as well as changes in organic carbon and elemental carbon levels. Lower alcohols in blended mode have a stronger effect than higher alcohols in fumigation mode on reducing pollutants and improving particle properties.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Review Green & Sustainable Science & Technology

A comprehensive review of pilot ignited high pressure direct injection natural gas engines: Factors affecting combustion, emissions and performance

Menghan Li et al.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2020)

Article Green & Sustainable Science & Technology

A comparative study on methanol/diesel and methanol/PODE dual fuel RCCI combustion in an automotive diesel engine

Ganesh Duraisamy et al.

RENEWABLE ENERGY (2020)

Article Thermodynamics

Experimental study on energy balance of different parameters in diesel methanol dual fuel engine

Baodong Ma et al.

APPLIED THERMAL ENGINEERING (2019)

Article Thermodynamics

Optimization of methanol powered diesel engine: A CFD approach

Dinesh Kumar Soni et al.

APPLIED THERMAL ENGINEERING (2016)

Article Transportation Science & Technology

An Experimental Investigation of Fuel Reactivity Controlled PCCI Combustion in a Heavy-Duty Engine

Reed M. Hanson et al.

SAE INTERNATIONAL JOURNAL OF ENGINES (2010)