Effects of pilot injection timing on the combustion noise and particle emissions of a diesel/natural gas dual-fuel engine at low load

Yang, Bo; Wang, Long; Ning, Le; Zeng, Ke

doi:10.1016/j.applthermaleng.2016.03.126

Cited by 100 publications

(22 citation statements)

References 31 publications

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“…In the paper [10], an investigation of the effect of the pilot fuel supply parameters on emissions at low-load conditions was conducted. According to the obtained results, advancing the pilot fuel injection timing results in an increase in the maximum cylinder pressure and heat release rate.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

Kozlov¹,

Grinev²,

Теренченко³

et al. 2019

Energies

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Modern research in the area of internal combustion engines is focused on researching and investigating the technologies that will improve fuel efficiency and decrease emissions. Application of dual-fuel engines is considered as a potential solution to these problems. In the dual-fuel engine, a natural gas-air mixture is ignited by a small amount of the diesel fuel directly injected into a combustion chamber. Pilot fuel injection parameters can strongly effect the combustion process. The aim of this paper is to investigate the effect of such fuel-supply parameters as pilot fuel mass, pilot fuel injection pressure, pilot fuel injection timing and excess air ratio on the combustion process. Investigation is based on the data obtained during bench tests conducted with the use of measurement equipment. The dependences of engine characteristics from the fuel supply parameters under review were obtained based on the results of the experimental study. Optimal values for every investigated fuel-supply parameter were chosen based on the obtained results. Over the course of the investigation, the coefficient for heat release rate according to the Vibe equation was calculated for each operating point.

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Section: Introductionmentioning

confidence: 99%

An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

Kozlov¹,

Grinev²,

Теренченко³

et al. 2019

Energies

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“…Figure 8 shows the effects of pilot injection strategies and fuel properties on in-cylinder pressure and heat release rate. Yang et al [85] studied the effects of pilot injection timing on the combustion noise and particle emissions of a diesel/natural gas dual-fueled engine at low load. In the study, the pilot injection timing was set at 30 • to 5 • BTDC.…”

Section: First Injection Timingmentioning

confidence: 99%

A Review of Early Injection Strategy in Premixed Combustion Engines

Liang

Zhang

et al. 2019

Applied Sciences

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Due to the increasing awareness of environmental protection, limitations on exhaust emissions of diesel engines have become increasingly stringent. This challenges diesel engine manufacturers to find a new balance between engine performance and emissions. Advanced combustion modes for diesel engines, such as homogeneous charge compression ignition (HCCI) and premixed charge compression ignition (PCCI), which can simultaneously reduce exhaust emissions and substantially improve thermal efficiency, have drawn increasing attention. In order to allow enough time to prepare the homogeneous mixture, the early injection strategy has been utilized widely in HCCI and PCCI diesel engines. This paper is aimed at providing a comprehensive review of the effects of early injection parameters on the performance and emissions of HCCI and PCCI engines fueled by both diesel and alternative fuels. Various early injection parameters, including injection pressure, injection timing, and injection angle, are discussed. In addition, the effect of the blending ratio of alternative fuels is also summarized. Every change in parameters has its own advantages and disadvantages, which are explained in detail in order to help researchers choose the best early injection parameters for HCCI and PCCI engines.

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“…However, the diesel-piloted NG engine still present some disadvantages, such as the high emissions of hydrocarbons (HC) and carbon monoxide (CO) under low loads that result from incomplete combustion and high cyclic variations due to unstable combustion at high loads. 6,12 Various strategies, such as exhaust gas recirculation (EGR), 16,17 throttle technology, 18 pilot injection timing, 3,19,20 and the pilot fuel quantity, 12,14,21,22 are used to overcome these obstacles. Incomplete combustion is the primarily cause of an over-lean air/NG mixture in the cylinder at low loads.…”

Section: Introductionmentioning

confidence: 99%

Effects of the substitution rate of natural gas on the combustion and emission characteristics in a dual-fuel engine under full load

Lyu

Zhang

Bao

et al. 2017

Advances in Mechanical Engineering

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Diesel-piloted natural gas has been considered one of the most promising methods of using natural gas in a compression-ignition engine with few modifications, as this approach benefits from a high thermal efficiency resulting from a high compression ratio. This study experimentally investigated the impact of the natural gas substitution rate on the characteristics of combustion and emissions. Tests were performed under full-load operating conditions at a fixed speed of 1200 r/min with optimized injection timing, and the substitution rate of natural gas was varied with the fixed total fuel energy for different analyses. The in-cylinder pressure, pressure rise rate, heat release rate, cyclic variation of the maximum cylinder pressure (P max ) and emissions of HC, CO, NO x , and smoke were analyzed. The results indicate that P max and the maximum pressure rise rate initially increase and then decrease as the substitution rate of natural gas increases, whereas the heat release rate and standard deviation of P max increase. Moreover, HC and CO increase as the substitution rate of natural gas increases, whereas NO x and smoke emissions exhibit a trade-off trend.

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Effects of pilot injection timing on the combustion noise and particle emissions of a diesel/natural gas dual-fuel engine at low load

Cited by 100 publications

References 31 publications

An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

A Review of Early Injection Strategy in Premixed Combustion Engines

Effects of the substitution rate of natural gas on the combustion and emission characteristics in a dual-fuel engine under full load

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