Abstract

The new blended fuel (gasoline/hydrogenated catalytic biodiesel) is expected to address the cold start problem under low temperature of gasoline compression ignition due to its excellent ignition performance. Additionally, its spray behavior as the combustion boundary condition could have a direct impact on the characteristics of subsequent combustion. Therefore, the objective of this study is to reveal the effects of hydrogenated catalytic biodiesel/gasoline on the spray characteristics under various ambient conditions. As a significant index of spray characteristics, the spray penetration was achieved by applying Mie scattering methods under nonevaporation and evaporation conditions on a constant volume combustion chamber. In addition, the experimental results were compared against the calculated values of the models. As demonstrated by the results, a better spray performance can be achieved by the blended fuel than diesel and hydrogenated catalytic biodiesel. In respect of spray penetration, there is almost no difference among the three fuels under the ambient temperature of 323 K. Nevertheless, the blended fuel is lower than that of hydrogenated catalytic biodiesel and diesel when the ambient temperature is 434 K and 523 K. Moreover, the blended fuel is the first to reach the stable state, and the hydrogenated catalytic biodiesel is earlier than diesel for the spray penetration. Meanwhile, the spray model is identified as suitable for the blended fuel.

Highlights

  • With the increasingly severe environmental problems and more stringent vehicle emission regulations, energy-efficient and low-emission internal combustion engines have attracted a great deal of attention in the most recent years

  • In order to achieve high efficiency and low emission for internal combustion engines, it has prompted many researchers to develop a variety of novel combustion modes such as homogeneous compression ignition (HCCI) [1, 2], premixed compression ignition (PCCI) [3, 4], partial premixed compression ignition (PPC) [5, 6], reactive controlled compression ignition (RCCI) [7], and gasoline compression ignition (GCI) [8, 9]

  • The observations can be summarized as follows: (1) G70H30 has been successfully applied to the highpressure common rail system, and the wall impingement phenomenon will not occur in a smallbore engine

Read more

Summary

Introduction

With the increasingly severe environmental problems and more stringent vehicle emission regulations, energy-efficient and low-emission internal combustion engines have attracted a great deal of attention in the most recent years. In order to achieve high efficiency and low emission for internal combustion engines, it has prompted many researchers to develop a variety of novel combustion modes such as homogeneous compression ignition (HCCI) [1, 2], premixed compression ignition (PCCI) [3, 4], partial premixed compression ignition (PPC) [5, 6], reactive controlled compression ignition (RCCI) [7], and gasoline compression ignition (GCI) [8, 9]. Compared with the conventional engine technologies, it took advantage of the high octane number and volatility of gasoline to achieve full mixing of fuel before ignition, which could achieve excellent combustion performance and low pollution emission [6, 10]. It is possible to rely on fuel design to realize GCI combustion mode

Objectives
Methods
Results
Conclusion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call