Technological and environmental advantages of a new engine combustion mode: Dual Biofuel Intelligent Charge Compression Ignition

Abstract

• The technological and environmental advantages of ICCI mode in engine efficiency increment and pollutants emission reduction were assessed. • Depending on the flexible and reliable reactivity gradient in the cylinder of ICCI mode, the thermal efficiency of more than 50% and NO x emissions of meeting Euro VI standard are possible. • The emission and absorption of CO 2 under ICCI combustion technology could achieve balance. • Dual-biofuel ICCI mode has the ability to achieve carbon neutrality and mitigate greenhouse effect. With the rapid development of the world economy, the demand for energy will inevitably increase the resource shortage and environmental pollution problems. Therefore, the coordinated development of energy and environment is an important way to achieve the United Nations (UN) Sustainable Development Goals (SDGs). Here, the dual biofuel intelligent charge compression ignition (ICCI) mode fuelled with butanol and biodiesel was demonstrated to achieve a high-efficiency and ultra-low emissions, which will have global real-world energy influence. The maximum thermal efficiency of the butanol/biodiesel ICCI mode is 3.5% higher than the absolute efficiency of the conventional mode, and the nitrogen oxide emissions decreased by 76.69% to 99.47%. The butanol/biodiesel ICCI mode has the potential to achieve carbon neutrality in the road transport sector and mitigate the greenhouse effect. Hence, direct air pollutants would be eliminated. Meanwhile, with the increasing production of biofuels worldwide, this work not only improves the environmental pollution and relieves the energy crisis, but also provides a method to deal with the mutual restraint between energy, environmental and technology.