Nowadays, the major challenge of diesel engines development is simultaneous nitrogen oxides and soot emissions reduction without the thermal efficiency drop. Hence, different combustion concepts should be investigated to reach optimum emission and performance conditions in diesel engines without expensive aftertreatment systems. This paper presents the results of a study on a dual fuel (DF) eng...

Vegetable oils are renewable in nature and can be directly used as fuels in diesel engines. However, their high viscosity and poor volatility lead to reduced thermal efficiency and increased hydrocarbon, carbon monoxide and smoke emissions. Transesterification is one of the methods by which viscosity could be drastically reduced and the fuel could be adopted for use in diesel engine. This Ester...

Free-piston engines are under investigation by a number of research groups worldwide due to their potential advantages in terms of fuel efficiency and engine emissions. Some prototypes have emerged, mainly aimed for vehicle propulsion, and have reported favourable performance compared to conventional technology. This paper describes the design of a modular compression ignition free-piston engin...

Alcohols have been used as a fuel for engines since 19th century. Among the various alcohols, ethanol and methanol are known as the most suited renewable, bio-based and ecofriendly fuel for spark-ignition (SI) engines. The most attractive properties of ethanol and methanol as an SI engine fuel are that it can be produced from renewable energy sources such as sugar, cane, cassava, many types ...

An experimental investigation is carried out to establish the performance and emission characteristics of a compression ignition engine while using cerium oxide nanoparticles as additive in neat diesel and diesel-biodiesel-ethanol blends. In the first phase of the experiments, stability of neat diesel and diesel-biodiesel-ethanol fuel blends with the addition of cerium oxide nanoparticles are a...

It is necessary to find a fuel source due to the heavy usage of natural resources. Developing countries have been trying various sources and methods to identify suitable alternative fuel for engines. This paper presents the utilization of Palm Oil Methyl Ester (POME) blends with diesel in Variable Compression Ratio (VCR) diesel engine. The performance and emission characteristics of biodiesel w...

This paper proposes a code compression technique called operand factorization. The key idea of operand factorization is the separation of program expression trees into sequences of tree-patterns (opcodes) and operand-patterns (registers and immediates). Using operand factorization we show that tree and operand patterns have exponential frequency distributions. A set of experiments is performed ...

This paper proposes a code compression technique called operand factorization. The key idea of operand factorization is the separation of program expression trees into sequences of tree-patterns (opcodes) and operand-patterns (registers and immediates). Using operand factorization we show that tree and operand patterns have exponential frequency distributions. A set of experiments is performed ...