In this study, the influence air fuel ratio and injection timing on the engine performance of 4-cylinder direct injection hydrogen fueled engine was investigated. The effect of air fuel ratio (AFR) and engine speed on optimum injection timing is presented. The 4-cylinder direct injection hydrogen engine model was developed utilizing the GTPower commercial software. This model employed one dimen...

The absolute heat capacity of a matrix-free polystyrene grafted silica nanocomposite system is investigated using ultrafast Flash differential scanning calorimetry (Flash DSC) and compared to results for neat sample similar molecular weight. the polymer in 8% lower than that polystyrene. In addition, step change at glass transition Tg 15% lower, indicating 2 nm-thick immobile layer around nanop...

Prevention is of paramount importance in tunnel engineering, especially operation tunnel. In this study, the deformation data Suzhou Metro Line 1 are used to evaluate health shield during operation. Firstly, relationship between effective ratio bending rigidity and analyzed, results show that has a negative power with deformation, conversion from realized corresponding risk classification crite...