%0 Journal Article %T Effect of Ignition Timing and Hydrogen Fraction in Natural Gas Blend on Performance and Exhaust Emissions in a DI Engine %A Zareei, JAVAD %A Rohani, Abbas %A Wan Mohd Faizal Bin Wan Mahmood %A Shahrir Abdullah %J Iranian Journal of Science and Technology-Transactions of Mechanical Engineering %@ 2228-6187 %D 2019