to extremely low values. One efficient method to control NOx in order to achieve future emissions limits is the use of … soot emissions. The method is based on the reduction of gas temperature level and O2 availability inside the combustion … chamber, but unfortunately it has usually an adverse effect on soot emissions and brake specific fuel consumption (bsfc). The …

An evaluation was performed on the efficiency and emissions from an engine fuelled with compressed natural gas (CNG …) and a mixture of natural gas and hydrogen, respectively. The mixtures of CNG and hydrogen were named HCNG. …

emission norms and rapid depletion of petroleum resources there has been a continuous effort to use alternative fuels. Hydrogen … is one of the best alternatives for conventional fuels. Hydrogen has its own benefits and limitations in its use as a …

As hydrogen fuel cell vehicles move from manifestation to commercialization, the users expect safe, convenient and … customer-friendly fuelling. Hydrogen quality affects fuel cell stack performance and lifetime, as well as other factors such as … valve operation. In this paper, previous researcher's development on hydrogen as a possible major fuel of the future has …

performance at low load conditions. This paper experimentally investigated the co-effect of cylinder cutoff and hydrogen addition … engine equipped with an electronically controlled hydrogen injection system and a hybrid electronic control unit. The engine …, respectively. For each cylinder closing strategy, the hydrogen energy fraction in the total fuel (βH2) was increased from 0% to …

. HC emissions were reduced whereas NOx emissions were raised with the increase of hydrogen and hydroxygen addition levels …This paper compared the effects of hydrogen and hydrogen–oxygen blends (hydroxygen) additions on the performance of a … engine equipped with a hydrogen and oxygen injection system. A hybrid electronic control unit was applied to adjust the …

in the intake of 0 and 3% were adopted to investigate the effect of hydrogen addition on combustion and emissions … performance of a hydrogen-blended methanol engine at lean and various load conditions. The test was conducted on a four …-cylinder commercial spark-ignition engine equipped with an electronically controlled hydrogen port injection system. The test was …

The performance of a hydrogen-blended gasoline engine at lean and the wide open throttle conditions was investigated. A … hydrogen port-injection system was adopted to introduce the hydrogen into each cylinder. The engine was operated at 1400rpm and … two hydrogen blending levels of 0% and 3%. The excess air ratio was raised from 1.00 to about 1.45 for a given hydrogen …

engines. These studies showed that this fuel is good gas oil substitute but an increase in the nitrogenous oxides emissions … diesel engine. The tests were carried out in three sections. Firstly, the measured performance and exhaust emissions of the … emissions including nitrogenous oxides (NOx), carbon monoxide (CO), unburned hydrocarbons (HC) and exhaust gas temperatures …

high-speed direct injection (HSDI) diesel engines. However EGR has different effects on combustion and emissions production … lift-off length, etc.), and thus the influence of EGR on NOx and particulate matter (PM) emissions is not perfectly …/PM emissions. The increase of inlet temperature with EGR has contrary effects on combustion and emissions, thus sometimes giving …