Impact of Hydrogen Mixture on Fuel Consumption and Exhaust Gas Emissions in a Truck with Direct-Injection Diesel Engine

Muxi Wang, Akira Matsugi, Yoshinori Kondo, Yosuke Sakamoto () and Yoshizumi Kajii ()
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Muxi Wang: Graduate School of Global Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
Akira Matsugi: National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba 305-8569, Japan
Yoshinori Kondo: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
Yosuke Sakamoto: Graduate School of Global Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
Yoshizumi Kajii: Graduate School of Global Environmental Studies, Kyoto University, Kyoto 606-8501, Japan

Energies, 2023, vol. 16, issue 11, 1-12

Abstract: Hydrogen addition affects the composition of exhaust gases in vehicles. However, the effects of hydrogen addition to compression ignition engines in running vehicles have not been evaluated. Hydrogen-mixed air was introduced into the air intake of a truck equipped with a direct-injection diesel engine and running on a chassis dynamometer to investigate the effect of hydrogen addition on fuel consumption and exhaust gas components. The reduction in diesel consumption and the increase in hydrogen energy share (HES) showed almost linear dependence, where the percentage decrease in diesel consumption is approximately 0.6 × HES. The percentage reduction of CO 2 showed a one-to-one relationship to the reduction in diesel consumption. The reduction in emissions of CO, PM, and hydrocarbons (except for ethylene) had one to one or a larger correlation with the reduction of diesel consumption. On the other hand, it was observed that NO x emissions increased, and the percentage increase of NO x was 1.5~2.0 times that of HES. The requirement for total energy supply was more when hydrogen was added than for diesel alone. In the actual running mode, only 50% of the energy of added hydrogen was used to power the truck. As no adjustments were made to the engine in this experiment, a possible disadvantage that could be improved by adjusting the combustion conditions.

Keywords: hydrogen; diesel; dual-fuel; exhaust gas components; fuel consumption (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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