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Summary and Progress of the Hydrogen ICE Truck Development Project

Published June 15, 2009 by SAE International in United States
Summary and Progress of the Hydrogen ICE Truck Development Project
Citation: Kawamura, A., Yanai, T., Sato, Y., Naganuma, K. et al., "Summary and Progress of the Hydrogen ICE Truck Development Project," SAE Int. J. Commer. Veh. 2(1):110-117, 2009,
Language: English


A development project for a hydrogen internal combustion engine (ICE) system for trucks supporting Japanese freightage has been promoted as a candidate for use in future vehicles that meet ultra-low emission and anti-global warming targets. This project aims to develop a hydrogen ICE truck that can handle the same freight as existing trucks. The core development technologies for this project are a direct-injection (DI) hydrogen ICE system and a liquid hydrogen tank system which has a liquid hydrogen pump built-in. In the first phase of the project, efforts were made to develop the DI hydrogen ICE system.
Over the past three years, the following results have been obtained:
  • A high-pressure hydrogen gas direct injector developed for this project was applied to a single-cylinder hydrogen ICE and the indicated mean effective pressure (IMEP) corresponding to a power output of 147 kW in a 6-cylinder hydrogen ICE was confirmed. In addition, nitrogen oxide (NOx) was reduced with a high thermal efficiency by the optimization of the EGR ratio, the injection timing and the ignition timing. From these results, a DI multi-cylinder hydrogen ICE using this injector was concluded to be highly feasible.
  • A NOx storage-reduction (NSR) catalyst system was applied to the hydrogen ICE. We confirmed that the NOx conversion rate was high and the fuel penalty was low under the limited conditions.