Development of the on-demand fuel injection system for a light truck using the hydrogen enriched compressed natural gas (HCNG) fuel

摘要

The use of hydrogen as a fuel by mixing with a commercial fuel has recently been investigated continuouslyin order to solve the energy crisis and global warming. This article presents the results of the design andexperimentation for the use of the hydrogen enriched compressed natural gas or HCNG as a fuel. Theprototype vehicle a light truck equipped with a 1809 cc. gasoline engine. The proposed system is a mixingsystem where the compressed natural gas and the hydrogen are stored on-board and controlled separately.They are mixed as they are injected into the intake manifold right before the intake-port (Port Injection). Thehydrogen supply system used in this investigation is adopted from the common system used for compressednatural gas system. The mixing ratio (%H in the total volume of HCNG) ranges from 5% to 20% by volume.The performance testing is done through the Chassis Dynamometer. The results show that the power and thetorque of the engine drops when using either CNG or HCNG as compared to the gasoline fuel. However,when compared to the case when using the CNG, the 10% addition of hydrogen can increase theperformance by 1%. The performance, on the other hands, is reduced for other amount of hydrogenadditions.