Controlling backfire for a hydrogen-fueled engine using external mixture injection

被引：18

作者：

School of Mechanical Engineering, Sungkyunkwan University, Jangan-gu, Suwon 440-746, Korea, Republic of ^{[1
]}

不详 ^{[2
]}

机构：

[1] School of Mechanical Engineering, Sungkyunkwan University, Jangan-gu

[2] Department of Mechanical Engineering, Texas A and M University, College Station

来源：

J. Eng. Gas Turbines Power | 2008年 / 6卷

关键词：

Engine cylinders - Functions - Valves (mechanical) - Efficiency - Hydrogen;

D O I：

10.1115/1.2940353

中图分类号：

学科分类号：

摘要：

The development of a hydrogen-fueled engine using external mixture injection (e.g., using port or manifold fuel injection) with high efficiency and high power is dependent on the control of backfire. This work has developed a method to control backfire by reducing the valve overlap period while maintaining or improving engine performance. For this goal, a single-cylinder hydrogen-fueled research engine with a mechanical continuous variable valve timing system was developed. This facility provides a wide range of valve overlap periods that can be continuously and independently varied during firing operation. By using this research engine, the behavior of backfire occurrence and engine performance are determined as functions of the valve overlap period for fuel-air equivalence ratios between 0.3 and 1.2. The results showed that the developed hydrogen-fueled research engine with the mechanical continuous variable valve timing system has similar performance to a conventional engine with fixed valve timings, and is especially effective in controlling the valve overlap period. Backfire occurrence is reduced with a decrease in the valve overlap period, and is also significantly decreased even under operating conditions with the same volumetric efficiency. These results demonstrate that decreasing the valve overlap period may be one of the methods for controlling backfire in a hydrogen-fueled engine while maintaining or improving performance. Copyright © 2008 by ASME.

引用

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