水素軽油二元燃料ディーゼル機関の研究
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概要
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This paper presents some findings obtained by the running tests of the hydrogen and gas oil dual fuel diesel engines. The experimental work was carried out on the two types of diesel engines: one was the small size, single cylinder, four stroke cycle, pre-combustion chamber diesel engine with the compression ratio of 20:1, the other was the small size, single cylinder, four stroke cycle, swirl chamber diesel engine with the variable compression ratio of 6.8-20.6:1. In these dual fuel engines, the hydrogen was injected into the intake pipe, mixed with the fresh air, compressed and then ignited by the injection of gas oil near the end of compression stroke. The hydrogen and gas oil dual fuel diesel engines run smoothly as the hydrogen-air equivalence ratio was smaller than the values of 0.2-0.3 depending on the running conditions of the engine. But, the preignition began to occur when the hydrogen-air equivalence ratio became larger than the values of 0.2-0.3. The preignition led rough running, poor thermal efficiency and backfiring into the intake pipe of the dual fuel diesel engines. With the objects of controling the preignition and increasing the hydrogen-air equivalence ratio, we tried to inject water near the intake valve in the intake pipe and to lower the temperature of the fresh air by the evaporation heat of water. By the water injection into the intake pipe, the hydrogen-gas oil dual fuel diesel engines could run widely in the hydrogen-air equivalence ratio without the abnormal combustions.
- 独立行政法人 海上技術安全研究所の論文
- 1981-03-31