id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
alkej-485	Chaichan, Miqdam T.; Abass, Qahtan A.	دراسة ملوثات NOx لمحرك اشتعال بالشرارة يعمل بأنواع مختلفة من الوقود الهيدروكاربوني والهيدروجين	2010	10	.pdf	application/pdf	4417	194	51	Continued research is needed to provide more light on their suitability as engine fuels and understand better the roles of the many factors that control their behavior so as to achieve in practice the many potential superior benefits associated with their applications as engine fuels. With hydrogen as engine fuel, changing spark timing from the optimum timing cause abnormal combustion, so the work will be limited with optimum timing, except for very lean equivalence ratios less than Ø =0.7, retarding spark timing appears its usual effect.	cache/alkej-485.pdf	txt/alkej-485.txt