Mo H.,Shanghai JiaoTong University |
Mo H.,Guanxi University |
Huang Y.,Guangxi Yuchai Machinery Co. |
Mao X.,Shanghai JiaoTong University |
Zhuo B.,Shanghai JiaoTong University
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering | Year: 2014
In this paper, the deactivation of diesel engines used in road vehicles was studied because it changes the progress of combustion, which might be advantageous to the economy of engines. Based on a one-dimensional simulation and an experimental study of a supercharged diesel engine which deactivates half the cylinders at light loads and idle, this paper presents results which show that, when the mean effective pressure of the engine is lower than 3.5 bar, cylinder deactivation decreases the brake specific fuel consumption by 0-17% and by 26% at idle if the intake valves and the exhaust valves are kept closed at the same time. However, the engine and the supercharger do not match well after deactivation and the mass of intake air decreased greatly, which also resulted in a large decrease in the nitrogen oxide emissions. © IMechE 2013.
Lin Z.,Guanxi University |
Lin Z.,Fujian Agriculture and forestry University |
Wei J.,Guanxi University |
Wei J.,Fujian Agriculture and forestry University |
And 11 more authors.
Plant Disease | Year: 2015
Sugarcane twisted leaf disease, caused by Phoma sp., was first reported in Guangxi, China, in 2012, when more than 5% of sugarcane was infected in the field. Three single-spore isolates were recovered from symptomatic leaves. Sequences from five fungal loci, 28S nrDNA (LSU), 18S nrDNA (SSU), the internal transcribed spacer regions 1 and 2 and 5.8S nrDNA (ITS), β-tubulin (TUB), and the translation elongation factor alpha (TEF-α) were amplified from the disease-associated isolates. The twisted leaf disease pathogen was identified and formally described as Phoma sorghina var. saccharum through phylogenetic analyses, morphological observations, and the pathogenicity of the isolates on sugarcane. P. sorghina var. saccharum can be differentiated from related species based on the morphology of pycnidia and chlamydospores that formed regular, glabrous, papillate ostioles. Chlamydospore- anamorph was unicellular, botryoid-alternarioid shape, as well as the binucleate, frequently branched hyphae. We also showed that mycelial growth of P. sorghina var. saccharum was optimal at pH 4.0 and 20 to 25°C. Additionally, among 13 chemical compounds tested, carbendazim was found to be the most effective in suppressing the radial growth of the fungus. Mycelial growth in vitro was completely inhibited at concentrations of 100 and 50 ppm, and 87.6% of mycelial growth was inhibited at 10 ppm. Carbendazim is therefore a potentially effective fungicide to control this disease in China. © 2015 The American Phytopathological Society