共查询到20条相似文献,搜索用时 116 毫秒
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YC6112ZQ-231型柴油机是在美国康明斯系列柴油机基础上开发出来的新产品,本文着重介绍了此种机型的开发过程。 相似文献
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112缸径柴油机有YC6112和YC4112两大系列,均为直列、水冷、四行程和直接喷射燃烧室。吸气方式除YC4112T型柴油机为自燃吸气式外,其余型号均为增压式。112缸径柴油机为广西玉柴机器股份有限公司生产。 相似文献
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作者对YC6112柴油机冷磨合时窜机油问题进行多方面的试验分析,找出了问题症结所在,并解决窜油现象。 相似文献
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YC6112ZLQM型电控稀薄燃烧CNG单燃料发动机开发研究 总被引:1,自引:0,他引:1
以YC6112ZLQ增压中冷柴油机为基础,对有关零部件进行了结构改进设计,开发出YC6112电控稀薄燃烧CNG单燃料发动机。通过大量的匹配与优化试验,完成了发动机运行所需软硬件的开发和标定工作。验证试验证明:所开发的CNG单燃料发动机,动力性和经济性完全达到了设计指标的要求,排放达到了欧Ⅱ标准。填补了我国大型公交车用高档CNG单燃料发动机的空白。 相似文献
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《柴油机》2000,(3)
1999年10月,国家环保总局、国家机械工业局、北京市环保局共同对玉柴机器股份有限公司开发生产的YC6112ZLQ、YC6105QC、YC6108ZQ系列柴油机进行了检测认定。检测结果表明,各项排放指标均低于欧洲Ⅰ号技术法规规定的限值,且在油耗、加速性、可靠性方面优于原进口机型,成为我国首次采用新的排放标准认证的绿色环保动力机器。其中,6112型柴油机排放指标全部达到甚至优于新的国家标准。例如:CO为1.06g/kWh,低于国标的4.5g/kWh;HC为0.45g/kWh,低于国标1.1g/kWh;颗粒排放为0.24g/kWh,低于国标0.36g/kWh。由于玉柴加大了投资… 相似文献
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柴油机喷油系统工作过程模拟计算研究进展 总被引:3,自引:0,他引:3
柴油机喷油过程模拟计算的主要内容是对高压油管内燃油流动过程的模拟。本文从燃油在高压油管内流动的数学模型和针对数学模型所用的计算方法两方面对柴油机喷油过程模拟的进展进行了总结和回顾 ,指出三方程模型和改进的二方程模型宜于使用 ,特征线法仍会得到应用而且有限容积法将会占有越来越重要的地位 相似文献
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柴油机喷油过程模拟计算的主要内容是对高压油管内燃油流动过程的模拟.本文从燃油在高压油管内流动的数学模型和针对数学模型所用的计算方法两方面对柴油机喷油过程模拟的进展进行了总结和回顾,指出三方程模型和改进的二方程模型宜于使用,特征线法仍会得到应用而且有限容积法将会占有越来越重要的地位. 相似文献
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This paper presents a novel turbocharging system applied to four‐stroke diesel engines, which is named modular multi‐purpose pulse converter (MMPC) turbocharging system. Two‐dimensional steady flow simulations of the MMPC turbocharging system are performed with STAR‐CD code. A one‐dimensional unsteady flow simulation code finite volume method and total variation diminishing (FVM–TVD) has been developed. Using FVM–TVD, flow predictions in the diesel engine 8L250Z are carried out in the unsteady state with the mixed pulse converter (MIXPC) turbocharging system and MMPC, respectively. It is found that the MMPC system is more capable of reducing flow interference and has less variation of the scavenging coefficients for all cylinders than the MIXPC system. To validate the prediction results, experiments of the diesel engine 8L250Z equipped with the pulse converter (PC) turbocharging system, the MIXPC and the MMPC turbocharging systems are carried out. Experimental results show that the MMPC makes exhaust gas temperature lower before turbine and at each cylinder head face than the PC and the MIXPC. A diesel engine 20VPA6BSTC was simulated on series adaptability of the MMPC system. The simulation results reveal that the MMPC turbocharging system could be applied to four‐stroke high‐power diesel engines that may have any number of cylinders and different firing orders. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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B. Rajendra Prasath P. Tamilporai Mohd.F. Shabir 《International Journal of Thermal Sciences》2010,49(12):2483-2490
A comprehensive cycle simulation program has been developed using “C” language for conventional engine and Low Heat Rejection (LHR) engine operated with diesel and biodiesel. Model for the prediction of cylinder pressure, heat transfer, heat release, work done and emission levels were synthesized and analyzed. Annand’s combined heat transfer model and Wiebe’s heat release model is used to calculate the heat transfer and heat release. The extended Zeldovich mechanism is used for predicting NO emissions. The models have been validated against experimental data obtained from single cylinder water-cooled DI diesel engine. For experimental purpose the diesel engine is converted in to LHR engine using partially stabilized zirconia coating and biodiesel is produced from Jatropha seed oil (JSO) through transesterification process. It is shown that the models can predict the characteristics with reasonable accuracy. 相似文献
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用等效热力系统法求解涡流室柴油机燃烧放热率的计算模型 总被引:7,自引:1,他引:7
就涡流室式柴油机燃烧放热率理论模型及其算法问题,提出了严谨的等效热力系统物理模型及其等效原则,以及完整的燃烧放热率计算模型,解决了主、副燃烧室间连接通道处流量系数瞬态值的计算问题。通过对S195涡流室式柴油机燃烧放热率的计算,揭示出瞬态流量系数随曲轴转角的变化规律及其回归关系,以及主、副燃烧室各自的燃烧形态和燃烧放热率。该种模型可进一步提高涡流室式柴油机燃烧放热率的计算精度。 相似文献
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