纯变性乙醇燃料发动机的初步研究

详细分析了T乙醇燃料的物化特点,介绍了以某型号柴油机为基础改装成纯乙醇自然吸气式发动机的设计方案,并对其进行了初步的试验研究。     

我国生物柴油的发展状况及产业化前景

介绍生物柴油的性能优势、我国及国外生物柴油的发展状况以及我国生物柴油的产业化前景。     

客车供暖系统

介绍客车燃油液体加热器的特点、供暖量的计算及管路的连接方法。     

我国与欧洲汽车燃油箱标准及检验方法的对比分析

通过对我国与欧洲汽车燃油箱标准的对比,提出达到欧洲燃油箱标准的途径与检验方法。     

Physical-chemical properties of ethanol-diesel blend fuel and its effect on the performance and emissions of a turbocharged diesel engine

This paper deals with the main physical-chemical properties of ethanol-diesel blend and the effects of ethanoldiesel blends (up to 15% volume) on engine performance (full load torque vs. engine speed, BSEC vs. torque at 1400 r/min and 2300 r/min, and effect of start of injection angle) and emissions in ECE R49 tests (steady 13 points) using a 6.6 L inline 6-cylinder turbocharged direct injection diesel engine. The results show that an increase in ethanol fraction results in decreased viscosity of the blend fuel and very high distillation characteristics in the low temperature range. Solvents can improve the solubility of ethanol-diesel blends. The engine power was degraded proportional to the ethanol content (10% and 15%) due to the LHV (low heating value) of the blends. The higher latent heat of vaporization and lower CN (cetane number) of ethanol, which results from the steady state emissions of CO, HC, and SOF (soluble organic fraction), were much higher in the ECE R49 tests at low loads. Soot (solid mass) emissions were improved. The particulate matter emissions were significantly increased with higher blend volumes, and NOx emissions slightly increased with higher ethanol volumes. By increasing the injection angle properly, the performance parameters of the diesel engine were improved, but NOx emissions were deteriorated slightly.     

Optimal energy management for a complex hybrid electric vehicle: Tolerating power-loss of motor

The energy management may perform well under normal conditions, but may lead to poor behavior under abnormal situations. To tackle this problem, an optimal control strategy called rule-based equivalent fuel consumption minimization strategy (RECMS) is developed for a new complex hybrid electric vehicle (CHEV).It optimizes the energy efficiency and drive performance to cater for normal and power-loss operations of the tractive motor. Firstly, the strategy formulates a novel objective function based on the equivalent fuel concept.By accounting for the actual fuel cost, the equivalent fuel cost for the electric machines and virtual fuel cost for the drivability, the cost function is obtained. Furthermore, some penalty factors are presented to optimize the performance target. Finally, experiments for a practical CHEV are performed to validate a simulation model.Then simulations are carried out for both rule-based and RECMS. The results show that the optimal energy management is working well.     

生物柴油特性分析与应用

生产生物柴油的主要原料是可再生的生物资源,生物柴油含氧而基本不含硫和芳香烃,具有良好的燃料品质和环境友好性.从能源战略角度分析,生物柴油是最为重要的代用燃料之一,柴油机不需改动即可使用生物柴油.柴油机使用生物柴油不仅利于改善燃料结构,而且可以降低有害物排放.     

Nonlinear Predictive Control for PEMFC Stack Operation Temperature

Operating temperature of proton exchange membrane fuel ceil stack should be controlled within a special range. The input-output data and operating experiences were used to establish a PEMFC stack model and operating temperature control system. A nonlinear predictive control algorithm based on fuzzy model was presented for a family of complex system with severe nonlinearity such as PEMFC. Based on the obtained fuzzy model, a discrete optimization of the control action was carried out according to the principle of Branch and Bound method. The test results demonstrate the effectiveness and advantage of this approach.     

某型汽轮燃(滑)油泵液压速关系统的改进

分析了现有节流垫片对某型汽轮燃(滑)油泵液压速关系统修后调试工作量的影响,指出其结构设计存在需要改进的地方;提出了用可调节的阀取代传统节流垫片的方案,可有效减少调试的人力物力。     

基于ARM和μC/OS-II的船用柴油机最低油耗航速控制系统设计与实现

介绍一种船舶柴油机最低油耗航速控制系统.利用这套系统可以在不影响船舶航行安全和航运周期的前提下,通过实时检测的方式,控制主机运行于最低油耗航速,从而大大降低船舶航行时的主机燃油消耗.