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本文主要总结了三轮摩托车的技术特征,通过对精调化油器方案和后处理装置方案的对比分析,描述了电控化油器的系统架构,并完成了电控单元的硬件框架设计及控制策略软件设计,进而进行样车的国Ⅲ排放实验,实验结果证明,电控化油器可以有效地控制尾气排放,并达到国Ⅲ要求。 相似文献
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一 前言 本文根据无动件液压元件的工作特性设计了一种新型的液压元件,并将其应用到发动机的化油器系统中去,其目的是使传统的化油器结构简化,并从节能角度改虑,提高原有的工作性能和提高发动机的工作效率。本文设计的无动作液压元件与一般的液压元件有所不同,其优点是整个元件在工作时无可动部分;所构成的化油器系统与传统的化油器系统相比较,具有结构简单、工作性能良好的特点。本文设计的一套化油器系统结构,曾经过台架测试和实际的装车使用,其中有些指标已超过传统化油器的性能。 相似文献
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本文阐述了电控摩托车燃油喷射系统方案设计,开发了MicroEMS电控单元,完成了发动机电控豫统的基础标定及调试,进而对电喷摩托车的动力性、经济性和排放情况进行了试验,并与相应的化油器摩托车进行对比分析。 相似文献
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皮连根 《内燃机与动力装置》2009,(3):15-17,22
本文阐述了电控摩托车燃油喷射系统方案设计,开发了Micro EMS电控单元,完成了发动机电控系统的基础标定及调试,进而对电喷摩托车的动力性、经济性和排放情况进行了试验,并与相应的化油器摩托车进行对比分析. 相似文献
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随着汽油机电控技术的不断发展,对发动机ECU进行开发与测试变得越来越困难;目前国际上经常采用发动机实时模拟系统进行ECU初期开发,以提高开发效率。本文介绍一种基于模型和实车数据的电控汽油机实时模拟系统,通过试验与实际应用证明该系统运行可靠,能满足电控系统开发的需要。 相似文献
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针对压电喷油器的实际使用要求和压电驱动器的具体性能参数,基于脉宽调制(PWM)控制方式,采用Adμc841单片机和大功率IGBT开关管设计了压电喷油器的驱动电路。利用MATLAB/SIMULINK对充放电回路的限流电感进行了优化设计,最后对设计的驱动电路进行了试验。试验结果表明,设计的驱动电路可实现对压电喷油器的精确快速控制;当压电喷油器内压电驱动器等效电容为7μF时,驱动电路的充放电时间均小于0.1ms,最大驱动电压可达200V,并且喷油器可实现最小间隔0.2ms的多次喷射。 相似文献
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基于压电陶瓷的逆压电效应,设计了一种直接作用常闭式压电喷油器结构,并建立了压电喷油器的数学模型,验证了模型的准确性.利用仿真模型分析了喷油器关键结构参数对针阀升程、喷油率等特性的影响.研究结果表明:进、出油孔孔径选择应合适,以便产生理想的先缓后急的喷油规律;控制腔容积应取较小值,以提高喷油器的响应速度;针阀弹簧预紧力的大小应和喷油器的响应时间相匹配. 相似文献
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基于压电材料的性能,设计了并联多层的压电电源结构,试验验证了压电材料产生电能的性能,并进行了稳压电路设计。结果表明,采用并联多层方式设计的压电电源结合桥式整流电路对存贮电容进行二次充电,可降低压电材料产生的电压,提高压电材料产生的电流及其能量转移效率,进而提升存贮电容电压,稳压后可作为某些电路的电源使用。 相似文献
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Abstract Abstract Parasitic harvesting of energy from environment is being investigated as a possible solution for powering electronic devices. One possible solution is to harvest energy generated from human walking, by placing a piezoelectric elements inside footwear. As the amount of available energy is extremely low, conversion effectiveness is of prime importance. This paper deals with a micropower source, designed to harvest energy from walking, built in a form of a shoe insole containing a piezoelectric material (43?μm thick polyethylene foil). Laboratory investigation of the piezoelectric properties is presented first, followed by a measurement result of an actual generator with 0·6?μW output power. Finally, a modification of the generator, by adding springy elements, is presented, resulting in ninefold increase in power output (to 5·6?μW). 相似文献
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Previous studies have shown that the amplitude of the vibration of a piezoelectric (PZT) device produces an oscillating flow that changes the chamber volume along with a curvature variation of the diaphragm. In this study, an actuating micro-diaphragm with piezoelectric effects is utilized as an air-flow channel in proton exchange membrane fuel cell (PEMFC) systems, called PZT-PEMFC. This newly designed gas pump, with a piezoelectric actuation structure, can feed air into the system of an air-breathing PEMFC. When the actuator moves outward to increase the cathode channel volume, the air is sucked into the chamber; moving inward decreases the channel's volume and thereby compresses air into the catalyst layer and enhancing the chemical reaction. The air-standard PZT-PEMFC cycle is proposed to describe an air-breathing PZT-PEMFC. A novel design for PZT-PEMFCs has been proposed and a three-dimensional, transitional model has been successfully built to account for its major phenomena and performance. Moreover, at high frequencies, PZT actuation leads to a more stable current output, more drained water, higher sucked air, higher hydrogen consumption, and also overcomes concentration losses. 相似文献
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Zhengzhong Mao Yi Sun Yong Zhang Xiangrong Ren Zhufan Lin Shaoan Cheng 《International Journal of Hydrogen Energy》2021,46(4):3045-3055
Microbial electrosynthesis of methane holds great promise for renewable energy storage, but its present methane production performance requires to be much improved. In this work, three electrochemical methods including galvanostatic (GS), applying constant voltage (ACV), potentiostatic (PS) were used to investigate the effect of the start-up process on the performance of biocathode. The methanogenic biocathodes for CO2 reduction were evaluated based on the kinetics, performance, morphology, and microbial community. The methane production rate of the ACV biocathode was 145% and 238% higher than that of the GS and PS, respectively. The EIS analysis indicated that the high performance of ACV biocathode was mainly due to its much low charge transfer resistance, which was only 45% of the PS and 71% of the GS. Our study concluded that enough reducing equivalents (e? or H2) are more significant for the enrichment of high-performance methanogenic biofilms than changing the potential-dependent microbial community. 相似文献