On the basis of looking up domestic and foreign literatures and consulting the facts of repairing factory , with 495t diesel engine machine as the study object and the fuel delivery advance angle as the study factor , this thesis has probed into the effect of the deviation of fuel delivery advance angle in each cylinder on exhaust and other performance of engine 本文在查阅国内外文献及参考修理厂实际情况的基础上，以修理后的495t直喷式柴油机为研究对象，以供油提前角为研究因素，探讨发动机各缸的供油提前角偏差情况对排放及其它性能的影响。
The system has following functions : showing indicator diagram , the mean value of maximum pressure , maximum pressure raise rate and rotating speed , the distribution of maximum pressure , maximum pressure raise rate and ignition advance angles , the speed fluctuation in cycle , speed fluctuation between cycle and ignition advance angles 本系统可以完成如下的工作：测量摩托车发动机的平均示功图；平均最大压力上升率；平均最高压力；平均转速；点火提前角；最大压力分布；最大压力上升率分布；点火提前角分布；循环内转速波动；循环间转速波动等。
Based on the analysis of the combustion in cylinder , the thorough research of multiparameters ( engine speed , load , ignition timing , injection timing , injection nozzle type , compression , ignition pattern etc . ) on methanol engine combustion cyclic variations is made on a 1130 single - cylinder diesel engine fueled with methanol 在燃用甲醇燃料的1130单缸柴油机上，通过缸内燃烧分析，对影响甲醇发动机循环变动的各种因素(转速、负荷、点火提前角、喷油提前角、喷油嘴类型、压缩比、点火方式等)进行了详细的研究。
The results of study show that the transmitting speed of flame is slower and the combustion duration is longer than gasoline . the combustion status of lpg is improved , but the problem of long combustion duration also exists when speed and load are increased . it is useful to adjust ignition timing , but nox emission increase 通过研究认识到： lpg燃烧时火焰传播速度比汽油慢，燃烧持续期比汽油长；随着转速和负荷的增大， lpg燃烧状况得到改善，但仍出现后燃期长，热量利用不充分等问题；点火提前角的调整有利于lpg的燃烧，但使nox排放升高。
Under this background , we successfully developed an engine fuelled with coal - bed gas and ignited by spark plug . the measurements for the prototype engine were thoroughly made , including the cylinder pressure , the rate of heat release , combustion duration , ignition delays , spark ignition angle , and the fluctuation of the cylinder maximum pressure 在此背景下，本文对经由s195柴油机改装得到的燃用变组分煤层气发动机进行了全面的测试和分析，包括缸内示功图、燃烧放热率、主燃期、点火提前角、火焰发展期以及最大压力循环波动等。
Firstly , based on the analysis of the principle of the capacitor discharge ignition system in the gasline engine and the characteristics of ignition parameters in the gasline engine , the author proposes the methods of ignition parameters measurement , including the speed of the gasline engine , ignition advance angle , ignition voltage , ignition current and igniton energy 首先，在认真分析汽油机电容放电点火系统的工作原理及其点火参数的特性的基础上，提出了汽油机转速、点火提前角、点火电压、点火电流和点火能量的测量方法。
A new method is put forward on thermodynamics combustion model to make imitating research on egr - a software is made to calculate the amount of no from the gasoline by connecting with the practical condition in our country , starting with thermodynamics and experiment at the same time make a system research to influence by the exhaust gas returning system on the gasoline , such as exhaust gas , fuel economy , and power , finally a new thought is afforded for optimizing all the egr parameter in chapter 6 第五章采用上述诊断和预测模型对bj492q发动机进行了模拟计算和实验研究，并探讨了点火提前角、残余废气系数、燃空比、压缩比和火花塞位置对发动机性能的影响。第六章提出了基于热力学燃烧模型对egr进行数值模拟的方法，系统地研究了车用汽油机加装egr系统后对排放、油耗、功率的影响，并结合排放标准。提出了egr参数的全局优化的新思路。
5 . no parts and components warranty will be delivered if customer or non - warranty - taker dismantles disassemble and adjusts parts , assembly of the diesel and components that are not allowed to be adjusted such as injection pump assembly lead sealing , and reassembles them within the warranty term , which however , fails to meet technology demand such as torque and advance angle of major bolts , resulting in failure and damage of relevant components , assembly and parts 在保修期内，顾客或非承担保修者拆卸解体调整柴油机的部件总成和规定不得调整的部位如喷油泵总成铅封等，重装后又未达到技术要求如重要螺钉的扭矩喷油提前角等，导致部件总成和相关联零部件失效和损坏，由此涉及的零部件
The lpg - fueled engine is modified and optimized using electronic controlled fuel injection technology ; the comparison of engine performance with direct injection , intake liquid injection and gas injection has been done . the air fuel ratio , ignition timing and injection timing of the engine has been optimized and calibrated 本文利用电控喷射技术对lpg发动机进行改造和优化，对比研究缸内直接喷射、进气道液态喷射和气态喷射的发动机性能，并对空燃比、点火提前角和喷射时刻等控制参数进行优化和标定。
2 the load characteristics tests and exhaust emissions measurements of the engine are done at the original fuel delivery advanced angle and modified fuel delivery advanced angles when run on pure dme and different fuel blends consisting of predominant dme and some diesel fuel in the diesel engine stage experiments 2在柴油机台架实验中，进行了燃烧纯二甲醚以及不同比例的二甲醚和柴油的二元混合燃料模式的燃烧实验，完成了在原机供油提前角、改造后的供油提前角下的负荷特性实验和排放指标的测定。
