电控LPG喷射发动机多次点火系统的研究
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摘要
近年来液化石油气(LPG)用作发动机代用燃料已经得到广泛的推广和应用，但同汽油相比，其着火温度高，传播速度慢，一般的汽油机点火系统无法满足要求。针对此问题，本文开发了一套基于微机控制的LPG喷射发动机多次点火系统。经过试验验证，该系统能可靠的实现点火提前角的优化和多次点火，对发动机动力性和排放的改善上也起到了一定的效果。
首先本文对电控LPG喷射发动机多次点火系统作了总体方案研究，相应选择了控制策略，最后在此基础上完成了系统硬件和软件的设计。整个控制系统是以PC机为核心控制单元的。
其次本文又对点火系统驱动电路的各种现有形式进行了分析，确定了电容放电式驱动电路的设计思路。经过多次摸索和试验，完成了点火驱动电路的设计。
最后作者利用本文研制的系统对170F发动机做了验证试验，结果表明：该点火系统能可靠的实现点火时刻的优化和调整多次点火，对发动机排放和动力性的改善起到了较好的作用。
Recently, liquefied petroleum gas (LPG) has been applied widely as engine's alternative fuel. But compared with gasoline, it has higher ignition temperature and lower flame spreading velocity. Normal gasoline engine's ignition system could not meet LPG engine's ignition demand. So, this paper exploited a multiple times ignition system based on PC controlled LPG injection. Through experiment, we found this system can reliably realize the optimization of ignition timing and multiple times ignition. It also has obvious effects on the improvement of LPG engine's performance and emission.
First, this paper studied the overall scheme of electronically controlled LPG injection engine's multiple times ignition system. According to this scheme, the open-loop control strategy was chosen. Then, the hardware and software of this system were designed. The whole system's central control unit is PC.
Secondly, this paper analyzed the formats of ignition system driving circuitry, ensured the design thought of capacitance discharged driving circuitry. After times grope and experimentation, the design of ignition driving circuitry was accomplished.
At last, the author did an experiment on 170F engine with the exploited system. The result indicated: This ignition system can reliably realize the optimization of ignition timing and the adjustment of multiple times ignition. It has a good effect on the improvement of engine's emission and performance.
首先本文对电控LPG喷射发动机多次点火系统作了总体方案研究，相应选择了控制策略，最后在此基础上完成了系统硬件和软件的设计。整个控制系统是以PC机为核心控制单元的。
其次本文又对点火系统驱动电路的各种现有形式进行了分析，确定了电容放电式驱动电路的设计思路。经过多次摸索和试验，完成了点火驱动电路的设计。
最后作者利用本文研制的系统对170F发动机做了验证试验，结果表明：该点火系统能可靠的实现点火时刻的优化和调整多次点火，对发动机排放和动力性的改善起到了较好的作用。
Recently, liquefied petroleum gas (LPG) has been applied widely as engine's alternative fuel. But compared with gasoline, it has higher ignition temperature and lower flame spreading velocity. Normal gasoline engine's ignition system could not meet LPG engine's ignition demand. So, this paper exploited a multiple times ignition system based on PC controlled LPG injection. Through experiment, we found this system can reliably realize the optimization of ignition timing and multiple times ignition. It also has obvious effects on the improvement of LPG engine's performance and emission.
First, this paper studied the overall scheme of electronically controlled LPG injection engine's multiple times ignition system. According to this scheme, the open-loop control strategy was chosen. Then, the hardware and software of this system were designed. The whole system's central control unit is PC.
Secondly, this paper analyzed the formats of ignition system driving circuitry, ensured the design thought of capacitance discharged driving circuitry. After times grope and experimentation, the design of ignition driving circuitry was accomplished.
At last, the author did an experiment on 170F engine with the exploited system. The result indicated: This ignition system can reliably realize the optimization of ignition timing and the adjustment of multiple times ignition. It has a good effect on the improvement of engine's emission and performance.
引文
[1] 史鉴生．《美国天然气汽车加气站标准汇编》．华油天然气股份有限公司．1993．4
[2] 叶东燕，代用燃料和VOLVO卡车集团的观点，山东内燃机，1984．
[3] 罗毅，代用燃料DME及其研究，小型内燃机与摩托车，2001
[4] 贸克斌等．我国汽车排气污染现状与发展．环境科学．96．8
[5] Professor Bargender, Die Alternativebrenstoff---Nature Gas, MTZ. 1999
[6] 邵千钧，点燃式内燃机燃用LPG电控喷射研究，浙江大学硕士学位论文，2000．1
[7] 蔡永立．液化石油气——汽车的新能源．能源季刊(台湾)．24卷第4期(1994．10)
[8] 郭志东，LPG发动机燃料系统的开发动向，客车技术，2001，4
[9] 赵福堂，《汽车电器与电子设备》，北京理工大学出版社，1996
[10] Norman Martin, Little Feats, Automotive Industries, 1996, Vol. 176
[11] Kevin Jost, Supercharge Mercedes-Benz and Peugeot Product Models based on current Sedans, automotive engineering, 1997, vol. 105
[12] Jack Jumaguchi, Mercedes-Benz and Peugeot Product Models based on current Sedans,
automotive engineering, 1997, vol. 105, No. 7
[13] (日) 川合诚……，火花点火发动机中最佳点火定时反馈控制方式．自动车技术会学术讲演会前刷集，1995，内燃机文摘976098．
[14] John Boley, cheap emission cutter excited world interest, Automotive Engineering, 1997, vol. 22
[15] 方锡邦等，模糊逻辑控制在汽车上的应用，世界汽车．1997，7
[16] 徐小林．用于无触点点火的干式点火线圈模糊优化设计，长沙交通学院硕士论文，1996
[17] (日)宫城岳司…，在采用多点点火方式的稀燃小型二冲程发动机中火花塞位置的最佳化，内燃机文摘975231
[18] (英)内燃机用新型点火装置的研制，内燃机文摘965242
[19]．黄佐华，运转参数对火花点火发动机未燃HC排放影响的实验研究，车用发动机，1995．4
[20] 陈辉等，CDI点火定时优化控制方法，小型内燃机，1996，5
[21] 朱辉等，电控汽油喷射发动机中点火线因与喷油器的控制，内燃机工程，1997，1
[22] 宫长明等，甲烷发动机的点火正时和喷射正时优化的试验研究，内燃机学报，1996，3
[23] 张秀芳，火花塞电极形状的研究，火花塞与持种陶瓷，1995，2
[24] 乐利民，车用是有液化气(LPG)的研究和开发，能源工程，1999，6
[25] 陈综明，发展是有液化气汽车的推进对策，环境导报，2000，1
[2] 叶东燕，代用燃料和VOLVO卡车集团的观点，山东内燃机，1984．
[3] 罗毅，代用燃料DME及其研究，小型内燃机与摩托车，2001
[4] 贸克斌等．我国汽车排气污染现状与发展．环境科学．96．8
[5] Professor Bargender, Die Alternativebrenstoff---Nature Gas, MTZ. 1999
[6] 邵千钧，点燃式内燃机燃用LPG电控喷射研究，浙江大学硕士学位论文，2000．1
[7] 蔡永立．液化石油气——汽车的新能源．能源季刊(台湾)．24卷第4期(1994．10)
[8] 郭志东，LPG发动机燃料系统的开发动向，客车技术，2001，4
[9] 赵福堂，《汽车电器与电子设备》，北京理工大学出版社，1996
[10] Norman Martin, Little Feats, Automotive Industries, 1996, Vol. 176
[11] Kevin Jost, Supercharge Mercedes-Benz and Peugeot Product Models based on current Sedans, automotive engineering, 1997, vol. 105
[12] Jack Jumaguchi, Mercedes-Benz and Peugeot Product Models based on current Sedans,
automotive engineering, 1997, vol. 105, No. 7
[13] (日) 川合诚……，火花点火发动机中最佳点火定时反馈控制方式．自动车技术会学术讲演会前刷集，1995，内燃机文摘976098．
[14] John Boley, cheap emission cutter excited world interest, Automotive Engineering, 1997, vol. 22
[15] 方锡邦等，模糊逻辑控制在汽车上的应用，世界汽车．1997，7
[16] 徐小林．用于无触点点火的干式点火线圈模糊优化设计，长沙交通学院硕士论文，1996
[17] (日)宫城岳司…，在采用多点点火方式的稀燃小型二冲程发动机中火花塞位置的最佳化，内燃机文摘975231
[18] (英)内燃机用新型点火装置的研制，内燃机文摘965242
[19]．黄佐华，运转参数对火花点火发动机未燃HC排放影响的实验研究，车用发动机，1995．4
[20] 陈辉等，CDI点火定时优化控制方法，小型内燃机，1996，5
[21] 朱辉等，电控汽油喷射发动机中点火线因与喷油器的控制，内燃机工程，1997，1
[22] 宫长明等，甲烷发动机的点火正时和喷射正时优化的试验研究，内燃机学报，1996，3
[23] 张秀芳，火花塞电极形状的研究，火花塞与持种陶瓷，1995，2
[24] 乐利民，车用是有液化气(LPG)的研究和开发，能源工程，1999，6
[25] 陈综明，发展是有液化气汽车的推进对策，环境导报，2000，1
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