{"action":"created","issue":{"url":"https://api.github.com/repos/LeeKeifon/LeeKeifon_22-25/issues/26","repository_url":"https://api.github.com/repos/LeeKeifon/LeeKeifon_22-25","labels_url":"https://api.github.com/repos/LeeKeifon/LeeKeifon_22-25/issues/26/labels{/name}","comments_url":"https://api.github.com/repos/LeeKeifon/LeeKeifon_22-25/issues/26/comments","events_url":"https://api.github.com/repos/LeeKeifon/LeeKeifon_22-25/issues/26/events","html_url":"https://github.com/LeeKeifon/LeeKeifon_22-25/issues/26","id":240059048,"number":26,"title":"2017.07_Waukesha技术资料翻译","user":{"login":"LeeKeifon","id":26304905,"avatar_url":"https://avatars2.githubusercontent.com/u/26304905?v=4","gravatar_id":"","url":"https://api.github.com/users/LeeKeifon","html_url":"https://github.com/LeeKeifon","followers_url":"https://api.github.com/users/LeeKeifon/followers","following_url":"https://api.github.com/users/LeeKeifon/following{/other_user}","gists_url":"https://api.github.com/users/LeeKeifon/gists{/gist_id}","starred_url":"https://api.github.com/users/LeeKeifon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/LeeKeifon/subscriptions","organizations_url":"https://api.github.com/users/LeeKeifon/orgs","repos_url":"https://api.github.com/users/LeeKeifon/repos","events_url":"https://api.github.com/users/LeeKeifon/events{/privacy}","received_events_url":"https://api.github.com/users/LeeKeifon/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":7,"created_at":"2017-07-03T03:27:01Z","updated_at":"2017-07-26T07:25:11Z","closed_at":null,"body":"## 一、*Waukesha - Installation Operation Maintenance R (1)*\r\n> 主要是讲解Waukesha提供的控制系统——*AIR/FUEL MODULE*\r\n\r\n#### 用于引擎控制的产品(Custom Engine Control Product)\r\n- 点火模块(Ignition Module)\r\n- [爆震传感器](http://baike.baidu.com/link?url=1nATSAacpQKvZa2Ucl04qh30nNX30JMGYBaNRs7gXpAlvU7JtxSfsl_E8VNAaiKfFqFqrrq-UMXBm7xTgjrTz_Mmg9WcahS8_YqGQToSzBKaaPOr6dhb3dbuEkuwT7Lrs5z9qDaitkSCdFFP2lEj0K)模块(Detonation Sensing Module System)\r\n- 空燃比模块(Air/Fuel Module System)\r\n- 涡轮增压器控制管理系统(Turbocharger Control Management System)\r\n- 【还有什么发动机中还有什么电气控制模块？】\r\n\r\n###  Section1.05 Description Of Operation\r\n#### 1.系统构成(AFM System)\r\n> 作用对象：AT/VHP/VGF 燃气引擎\r\n- 氧气检测系统(oxygen sensing system) \r\n    - 氧气化学计量传感器(Stoichiometric Oxygen Sensor)：用于Catalyst、Best Power/Economy Mode\r\n    - 贫氧气传感器(Lean Burn Oxygen Sensor)：用于Lean Burn Mode\r\n    - 排气热电偶(exhaust thermocouple)：确保oxygen sensing system测量的准确性\r\n- 进气歧管压力传感器(intake manifold pressure transducer)\r\n   - 用于催化剂和贫氧模式(catalyst and lean burn modes)\r\n- 电气控制模块(electronic control module (AFM module))\r\n- 步进电机(stepper motor)\r\n\r\noxygen sensing system测量氧气量\r\nexhaust thermocouple\r\nstepper motor根据氧气量控制油量(空气量应该是固定的)\r\n\r\n燃料调节器fuel regulators不是每个缸都有的吗？\r\n\r\n#### 2.系统基本原理(Theory Of Operation)\r\n- 关键图\r\n   - Stoichiometric Oxygen Sensor：电压-AFR特性图(Fig1.05-7)\r\n   - Lean Burn Oxygen Sensor：电压-AFR特性图(Fig1.05-8)\r\n   - AFR-LOAD：特性图(Fig1.05-9 左)\r\n   - STEPPER POSITION-LOAD：特性图(Fig1.05-9 右)\r\n   - 使用方法：首先，根据(Fig1.05-7)得到某时刻氧气传感器的电压，反推出系统的**实际AFR**；然后，由于已知负载，根据(Fig1.05-9 左)，得到**理想AFR**；之后，对比**实际AFR**与**理想AFR**，在(Fig1.05-9 右)的要求下，可知道如何控制步进电机\r\n\r\n- 控制模式(Control Mode)\r\n    - Catalyst Mode：设置点只有一个\r\n    - Best Power/Economy Mode：在一定时间内，设置点会变一次。变化的程度是根据预先编程和氧气的计量状况去确定\r\n    - Lean Burn\r\n\r\n#### 3.本文定义(Definition)\r\n  - AFR：单位燃料量所需的空气量\r\n  - Best Economy：提供最低的燃油消耗，同时保持发动机稳定性，负载响应和连续动力能力\r\n  - Best Power：在大开油门时，提供最大的功率水平\r\n  - Catalyst Setting：发挥减排的最佳性能\r\n  - Closed-Loop Control：闭环控制\r\n  - Combustion Stability Limit：当负载超过大于/小于某些值时，AFM系统失效\r\n  - Dead-Band：设置氧传感器的许可误差范围，在该范围内步进电机不运动。该参数只用于catalyst模式上（可设置）\r\n  - Delay Time：在进行化学计量数据检测之前等待的时间量，时间范围为0.1~25分钟，用于Best Power/economy模式（可设置）\r\n  - Gain：增益。当氧传感器信号超出许可范围内时，它会影响步进电机位置变化程度的大小。即在相同的氧传感器信号下，增益越大时，步进电机位置变化越大（可设置）\r\n  - Lean AFR：燃料量少于要求值\r\n  - Rich AFR：燃料量多于要求值\r\n  - Lean Limit：步进电机允许到达的”最低“位置，此时进入燃料量最少\r\n  - Rich Limit：步进电机允许到达的”最高“位置，此时进入燃料量最多\r\n  - Map：进气歧管压力与氧气传感器输出的关系图，用于Catalyst和Lean Burn模式；进气歧管压力点是根据所选择的发动机型号进行预编程的\r\n  - Offset Steps：步进电机运动的步数，\"+\"代表增加燃料，\"-\"代表减少燃料，用于Best Power/economy模式（可设置）\r\n  - Search Delay：在两次化学计量数据检测之间的时间量，用于Best Power/economy模式（可设置）**与delay time有何不同？？？**\r\n  - Sinking Circuit：用于保护系统的电路，一端接地。当AFM系统有问题时，该电路打开，可以承受最大50V DC和1A的电流\r\n  - Stepper Start Position：设置开机时的步进电机起始位置（可设置）**Caution：当引擎负载在40%以上时，不要将步进电机设置到起始位置**\r\n  - Step：该AFM系统，1步=1/400转\r\n  - Stoichiometric AFR：理论上完全燃烧的AFR值"},"comment":{"url":"https://api.github.com/repos/LeeKeifon/LeeKeifon_22-25/issues/comments/317971480","html_url":"https://github.com/LeeKeifon/LeeKeifon_22-25/issues/26#issuecomment-317971480","issue_url":"https://api.github.com/repos/LeeKeifon/LeeKeifon_22-25/issues/26","id":317971480,"user":{"login":"LeeKeifon","id":26304905,"avatar_url":"https://avatars2.githubusercontent.com/u/26304905?v=4","gravatar_id":"","url":"https://api.github.com/users/LeeKeifon","html_url":"https://github.com/LeeKeifon","followers_url":"https://api.github.com/users/LeeKeifon/followers","following_url":"https://api.github.com/users/LeeKeifon/following{/other_user}","gists_url":"https://api.github.com/users/LeeKeifon/gists{/gist_id}","starred_url":"https://api.github.com/users/LeeKeifon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/LeeKeifon/subscriptions","organizations_url":"https://api.github.com/users/LeeKeifon/orgs","repos_url":"https://api.github.com/users/LeeKeifon/repos","events_url":"https://api.github.com/users/LeeKeifon/events{/privacy}","received_events_url":"https://api.github.com/users/LeeKeifon/received_events","type":"User","site_admin":false},"created_at":"2017-07-26T07:25:11Z","updated_at":"2017-07-26T07:25:11Z","body":"## 电气装置_电柜上\r\n[VAR功率因数自动补偿器](http://www.docin.com/p-638120606.html)：功率因数自动补偿器是提高电网系统中功率因数的全自动化电子装置，通过它的调节作用，使电网中的无功消耗降到最小，达到充分利用电能、节约用电的目的。"}}
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