4.
KPEAK_STAT : Knock Peak Statistic
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2. 汽油机爆震分析 (监控)
Evaluation methods: 5. Limit monitoring :
Trigger storage Digital output
V2.0
பைடு நூலகம்
additionally
Indication results are transferred via CAN to testbed controller
AVL IndiCom Serial Testbed Protocol via RS232 or Ethernet
2013
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3. CAN Monitoring
Configure CAN database
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3. CAN Monitoring
KiBox CAN data displayed in a device accepts CAN data
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1. Misfire 失火分析
0.6
0.4 IMEP1 bar IMEP2 bar IMEP3 bar IMEP4 bar 0 50 100 150 200 250
0.2
Evaluation parameter:
300 IMEP
0
-0.2
-0.4
During measurement: the INCA icon appears
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3. 与标定软件 ETAS INCA 集成
During measurement: Parameters are automatically imported into INCA
13
标定
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1. 发动机标定系统
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1. 发动机标定系统
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2. 与台架通讯 --- AVL PUMA / Horiba
V1.4
Indication results are transferred via INCA to testbed controller
-
2014
Year
17
3. 与标定软件 ETAS INCA 集成
During installation: Automatically detect the INCA version installed in PC Select the version of INCA in which the KiBox is to be used
KiBox 燃烧分析仪应用
刘延波 Kistler Instruments
1
燃烧分析及监控系统
与曲轴转角相关的数据测量:
缸压 喷油正时
进/排气压力
温度 喷射压力 针阀升程
喷油脉宽
点火正时 点火脉宽
压力指示目的:
换气分析 发动机效率 发动机匹配 发动机摩擦 爆震 残余气体
机械负荷
燃烧稳定性 振动/振荡
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4. 与标定软件 ATI VISION 集成
Offline Analysis
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5. 汽油机标定 主要关注参数
KPeak : Knock Peak
AI50 : Location of 50% burnt mass fraction
25
Trouble-shooting
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1. Misfire 失火分析
100 90
80
70 60 50 40
Evaluation parameter: PMAX
30
20 10 0
PMAX1 bar PMAX2 bar PMAX3 bar PMAX4 bar 0 50 100 150 200 250 300
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2. Limit monitoring — Digital output
Digital signal can also be imported to a 3-rd device in the test bench : e.g. Emergency stop
Direct CN
(directly generated by the cylinder pressure attenuation)
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Indirect CN
(attenuated by the cylinder pressure but generated by mechanics)
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4. 与标定软件 ATI VISION 集成
Multiple configurations may be added to the device Can be switched at any time useful for invehicle testing
-0.6
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1. Misfire 失火分析
Mis-fire
Evaluation parameter:
PMAX
Normal IMEP
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2. PMAX 过大的危害分析
发动机的运动部件，尤其活塞连杆机构，在每个循环 都承受很大的负荷 当缸内燃烧压力峰值过大时，会导致一些零部件因负 载太大而损坏 例如：活塞环会因为负载太大而断裂，导致拉缸。 严重的甚至导致整台发动机报废。
AI50
RMAX : Maximum rise per degree crank angle ARMAX : Crank angle location of RMAX
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7. 应用举例： 换挡扭矩控制
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3. 动力与排放平衡
Heat release position: AI50 ≈ 8° CA AI50 > 8° CA, Post-combustion AI50 < 8° CA, Post-combustion
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, Power , Power
9
4. NVH 噪声
CAV+A: Actual volume, Can be measured on the acoustic test bench using a microphone.
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Structure Response Function
-160
-180
Frequency [Hz]
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4. NVH 噪声
Fully Anechoic Test Bench
Fully Anechoic Engine Test Stand
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4. NVH 噪声
Total Engine Noise (Air Borne Noise Level) Combustion Noise
点火检测
燃烧噪声 排放
能量平衡
喷射特性 发动机功率
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热动力学分析
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1. 柴油机喷射参数优化
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2. 汽油机爆震分析 (Knock Analysis)
(all noise components which correlate with the cylinder pressure)
Mechanical Noise
(all noise components which do not correlate with the cylinder pressure)
IMEP_cov : Variant coefficient over a certain number of cycles
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5. 汽油机标定 主要关注参数
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6. 柴油机标定 主要关注参数
Structure Response Function [dB(A)] -80
-100
-120
-140
4-Cyl. 2.2l Diesel 6-Cyl. 3.2l Diesel 4-Cyl. 1.7l Diesel