Direct CN
(directly generated by the cylinder pressure attenuation)
Indirect CN
(attenuated by the cylinder pressure but generated by mechanics)
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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
AI50
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RMAX : Maximum rise per degree crank angle
爆震 残余气体 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)
useful for invehicle testing
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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 IMEP_cov : Variant coefficient over a certain number of cycles
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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Trouble-shooting
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1. Misfire 失火分析
100 90 80 70 60 50 40 30 20 10 0 0
35
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2. Limit monitoring — Digital output
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Digital signal can also be imported to a 3-rd device in the test bench : e.g. Emergency stop
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2. 汽油机爆震分析 (Siemens VDO)
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2. 汽油机爆震分析 (评价)
评价方法: 1. KFRQ + KRAT : Knock Frequency + Knock Ratio 2. KPEAK : Knock Peak 3. KINT : Knock Integral 4. KPEAK_STAT : Knock Peak Statistic
Heat release position: AI50 ≈ 8°CA AI50 > 8°CA, Post-combustion , Power AI50 < 8°CA, Post-combustion , Power
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4. NVH 噪声
CAV+A: Actual volume,
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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
V2.0
IMEP1 bar IMEP2 bar IMEP3 bar IMEP4 bar
Evaluation parameter:
50
100
150
200
250
300 IMEP
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1. Misfire 失火分析
Mis-fire
Normal
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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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Evaluation parameter: PMAX 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。
Evaluation parameter: PMAX
PMAX1 bar PMAX2 bar PMAX3 bar PMAX4 bar
50
100Biblioteka 150200250
300
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1. Misfire 失火分析
0.6 0.4 0.2
0 0
-0.2 -0.4 -0.6
Combustion Noise
(all noise components which correlate with the
cylinder pressure)
Mechanical Noise
(all noise components which do not correlate with the cylinder pressure)
Indication results are transferred via INCA to testbed controller
Indication results are transferred via CAN to testbed controller
additionally
AVL IndiCom Serial Testbed Protocol via RS232 or Ethernet
which the KiBox is to be used
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During measurement: the INCA icon appears
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3. 与标定软件 ETAS INCA 集成
During measurement: Parameters are auto-
matically imported into INCA
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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
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Structure Response Function
4-Cyl. 2.2l Diesel 6-Cyl. 3.2l Diesel 4-Cyl. 1.7l Diesel
Standard Struct. Resp. Function Mean Struct.Response Function
Frequency [Hz]
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)
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2. 汽油机爆震分析 (监控)
Evaluation methods: 5. Limit monitoring :
Trigger storage
Digital output
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3. 动力与排放平衡
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监控
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1. Limit monitoring — Data stored automatically
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Data stored automatically when the specified condition is triggered
Can be measured on the acoustic test bench using a microphone.
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Structure Response Function [dB(A)]