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技術化商品中心 - PowerPoint PPT Presentation


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2.J1850( + ) 4. 車輛接地 6.ISO15765-4(H) 8.* 10.J1850( - ) 12.* 14.ISO15765-4(L) 16. 電瓶正電. 接腳定義 : 1.* 3.* 5. 訊號接地 7.ISO9141-2(K) 9.* 11.* 13.* 15.ISO9141-2(K). 技術化商品中心. 可 彈 性 組 合 之 汽 車 碼 錶 Compound Automobile Meter with Actively Assembling. PID MODE. 系統設計.

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slide1

2.J1850(+)

4.車輛接地

6.ISO15765-4(H)

8.*

10.J1850(-)

12.*

14.ISO15765-4(L)

16.電瓶正電

接腳定義:

1.*

3.*

5.訊號接地

7.ISO9141-2(K)

9.*

11.*

13.*

15.ISO9141-2(K)

技術化商品中心

可 彈 性 組 合 之 汽 車 碼 錶

Compound Automobile Meter with Actively Assembling

PID MODE

系統設計

1.PID:05 Engine coolant temperature

最小值:-40°C 最大值:215°C Formula:A-40

2.PID:0A Fuel pressure

最小值:0kPa 最大值:765kPa Formula:A*3

3.PID:0B Intake manifold pressure

最小值:0kPa 最大值:255kPa Formula:A

4.PID:0C Engine RPM

最小值:0rpm 最大值:16,383rpm Formula:((A*256)+B)/4

5.PID:0D Vehicle speed

最小值:0km/h最大值:255km/h Formula:A

6.PID:0E Timing advance

最小值:-64°最大值:63.5° Formula:A/2-64

7.PID:0F Intake air temperature

最小值:-40°C最大值:215°C Formula:A-40

8.PID:11 Description:Throttle position

最小值:0%最大值:100% Formula:A*100/255

9.PID:14 Oxygen sensor voltage,Short term fuel trim

最小值:0%最大值:1.275% Formula:A*0.005(B-128)*0.7812

本系統詳細看來,共以四大部分組成,即汽車動態顯示指針碼錶、汽車動態顯示LCD碼錶、OBD-II行車電腦讀取系統及UART串列傳輸介面。

電 路 圖

OBD 診斷硬體接頭SAE J1962

實際作品

OBD-II Protocol傳輸速率

1.SAE J1850(PWM) 41.6K bit/s

2.SAE J1850(VPW) 10.4K bit/s

3.ISO 9141-2 10.4K bit/s

4.ISO 14230-4 10.4K bit/s

5.ISO 15765-4(CAN) 250\500K bit/