Wideband Lambda Controller with Bosch CJ125 and LSU 4.9 with 0-5V output and CAN-Bus Interface
Feature list
- CAN output, compatible with AEM X-Series UEGO
- analog output for lambda 0.65 to 1.3 (0.25v to 4.8V)
- debug messages over CAN (pid, heater status, diag registers, ...)
- activatable via TTL input (INPUT 1)
- fast: 10ms refresh rate (reading the probe, calculation lambda and O2, sending CAN message and setting analog output)
- Bosch recommended heating strategy
- analog output for lambda 0.65 to 1.3 (0.25v to 4.8V): done
- CAN output (AEM X-Series UEGO protocol): done
- debug messages over CAN: done
- Bosch recommended heating strategy: done
- PID controller for heating the probe: done
- activation per GPIO (pull IN1 to GND): done
activation per CAN: open
Interactive BOM for easier hand-soldering you can download from the github (BL49/hardware/V0.0.1/bom)
or access online here: https://oelprinz.000webhostapp.com/BL49/V0.0.1/iBOM/ibom.html
Quick link to schematic: https://github.com/oelprinz-org/BL49/blob/master/hardware/V0.0.1/schematics.pdf
| Bosch part number |
|---|
| 30615 |
| 40103 |
| 30522 |
Basically, the Bosch probes whose numbers start with 0 258 017 will fit, also Bosch 0 281 004.
Bosch numbers beginning with 0 258 007 are LSU 4.2 probes and will not fit.
| Bosch number | Length overall | Comment |
|---|---|---|
| 0 258 017 012 | 1060mm | |
| 0 258 017 025 | 1000mm | Bosch motorsport part, tested during development |
| 0 281 004 028 | 540mm | common probe for diesel engines, Used during development |
| 0 258 017 029 | 620mm | grey, used by BMW after 09/2006 (1178 7539124) |
| 0 258 017 038 | 340mm | grey, used by BMW (11787537984) |
| 0 258 017 092 | 950mm | black, used by BMW (1178 7540167) |
| 0 258 017 126 | 680mm | black, used by BMW after 09/2006 (1178 7561410) |
| 0 281 004 150 | 1215mm | |
| 0 281 004 184 | 1000mm | |
| ... |
| Pin# | Color | Description | Symbol |
|---|---|---|---|
| 1 | red | Pump current APE | IP |
| 2 | yellow | Virtual ground IPN | VM |
| 3 | white | Heater voltage H- | Uh- |
| 4 | grey | Heater voltaget H+ | Uh+ |
| 5 | green | Trim Resistor RT | IA |
| 6 | black | Nernst voltage UN | RE |
