The Motronic is the trade name given to a range of digital engine-management systems developed by Robert Bosch GmbH, commonly known as Bosch. This schematic shows typical diagram of Motronic engine system. This system was designed to fully integrate and regulate all major engine system parameters, thereby enabling fuel delivery and spark timing control functions to be controlled by the same unit, in an attempt to achieve optimum efficiency, driveability and power output potential.
This Motronic Engine system composed of: 1. Fuel Tank; 2. Fuel Pump; 3. Fuel Filter; 4. Pressure Regulator; 5. Pressure Damper; 6. Control Unit; 7. Ignition Distributor; 8. Injection Valve; 9. Cold Start Valve; 10. Throttle Valve; 11. Throttle Valve Switch; 12. Air Flow Meter; 13. Oxygen Sensor; 14. Thermo-time Switch; 15. Temperature Sensor; 16. Auxiliary Air-Valve; 17. Reference Mark Sensor; 18. Main Relay; 19. Pump Relay. (click image to enlarge).