Purpose of the System
The engine management system for the M5 is the BMW - MS S52 system. The hardware and software have been developed by BMW while the control module is supplied by Siemens. The control module is the SKE (Standard Shell Construction) 134 pin design. The MS S52 system conforms to TLEV emission standards.
The main features of the MS S52 include:
- Modular plug structure
- Engine Torque Calculation
- Electronic Throttle Control (EDR) single motor controlling 8 throttle valves
- Separate Idle Control Valve (ZWD 5)
- Integrated Cruise Control
- Double VANOS Control
- 2 - Hot-Film Air Mass Sensors
- Integrated Adaptive Knock Control
- Secondary Air Injection Control
- Mixture Adaption - Idle and Part load
- Fully Sequential Injection
- Engine Over-rev & Max Speed Limiting
- Oxygen Sensor Heating
- Catalytic Converter Temperature Monitoring
- Engine Torque Limiting through DSC Regulation
- Four EDR emergency running (limp home) programs
- Two different throttle progression programs (sport switch)
- Two different servotronic characteristic programs (sport switch)
- Variable engine speed warning zone (Tachometer)
- Oil pump circuit changeover