Electronic control unit

From Wikipedia, the free encyclopedia
Jump to: navigation, search
An ECU from a Geo Storm.

In automotive electronics, electronic control unit (ECU) is a generic term for any embedded system that controls one or more of the electrical system or subsystems in a motor vehicle.

Types of ECU include Electronic/Engine Control Module (ECM), Powertrain Control Module (PCM), Transmission Control Module (TCM), Brake Control Module (BCM or EBCM), Central Control Module (CCM), Central Timing Module (CTM), General Electronic Module (GEM), Body Control Module (BCM), Suspension Control Module (SCM), control unit, or control module. Taken together, these systems are sometimes referred to as the car's computer. (Technically there is no single computer but multiple ones.) Sometimes one assembly incorporates several of the individual control modules (PCM is often both engine and transmission)

Some modern motor vehicles have up to 80 ECUs. Embedded software in ECUs continue to increase in line count, complexity, and sophistication.[1] Managing the increasing complexity and number of ECUs in a vehicle has become a key challenge for original equipment manufacturers (OEMs).

Types of electronic control units [edit]

Failure of ECU [edit]

The main symptoms of a failure would be the engine not starting, fault light constantly on and unable to be cleared. Although is quite rare, it is a big issue when it happens. To identify the initial problem, manufacturers and producers need to perform certain tests[2] including:

  • material assessment
  • corrosion investigation
  • fractography
  • electronics evaluation
  • fire damage investigation

By performing such test future failures can be prevented and performance enhanced.

References [edit]

  1. ^ Ebert, Christof; Jones, Capers (2009-04-01). "Embedded Software: Facts, Figures, and Future". IEEE Computer Society Press. Retrieved 2010-09-15. 
  2. ^ Failure Analysis ECU