ECU- On Board Computer
Modern cars use on board computers to control a wide variety of car control components. The most common use is to control engine management. Despite the reciprocating internal combustion engine being a basic design that is over 100 years old, recent advances in engine design and computer control systems have made the petrol/diesel/LPG remarkably efficient.
Electronic fuel injection has been one of the biggest advances as has made the air-fuel mixture control far more accurate. Comparatively, an old carburettor was like pouring a cup full of petrol into your engine whenever you put your foot down.
Fuel injectors can now precisely control how much fuel is squirted into the engine for every turn of the engine. This is one reason why modern engines return such great fuel economy.
On board computers can now control:
- The engine throttle through “fly by wire” systems that do not require linkages or a throttle cable.
- Ignition timing
- Fuel mixture
- 4 wheel steer
- 4 wheel drive
- Electronic Stability control (ESC)
- Suspension tuning
- Steering control
- Climate Control
- On Board Entertainment Systems
- Dash board displays