What's An ECU?
The ECU utilises performance maps to supply the most optimal tune for normal engine performance. Modifying the efficiency map is what yields modifications in effectivity and power.
For road applications the ECU engine tuning would normally favour a performance map that utilised less fuel and air. The effect is a saving in fuel consumption.
For competitors functions the chip tuning would favour an increase in fuel and air. Nonetheless the ratio could be variable relying upon the ambient circumstances as well because the effectiveness of the ignition spark.
The algorithm that determines the combo as well as the delivery of the spark is primarily what differentiates one Engine Control Unit from another.
Vehicle manufacturers professionalhibit access to the engine management unit as variations to the program may cause the engine to fail. Throughout the servicing process the authority appointed by the producer will routinely confirm if the performance map has been modified. The implications of a modification can either be that the service is refused or that the warranty is invalidated.
ECU's aren't limited to road vehicles. Most fashionable modes of transport including bikes, prime movers (trucks, semi's), earth moving equipment, scooters, buses, סטייג trams and even golf carts utilise engine management units.
Typically they're a metallic box comparable in size to a mean paperback novel. They've the ability to not solely management the performance map however more recently they've been designed to log the events. This offers various authorities the ability to recall and analyse these events thus making the ECU a type of black-box recorder.
In the racing world this is particularly helpful as it allows engine tuners and drivers to analyse the efficiency of an engine through the course of a lap or stage.
For instance, if the analyses shows that fuel pressure at a particular point within the rev range (number of engine revolutions per minute) is in decline then the engineers can be able to deduce that the ability can be adversely effected at that time. The theoretical solution via performance chip tuning would be to encourage the additional delivery of fuel throughout that section of the lap or stage.