Technique! The background of BMW’s water injection
Posted on 15-02-2015 at 12:06 am by MauritsH – 31 Comments”
Interesting, water injection on BMW’s feestnummer, but what is it for, and we’re going to ever see on production models?
The temperature of the twin-turbo 6-in-line of BMW’s M4 can really add up, with all the adverse consequences. To these problems to overcome, introduced the German brand, the M4 Safety Car a fuel injection system that the tiny water particles in the combustion chamber when the injection.
This is the temperature of the mixture is lowered, which at first makes for a more ideal combustion temperature. So can the ignition timing be accurately adjusted and it is possible to increase the compression, without which the life of the engine below suffers.
Moreover, in this way, the knock is prevented. Knock (or bargaining) is the independent ignite the combined fuel/oxygen. In a diesel engine to understand the intent, but when a petrol engine is a disaster and the considerable damage to the block yield.
Knock and bargaining
The risk of knock is also the reason for owners of supercars (especially with turbocharged engines) to petrol with a higher octane rating fuel. After all, the higher the octane level, how to better knock resistance of the fuel, the smaller the chance of bargaining. BMW claims however that their water injection makes it possible to create gasoline with a lower octane rating (Euro 95) petrol, Super 98, for example, is not available.
The above advantages result according to BMW, in a higher output and a lower fuel consumption. Both advantages are of course partly offset by the additional weight that the system (including a refillable tank to 5 gallons) in the scale brings, but that is also just a proefballonnetje.
We are going on production cars back?
The big question is of course, we BMW’s water system to go back to see it on production models. That you are not under the hood of your grandpa’s 2-series Gran Tourer will find seems to us to be self-evident, but according to the geruchtenmachine is the possible M4 GTS with this ingenious system. So Stay tuned!
For a detailed animation video of BMW’s water injection, check out the video below.
