Formula 1-technology: all about Turbulent Jet Igniton

Posted on 12-06-2016 at 15:10 by MauritsH – 43 Comments”

Mercedes and Ferrari had it all and Renault (or TAG Heuer) now also; Turbulent Jet Ignition. But what is TJI exactly and why is it just 30+ hp extra on? We’ll talk you in.

Technology in Formula 1 is quite complicated, that’s an understatement. However, we are going to attempt to get you to explain how it is that the top teams in regards to power is absolutely above the rest of the field stick out. Next (test)facilities, expensive designers and suitable managers is also on the highest level of the sport always in need of ordinary horsepower.

TJI is actually down on further improving the combustion in the combustion chamber, because that produces relatively more power and lower fuel consumption. That last seems to be not important in F1 because they do not tax, but teams are still stuck with a maximum fuel consumption. A refresher on the operation of the internal combustion engine find you besides HERE.

The principle works – in Jip and Janneke language – about as follows. See the system as a kind of replacement of the old spark plug, pretty much the only more or less conventional component on a Formula 1 car of today. A small part of it in a spray mixture of air and fuel (less than 5%) is in a separate combustion chamber at the top of the cylinder by a spark plug to explode. Through small holes in a kind of injector are the sparks that this creates “passed” to the large combustion chamber where the power comes from.

Here is the main part of the combustible mixture air/fuel is injected, more than 95%. This is also the part of the fuel that eventually the arbeidsslag. The mixture from the small room (no, not that room) so it takes up the task of the spark plug, with one important difference. The spark plug fires at one place, while the unburned mixture out of the small room through several holes more evenly across multiple “sparks” in the cylinder is divided.

The consequences

First of all, being there at one time a much larger pressure on the piston is exerted, because the combustion on multiple points and over a larger surface area is distributed. This is the risk on bargaining (spontaneous ignition of the mixture, it is very harmful to the engine). In other words, the compression can safe a few teeth are screwed without pingelgevaar.

Furthermore, the system has favorable consequences for the consumption of the 1.6-litre turbocharged engines. How come? Only the mixture in the small room, the need to “empire” to be adjusted (relatively a lot of fuel compared to the amount of air). Therefore, the mixture in the large room (and therefore also the vast majority of the used amount of air and fuel) to poorer adjustment. Win/win!

Overall,

In place of a mixture in the combustion chamber is injected and then the spark plug for the ignition, do TJI engines in two phases. A little bit of fuel in a separate combustion chamber by a spark plug to explode, and then burning through small holes makes for a nice uniform combustion in the large, actual combustion chamber.

Result: more power, lower fuel consumption, and (in the case of Renault) a pk or 30 extra. Cheers.