Gasoline or diesel that has to be cooled with a special system? It does exist! But what does fuel cooling actually do? As the name suggests, fuel cooling cools the fuel. This can have very positive effects, especially in summer. However, the device has other advantages. Fuel cooling for the car is intended to help ensure that the fuel is cooled optimally before it runs back into the tank from the injection pump. Especially in summer, cars with direct petrol injection benefit from this cooling. This is because the device can prevent the fuel from overheating and evaporating. This is clearly noticeable in the car's fuel consumption. Cooled fuel can no longer evaporate and evaporate in summer, but remains available for consumption.
How does the fuel cooler work?
A fuel cooler is like a heat exchanger. injection compress the fuel in cars with up to 2500 bar, while being heated. this clearly. The whole process is said to result in better engine performance. Excess gasoline, which however no longer comes into the combustion chamber, is then returned to the tank via a separate backflow. With this return of the excess fuel, the fuel is cooled by a heat exchanger of the fuel cooler for the car. The fuel is optimally cooled and cannot evaporate or evaporate, especially when the outside temperature is warm. Basically, fuel contracts when it cools down. This can offer additional advantages in terms of tank volume because less space is required.
Tuning options with a fuel cooler
There are several ways to use a fuel cooler as a tuning measure for the car. In principle, it is also possible, for example, to cool the fuel before it is filled. The tank volume can thus be increased. This method is often used in racing. For example, if the temperature drops from +20 ° C to –20 ° C, the fuel contracts by approximately 0,044 l / l (γ = 0,0011 [1 / K]). With 50 liters of fuel that is approx. 2,2 liters. Then, however, there are two more options for using a fuel cooler for the car. If the cooling is carried out, for example, in the fuel flow in the car, the cooler and denser fuel can lead to an increase in the injected fuel mass and thereby increase the engine output. However, this tuning option is not available on all vehicles.
Tuning for extra performance?
Then there is another tuning option with a fuel cooler. If the fuel cooler is used in the return line, for example, evaporation of the returning fuel from the injection system can be prevented. Because unused fuel in the combustion chamber is returned to the tank via the return. Nowadays there are many Tanks made of plastic used. The fuel in the plastic tank does not get enough cooling, especially in summer. A plastic cooler in the return is usually made of lightweight aluminum and can dissipate the heat excellently. And if a fuel cooler is used in the fuel supply, the injected fuel mass can be increased due to the cooler and therefore denser fuel. Thus, one achieves a higher performance. However, additional components must be adapted here. A current engine with lambda control would reduce the injected volume in order not to run out of the lambda value. The software would have to be adapted if it was a modern engine. In the case of a “commercial” increase in performance, this tuning measure should therefore be neglected with regard to the effect.
Conclusion: area of application not only in vehicles
With a high-performance fuel cooling system, you can achieve a higher fuel density and therefore better efficiency if everything fits, So you keep more power and less consumption. This also results in a lower injection temperature in the combustion chamber, which also means less stress on the engine and the injection nozzles and piston rings. Cleaner combustion and thus improved exhaust gas behavior can also be achieved through lower NOx / HC / CO values. The application area is diverse, because fuel cooling can be used with all internal combustion engines. It doesn't matter whether gasoline, diesel or gas. This makes sense in motorsport, in vehicles with high performance, or in industrial engines. With normal road vehicles, however, other tuning measures should first be carried out in order to increase performance.
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