A researcher at Technische Universiteit Eindhoven (Eindhoven, the Netherlands) has developed a software patch that can increase a car's fuel efficiency to a total fuel savings of 2.6%, without having to replace any of the parts of the car. Uploading a software patch to the car's computer and adding one small cable suffices.

Via the patch, excess power can be used to charge the car battery. The generator can be turned off when it is inefficient for the engine to power it, which leads to reduced fuel consumption. The car can also brake electrically, generating energy that can be stored in the battery. Finally, it is possible to partly shut off the electric energy systems, such as rear-window and seat heating, for further improvement of the power supply system.

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