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Bosch's Water Injection System Developed For BMW M4 GTS Will Reach Other Cars

BMW’s M4 GTS features the world’s first water injection system available in a production car. It is also the only one that comes in this configuration from the factory, but not for long.
BMW M4 GTS 59 photos
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Bosch, the supplier that has developed the water injection system for BMW, has announced that it will offer the system in other production models. The first cars that will feature it are expected to be launched in 2019, but the Bosch official has yet to announce the models that will get their water injection system.

The news comes from Bosch Global Project Manager Fabiana Piazza, who made an exclusive discussion with the Brits at Autocar. According to the company representative, the system is best suited for cars that provide a power output of over 107 HP per liter, which means that it is ironically suited for small cars with turbocharged engines and supercars, but nothing in between.

As the quoted Bosch representative explained, the water injection technology can boost power by five percent, but its primary goal is to reduce CO2 emissions and increase fuel efficiency.

According to the supplier, the improvement in fuel efficiency is up to 13%, while carbon dioxide emissions are reduced by four percent. The values are recognized by the Worldwide Harmonized Light vehicles Test Procedures, so manufacturers will be interested in fitting the system in their models once this cycle will replace the ongoing NEDC.

In case you are not familiar with this system, the water injection technology from Bosch sprays minute amounts of water in vaporized state in the intake manifold to reduce knocking and the temperature in the combustion chamber.

The risk of hydro locking is inexistent, as is the possibility of rust inside the engine because of the water that has been sprayed in the form of vapors.

Bosch says that the five-liter container stored in the trunk only needs to be refilled every 1,800 miles (2,895 km), but this value is an estimated average, and depends on driving conditions and configuration. It works with distilled water, which is found in supermarkets and auto parts stores without too much hassle, and it is not expensive.

Bosch is already working on an improved version of the system, which will heat the water to prevent frost in the container. Furthermore, BMW is also improving on the system, as the company has been testing direct water injection for a while, which can further enhance the benefits of this technology.

 
 
 
 
 

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