Water Injection technique - Does it Boost your Engine performance?

The automobile engine will come, and then I will consider my life's work complete.
-Rudolf Christian Karl Diesel

 

 

Gasoline-powered vehicles actualize the detonation while in higher load conditions. Notably, engines with higher compression ratios struggle with variable vibrations caused by the knocking sound based on temperature rise. Possibilities like poor performance and increased emissions were leftover. Many furtherances have been attempting to bring a fulfilled engine towards the worldview. Specifically, for that purpose, knocking sensors for each cylinder have been deployed with a control unit to analyze and eliminate the knocking tendency in internal combustion engines. With those implementations, vehicles can hold off their robustness.

Nevertheless, another technology is there to knock out the knocking occurrence inside the combustion chamber simply using H2O. Of course, yes!!, using water!!!.

How?
But?
Not possible.
It's completely insane, Right!!

Bosch mobility solutions brought up with the Water Boost injection technique in the engine, which injects the fine mist of water to the combustion chamber to reinforce the cooling rate inside and supports the engine to run at a lower temperature. This Water Boost system promises to withstand the vehicle's expected performance with decreased fuel consumption.

How is this technique going to work?

 

 

The system design is quite simple that includes a water injector, common rail, water pump, and small tank for water storage. Water injectors had arrayed in each inlet port, similar to the MPFI system (Multi-point Port Fuel Injection). For spraying the fuel to the cylinder, Bosch preferred the direct-injection technique. The pump delivers the water from the tank to the common rail to boost the pressure to the peak. 

This system doesn't launch while the engine starts. After detecting the knock at higher loads from the knock sensor via the electronic control unit or generally in higher load conditions, the system charges the water in the common rail then injects it into the port in the form of fine mist. This small amount of fine mist enters inside the cylinder during an intake stroke and absorbs the heat inside. Due to latent heat of vaporization, water mist cools the environs to achieve a possible lower temperature. Meanwhile, gasoline has injected inside, which absorbs the rest of the heat and gets vaporized, the ignition takes place.

So the hotspot formation or valve impingements were evaded, and also, higher fuel demands in higher load conditions were limited. As per Bosch's claims, up to 13 percent of the fuel is saved. In addition to that, due to lower temperature operation, CO2 emission is reduced up to 4 percent. 

            
 

The benefit from this system is retaining higher performance even in overload circumstances with lower emissions. While compared to normally operated engines, torque and brake horsepower at higher load conditions get increased.

Shall we use drinking water for this operation?

Maybe!, but preferably demineralized water is a better option to avoid rust formation inside the system.

So this is Bosch's Water Boost injection technique, implemented in the BMW M4 GTS model, a successive one!.

 

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