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Old 2nd September 2016, 09:43   #1
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Default Bosch WaterBoost : Water Injection

With Bosch WaterBoost, the combustion engine is once again ready to overtake and has its best days ahead. The secret of its success is a tuning formula with demineralized water, which boosts power generation, lowers fuel consumption, and minimizes concerns about CO2 emissions. So if you soon come across a turbocharged gasoline direct-injection engine, which despite concerted downsizing can keep the competition in its performance class on its toes even at high engine speeds, you'll know what's driving it: Bosch WaterBoost. From the world of motorsport. For more fun to drive.


Source
http://www.bosch-mobility-solutions....ter-injection/
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Old 2nd September 2016, 10:15   #2
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Default re: Bosch WaterBoost : Water Injection

This is good old water injection that's been available for decades, although its use was limited to military aircraft, drag racing and other such specialist applications. It works on the principle that injecting a small quantity of water mist will result in the mist absorbing heat from the combustion chamber (resulting in the mist vaporizing), and the cooler fuel-air mixture having a more efficient burn as a result - resulting in more power and lesser emissions. I know it sounds crazy and counterintuitive - because we're terrified of water in our engines causing hydrolock - but the concept is proven and in use. The water mist is used in addition to the petrol-air mixture, it is not a substitute for either of them.
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Here's a video:


Bosch state that only very little water is required:
Quote:
This is also the reason only a small additional volume of water is needed: for every one hundred kilometers driven, only a few hundred milliliters are necessary. As a result, the compact water tank that supplies the injection system with distilled water only has to be refilled every few thousand kilometers at the most.

And if the tank should run empty, there is nothing to worry about: the engine will still run smoothly – albeit without the higher torque and lower consumption provided by water injection.
I think the key change here is that with Bosch being a common manufacturer of ECUs, injectors and other engine management systems, them providing a standardized water injection package will mean we can start seeing it more frequently in performance road cars (not our average Maruti 800 ).

In fact the BMW M4 GTS (the track version of the M4 coupé) comes with a water injection system provided by Bosch.
Bosch WaterBoost : Water Injection-p90215440thenewbmwm4gts0420162250px.jpg

Quote:
At the heart of each and every BMW M model is its engine. The BMW M4 GTS uses the multi-award-winning six-cylinder in-line turbo engine from the BMW M3/M4, but adds innovative water injection technology to give the 3.0-litre unit a substantial power boost. The water injection system raises the engine’s output significantly – to 368 kW/500 hp – and increases torque to 600 Nm (442 lb-ft) (compared to 425 hp and 550 Nm in the coupé), yet still keeps fuel economy and CO2 emissions at the level of the BMW M4 Coupe.

Last edited by arunphilip : 2nd September 2016 at 10:38. Reason: Typos, added video
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Old 2nd September 2016, 12:09   #3
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Default re: Bosch WaterBoost : Water Injection

Source
www.bosch-waterboost.com

Water injection

Water instead of gasoline: Bosch innovation reduces fuel consumption by up to 13 percent

Bosch is the first and only supplier to offer water injection
Extra bonus: water saves fuel and can increase engine power
Online special with videos and animated films: www.bosch-waterboost.com


Bosch WaterBoost : Water Injection-boschwassereinspritzung.jpg


Did you know that even advanced gasoline engines waste roughly a fifth of their fuel? Especially at high engine speeds, some of the gasoline is used for cooling instead of for propulsion. With its new water injection, Bosch shows that it does not have to be that way. Particularly when accelerating quickly or driving on the free-way, the injection of additional water makes it possible to reduce fuel consumption by up to 13 percent. “With our water injection, we show that the combustion engine still has some tricks up its sleeve,” says Dr. Rolf Bulander, chairman of the Bosch Mobility Solutions business sector and member of the board of management of Robert Bosch GmbH. The fuel economy offered by this Bosch technology comes especially to the fore in three- and four-cylinder downsized engines: in other words, in precisely the kind of engines to be found under the hood of any average midsize car.

Extra boost for the turbocharged engine

But it is not only in the area of fuel economy that the Bosch innovation comes into play. It can make cars more powerful as well. “Water injection can deliver an extra kick in any turbocharged engine,” says Stefan Seiberth, president of the Gasoline Systems division at Bosch. Earlier ignition angles mean that the engine is operated even more efficiently. On this basis, engineers can coax additional power out of the engine, even in powerful sports cars.

The basis of this innovative engine technology is a simple fact: an engine must not be allowed to overheat. To stop this happening, additional fuel is injected into nearly every gasoline engine on today’s roads. This fuel evaporates, cooling parts of the engine block. With water injection, Bosch engineers have exploited this physical principle. Before the fuel ignites, a fine mist of water is injected into the intake duct. Water’s high heat of vaporization means that it provides effective cooling.

This is also the reason only a small additional volume of water is needed: for every one hundred kilometers driven, only a few hundred milliliters are necessary. As a result, the compact water tank that supplies the injection system with distilled water only has to be refilled every few thousand kilometers at the most.

And if the tank should run empty, there is nothing to worry about: the engine will still run smoothly – albeit without the higher torque and lower consumption provided by water injection.


Bosch WaterBoost : Water Injection-infographicwater_injection.jpg


Is this technology already in production?
The BMW M4 GTS is the first production vehicle to feature an innovative and groundbreaking water injection system. In the vehicle’s turbocharged six-cylinder engine, it offers improved performance and consumption even at full load. Bosch supplies water injection parts for the BMW M4 GTS.

Source
https://www.press.bmwgroup.com/globa...ts?language=en
Performance boost courtesy of innovative water injection.
At the heart of each and every BMW M model is its engine. The BMW M4 GTS uses the multi-award-winning six-cylinder in-line turbo engine from the BMW M3/M4, but adds innovative water injection technology to give the 3.0-litre unit a substantial power boost. The water injection system raises the engine’s output significantly – to 368 kW/500 hp – and increases torque to 600 Nm (442 lb-ft), yet still keeps fuel economy and CO2 emissions at the level of the BMW M4 Coupe (8.5 litres per 100 km* [33 mpg imp], 199 g/km*). This makes the BMW M4 GTS the most agile, radical and dynamically potent model in the range. It races from a standstill to 100 km/h (62 mph) in a mere 3.8 seconds and hits a limited top speed of 305 km/h (189.5 mph).

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How high is fuel consumption in the driving cycle?
In the future consumption test (WLTC), water injection makes it possible to save up to 4 percent fuel. In real driving conditions, even more is possible: here, fuel consumption can be reduced by up to 13 percent when accelerating quickly or driving on the freeway.

Doesn’t water injection cause the engine to rust?
No. No water is left in the combustion chamber. The water evaporates before com-bustion happens in the engine. All the water is expelled into the environment, to-gether with the exhaust.

How is water refilled?
Water injection only requires a small amount of water to be kept on board. On average, it only has to be refilled every 3,000 kilometers. The separate water tank has to be filled with distilled water.

Can the water in the tank freeze?
When the engine is stopped, the water flows back into its tank, where it may freeze. Following engine restart, the water thaws again.

Is there such a thing as direct water injection?
Bosch uses a port injection system, since it has clear technical advantages and costs less. This makes water injection suitable for large-scale production, as well as for many vehicle segments.
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Old 3rd September 2016, 00:19   #4
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Default Re: Bosch WaterBoost : Water Injection

Been dreaming about a water injection kit for my Turbocharged car... The aftermarket ones available abroad are quite expensive...

The hope is that with more and more cars using this, the overall cost of the kits start to come down.
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