BMW with "akvamotor" Bashny.Net

What's the point? Water has a high heat capacity, and evaporation in the combustion chamber plays the role of a "intercooler": air-petrol mixture is cooled, increasing its density and resistance to detonation. Due to this, there is an opportunity to increase the performance of the turbocharger and make the ignition earlier. Increased efficiency, especially in modes of maximum power. But at the same time by 20-25 degrees, dropping the temperature of the engine.

BMW has a long tradition of water injection: it is still practiced in the aviation BMW 801D engine with gasoline direct injection, which is set in the 40s for fighter planes Focke-Wulf Fw 190. Rather, then, the Germans had used photometering mixture. In the postwar years, the water injection into the intake manifold of the turbocharged engine used Oldsmobile Jetfire and the Saab 99 Turbo S. now, about the old technology once again in the BMW. To reduce the consumption of gas is all good!

 





 

And if in the pilot 431-strong "six" safety car BMW M4, which travels on the track in motorcycle racing the MotoGP series, designers using conventional water injection into the intake manifold, three-cylinder turbo 1.5, they went further: using a specially designed fuel pump Bosch high pressure after 4000 rpm, the water is admixed to the gasoline, and the resulting "cocktail" through a special injector is injected into the combustion chamber. This gave 201-horsepower motor extra 14 HP And with the reduced risk of detonation, the compression ratio increased from 9.5:1 to 11.0:1, which significantly increased efficiency at low and medium loads.

Water consumption at the same time — up to 1.5 liters per "hundred", "aquababe" — 7 L. So, when driving at high speed when the moisture is consumed intensively, every five hundred kilometers will have to stop and pour the distillate? After all, ordinary water can not be used: motor overgrown with scum, like a kettle.

However, if the air-conditioning on, the system automatically replenishes the condensate from the climate system — in the summer it produces up to 1.5—2 liters per hour. What to do in the winter, drain the water and dry the paddles? The engineers smiled and said: no, after stopping the engine all the water is pumped into a special container, not afraid of freezing and thawing after launch.

 





That's the way the combined system of injection of gasoline and water: water is supplied to the intake manifold, and after 4000 rpm — also in the cylinder along with the fuel

 

It all started in order to reduce fuel consumption: the BMW engineers promise "to 8%" in the combined cycle. After a quick ride on palyanovskoye ring Miramas on an experimental three-cylinder "unity" on-Board computer revealed 9 l/100 km. not Bad, but... Not a revolution.

Therefore, no hybridization will not do. So at the beginning of next year should receive a rechargeable hybrid the BMW Active Tourer second series is the closest relative of the flamboyant BMW i8 (AR No. 10, 2014). In the back — almost the same powerplant, but are "backwards". Between the front (not the rear as i8) wheels — three-cylinder 1.5 turbo engine, derated to 136 HP and 220 Nm, mated to six-speed "automatic" Aisin. And on the rear axle — the electric motor (88 HP, 165 Nm) with a battery of 7.7 kWh.

By default, the hybrid zadneprovye silently moves off and goes on electric. But when trying to accelerate more active immediately revives the tachometer needle is almost soundless wakes petrol "three". If you press the eDrive button, elektronike can accelerate to 130 km/h Or leisurely drive of 38 km.

In Sport mode all motors working together — including... generator is equipped with enhanced belt drive. Under intense accelerations, it turns into an extra 20-horsepower electric motor. Wow, the acceleration to "hundreds" in just 6.5 seconds! Just like the most powerful version of 225i (231 HP), although benzoelektrosila Active Tourer and heavier than 150 pounds. And I agree with my colleague Wind (AR No. 10, 2015): even a hybrid minivan in the BMW managed to set up in the automobile provocatively. Average fuel consumption in the European test cycle for plug-in hybrids, the assurances of the engineers — only 2 l on 100 km.

Now compatible water injection hybrid "appendage" — and get super eco BMW. However, consuming three substances: gas, water and electricity!

But these superhybrid the Bavarians still silent. Yes, and do not enjoy in Russia demand for cars with benzoelektrosila installations. But the BMW with the "aquamotor" certainly we will have serial production of engines with a combined injection should begin in the next year. By the way, according to engineers, these motors for us, the Russians, even better than conventional turbines: they are not so demanding on the quality and octane number fuel.

 







The greater the turnover, the higher the efficiency of use of water injection. When driving with the maximum speed possible to save up to 20% fuel

Despite the location in the feed motor, the traction battery and power electronics, the size of the trunk of a minivan BMW Active Tourer when hybridization has not diminished. published

P. S. And remember, only by changing their consumption — together we change the world! © Join us at Facebook , Vkontakte, Odnoklassniki

 

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