Though water injection technology is not new and it has been
used in air planes and race cars in past. But BMW and Bosch is thinking to make
this technology “mainstream” by using it in more new cars. BMW M4 cars equipped
by this technology were seen as safety cars for Moto GP racing.
So we will be watching in this post how this technology will
bring changes in CO2 emissions, power and fuel efficiency..
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| BMW and Bosch's water injection technology |
Power- BMW M4 GTS produces 75 horsepower more
than base M4, approximately 5%. In formal engines, extra fuel is used to
support cooling system where extra fuel evaporates to keep parts of engine “cool”
That’s how it will improve engine’s efficiency by removing engine’s heating and
knocking. Combustion temperature will be reduced by approximately 25%.
Fuel Efficiency – This technology can reduce fuel
consumption from 8 to 13 % (depends on speed of car, more speed means more
effective this technology is). But like
Fabiana Piazza (global products manager of Bosch) informed Autocar that these
advantages are only seen in forced induction engines which have high specific
output at least 107 horsepower per liter, thus this technology will be very
beneficial for three, four cylinders engines like hot hatchbacks.
How does it work – This
technology functions by
injecting a small fog of water into the intake duct just before ignition of
fuel, in this way this technology saves that “extra fuel” which we waste in
conventional engines. This system only requires 5 liter water tank which is
located under the boot floor of the BMW M4 GTS car. Only 1mm of water is
required for 1km, in this case water tank has to be refilled by every 2500-3000
kms.
Future- Bosch official said “we can say that we
expect the system to make mass production from 2019”. They also see other car
manufacturers using their technology in their own cars.
So hope
for best to save our environment and fuel.
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