2. CONTENTS
INTRODUCTION
WHY W.I ENGINES
CONSTRUCTION
WORKING
Characteristics
ADVANTAGES
DISADVANTAGES
CONCLUSION
REFERENCE
VIDEO
3. INTRODUCTION
In internal combustion engines, water injection, also known as anti-
detonant injection (ADI), can spray water into the incoming air
or fuel-air mixture, or directly into the cylinder to cool certain parts of
the induction system where "hot points" could produce premature
ignition. In jet engines it increases engine thrust at low speeds and at
takeoff.
4. Why W.I Engines?
To reduce engine thrust.
To attain higher compression ratio.
To reduce engine knocking.
To reduce NOx emission.
5. Construction
Water tank.
Water pump.
Water rail.
Equipped with a combined
injection valve and nozzle that
allows injection of water and fuel
into the cylinder separately.
Electronic engine control unit.
Electronic pump control unit.
6. Working of W.I Engines
precisely designed water injector which
injects a fine spray of water into the
engine combustion chamber through its
intake port.
The water injectors are attached to the
water rail which provides water to the
injectors.
Water injection timing and duration is
electronically controlled by control unit.
Control unit gets the input(ex:Engine
RPM,temrature etc)from the engine
output.
8. ADVANTAGES
Water is available at free of cost.
Increases performance by 5%.
Reduces NOX emission.
13% lower the fuel consumption. OR
Increases fuel efficiency by as much as 13%.
Reduces engine knocking.
Reduces the carbon emission by 4%.
9. DISADVANTAGES
Refilling of water is required.
Freezing of water in water tank.
It is expensive.
Accidentally running out of water makes piston very unhappy.