One of the most difficult challenges in engine technology today is the urgent need to increase engine thermal efficiency. In the first approach, the engine captures the heat lost from the four-stroke Otto cycle or Diesel cycle and uses it to power an additional power and exhaust stroke of the piston in the same cylinder. The pistons in this type of six-stroke engine go up and down six times for each injection of fuel. Fresh water is injected into the cylinder after the exhaust stroke and is quickly turned to superheated steam, which causes the water to expand to 1400-1600 times its volume and forces the piston down for an additional stroke. A cooling system also serves to maximize volumetric charge efficiency by reducing the temperature of the charge during intake. This design also claims to reduce fuel consumption by 35%-40%.

1. WATER INJECT SIX STROKE
ENGINE
PRESENTED BY:-
SAURABH CHANDRAKAR
SANDEEP PAUL
CHRISTIAN COLLEGE OF
ENGINEERING AND
TECHNOLGY, BHILAI

2.  A six stroke engine describes a number of different approaches in
the internal combustion engine to capture the waste heat from the four
stroke engine and use it to power an additional power and exhaust stroke of
the piston.
 The pistons in this type of six-stroke engine go up and down six times for
each injection of fuel. Fresh water is injected into the cylinder after the
exhaust stroke and is quickly turned to superheated steam, which causes
the water to expand to 1400-1600 times its volume and forces the piston
down for an additional stroke.
 A cooling system also serves to maximize volumetric charge efficiency by
reducing the temperature of the charge during intake. This design also
claims to reduce fuel consumption by 35%-40%.

3.  This engine is more efficient and powerful than the
existing four stroke engines.
 The engine is also having the scope of using heavy
fuels and bio-fuels.
 The engine with varied thermodynamic cycle of
operation has better thermodynamic efficiency,
reduced fuel Consumption, reduced pollution.
 Nearly 40% more fuel efficiency can be obtained

4.  Griffin six stroke engine
 Bajulaz six stroke engine
 Velozeta six-stroke engine
 Crower six stroke engine
 Charge pump engine
 Beare Head Engine

5. GRIFFIN SIX-STROKE ENGINE
• In 1883, the engineer Samuel Griffin was an established maker of steam
and gas engines.
• A major market for the Griffin engine was in electricity generation.
• The key principle of this engine was a heated exhaust-jacketed external
vaporizer, into which the fuel was sprayed.
BAJULAZ SIX-STROKE ENGINE
•The Bajulaz six-stroke engine is similar to a regular combustion engine in
design.
• Reduction in fuel consumption by at least 40%
• Two expansion (work) strokes in six strokes.
•Dramatic reduction in air pollution

6. VELOZETA SIX-STROKE ENGINE
• The Velozeta Six-stroke engine built by the College of Engineering, at
Trivandrum in India.
•In that engine, during the exhaust stroke, fresh air is injected into the
cylinder, which expands by heat and therefore forces the piston down
for an additional stroke.
• The reduction in fuel consumption is 40%.

7. CROWER SIX-STROKE ENGINE
• In a six-stroke engine prototyped in the U.S. by Bruce Crower.
• In the crower engine water is injected into the cylinder after the exhaust
stroke, and is instantly turned to steam, which expands and forces the piston
down for an additional power stroke.
• Crower estimated that his design would reduce fuel consumption by 40% by
generating the same power output at a lower RPM.
• No cooling system required
• It extracts the more power from expansion process.

8. VALVES USED IN ENGINES
• Inlet Valve
• Exhaust Valve
• Water injector
Inlet Valve
It opens to supplied fresh air or air-fuel into the cylinder.
Exhaust Valve
It opens to remove the burned gases and steam from the cylinder.
Water injector
It opens to inject the water into the cylinder with high pressure.

9. THE SIX STROKES
• Intake Stroke
• Compression Stroke
• Power Stroke
• Exhaust Stroke
• Steam Stroke
• Exhaust Stroke

10. FIRST STROKE
During the first stroke the inlet valve is opened and air or air-fuel mixture is sucked
into the cylinder.
SECOND STROKE
During this stroke air or air fuel mixture compressed to the maximum pressure.
THIRD STROKE
This is first power stroke of the engine. This is given by primary fuel (petrol or
diesel or LPG). During this stroke all valves are remains closed.
FOURTH STROKE
During this stroke exhaust valve will be opened and burned gases send out to the
atmosphere through the heat recovery system for warm-up the water.
FIFTH STROKE
In this stroke, Water is injected into the hot cylinder through the steam valve. By
absorbing the heat from cylinder wall, the steam expands causing the piston to
move down.

12. PRESSURE-VOLUME DIAGRAM

13.  It is having high efficiency compared to 4-stroke or 2-stroke
engine.
 Improves a typical engine’s fuel consumption.
 No cooling system required.
 The weight and power loss of most conventional cooling
system parts such as the fan, radiator and coolant pump can be
eliminated.
 High Mechanical efficiency
 Physical engine size reduction
 The higher percentage of power strokes may allow lower
working speeds, with higher torque output at lower and
broader rpm ranges.
 Reduced exhaust emissions per a given power range, CO can
reduce up to 65%.

14.  Heavy & bulky structure of engine.
 Exhaust valve should be re modify.
 Cost comparable to those of a four-stroke
engine.
 Brake power & indicated power per cycle per
cylinder is comparatively lesser

15.  A good engine needs high efficiency, high
performance characteristics, low emission standards.
 It seems that the above mentioned solution meets all
these specified standards.
 This engine is reducing fuel consumption and
pollution without affecting performances drastically.
 It has Up to 40% reduction in fuel consumption and
60% to 90% in polluting emissions, depending on the
type of fuel being used.