HISTROY

Angelo Di Pietro (1950, Avellino, Italy) is an engine designer who +developed the Di Petrol Motor air engine. He qualified as congegniatore mechanics in Avellino and moved to Stuttgart to work on the winkle rotary engine at the Mercedes Benz research laboratory 1969 and 1970.in 1971 he migrate to Australia where he established a construction engineering company.

From his early experience with winkle rotary engines, Angelo became interested in developing a more efficient engine than the traditional reciprocating internal combustion engine, and he has worked on various alternative concepts intermittently over the last 30 years. In 1999 he made a major design breakthrough with a winkle rotary motor which runs on compressed air. Di Pietroclaims that his engine is 100% more efficient than competitors’ product and that the reduction in friction will allow the engine to turn with a pressure of 1 phi.

Angelo Di Pateros targeted locations in which automotive vehicles are required but cause immense health hazards such as product markets and warehouse. Angelo Di Pateros was determined to find an alternative that was both environmentally conscious, comparable in desired power,and inexpensive.

Angelo Di Petrol Director of R & D said:“There is no other motor is as good as ours, years of research and analyzing other motors around the world gave me the confidence and obligation to say so. Obligation is the sense that people have been weighting for ages in relation to efficiency in order to take care of our environmental situation.100% more efficiency that our competitor is a very serious claim and should not be confused with some kind of publicity stunt here the interest is purely to try and make money out of some ridiculous claim. The concept has the capability to change the method we use for transporting, apart from the benefits of energy saving in stationary applications.

  1. We have verification of its performance.
  2. We have patents issued.
  3. It has outstanding efficiency.
  4. It has constant high torque.
  5. It has low parts counts.
  6. It has low number of moving parts.
  7. It has compact and light.
  8. It has virtually no frication.
  9. It has virtually no vibration.
  10. It has smooth seed control characteristics.
  11. Only 1psi of pressure is needed to overcome the frication.

CHAPTER-1

INTRODUCTION OF THE PROJECT

A PROJECT IS NOT A PHYSICAL OBJECTIVE NOR IS THE END RESULT.

It has something to do with a definite mission generate activities involving a verity of human resources all directed towards the fulfillment of the mission end stop once the mission fulfilled.

1.1 MEANING OF PROJECT:

P: Potentials

R: Rate of return/risk

O: Opportunities

J: Judgment on

E: Expectation

C: Cost components

T: Time factor

1.2 OBJECTIVES:

Nowadays more stress lay on engineers to become entrepreneurs hence the study of project planning has become very important & for this reason most of the institute have introduces the project work in their syllabus. The project has following objectives:

  1. The project work enables the students to work in group.
  2. It enables the students to use their technical knowledge in practical situation.
  3. One can develop ability to plan to work & take appropriate division.
  4. It develops confidence & creative thinking.
  5. It helps to arrive at creative solution of a problem.
  6. Students can understand their strength & weakness.

1.3 AIMS OF THE PROJECT WORK

  1. To develops planning & decision making skill.
  2. To integrate & rain force skills required the students in separate subject.
  3. To provide interdisciplinary studies of the subject.
  4. To develop higher level of skills for solution of the project.
  5. To develop ability to work in team positively.

1.4 ENGINE:

The distinctive feature of our civilization today, one that makes if different from all other, is the wide use of mechanical power at one time, the primary source of power for the work of peace or war was chiefly man’s muscles. Later, animal were trained to help and afterward the wind and the running stream were hardness. But the great step was taken in this direction when man learned the art of energy conversion from one form to another.

The machine which does this job energy conversion is called an engine. An engine is devices which transform one form of energy into another form of energy. However, while transforming energy from one form to another, efficiency of conversion plays an important role.

1.5 CLASSIFICATION OF ENGINE:

1.5.1Non- Combustion Engine:

In these type of engine not combustion of any fuel these types of engine is known as no emissive engine or non-combustion engine

  1. Air compressed engine.
  2. Pneumatic engine.

1.5.2 External Combustion Engine:

In this case, combustion of fuel takes place outside the cylinder as in case of steam engines where the heat of combustion is employed to generate steam which is used to move a piston in a cylinder.

Other examples of external combustion engines are hot air engines, steam turbine and closed cycle gas turbine. These engine are generally used for driving locomotives, ships, generation of electric power etc.

  1. Steam turbine
  2. Steam engine

1.5.3 Internal Combustion Engine:

In these case, combustion of the fuel with air occurs within the cylinder if the engine. The internal combustion engines group includes engines employing mixtures of combustible gases air, known as gas engines, those lighter liquid fuel or sprit known as petrol engines and those using heavier liquid fuel, known as oil compression ignition or diesel engines.

  1. S.I.(Spark Ignition) Engine
  2. C.I.(Compression Ignition) Engine

S.I. and C.I. engine have classified in the 4-stroke and 2-stroke.

A. 4-stroke

In 4-stroke engine, the cycle of operation is completed in four stroke of piston or two revolution of the crankshaft, during the four strokes, there are five events are completed viz. suction, compression, combustion, expansion, exhaust. Each stroke consists of 180 of crankshaft rotation and hence a 4-stroke cycle is completed through 720º of crank rotation.

Table 1.1 Configurations of 4-stroke engine.

Inlet stroke / /
  • Inlet valve remains open
  • Exhaust valve remain closed
  • Mixture of fuel and air is inlet in cylinder
  • Piston movement T.D.C. to B.D.C.
  • The piston is now made one stroke and crankshaft 180 ºof rotation

Compression Stroke / /
  • During this stroke inlet and exhaust valve both remain closed.
  • Piston moves B.D.C. to T.D.C.
  • Fuel and air mixture is compressed up to its clearance volume.
  • Temperature and pressure both are raised

Power Stroke / /
  • Inlet and outlet valve remain closed.
  • Mixture burn and transfer from hot gases.
  • High pressure and temperature gases push down the piston to create motive power.
  • Piston moves T.D.C. to B.D.C

Exhaust Stroke / /
  • Inlet valve remain closed and exhaust valve is open.
  • The piston move from B.D.C. to T.D.C.
  • During this motion, the piston pushes out the burnt gases from the cylinder.
  • The exhaust valve closes at the end of stroke and part of burnt gases called residual gases remain in the clearance volume.

B. 2-stroke

In 2-stroke engine the cycle of operation is completed in two stroke of the piston or the revolution of the crankshaft. Such stroke consists of 180degree of crankshaft rotation and hence a two stroke cycle is completed through 360degree of crank rotation. In this type of engine low efficiency compared to 4-stroke engine. As already mentioned, if the two unproductive stroke the suction and exhaust could be served by an alternative arrangement.

Figure.1.2 four stroke engine

This system manages to pack one power stroke into every two stroke of the piston (up-down).this is achieved by exhausting and recharging the cylinder simultaneously.

The steps involved here are;

  1. Intact and exhaust occur at bottom dead center. Some form of pressure is need, ether crankcase compression or super charging.
  2. Compression stroke: fuel air mix compressed and ignited. In case of diesel: air.
  3. Compressed power piston is pushed downwards by the hot exhaust gases.

Spark ignition twos stroke are small and light for their power output and mechanically very simple; however, they are also generally less efficient and more polluting than their four stroke counterparts. In terms of power per cubic centimeter, a single cylinder small motor application like a two stroke engine produces much more power than an equivalent four stroke engine due to the enormous advantages of having one power stroke for every 360º of crank shafts rotation (compared to 720º in a four stroke motor).

CHAPTER – 2

WORKING

Air compressed engine mainly working in two parts. Inlet Stroke and Power Stroke, Exhaust Stroke

2.1Inlet and Power Stroke:

In two stroke engines cycle operation is completed in two stroke of the piston or one revolution of the crankshaft. In this engine inlet and power stroke both are in one stroke. It will start with inlet and power stroke inlet valve remain open and exhaust valve remain closed. This stage of piston and plunger as shown in fig.2.1. In this position piston move T.D.C. to B.D.C. and plunger position is uncovered inlet valve. Compressed air passes through inside the cylinder. Compressed air is push the piston in downward direction and piston move T.D.C.to B.D.C high pressure air push down the piston to create motive power. In this position the plunger 140 degrees dwell period. Piston move down and energy transfer piston to crankshaft.

Figure.2.1Inlet and Power Stroke

In this stage plunger also be downward direction 80% complete this stroke and inlet valve is closed or covered inlet valve by plunger. During this stroke that the expanding compressed air creates a shock wave which we receive hear as a slow sound noise. In this stroke at last piston is B.D.C. inlet and power stroke is completed. Completed the first stroke crankshaft 180º of rotation completed.

2.2Exhaust Stroke:

At the end of the power stroke it will start exhaust stroke when the piston is at the bottom dead center. The piston move from D.B.C.to T.D.C. and during this motion. Inlet valve is closed or inlet valve covered by plunger. Exhaust valve is remaining open but the plunger also at the B.D.C. this position of plunger 140º revolution of dwell period in B.D.C. This position piston moves upward direction during this motion of the piston push out the air from cylinder. The pressure air falls to atmospheric level. After 140º revolution of plunger move upward direction and exhaust valve also closed or covered by plunger.

Figure.2.2 Exhaust Stroke

The exhaust valve closed at the end of the stroke and part of air is called residual air remain the clearance space. Now this stroke is completed. End of this stroke piston position as top dead center. End of this stroke crankshaft 180º revolution completed after exhaust stroke position of piston and plunger starting the first stroke and this stage one cycle of engine is completed.

Two stroke fuel engine every stroke is power stroke but air compressed engine only one stroke is power stroke. To complete one cycle 360º revolution completed in crank shaft or one revolution completed. In this engine zero percentage pollution will produce.

2.1.1 ADVANTAGES:

  1. Refueling can be done at home using an air compressor or service station. The energy required compressing air is produced at large centralized plant, making it less costly and more effective to manage carbon emission than from individual vehicles.
  2. Compressed air engine reduce the cost of vehicle production, because there is no need to build a cooling system, spark plugs, starter motor or mufflers.
  3. Expansion of the compressed air lower it s temperature; this may be exploited for use as air conditioning.
  4. Some mechanical configuration may allow energy recovery during braking by compressing and storing air.
  5. Zero percentage pollution produce.

2.1.2 DISADVANTAGES:

  1. When air expands in the engine it cools dramatically and must be heated to ambient temperature using a heat exchanger. The heating is necessary in order to obtain a significant fraction of theoretical energy output. The heating necessary in order to obtain a significant fraction of the theoretical energy output. The heat exchanger can be problematic; while it performs a similar task to an intercooler for a internal combustion engine, the temperature between the incoming air and the working gas is smaller. in heating the stored air ,the device gets very cold and may ice up in cool, moist climates.
  2. Conversely, where air is compressed to fill the tank it heated up: as the stored air cools, its pressure decrease and available energy decrease. it is difficult to cool the tank efficiently while charging and thus it would either take a long time to fill the tank, or less energy is stored.

CHAPTER – 3

PARTS DETAIL

3.1 PISTON

A piston is fitted to each cylinder as a face to receive air pressure and transmit the thrust to the connecting rod.

Figure3.1 Piston

Material EN-8D (ms)

A piston is a component of reciprocating engines, pumps and gas compressor. Located in a cylinder is made gas tight by piston rings. In a engine, it purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and/or connecting rod. In a pump, the function is received and force is transmitted from the crank shaft to the piston for the purpose of compressing or ejective the fluid in the cylinder. In some engine, the piston also acts as a valve by covering and uncovering ports in the cylinder walls.

3.2 CYLINDER BLOCK

The cylinder block is the main supporting structure for the various components the cylinder of a malty cylinder engine is cast as a single unit, called cylinder block. The cylinder head is mountain on the cylinder block. The cylinder head and cylinder block are provided with water jacket in the case of water cooling or with cooling fins in the case of air cooling. Cylinder head gas kit is incorporated between the cylinder block and cylinder head.

Figure3.2 Cylinder Block

Material =IS- 2062 Gr-B(ms)

The cylinder head is tight to the cylinder block by number of bolts or studs. The bottom portion of the cylinder block is called crankcase. A cover called crankcase which becomes a sump surface of the cylinder block which is machined and finished accurately to cylinder shape is called bore or face.

3.3FLYWHEEL

A flywheel is a mechanical device with a significant moment of inertia used as a storage device for rotational energy. Flywheels resist changes in their rotational speed, which helps steady the rotation of the shaft when a fluctuating torque is exerted on it by its power source such as that caused by a piston-based (reciprocating) engine, or when an intermittent load, such as the motion of a piston pump, is placed on it. Flywheels can be used to produce very high power pulses for experiments, wheredrawing the power from the public network would produce unacceptable spikes. A small motor can accelerate the flywheel between the pulses. Recently, flywheels have become the subject of extensive research as power storage devices for uses in vehicles and power plants.

Figure3.3 Flywheel

MATERIAL IS- 2062 Gr-B

The main function of a fly wheel is to smoothen out variations in the speed of a shaft caused by torque fluctuations. If the source of the driving torque or load torque is fluctuating in nature, then a flywheel is usually called for. Many machines have load patterns that cause the torque time function to vary over the cycle. Internal combustion engines with one or two cylinders are a typical example. Piston compressors, punch presses, rock crushers etc. are the other systems that have fly wheel. Flywheel absorbs mechanical energy by increasing its angular velocity and delivers the stored energy by decreasing its velocity

3.4 CONNECTING ROD

The connecting road is the intermediate member between the piston and the crankshaft. Its primary function is to transmit the push and pull from the piston pin to the crank pin and thus convert the reciprocating motion of the piston in to the rotary motion of the crank. The usual form of the connecting road in internal combustion engines as shown in fig it consist of long shank, a small end and a big end.

Figure3.4 Connecting Rod

MATERIAL EN-3A/C-20

3.4.1 FORCE ACTING ON THE CONNECTING ROD

The various forces acting on the connecting rod are as follows.

  1. Force on the piston due to gas presser and inertia of the reciprocating parts.
  2. Force due to inertia of the connecting rod or inertia bending forces.
  3. Force due to friction of the piston ring and of the piston, and
  4. Force due to friction of the piston pin bearing and crankpin bearing

We shall now drive the expression for the force acting on a vertical engine.

3.5 CRANK

Crank in mechanical engineering, a bend portion of axle or shaft, or an arm keyed at right angle to the end of the shaft, by which motion is imparted to or receive from it.

Figure3.5 CRANK

MATERIALEN-3A/C-20

3.6 CAM

These are made as integral part of the crankshaft and are designed in such a way to open the valves at the correct timing to keep them open for the necessary duration.

Figure3.6 Cam

MATERIALEN-3A/C-20

3.6 CRANK SHAFT

As the pistons collectively might be regarded as the heart of the engine , so the crank shaft may be considered is backbone. The crankshaft is the part of the engine that transforms the reciprocating motion of the piston to rotary motion.

Figure3.6 Crank Shaft

  1. Each hole is located and drilled.
  2. Each surface is rough machined.
  3. The crankshaft, with the exception of the bearing journals, is plated with alight coating of copper.
  4. The bearing journals are case –hardened.
  5. The bearing journals are ground to size.
  6. Threads are cut in to necessary bolt holes.

3.7 PLUNGER