PORT TIMING DIAGRAM FOR 2S ENGINE
Aim :
To draw the port timing diagram of given two stroke cycle petrol engine .
Apparatus Required :
1. Two stroke petrol engine
2. Measuring tape
3. Chalk
Theory and Description :
In the case of two stroke cycle engines the inlet and exhaust valves are not present . Instead , the slots are cut on the cylinder itself at different elevation and they are called ports. There are three ports are present in the two stroke cycle engine .
1. Inlet port
2. Transfer port
3. Exhaust port
The diagram which shows the position of crank at which the above ports are open and close are called as port timing diagram.
The extreme position of the piston at the bottom of the cylinder is called " Bottom Dead centre " [BDC] . The extreme position of the piston at the top of the cylinder is called "TOP dead centre " [TDC ]
In two stroke petrol engine the inlet port open when the piston moves from BDC to TDC and is closed when the piston moves from TDC to BDC .
The transfer port is opened when the piston is moved from TDC to BDC and the fuel enters into the cylinder through this transport from the crank case of the engine . The transfer port is closed when piston moves from BDC to TDC . The transfer port opening and closing are measured with respect to the BDC .
The exhaust port is opened , when the piston moves from TDC to BDC and is closed when piston moves from BDC to TDC . The exhaust port opening and closing are measured with respect to the BDC.
Procedure :
1. Remove the ports cover and identify the three ports .
2. Mark the TDC and BDC position of the fly wheel . To mark this position follow the same procedure as followed in valve timing diagram .
3. Rotate the flywheel slowly in usual direction (usually clockwise ) and observe the movement of the piston
4. When the piston moves from BDC to TDC observe when the bottom edge of the piston . Just uncover the bottom end of the inlet port . This is the inlet port opening (IPO) condition , make the mark on the flywheel and measure the distance from TDC
5. When piston moves from TDC to BDC observe when the bottom edge of the piston completely covers the inlet port . This is the inlet port closing (IPC) condition . Make the mark on the flywheel and measure the distance from TDC .
6. When the piston moves from TDC to BDC , observe , when the top edge of the piston just uncover the exhaust port . This is the exhaust port opening [EPO] condition . Make the mark on the flywheel and measure the distance from BDC .
7. When the piston moves from BDC to TDC , observe , when the piston completely cover the exhaust port ,. This is the exhaust port closing condition [EPC] . Make the mark on the flywheel and measure the distance from BDC .
8. When the piston moves from TDC to BDC observe, when the top edge of the piston just uncover the transfer port . This is the transfer port opening [TPO] condition . Make the mark on the flywheel and measure the distance from BDC
9. When the piston moves from BDC to TDC , observe , when the piston completely covers the transfer port. This is the transfer port closing [TPC] condition . Make the mark on the flywheel and measure the distance from BDC .
Note : 1. The inlet port opening distance and closing distance from TDC are equal .
2. The exhaust port opening distance and closing distance from BDC are equal .
3. The transfer port opening distance and closing distance from BDC are equal .
Result :
The port timing diagram for the given two stroke cycle petrol engine was drawn.
Jason
valve timing diagram of two stroke engine
diagram of timing marks 2c engine toyota
To start timing on the 2C Turbo diesel engine, you will have to locate or distinguish camshaft timing marks.
what year lt is the engine also is it 5or 6 cylinder
Mitsubishi lancer 4d68 engine diesel injection timing Mitsubishi lancer 4d68 engine diesel injection timing
where is the nissan laurel diesel rd28 engine timing mark
In diesel engine ,air alone without any fuel is drawn by the falling piston during inlet stroke. In petrol engine, the mixture of air and fuel is drawn in by the falling piston during inlet stroke. There is no difference in the act of actually setting the timing. Inlet valves open slightly before the piston reaches top dead centre, by how much depends on the manufacturers specifications.
Bore to stroke ratio is a primary consideration. Valve timing (and in the case of a fuel injected engine, the injection timing) will also affect the engine's "power band" rpm range. For a given displacement, longer stroke = smaller bore dia, more torque and lower rpm. Diesels are more efficient if they have a lower rpm because the diesel fuel takes longer to burn. So the diesel engine will normally be designed for lower rpm.
If you are referring to ignition timing, diesel ignition timing is primarily controlled by the injector timing. This is also why diesel engines run such high injector pressures. The timing is very carefully controlled by the vehicles computer.
Get a manual from AUTOBOOKSONLINE.COM
Chain.