Two Stroke Engine Valve timing Diagram II Valve Timing Diagram II two stroke valve timing diagram

Описание: Two Stroke Engine Valve timing Diagram
#MarineEngineering
#TwoStrokeEngine
#ValveTimingDiagram
#PortTiming
#MarineEngine
#MarineDieselEngine
#MEOExam
#MarineCadet
#ShipEngineering
#ICEngine
#MerchantNavy
#GME
✔ Two stroke engine working principle
✔ Valve (Port) timing diagram explanation
✔ Inlet, transfer & exhaust port timing
✔ TDC & BDC positions
✔ Difference between 2-stroke and 4-stroke engines
✔ Mechanical engineering basics made easy✔ Two stroke marine engine working principle
✔ Valve (Port) timing diagram explained
✔ Inlet, transfer & exhaust port timing
✔ TDC & BDC in marine engines
✔ Difference between marine 2-stroke & 4-stroke engines
✔ Basics of IC engines for marine use



In a *two-stroke marine engine**, there are **no valves**; instead, **ports* are used. The **complete cycle is completed in one crankshaft revolution (360°)**.

*1. Inlet Port:*
The inlet port opens *slightly before Bottom Dead Center (BDC)* to allow fresh charge (air or air-fuel mixture) into the crankcase. It closes **after Top Dead Center (TDC)**.

*2. Exhaust Port:*
The exhaust port opens *before BDC* to release burnt gases from the cylinder. It closes *after BDC* during the upward movement of the piston.

*3. Transfer Port:*
The transfer port opens **after the exhaust port opens**, allowing fresh charge from the crankcase into the cylinder. It closes **before TDC**.

*Working Summary:*
When the piston moves **downward**, power is produced and exhaust gases escape. Fresh charge enters through the transfer port. During the **upward movement**, compression takes place and the fresh charge is drawn into the crankcase.