Project details:
Name: Direct Injection In Two-Stroke Engine.
Team size: 6
Project leader: K.Jaya Chandran
Team members:
1, S.Hariharan
2, V.Lakshmaswamy
3, M.Rajesh Kumar
4, P.Subramani
5, C.Vijay Kumar
Objective :
To develop a high performance engine which has the advantages of both two-stroke and four-stroke engine by combining the features of both the engines like simpler construction, better lubrication, high power, lower emission, better scavenging, etc..
Apparatus Details
Make Of The Engine: Yezdi
Displacement: 250 Cc
Lubrication System: Petroil Lubrication
Fuel Supply System: Carburretor.
Alterations Required:
Fuel supply system: direct injection using fuel pump and injectors
Lubrication system: crankcase lubrication system (splash type)
Equipments Required For Alteration :
Fuel Injection Pump
Injector
Cam Lobe
Air Filter (To Filter Lubrication Oil)
Project Details
Project Approach:
The project is to be executed through Two Modules to facilitate the proper functioning of the engine.
Module One ---- Crank Case Lubrication
Module Two ---- Fuel Injection
Module 1: Crankcase Lubrication.
This module is primary step in the execution of the project. This module basically deals with the lubrication system. For the proper functioning of any mechanical equipment lubrication is important.
Execution Procedure:
The crankcase of the engine is filled with a certain quantity of lubricating oil of required grade (20w/40) and a fibre wool filter is used to filter the oil contents, which is present in the compressed air. The fibre wool filter is positioned in between the crankcase and the transfer port.
Module 2: Fuel injection
Fuel (petrol only) is supplied to the combustion chamber (cylinder) through a diesel pump via fuel injector. The fuel is injected after the piston passes the BDC and the injected fuel quantity is controlled the throttle control in the fuel injection pump. The will be evenly distributed and mixes with the compressed air coming from transfer port. Only a very small quantity of fuel escapes with the exhaust gases (better scavenging & lesser fuel wastage).
Execution Procedure:
A fuel injection pump is mounted in the engine. It is driven by a cam lobe, which is coupled to crank shaft through fasteners. The output line of the fuel injection pump is connected to the fuel injector, which injects the fuel into the cylinder.
Timing of the fuel injection is adjusted and set to such a position that the fuel is injected after the B.D.C position of the piston for optimum performance. Quantity of fuel injected is adjusted to required volume, which can be calculated by trail & error method.
