TWO STROKE FUEL INJECTION SYSTEM IN SI ENGINE

MECHANICAL ENGINEERING

A spark ignition engine, where two stroke engine is disclosed. The engine includes a crankcase with a cylinder adapted to house a piston. At least one transfer duct communicates the crankcase to the cylinder. At least one fuel injector is disposed through a wall of the transfer duct. The fuel injector is positioned to inject fuel tangentially to the cylinder. Direct injection is technology that has shown a great ability to reduce these emissions while at the same time improves fuel economy. A prototype kit has been designed for use in retrofitting existing carbureted two stroke engines to direct injection. To optimize the power and intake port flow produce by the engine modification were through a very limited value. The value is limited due to the restricted area of the engine production by the manufacturer. Hence modification must be planned carefully as over modification of the inlet port can end up with a device slower than its stock counterpart. It was found out experimentally that mechanical thermal efficiency was improved after modification. In other words fuel economy was improved after using the injector.

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