Design and Fabrication of Variable Compression Ratio Engine

Abstract

Variable compression ratio is a technology to adjust the compression ratio of an internal combustion engine while the engine is in operation/manually. In scope to lower compression ratio at turbo charging to prevent knocking, switch between efficient or powerful engine, use alternative fuels with varying octane or Cetane numbers and improved NO_X particulate formation. The study comprises of sourced Single-cylinder Petrol engine from Suzuki Access 125 cc. The mechanism used is simple Sliding slotted cavity mechanism, for changing crankshaft’s position. A sophisticated lever-link mechanism is used to control the magnitude of crankshaft’s position controlled by power screw manually or actuator. Further results are verified in motion simulation software and brake dynamometer.