Image 3 of 3 from Combination 2-stroke and 4-stroke engine

November 21, 2005 The 2/4SIGHT engine concept is based on an innovative combustion system combined with advanced valve train and control technologies, enabling automatic switching between two- and four- stroke operation. By matching the control strategy to make best use of the 2/4SIGHT engine’s capabilities, simulation studies have shown that the concept has the potential to deliver up to 30 per cent better fuel consumption and reduced CO2 emissions, compliance with Euro 4 and future emissions standards and attractive driving characteristics, with class leading torque delivery. A detailed 2.0 litre V6 gasoline engine design has now been completed which is intended to deliver levels of performance and driveability more usually associated with 3-4 litre V8. Ricardo and its partners intend to build and test the first concept demonstrator engine in mid 2006.