Technical Paper
The Evaluation of Performance Enhancing Fluids and the Development of Measurement and Evaluation Techniques in the Mitsubishi G-DI Engine
1999-05-03
1999-01-1496
A combination of various different fuel additive qualities and lubricant qualities were evaluated in a Mitsubishi direct injection gasoline engined vehicle over a standardized road test route using a controlled driving regime. The evaluation was conducted using a matrix of a single base fuel combined with two inlet system detergent additives; one prepared using a synthetic fluidiser base and one a mineral oil fluidiser base. In addition a mineral and a synthetic based crank case lubricant were evaluated with clear base fuel only. Engine inlet and exhaust valve deposits and combustion chamber deposits were measured along with regulated emissions, fuel economy and injector fouling. Methods of measuring and evaluating deposit build up in the inlet and exhaust system and combustion chamber were constructed by developing existing Coordinating European Council (CEC) test methods and in house derived test methods and protocols.
