论文信息 - A Study of the Performance of a SI Engine Incorporating a Hydraulically Controlled Variable Valve Timing System

A Study of the Performance of a SI Engine Incorporating a Hydraulically Controlled Variable Valve Timing System

In the first stage of the work, the hydraulic mechanism which controls the anticipated closure, has been designed by means of a mathematical model, adjusted with empirical data obtained from laboratory tests about the hydraulic behaviour of the main components: flow coefficients and time dependent behaviour of the electrical-hydraulic ports. A computational study of realistic variable valve timing engine performance was carried out by means of a wave action model based on the method of characteristics

[1] F Boada,et al. Reduction of Pumping Losses By the Use of a Variable Valve Timing System , 1984 .

[2] R. S. Benson,et al. A numerical solution of unsteady flow problems , 1964 .

[3] R. S. Benson,et al. Steady and Non-Steady Flow in a Simple Carburettor , 1974 .

[4] R. H. Sherman,et al. The Influence of Induction and Exhaust Processes on Emissions and Fuel Consumption in the Spark Ignited Engine , 1977 .

[5] F. Boada,et al. Modifications to the Method of Characteristics for the Analysis of the Gas Exchange Process in Internal Combustion Engines , 1986 .

[6] James Tuttle,et al. CONTROLLING ENGINE LOAD BY MEANS OF LATE INTAKE-VALVE CLOSING , 1980 .

[7] Ronald J. Herrin,et al. A Lost-Motion, Variable-Valve-Timing System for Automotive Piston Engines , 1984 .

[8] Alfons Crespo,et al. Microprocessor-Based Control of Engine Valve Timing , 1983, IEEE Transactions on Industrial Electronics.

[9] A. C. Elrod,et al. Development of a Variable Valve Timed Engine to Eliminate the Pumping Losses Associated with Throttled Operation , 1986 .

[10] Seinosuke Hara,et al. Effects of intake-Valve Closing Timing on Spark-Ignition Engine Combustion , 1985 .

[11] F. Payri,et al. CALCULATION MODEL FOR THE OPTIMIZATION OF A VARIABLE DISTRIBUTION (REDUCTION OF THE PUMP-LOSSES) , 1984 .