Efficiency enhancement of spark-ignition engines using a Continuous Variable Valve Timing system for load control

• Published in: Energy (Oxford) Vol. 161; pp. 649 - 662
• Main Authors: Osorio, Julian D., Rivera-Alvarez, Alejandro
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 15.10.2018; Elsevier BV
• Subjects: Air intakes; Combustion temperature; Compression; Continuity (mathematics); Continuous Variable Valve Timing Engine (CVVT Engine); Control systems; Dilution; Economic analysis; Efficiency enhancement; Energy efficiency; Engines; Fuel consumption; Fuel economy; Irreversible engine operation; Mathematical models; Otto cycle; Power consumption; Power efficiency; Spark ignition; Throttled Engine; Throttles; Valves; Throttled Engine; Fuel economy; Efficiency enhancement; Irreversible engine operation; Continuous Variable Valve Timing Engine (CVVT Engine)

In this work, a Continuous Variable Valve Timing (CVVT) system for load control in spark-ignition engines is proposed, analyzed, and compared with a conventional Throttle-controlled Engine. An analytical model for ideal processes is initially developed to study the performance of both cycles during...