TOPICS

• Definition of basic problems associated with engines with fixed valve timing
• General theory and potential system benefit of varying valve timing
• Difference between Variable Cam Timing (VCT) and Variable Valve Timing (VVT)
• Definition of the various operational modifications and benefits of their implementation
• Review of general mechanisms to implement VCT and VVT systems
• Modern approaches to VCT systems
• Modern approaches to VVT systems
• Theoretical benefits and practical results

LEARNING OBJECTIVES

• Describe general theory and potential system benefit of varying valve timing
• Recognize the difference between Variable Cam Timing (VCT) and Variable Valve Timing (VVT)
• Review historical mechanisms to implement VCT and VVT systems
• Examine modern approaches to VCT and VVT systems
• Fully understand the mechanism by which VCT and VVT can improve system performance
• Appreciate the contribution VCT and VVT can make to the overall system operation in a modern internal combustion engine