Abstract
This paper details the new design and dynamic simulation of an electro-hydraulic camless engine valve actuator (EH-CEVA) and experimental verification with lift position sensors. In general, camless engine technologies have been known for improving fuel efficiency, enhancing power output, and reducing emissions of internal combustion engines. Electro-hydraulic valve actuators are used to eliminate the camshaft of an existing internal combustion engines and used to control the valve timing and valve duration independently. This paper presents novel electro-hydraulic actuator design, dynamic simulations, and analysis based on design specifications required to satisfy the operation performances. An EH-CEVA has initially been designed and modeled by means of a powerful hydraulic simulation software, AMESim, which is useful for the dynamic simulations and analysis of hydraulic systems. Fundamental functions and performances of the EH-CEVA have been validated through comparisons with experimental results obtained in a prototype test bench.
Highlights
The implementation of a fully variable intake and exhaust valve timing control in an internal combustion engine can significantly improve the fuel efficiency, emissions, and power output [1,2].The ability to fully vary engine valve timing provides significant improvements to the generation internal combustion engines
An electro-hydraulic camless engine valve actuator (EH-CEVA) is installed above an intake valve
InInthis paper,aanew newvariable variable valve actuator system, referred to EH-CEVA, as an EH-CEVA, been this paper, valve actuator system, referred to as an has beenhas proposed proposed and its characteristics according to design variations parameterhas variations has been
Summary
The implementation of a fully variable intake and exhaust valve timing control in an internal combustion engine can significantly improve the fuel efficiency, emissions, and power output [1,2]. The ability to fully vary engine valve timing provides significant improvements to the generation internal combustion engines. A camless engine that enables fully variable valve timing control is able to provide increased power, increased fuel efficiency, and overall reduced emissions at the same time [3,4]. When entering a busy expressway, an engine valve timing controller changes the overlap between intake and exhaust valves for greater engine power. When the vehicle is cruising on the expressway at a constant speed, the timing controller alters the valve timing again to reduce power consumption and increase fuel efficiency. Fuel efficiency can be increased by deactivating cylinders that do not need operation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
