Automotive Variable Engine Valve Lift Mechanism Controlled by a Hydraulic 3-Step Rotary Actuator
نویسندگان
چکیده
منابع مشابه
Design and Performance Evaluation of an Electro-Hydraulic Camless Engine Valve Actuator for Future Vehicle Applications
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 elimin...
متن کاملSingle-Cylinder Engine Tests of a Motor-Driven, Variable-Valve Actuator
A novel mechanism concept for a fully flexible, motordriven, cam-actuated engine valve was reported in [1]. It is capable of i) variable valve timing, ii) variable lift and iii) individual valve phasing control. To check the validity of the concept in real engine environment, engine tests were performed using a single-cylinder of a modified sixcylinder 3.8-liter production engine, with the new ...
متن کاملGeometric Optimization of a Hydraulic Motor Rotary Valve
The performance of a hydraulic motor is strongly influenced by the timing, leakage, and friction of the valves connecting to the pressure and tank ports. For the application of a linkage-based hydraulic piston motor, a novel clearance sealed cylindrical rotary valve is introduced. A model of the cylinder pressure dynamics is formulated from bulk modulus definition and solved using a variable-st...
متن کاملGas Flow into Rotary Valve Intake and Exhaust Mechanism in Internal Combustion Engine
Simple design of a rotary valve system is capable of controlling intake and exhaust gases, which will eliminate the need of known complex mechanisms. The cost of material and production, maintenance, and noise level of the system can be further reduced. The new mechanism enables the elimination of the overlapping of valves work that reduces gas leakage. This paper examines theoretically the gas...
متن کاملElectromechanical Valve Actuator with Hybrid MMF for Camless Engine
As one of variable valve timing (VVT) approaches, the electromechanical valve actuator (EMVA) uses solenoid to actuate valve movement independently for the application of internal combustion engine. This paper proposed an EMVA structure by incorporating the hybrid magneto-motive force (MMF) implementation in which the magnetic flux is combined by the coil excitation and permanent magnets. Makin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN FLUID POWER SYSTEM SOCIETY
سال: 2010
ISSN: 1880-3121,1349-7022
DOI: 10.5739/jfps.41.1