Current development trends in the field of internal combustion engines aim at regulating all processes of the engine and individual units. A converted diesel to gas engine with Miller thermodynamic cycle is more energy efficient at partial loads than a gas engine with Otto thermodynamic cycle. The Miller cycle engine with variable valve timing and valve lift has been investigated to improve performance and energy efficiency across the load range. The aim of the work is to study the influence of the displacement of the valve timing phases of the intake and exhaust camshafts and the valve lift height on the performance of the gas engine with the Miller cycle. Computer modelling was based on data obtained from the full-scale experiment on the gas engine with the Miller thermodynamic cycle.
Introduction (problem statement and relevance). The object of research in this work is an inline six-cylinder gas engine 6ChN13/15 with a Miller thermodynamic cycle. On the basis of its computer model studies minimization of the specific effective fuel consumption has been reached due to variation study of gas distribution and air supply systems parameters.The purpose of the study was to investigate the parameters regulation effect of gas distribution and air supply systems on the performance of a 6ChN13/15 gas engine with a Miller cycle on the external speed characteristic basing on numerical modeling.Methodology and research methods. The research was carried out by the method of computer simulation. Numerical modeling was made on the basis of data obtained during a full-scale experiment of a 6ChN13/15 gas engine with Miller thermodynamic cycle.Scientific novelty and results. A comparative analysis of a gas engine optimization results has been carried out. The results obtained will be used to create a gas engine and its further optimization by controlling the working process and the air supply system.Practical significance. The results obtained may be of interest to truck car manufacturers and engine specialists.
Introduction (problem statement and relevance). This article presents the thermal calculation results of an in-line six-cylinder highly accelerated engine with a displacement of 13 liters with compression ignition, according to the controlled Miller cycle. The result of the study is the main performance indicators that testify the potential for using the controlled Miller cycle with the intake valves early closing in a highly forced engine as one of the ways to improve energy efficiency.The purpose of the study was to evaluate the effect of valve timing and the intake and exhaust valves lift on the average specific fuel consumption of a highly forced automobile engine with compression ignition at the early stages of design.Methodology and research methods. Computational and theoretical studies were carried out using mathematical modeling of thermodynamic processes in a one-dimensional setting. The reliability of the calculations was verified by comparing the simulation data and the results of experimental studies of the internal combustion engine. To develop the laws of valve lift, the method of sequential nonlinear quadratic programming was used.Scientific novelty and results. The law of valve lift of a highly accelerated automobile engine with compression ignition according to the controlled Miller cycle has been developed, which made it possible to reduce the minimum specific fuel consumption by up to 7.8% in comparison with the basic version of the engine.Practical significance. The developed thermodynamic models make it possible to evaluate the qualitative and quantitative contribution to achieving fuel efficiency through the use of the controlled Miller cycle and obtain initial data in the form of a valve lift law for further work on the development of a valve timing mechanism.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.