Spark-ignition engine

About: Spark-ignition engine is a research topic. Over the lifetime, 4352 publications have been published within this topic receiving 66550 citations.

Novel approaches to improve the gas exchange process of downsized turbocharged spark-ignition engines: A review

Abstract: Engine downsizing, which is the use of a smaller engine that provides the power of a larger engine, is now considered a mega-trend for the internal combustion engine market. It is usually achieved using one or more boosting devices including a supercharger or a turbocharger. Although supercharging is beneficial for engine’s transient response, turbocharging technology is more widely adopted considering its advantages in fuel efficiency. Compared to turbocharged compression ignition engines, turbocharged spark-ignition engines tend to be more challenging with respect to the gas exchange process mainly due to their higher pumping loss, the need for throttling and the fact that spark-ignition engines demand more controllability due to the mitigation of knock, particularly with regard to minimizing trapped residuals. These challenges encourage the entire gas exchange process of turbocharged spark-ignition engines to be regarded as a complete air management system instead of just looking at the boosting system...

Advanced dynamic spark ignition engine modelling for diagnostics and control

Abstract: For years, control engineers have used engine models with constant mass moments of inertia to simulate internal combustion engines. These models showed satisfactory results at low–speed operations but deviated from real engine operations at high speed. Also, there are some problems in using the constant inertia models for engine diagnostics because of inaccurate estimates of inertial forces at high speed, and many of the components that degrade or fail in an engine are not modelled with that methodology. In this paper, two approaches are used to formulate more accurate nonlinear engine models; one applies the Newtonian method; the other uses the Lagrangian method to derive the nonlinear governing equations for internal combustion engine kinematics and dynamic forces. Also included is the discussion of the discrepancy between the nonlinear time–varying inertia model and previous constant inertia model in their shaft velocity and acceleration fluctuations, and in the reconstructed cylinder pressure using the Sliding Observer.

Factors Influencing Combustion Chamber Wall Temperatures in a Liquid-Cooled, Automotive, Spark-Ignition Engine:

Abstract: The influence on cylinder head temperatures of parameters such as cylinder head material, coolant composition, pressure, temperature and velocity was investigated. Each of these parameters was systematically varied and its influence on combustion chamber wall temperature measured. Good agreement is shown between the measured values and corresponding predictions from a heat transfer model incorporating forced-convective, sub-cooled, nucleate boiling. The results suggest that nucleate boiling can play an important role in the transfer of heat from cylinder head to coolant.