Flow With Variable Specific Heats in The Exhaust Pipe System Of The Internal Combustion Engine

Polóni, Marián; Winterbone, D. E.; Nichols, Jeffrey

doi:10.4271/885094

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…numerical simulations based on the gas dynamics model of the engine intake system and a combined method based on the measured signals coupled with numerical modelling. 15–18 The results indicate that these methods can meet the requirement of practical applications of IC engines, and the precision 19 of these methods can reach within 5%. As another key parameter of engine, the instantaneous AFR was also of concern to many scientists and engineers, and a number of reports about the identification, the precise control and the quick adjustment of the instantaneous AFR have been published.…”

Section: Introductionmentioning

confidence: 87%

A hybrid method of tests coupled with simulations used to detect the working processes of an automotive engine from cycle to cycle in transient conditions

Yuan

Liu

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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To improve the actual performance of an automotive engine, an approach consisting of dynamic signal measurements coupled with gas dynamics–thermodynamics process simulations is proposed; this is used to detect the working processes of an automotive engine from cycle to cycle in transient conditions. Based on the working principles and the mathematical models of the proposed detection method, corresponding software was developed, and the reliability of this approach was validated on an automotive engine. Automotive road tests were conducted, and various transient parameters of the engine were successfully detected from cycle to cycle by using the developed software. On this basis, the variations in the influencing factors of and the interactions between various engine parameters were analysed. The results showed that the ignition timing has a strong effect on the indicated thermal efficiency. Where there is an unnecessary delay in the ignition timing, there is a decrease in the indicated thermal efficiency. The pumping mean effective pressure is approximately equal to the difference between the exhaust gas pressure and the intake gas pressure for a low to medium load, but it is much higher than the pressure difference and undergoes great fluctuations in the high-speed and high-load operating regions. Both the presented approach and the research results are significant for improving the engine performance in transient conditions.

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Section: Introductionmentioning

confidence: 87%

A hybrid method of tests coupled with simulations used to detect the working processes of an automotive engine from cycle to cycle in transient conditions

Yuan

Liu

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Figure 8 illustrates schematically into duct 1 from the atmosphere during 720°(1 cycle) of revolution was saturated. To validate the theoretical formulation, results obtained for 1500 r/min were compared with the available experimental results [25]. This comparison is shown in Fig.…”

Section: Figmentioning

confidence: 99%

Performance evaluation of a magnetorheological fluid variable valve

Hirani

Manjunatha

2007

Proceedings of the Institution of Mechanical Engineers, Part D:

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The present paper describes the conceptual design, simulation, and fabrication of a magnetorheological (MR) fluid variable-valve actuation (WA) system. Two set-ups, one for testing the conceptual design and the other for application of the MR valve on a real engine, have been developed. The test set-up measures the displacement of the valve, which operates by the cam-follower mechanism. The results of valve lifts at different speeds and control currents are presented. To implement the MR fluid VVA system, a four-stroke single-cylinder Kirloskar TV1 vertical diesel engine has been selected. Inlet and exhaust manifolds have been modelled to estimate volumetric efficiency. The equations governing the unsteady air flow in the ducts have been solved using the method of characteristics. A numerical code to simulate the entire gas exchange process has been developed, and the results have been compared with the experimental results. Further, this code has been used to identify the optimal valve lift requirements of the engine at various crankshaft speeds. The quantified requirements obtained have been used for the design of an MR fluid VVA system. A prototype MR VVA system has been developed. Experimental results are reported in the form of maximum valve lift variation with speed and d.c. current. fluid (MRF-336 AG) with an operating range of −40°C to 150°C has been used. India. email: hirani@iitb.ac.in JAUTO408

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Quantitative study on in-cylinder combustion and heat release characteristic parameters of gasoline engine based on single variable sweeping tests

Liu

Zhu

et al. 2017

Applied Thermal Engineering

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Flow With Variable Specific Heats in The Exhaust Pipe System Of The Internal Combustion Engine

Cited by 6 publications

References 3 publications

A hybrid method of tests coupled with simulations used to detect the working processes of an automotive engine from cycle to cycle in transient conditions

A hybrid method of tests coupled with simulations used to detect the working processes of an automotive engine from cycle to cycle in transient conditions

Performance evaluation of a magnetorheological fluid variable valve

Quantitative study on in-cylinder combustion and heat release characteristic parameters of gasoline engine based on single variable sweeping tests

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