Valve dynamics in reciprocating compressors for motor vehicles

Taranović, Dragan; Ninković, Dobrivoje; Davinić, Aleksandar Lj.; Pešić, Radivoje; Glišović, Jasna; Milojević, Saša

doi:10.17559/tv-20151117130112

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…To approximate the real conditions in the cylinder, tribological tests were carried out during the reciprocating sliding of the tribometer steel ball on the sample plate of the tested materials. Figure 3 The tribologically optimized cylinder is part of a reciprocating air compressor within the test bench for recording performance characteristics in laboratory conditions [74]. The test bench for testing the performance of reciprocating air compressors was specially designed to analyze valve plate dynamics caused by stiction under oil presence on the seat and limiter inside the valve construction (Figure 4) [75,76].…”

Section: Tribological Tests Of the Aluminum Cylinder Sliding Surface ...mentioning

confidence: 99%

Particulate Matter Emission and Air Pollution Reduction by Applying Variable Systems in Tribologically Optimized Diesel Engines for Vehicles in Road Traffic

Milojević,

Glišović,

Savić

et al. 2024

Atmosphere

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Regardless of the increasingly intensive application of vehicles with electric drives, internal combustion engines are still dominant as power units of mobile systems in various sectors of the economy. In order to reduce the emission of exhaust gases and satisfy legal regulations, as a temporary solution, hybrid drives with optimized internal combustion engines and their associated systems are increasingly being used. Application of the variable compression ratio and diesel fuel injection timing, as well as the tribological optimization of parts, contribute to the reduction in fuel consumption, partly due to the reduction in mechanical losses, which, according to test results, also results in the reduction in emissions. This manuscript presents the results of diesel engine testing on a test bench in laboratory conditions at different operating modes (compression ratio, fuel injection timing, engine speed, and load), which were processed using a zero-dimensional model of the combustion process. The test results should contribute to the optimization of the combustion process from the aspect of minimal particulate matter emission. As a special contribution, the results of tribological tests of materials for strengthening the sliding surface of the aluminum alloy piston and cylinder of the internal combustion engine and air compressors, which were obtained using a tribometer, are presented. In this way, tribological optimization should also contribute to the reduction in particulate matter emissions due to the reduction in fuel consumption, and thus emissions due to the reduction in friction, as well as the recorded reduction in the wear of materials that are in sliding contact. In this way, it contributes to the reduction in harmful gases in the air.

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Section: Tribological Tests Of the Aluminum Cylinder Sliding Surface ...mentioning

confidence: 99%

Particulate Matter Emission and Air Pollution Reduction by Applying Variable Systems in Tribologically Optimized Diesel Engines for Vehicles in Road Traffic

Milojević,

Glišović,

Savić

et al. 2024

Atmosphere

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A Parametric Analysis of Self-Acting Valves of Reciprocating Compressors Using Mathematical Modeling Methods

Kotlov¹

2019

PoHEI.MB

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One of the important tasks in the design and operation of reciprocating compressors is to ensure energy-efficient and reliable operation of self-acting valves. The requirements of efficiency and reliability are largely competing, the simultaneous satisfaction of which is not always possible. This paper presents a calculation analysis of various factors effecting the operation of self-acting valves in order to select their rational design parameters. The results of the analysis for the valve’s changing parameters (spring stiffness and maximum valve stroke) and the crankshaft rotational speed are presented. The results obtained do not contradict the data previously described in the literature by other authors, namely, that a reduction in the spring stiffness leads to a reduction in the work expended on pushing the gas through the valve and to a delay in closing the valve, therefore resulting in the backflow of gas through the valve. Reducing the crankshaft rotational speed causes flutter, which affects both the parameters of the valve itself and the efficiency of the compressor as a whole.

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Valve dynamics in reciprocating compressors for motor vehicles

Cited by 2 publications

References 4 publications

Particulate Matter Emission and Air Pollution Reduction by Applying Variable Systems in Tribologically Optimized Diesel Engines for Vehicles in Road Traffic

Particulate Matter Emission and Air Pollution Reduction by Applying Variable Systems in Tribologically Optimized Diesel Engines for Vehicles in Road Traffic

A Parametric Analysis of Self-Acting Valves of Reciprocating Compressors Using Mathematical Modeling Methods

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