The calculus of the technical-economic parameters of a SI direct injection engine

Mitran, Tudor; Blaga, Vasile; Beles, Horia; Dragomir, George

doi:10.26825/bup.ar.2017.009

Cited by 1 publication

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“…Dijagrami prikazani u p-V koordinatama se, računaju pomoću razvijenog programa i na bazi izmerenih veličinama na motoru određena su odstupanja proračuna i merenja. The mathematical equations of transformation that make up the thermodynamic cycle after which spark-ignition engines run are [2], [6]:…”

Section: Indikatorski Dijagrami U P-v Koordinatama Određeni Proračuno...unclassified

The Indicator Diagrams in P-v Coordinates Calculated and Measured on the Engine Stand

Blaga¹,

Blaga²

2022

MVM

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This paper presents the numerical results of a simulation of the thermodynamic cycle for in spark ignition engine (SI) in normal external conditions (T 0 =293 K; p 0 =10 5 Pa) and revolution n=5500 rpm, at full charge. The simulation took in account the constraint for =1, for air pollution reduction whit combustible gases This paper presents the numerical results of a simulation of the thermodynamic cycle for in spark ignition engine (SI) in normal external conditions (T 0 =293 K; p 0 =10 5 Pa) and revolution n=5500 rpm, at full charge. The simulation took in account the constraint for =1, for air pollution reduction whit combustible gases [1]. The indicator diagram was calculated in p-V coordinates, and in p-α coordinates. Equations for thermal processes that take place in the engine were determined and then entered into a computer program. Using these equations, the state parameters were calculated at the characteristic points of the engine cycle. The research was conducted in order to obtain information that could be used improving the characteristics of an engine SI. The operating mode of the engine is defined by the speed of rotation and load, but it involves knowledge, in addition to these, of the thermal regime (parts temperature, cooling fluid temperature, intake air temperature, exhaust temperature, altitude corrections and etc.). The logic diagram of the calculation program is presented. The calculation program for determining the indicator diagram is done in Mathcad, both for the low pressure area and for the high pressure. The engine stand and the pressure transducer with their characteristics are presented. The diagrams are shown in p-V and p-φ coordinates. The p-V indicator diagrams are calculated by the presented program based on data measured on the engine stand.. The indicator diagram was calculated in p-V coordinates, and in p-α coordinates. Equations for thermal processes that take place in the engine were determined and then entered into a computer program. Using these equations, the state parameters were calculated at the characteristic points of the engine cycle. The research was conducted in order to obtain information that could be used improving the characteristics of an engine SI.

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Section: Indikatorski Dijagrami U P-v Koordinatama Određeni Proračuno...unclassified

The Indicator Diagrams in P-v Coordinates Calculated and Measured on the Engine Stand

Blaga¹,

Blaga²

2022

MVM

View full text Add to dashboard Cite

show abstract

The calculus of the technical-economic parameters of a SI direct injection engine

Cited by 1 publication

References 0 publications

The Indicator Diagrams in P-v Coordinates Calculated and Measured on the Engine Stand

The Indicator Diagrams in P-v Coordinates Calculated and Measured on the Engine Stand

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