Effects of Injection Timing on Transient Performance of A Regulated Two-Stage Turbocharged Diesel Engine with Turbine Bypass Valve

Liu, Zhong Chang; Yuan, Xing; Tian, Jing; Han, Yong Qiang; Yu, Kai; Teng, Peng Kun

doi:10.1007/s12239-018-0075-3

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…Due to the higher air temperature, which is retained in the cylinders at the end of the intake process, there is also an increase in the thermal regime (maximum temperature per cylinder) and the thermal stresses of the pistons, valves, and vanes of the tubing rotor [23,24]. The reduction of the thermal regime can be obtained by cooling the forced air from the compressor (intercooler), changing the distribution phases (increasing the crossing angle of the valve opening), and increasing the air flow on the cycle [25,26].…”

Section: Turbocharging Principlesmentioning

confidence: 99%

Advanced Engine Technologies for Turbochargers Solutions

et al. 2021

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Research in the process of internal combustion engines shows that their efficiency can be increased through several technical and functional solutions. One of these is turbocharging. For certain engine operating modes, the available energy of the turbine can also be used to drive an electricity generator. The purpose of this paper is to highlight the possibilities and limitations of this solution. For this purpose, several investigations were carried out in the virtual environment with the AMESim program, as well as experimental research on a diesel engine for automobiles and on a stand for testing turbochargers (Turbo Test Pro produced by CIMAT). The article also includes a comparative study between the power and torque of the naturally aspirated internal combustion engine and equipped with a hybrid turbocharger. The results showed that the turbocharger has a very high operating potential and can be coupled with a generator without decreasing the efficiency of the turbocharger or the internal combustion engine. The main result was the generation of electrical power of 115 W at a turbocharger shaft speed of 140,000–160,000 rpm with an electric generator shaft speed of 14,000–16,000 rpm. There are many constructive solutions for electrical turbochargers with the generator positioned between the compressor and the turbine wheel. This paper is presenting a solution of a hybrid turbocharger with the generator positioned and coupled with the compressor wheel on the exterior side.

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Section: Turbocharging Principlesmentioning

confidence: 99%

Advanced Engine Technologies for Turbochargers Solutions

et al. 2021

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Investigation on steam direct injection in a natural gas engine for fuel savings

Zhang

2019

Energy

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Detailed Evaluation of Automotive Turbocharged Diesel Engine During Typical Transient Working Condition Based on Thermodynamic Analysis

Liu

Tian

et al. 2021

Journal of Engineering for Gas Turbines and Power

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In this study, the impacts of transient time, intake air temperature, coolant temperature and piecewise transient strategies on energy and exergy terms during typical transient process of automotive diesel engine were researched based on experiment and numerical means. The results show that firstly, distortion of energy and exergy are relatively significant during shorter transient time. Fuel incomplete combustion is the root of energy and exergy distortion during transient process. Secondly, low intake air temperature is helpful to restrain work distortion and enhance efficiency during transient process, comprehensive effects of local ER (equivalence ratio) and local in-cylinder temperature makes IED (in-cylinder exergy destruction) little change at different intake air temperature. Third, enhancing the heat insulation characteristics of heat transfer boundary during transient process can effectively improve efficiency, while weaken the distortion degree of work. Tiny differences of local ER and local in-cylinder temperature at different coolant temperature result in the little change of IED during transient process. Fourth, the influences of different piecewise transient elements on efficiency are from strong to weak: first stage transient time > stagnation time > second stage transient time. Longer first stage transient time and stagnation time are helpful to reduce energy, exergy distortion degree. Finally, there are some similarity on IED production mechanism between transient and steady state process, moreover, the adjustment routes of boundary parameters to realize high efficiency during transient process: longer transient time coupling stagnation time, lower intake air temperature and higher coolant temperature.

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Effects of Injection Timing on Transient Performance of A Regulated Two-Stage Turbocharged Diesel Engine with Turbine Bypass Valve

Cited by 3 publications

References 25 publications

Advanced Engine Technologies for Turbochargers Solutions

Advanced Engine Technologies for Turbochargers Solutions

Investigation on steam direct injection in a natural gas engine for fuel savings

Detailed Evaluation of Automotive Turbocharged Diesel Engine During Typical Transient Working Condition Based on Thermodynamic Analysis

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