An evaluation method for transient response performance of turbocharged diesel engines

Liu, Shuo; Cui, Yi; Wang, Yi; Deng, Kangyao; Liu, Sheng

doi:10.1016/j.energy.2019.06.080

Cited by 13 publications

(3 citation statements)

References 8 publications

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“…[12][13][14][15][16] The transient response of a turbocharger is a key factor affecting the transient performance of the diesel engine. 17,18 Turbocharger matching is usually aimed at meeting steady-state demands and obtaining low steady-state fuel consumption, so the maximum engine torque output determines the size of the turbocharger. A large turbocharger is typically selected, and the large turbine rotational inertia results in an engine intake that does not synchronize with the required value for the corresponding fuel supply during rapid acceleration conditions or load surges.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the transient-state performance of diesel engines at different speeds using the synergistic regulation of VGT and VVT

Dai,

Li,

Liang

et al. 2023

International Journal of Engine Research

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Heavy-duty diesel engines, the heat engines with the highest thermal efficiency, usually operate under transient conditions. Thus, it is important to study the transient performance of heavy-duty diesel engines. This paper aims to solve the problems of combustion deterioration, poor response, and emission deterioration caused by the mismatch between the air intake response and the fuel system under the strong transient condition of sudden loading of 1 s under constant speed. In this paper, an experimental study on the transient performance at different speeds under the coordinated regulation of a variable geometry turbocharger (VGT) and variable valve timing (VVT) is conducted. The study found that the transient torque response is affected by combustion in the cylinder and pump work. During the low-speed transient process, due to reduced airflow and pumping losses, the VVT is switched off while the VGT delay is increased to improve air response. Consequently, the mixture in the cylinder is fully burned, and improved transient performance is obtained. In the high-speed transient process, the engine air intake flow is improved. Through the VVT is ON at the appropriate time and the VGT hysteresis control, the pumping loss can be effectively reduced, and excellent transient performance can be achieved to ensure the fast response of the in-cylinder charge. Given sudden loading from 10% to 100% within 1 s under a high speed of 1600 r/min, the VVT switches on with a 0.15 s delay, and the VGT is controlled with a 0.4 s delay. A torque response of 0.82 s can be achieved, and the soot peak value is reduced by 66.26%, and the accumulated value of soot is reduced by 46.91%. At a low speed of 1000 r/min, given sudden loading from 10% to 100% within 1 s, the 0.6 s VGT delay can reduce the accumulated value of soot by 78.57% and 56.22% compared with delays of 0.2 and 0.4 s.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the transient-state performance of diesel engines at different speeds using the synergistic regulation of VGT and VVT

Dai,

Li,

Liang

et al. 2023

International Journal of Engine Research

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show abstract

“…Different techniques used in turbocharging processes of diesel engines, in order to improve the engine efficiency and exhaust emissions, have been considered in paper [3]. In study [4] an evaluation method for the transient response performance of turbocharged diesel internal combustion engines has been proposed and analysed. Investigation [5] presents a method for evaluation of the adaptability to different altitudes of turbocharging diesel engine systems.…”

Section: Introductionmentioning

confidence: 99%

Electronic system for control of temperature of exhaust gases and pressure in turbochargers of diesel automobile engines

2021

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The paper presents design and experimental investigation of an electronic system for control of the temperature of exhaust gases and the turbocharging air pressure in turbochargers of diesel automobile engines. The existing problems are faults in the fuel system of an engine. The indicators are changes in the values of the temperature and pressure in exact areas of the turbocharger. The presented device is a controller that monitors precisely the temperature and pressure, which are so vital for the long operation of the automobile. The control system is based on Arduino microcontroller. OLED Display has been added to visualize the obtained results. A schematic diagram of an electronic module for control of the temperature of exhaust gases and turbocharging air pressure in turbochargers of diesel automobile engines has been synthesized. The system has been investigated in laboratory conditions and practically implemented in a real automobile. As a result of laboratory experimental investigation, results were obtained for the time-monitored parameters temperature of the exhaust gases and turbocharging air pressure in the turbocharger system of a diesel automobile engine.

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“…The waste heat utilization technologies have drawn much attention in recently years. The waste heat of ICE has relatively high temperature, and can be used in many fields, such as generating power, heating, exhaust gas turbocharge, and refrigeration . Among these waste heat utilization technologies of ICE, heating and exhaust turbocharging are relative proven technique, and widely used in various vehicles.…”

Section: Introductionmentioning

confidence: 99%

Dynamic simulation and experimental verification on absorption refrigeration driven by vehicle waste heat

Liu

Han

et al. 2020

Int J Energy Res

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Waste heat exhausted from vehicle engine has significant influences on the performances of absorption refrigeration driven by vehicle exhaust heat (VARS), especially for the transient response of VARS to the exhaust temperature and flow rate. Moreover, ambient temperature and flow rate of solution pump also affect its performances. Based on these, a dynamic mathematical model of VARS was proposed and established to observe its dynamic performances in this work. Further, the dynamic model was solved, and the simulation results were compared to the experimental data of a prototype in the same operating conditions. Finally, the transient response of VARS to exhaust temperature and flow rate, ambient temperature, and flow rate of solution pump were analyzed. The simulation results showed that the response time is about 2000 seconds when a disturbance was imposed. The research findings can supply some guidance for a reliable design, optimization, and control strategy for the actual application of the VARS. K E Y W O R D Sbubble absorber, dynamic simulation, spiral coil generator, vehicle driven absorption refrigeration

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An evaluation method for transient response performance of turbocharged diesel engines

Cited by 13 publications

References 8 publications

Experimental study on the transient-state performance of diesel engines at different speeds using the synergistic regulation of VGT and VVT

Experimental study on the transient-state performance of diesel engines at different speeds using the synergistic regulation of VGT and VVT

Electronic system for control of temperature of exhaust gases and pressure in turbochargers of diesel automobile engines

Dynamic simulation and experimental verification on absorption refrigeration driven by vehicle waste heat

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