Simulation based study on improving the transient response quality of turbocharged diesel engines

Rakesh Mishra, Syed Saad

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Purpose: Use of fossil fuels in automotive sector is one of the primary causes of greenhouse emissions. The automotive engines need to perform at their best efficiency point to limit these emissions. Most of the quality indicators in this regard are based on near steady state global operational characteristics for engines without considering local performance. In the present study, extensive numerical simulations have been carried out covering a wide range of steady state and transient operating conditions to quantify interaction of turbocharger with engines through turbo-lag phenomena which may cause increased emissions during the load change conditions. Furthermore possible innovations have been explored to minimise turbo-lag phenomena.

Design Methodology/Approach :
In this paper quality indicators have been developed to quantify the performance of turbocharged diesel engine under the transient event of rapid change in fueling rate which have been rarely investigated. The rate of fueling is changed from 40 mm3/injection to 52 mm3/injection at 1000 rpm engine speed which corresponds to normal operating condition. To improve quality of transient response, torque assistance method and reduction of inertia of compressor wheel have been used. Parametric study has been undertaken to analyze the quality indicators such as outlet pressure of the compressor and the compressor speed. The turbo-lag is quantified to obtain the close to optimal transient response of turbocharged diesel engine.

Findings: It has been shown that, with torque assist the transient response of the internal combustion engine is significantly improved. On the other hand, marginal improvement in transient response is observed by the reduction in inertia of the compressor wheel.

Research limitations/ implications: The findings indicate that turbo-lag can be minimised by providing torque assistance by active and passive means.

Practical Implications: The developed methods can be used in practice for efficient operation of vehicles.

Social Implications: The work carried out provides a way to minimise harmful emissions.

Originality/Value: The quality indicators developed provide a quantitative measure of turbo-lag phenomena and address the above mentioned problems.
LanguageEnglish
Pages297-309
Number of pages13
JournalJournal of Quality in Maintenance Engineering
Volume23
Issue number3
DOIs
Publication statusPublished - 14 Aug 2017

Fingerprint

Transient analysis
Diesel engines
Compressors
Engines
Fueling
Torque
Wheels
Greenhouses
Internal combustion engines
Fossil fuels
Innovation
Diesel engine
Lag
Simulation
Response quality
Computer simulation
Quality indicators
Inertia
Injection

Cite this

@article{1498e6ec41c7403aba0d99bcf487f9f5,
title = "Simulation based study on improving the transient response quality of turbocharged diesel engines",
abstract = "Purpose: Use of fossil fuels in automotive sector is one of the primary causes of greenhouse emissions. The automotive engines need to perform at their best efficiency point to limit these emissions. Most of the quality indicators in this regard are based on near steady state global operational characteristics for engines without considering local performance. In the present study, extensive numerical simulations have been carried out covering a wide range of steady state and transient operating conditions to quantify interaction of turbocharger with engines through turbo-lag phenomena which may cause increased emissions during the load change conditions. Furthermore possible innovations have been explored to minimise turbo-lag phenomena.Design Methodology/Approach : In this paper quality indicators have been developed to quantify the performance of turbocharged diesel engine under the transient event of rapid change in fueling rate which have been rarely investigated. The rate of fueling is changed from 40 mm3/injection to 52 mm3/injection at 1000 rpm engine speed which corresponds to normal operating condition. To improve quality of transient response, torque assistance method and reduction of inertia of compressor wheel have been used. Parametric study has been undertaken to analyze the quality indicators such as outlet pressure of the compressor and the compressor speed. The turbo-lag is quantified to obtain the close to optimal transient response of turbocharged diesel engine.Findings: It has been shown that, with torque assist the transient response of the internal combustion engine is significantly improved. On the other hand, marginal improvement in transient response is observed by the reduction in inertia of the compressor wheel.Research limitations/ implications: The findings indicate that turbo-lag can be minimised by providing torque assistance by active and passive means.Practical Implications: The developed methods can be used in practice for efficient operation of vehicles.Social Implications: The work carried out provides a way to minimise harmful emissions.Originality/Value: The quality indicators developed provide a quantitative measure of turbo-lag phenomena and address the above mentioned problems.",
keywords = "turbocharger, Diesel engine, carbon emissions, turbo-lag",
author = "Rakesh Mishra and Syed Saad",
year = "2017",
month = "8",
day = "14",
doi = "10.1108/JQME-08-2016-0037",
language = "English",
volume = "23",
pages = "297--309",
journal = "Journal of Quality in Maintenance Engineering",
issn = "1355-2511",
publisher = "Emerald Group Publishing Ltd.",
number = "3",

}

Simulation based study on improving the transient response quality of turbocharged diesel engines. / Mishra, Rakesh; Saad, Syed.

In: Journal of Quality in Maintenance Engineering, Vol. 23, No. 3, 14.08.2017, p. 297-309.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Simulation based study on improving the transient response quality of turbocharged diesel engines

AU - Mishra, Rakesh

AU - Saad, Syed

PY - 2017/8/14

Y1 - 2017/8/14

N2 - Purpose: Use of fossil fuels in automotive sector is one of the primary causes of greenhouse emissions. The automotive engines need to perform at their best efficiency point to limit these emissions. Most of the quality indicators in this regard are based on near steady state global operational characteristics for engines without considering local performance. In the present study, extensive numerical simulations have been carried out covering a wide range of steady state and transient operating conditions to quantify interaction of turbocharger with engines through turbo-lag phenomena which may cause increased emissions during the load change conditions. Furthermore possible innovations have been explored to minimise turbo-lag phenomena.Design Methodology/Approach : In this paper quality indicators have been developed to quantify the performance of turbocharged diesel engine under the transient event of rapid change in fueling rate which have been rarely investigated. The rate of fueling is changed from 40 mm3/injection to 52 mm3/injection at 1000 rpm engine speed which corresponds to normal operating condition. To improve quality of transient response, torque assistance method and reduction of inertia of compressor wheel have been used. Parametric study has been undertaken to analyze the quality indicators such as outlet pressure of the compressor and the compressor speed. The turbo-lag is quantified to obtain the close to optimal transient response of turbocharged diesel engine.Findings: It has been shown that, with torque assist the transient response of the internal combustion engine is significantly improved. On the other hand, marginal improvement in transient response is observed by the reduction in inertia of the compressor wheel.Research limitations/ implications: The findings indicate that turbo-lag can be minimised by providing torque assistance by active and passive means.Practical Implications: The developed methods can be used in practice for efficient operation of vehicles.Social Implications: The work carried out provides a way to minimise harmful emissions.Originality/Value: The quality indicators developed provide a quantitative measure of turbo-lag phenomena and address the above mentioned problems.

AB - Purpose: Use of fossil fuels in automotive sector is one of the primary causes of greenhouse emissions. The automotive engines need to perform at their best efficiency point to limit these emissions. Most of the quality indicators in this regard are based on near steady state global operational characteristics for engines without considering local performance. In the present study, extensive numerical simulations have been carried out covering a wide range of steady state and transient operating conditions to quantify interaction of turbocharger with engines through turbo-lag phenomena which may cause increased emissions during the load change conditions. Furthermore possible innovations have been explored to minimise turbo-lag phenomena.Design Methodology/Approach : In this paper quality indicators have been developed to quantify the performance of turbocharged diesel engine under the transient event of rapid change in fueling rate which have been rarely investigated. The rate of fueling is changed from 40 mm3/injection to 52 mm3/injection at 1000 rpm engine speed which corresponds to normal operating condition. To improve quality of transient response, torque assistance method and reduction of inertia of compressor wheel have been used. Parametric study has been undertaken to analyze the quality indicators such as outlet pressure of the compressor and the compressor speed. The turbo-lag is quantified to obtain the close to optimal transient response of turbocharged diesel engine.Findings: It has been shown that, with torque assist the transient response of the internal combustion engine is significantly improved. On the other hand, marginal improvement in transient response is observed by the reduction in inertia of the compressor wheel.Research limitations/ implications: The findings indicate that turbo-lag can be minimised by providing torque assistance by active and passive means.Practical Implications: The developed methods can be used in practice for efficient operation of vehicles.Social Implications: The work carried out provides a way to minimise harmful emissions.Originality/Value: The quality indicators developed provide a quantitative measure of turbo-lag phenomena and address the above mentioned problems.

KW - turbocharger

KW - Diesel engine

KW - carbon emissions

KW - turbo-lag

UR - http://www.emeraldinsight.com/loi/jqme

U2 - 10.1108/JQME-08-2016-0037

DO - 10.1108/JQME-08-2016-0037

M3 - Article

VL - 23

SP - 297

EP - 309

JO - Journal of Quality in Maintenance Engineering

T2 - Journal of Quality in Maintenance Engineering

JF - Journal of Quality in Maintenance Engineering

SN - 1355-2511

IS - 3

ER -