Exhaust Temperature Management for Diesel Engines Assessment of Engine Concepts and Calibration Strategies with Regard to Fuel Penalty

Biodiesel is a promising renewable alternative fuel, which can be used in diesel‐electric hybrid vehicles to potentially bring one kind of clean vehicle on the road. However, the fuel property variation can cause impacts to the powertrain and aftertreatment systems. In this paper, biodiesel's influence on post‐injection effects is studied. Experimental results are obtained to demonstrate the differences between diesel and biodiesel, and to build up fuel‐dependent maps of engine torque, temperature, and emissions. Utilizing those maps, an aftertreatment warm‐up approach compatible with both fuels is developed by strategically enabling double post injections. Finally, a supervisory controller based on model predictive control method is designed to optimize and balance the tradeoff between hybrid vehicle fuel economy and tailpipe emissions. Simulations are conducted for both fuels with or without the proposed control strategy. The validation results show that for both fuels, the controller can significantly reduce tailpipe emissions by successfully regulating the catalyst temperature to the desired range sacrificing fuel economy. And for biodiesel, additional fuel cost is required in order to realize the tradeoff.

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“…A schematic diagram of a typical parallel diesel–electric hybrid vehicle coupled with aftertreatment system is given in Fig. .…”

Section: System Modelingmentioning

confidence: 99%

“…A schematic diagram of a typical parallel dieselelectric hybrid vehicle [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] coupled with aftertreatment system is given in Fig. 1.…”

Section: System Modelingmentioning

confidence: 99%

Comparative Study and Accommodation of Biodiesel in Diesel‐Electric Hybrid Vehicles Coupled with Aftertreatment Systems

Zhao

Chen

Ibrahim

et al. 2015

Asian Journal of Control

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“…In Ref. [17], Honardar et al examined the impact of exhaust valve timing phase on exhaust gas temperature improvement. A rise of around 40 o C exhaust gas temperature can be obtained when earlier exhaust valve phasing is applied to the system.…”

Section: Introductionmentioning

confidence: 99%

Effects of application of variable valve timing on the exhaust gas temperature improvement in a low-loaded diesel engine

Başaran

Özsoysal

2017

Applied Thermal Engineering

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“…Honardar et al [11] experimentally studied the effects of post injection, throttling, and variable valve timing on exhaust gas temperature, emissions, and fuel penalty for a with penalties of higher fuel consumption and emissions of HCs, CO, and NOx. They were able to increase exhaust temperature by advancing exhaust valve opening which gave an earlier blow-down; the resulting expansion reduced in-cylinder NOx production allowing lower external EGR for the fixed engine-out NOx level.…”

Section: Chapter 1: Introductionmentioning

confidence: 99%

Increasing Exhaust Temperature of an Idling Light-Duty Diesel Engine through Post-Injection and Intake Throttling

Ozel¹,

Hall²,

Matthews³

2018

SAE Technical Paper Series

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Exhaust Temperature Management for Diesel Engines Assessment of Engine Concepts and Calibration Strategies with Regard to Fuel Penalty

Cited by 38 publications

References 3 publications

Comparative Study and Accommodation of Biodiesel in Diesel‐Electric Hybrid Vehicles Coupled with Aftertreatment Systems

Comparative Study and Accommodation of Biodiesel in Diesel‐Electric Hybrid Vehicles Coupled with Aftertreatment Systems

Effects of application of variable valve timing on the exhaust gas temperature improvement in a low-loaded diesel engine

Increasing Exhaust Temperature of an Idling Light-Duty Diesel Engine through Post-Injection and Intake Throttling

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