Smart Cylinder Deactivation Strategies to Improve Fuel Economy and Pollutant Emissions for Diesel-Powered Applications

Scassa, Mauro; Körfer, Thomas; Chen, S Kevin; Fuerst, John A.; Younkins, Matthew; Nencioni, Marco; George, Shino

doi:10.4271/2019-24-0055

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…The studies carried out by the above authors deal with the issues of increasing the fuel efficiency of engines by fuel shutoff in the idling ICE cylinders. But the sources do not provide methods for the analytical calculation of the fuel efficiency of cars and tractors during transport operations when some of the engine cylinders are off [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Increase in the Fuel Efficiency of a Diesel Engine by Disconnecting Some of Its Cylinders

Gritsenko,

Shepelev,

Fedoseev

et al. 2023

FU Mech Eng

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In fuel economy, a rising level of interest in heavy duty diesel engines that industry has witnessed over the last few years continues to go up and this is not likely to change. Lowering the fuel consumption of all internal combustion engines remains a priority for years to come, driven by economic, legislative, and environmental reasons. According to statistics, the share of operating expenses to ensure transport operations in industrial production is 15-20%, wherein 16-30% of the total volume of transport operations concerns a car, tractor, and trailer. During transport operations, the engine load by the torque, in most cases, does not exceed 40-50%. The paper investigates the increase in fuel efficiency of cars and tractors by disconnecting some of the engine cylinders operated in low-load and idling modes. The research has led to the establishment of the theoretical dependencies between the effective power, engine efficiency, mass of the transported cargo, speed of the car (tractor) and the number of disconnected engine cylinders. Results of experiments suggest the interdependencies of the performance parameters of the car (tractor) when disconnecting some of the engine cylinders. It has also been established that the maximum reduction in the hourly fuel consumption occurs in the idling mode while it decreases along with an increase in the load.

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Section: Introductionmentioning

confidence: 99%

Increase in the Fuel Efficiency of a Diesel Engine by Disconnecting Some of Its Cylinders

Gritsenko,

Shepelev,

Fedoseev

et al. 2023

FU Mech Eng

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Fast Catalyst Light-Off with Dynamic Skip Fire

Luo¹,

Hashemi²,

Subramanian³

et al. 2020

SAE Int. J. Adv. & Curr. Prac. in Mobility

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<div class="section abstract"><div class="htmlview paragraph">Catalytic aftertreatment is commonly used to reduce regulated gas emissions from Internal Combustion (IC) engines. Achieving fast catalyst light-off has always been a challenge for automobile IC engine applications. This paper experimentally studied the thermal management and regulated gas emissions from a Spark Ignition (SI) engine with Dynamic Skip Fire (DSF®) technology during cold start period.</div><div class="htmlview paragraph">The study has found that DSF can increase exhaust gas temperature at the catalyst inlet by up to 100°C, and the exhaust enthalpy by up to 20%. Cold start tailpipe carbon monoxide (CO) and hydrocarbon (HC) emissions can be reduced by 10% to 20% largely due to the increased exhaust gas temperature and enthalpy. Dynamic air pumping can further increase exhaust gas temperature by 30 °C, and can nearly double enthalpy delivered to the catalyst, which reduces cold start HC emissions by more than 50%.</div></div>

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