Synergies of Cooled External EGR, Water Injection, Miller Valve Events and Cylinder Deactivation for the Improvement of Fuel Economy on a Turbocharged-GDI Engine; Part 1, Engine Simulation

2019 ◽  
Author(s):  
Myungsik Choi ◽  
Young-Hong Kwak ◽  
Jerry Song ◽  
Varun Negandhi ◽  
Daniel Gajowski
Keyword(s):  
Fuel Economy ◽  
Water Injection ◽  
Cylinder Deactivation ◽  
Engine Simulation ◽  
Engine Part ◽  
Gdi Engine

The effects of cylinder deactivation on the thermal behaviour and fuel economy of a three-cylinder direct injection spark ignition gasoline engine

2018 ◽  
Vol 233 (11) ◽  
pp. 2838-2849
Author(s):  
Michael McGhee ◽  
Ziman Wang ◽  
Alexander Bech ◽  
Paul J Shayler ◽  
Dennis Witt
Keyword(s):  
Fuel Economy ◽  
Gasoline Engine ◽  
Thermal State ◽  
Direct Injection ◽  
Spark Ignition ◽  
Combustion Efficiency ◽  
Spark Ignition Engine ◽  
Engine Fuel ◽  
Cylinder Deactivation ◽  
Direct Injection Spark Ignition

The changes in thermal state, emissions and fuel economy of a 1.0-L, three-cylinder direct injection spark ignition engine when a cylinder is deactivated have been explored experimentally. Cylinder deactivation improved engine fuel economy by up to 15% at light engine loads by reducing pumping work, raising indicated thermal efficiency and raising combustion efficiency. Penalties included an increase in NOx emissions and small increases in rubbing friction and gas work losses of the deactivated cylinder. The cyclic pressure variation in the deactivated cylinder falls rapidly after deactivation through blow-by and heat transfer losses. After around seven cycles, the motoring loss is ~2 J/cycle. Engine structural temperatures settle within an 8- to 13-s interval after a switch between two- and three-cylinder operation. Engine heat rejection to coolant is reduced by ~13% by deactivating a cylinder, extending coolant warm-up time to thermostat-opening by 102 s.

Experimental study of the effect of gasoline components on fuel economy, combustion and emissions in GDI engine

Fuel ◽  
2018 ◽  
Vol 216 ◽  
pp. 371-380 ◽  
Author(s):  
Yongqiang Han ◽  
Shicheng Hu ◽  
Manzhi Tan ◽  
Yun Xu ◽  
Jing Tian ◽  
...  
Keyword(s):  
Experimental Study ◽  
Fuel Economy ◽  
Gdi Engine

Effect of a Cylinder Deactivation Actuator with Electro-Mechanical Switching System on Fuel Economy of an Automotive Engine

2020 ◽  
Author(s):  
Dong Hyeong Lee ◽  
Dojoong Kim ◽  
Wan Jae Jeon ◽  
Yong Seok Hong ◽  
Jong Wung Park
Keyword(s):  
Fuel Economy ◽  
Switching System ◽  
Cylinder Deactivation ◽  
Automotive Engine
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