scholarly journals The Effects of Cylinder Deactivation on the Thermal Behaviour and Performance of a Three Cylinder Spark Ignition Engine

2016 ◽  
Vol 9 (4) ◽  
pp. 1999-2009 ◽  
Author(s):  
Alexander Bech ◽  
Paul J. Shayler ◽  
Michael McGhee
Keyword(s):  
Thermal Behaviour ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Cylinder Deactivation ◽  
And Performance

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.

Overview of the oxygenated fuels in spark ignition engine: Environmental and performance

2018 ◽  
Vol 91 ◽  
pp. 394-408 ◽  
Author(s):  
Omar I. Awad ◽  
R. Mamat ◽  
Thamir K. Ibrahim ◽  
Ali Thaeer Hammid ◽  
I.M. Yusri ◽  
...  
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engine ◽  
And Performance ◽  
Oxygenated Fuels

Knock Limits and Performance of Some Gaseous Fuels in a Supercharged Spark-Ignition Engine

1970 ◽  
Vol 185 (1) ◽  
pp. 857-867 ◽  
Author(s):  
W. J. D. Annand ◽  
S. J. Sulaiman
Keyword(s):  
Ignition Time ◽  
Full Range ◽  
Spark Ignition ◽  
Critical Value ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Gaseous Fuels ◽  
And Performance ◽  
Simple Parameter ◽  
Propane Butane

Observations of knock limits, in terms of ignition time for borderline knock, are presented for methane and propane at a range of supercharge conditions up to 9 ***lbf/in2boost, in a spark-ignition engine of 105 mm bore running at speeds of 600 and 920 rev/min, with compression ratios of 7·7/1 and 9·5/1. Associated measurements of output and economy are given. Less extensive observations on a butane fuel, and on methane-propane and propane-butane mixtures, are also included. From an examination of computed temperature-pressure histories in the unburned portion of the mixture, it is found that the knock limited ignition advance on the propane fuel at chemically-correct mixture can be closely predicted over the full range of operating conditions covered, by the attainment of a certain critical value of a simple parameter.

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