Turbocharging Small Displacement Spark Ignition Engines for Improved Fuel Economy

1979 ◽  
Author(s):  
K. -D. Emmenthal ◽  
G. Hagemann ◽  
W. -H. Hucho
Keyword(s):  
Fuel Economy ◽  
Spark Ignition ◽  
Small Displacement ◽  
Spark Ignition Engines

scholarly journals Improving Fuel Economy of Spark Ignition Engines Applying the Combined Method of Power Regulation

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1076 ◽  
Author(s):  
Yurii Gutarevych ◽  
Vasyl Mateichyk ◽  
Jonas Matijošius ◽  
Alfredas Rimkus ◽  
Igor Gritsuk ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Spark Ignition ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Spark Ignition Engines ◽  
Combined Method ◽  
Research Results ◽  
Fuel Supply ◽  
Power Regulation ◽  
Engine Power

One of the disadvantages of spark ignition engines, whose power is regulated by throttling, is the increased fuel consumption at low loads and when the engine is idle. The combined method of engine power regulation by switching off the cylinder group and throttling working cylinders is one of the effective ways to improve fuel economy in the above-mentioned modes. This article presents the research results of the combined method of engine power regulation which can be realized by minor structural changes in operating conditions. The method implies the following: at low loads and at idle speed of the engine. Fuel supply to the group of cylinders is switched off with the simultaneous increase of the cyclic fuel supply in the working cylinders. The adequacy of the calculated results has been checked by the indication of operating processes in switched off and working cylinders. The research results of a six-cylinder spark ignition engine with the distributed gasoline injection using the combined power regulation system have been shown. The angles of opening the throttle which provides a non-shock transition from the operation with all cylinders to the operation with the cylinder group switched off have been determined.

A novel robust control system to reduce the exhaust emission and enhance the fuel economy for spark ignition engines

2012 ◽  
pp. EEP96
Author(s):  
Reza Tafreshi ◽  
Behrouz Ebrahimi ◽  
Javad Mohammadpour ◽  
matthew Franchek ◽  
Karolos Grigoriadis ◽  
...  
Keyword(s):  
Control System ◽  
Robust Control ◽  
Fuel Economy ◽  
Spark Ignition ◽  
Exhaust Emission ◽  
Spark Ignition Engines ◽  
Robust Control System

High Fuel Economy Enabled by the Split Engine

2005 ◽  
Author(s):  
Marc Ross ◽  
Alberto J. Lo´pez ◽  
Frank H. Walker
Keyword(s):  
Fuel Economy ◽  
Internal Combustion Engines ◽  
Relative Phase ◽  
Spark Ignition ◽  
Small Displacement ◽  
Combustion Engines ◽  
Cylinder Deactivation ◽  
Light Duty ◽  
Light Trucks ◽  
Light Duty Vehicles

Half the engine displacement of popular cars and light trucks would be adequate for most driving. The split engine (SE) is introduced here as a concept to improve the fuel economy of light-duty vehicles with large spark-ignition internal combustion engines. It operates with a small-displacement portion of the engine for typical driving and activates the secondary portion of the engine to assist with high-power driving. SE is different from cylinder deactivation; the two portions of the engine have independent crankshafts which connect through a one-way clutch, a mechanical diode with indexing features to achieve the correct relative phase of the engine sections. For illustration, 6- and 8-cylinder SE are proposed and simple versions are modeled analytically. The 6-cylinder SE consists of two inline 3-cylinder engines of equal or near-equal displacement. The 8-cylinder SE consists of two opposed horizontal 4-cylinder engines of the same displacement. SE and cylinder deactivation are also compared. Moments of inertia and the time to connect both engine sections smoothly are estimated. Fuel economy improvements with SE are estimated for the EPA urban and highway cycles.

scholarly journals WAYS TO IMPROVE OF THE COMBINED METHOD POWER REGULATION OF A SPARK

2021 ◽  
Vol 1 (50) ◽  
pp. 180-187
Author(s):  
Rychok S ◽  
Keyword(s):  
Power Control ◽  
Fuel Economy ◽  
Control Method ◽  
Fuel Efficiency ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Spark Ignition Engines ◽  
Combined Method ◽  
Exhaust Gases ◽  
Low Efficiency

The article considers the problem of spark ignition engines low efficiency in low-load and idling modes, as well as one of the ways to solve it by improving the combined method of power control. The object of research is the influence of the power control method of spark ignition engine on fuel efficiency. The purpose of research is to improve the combined method of power control of a spark ignition engine. As a result of familiarization with the previous works which were conducted in this direction, it is established that by deactivating a group of cylinder when engine is idling or at low loads a fuel economy is improving. However, previous works has not considered a possibility of performance improving of engine with electronic control system by filling the deactivated cylinders with exhaust gases of working cylinders, heated air, or a mixture of exhaust gases and air. KEY WORDS: CYLINDER DISCONNECTION, FUEL ECONOMY, POWER ADJUSTMENT.

A Phenomenological Model for ‘Barrel’ Swirl in Reciprocating Engines

1992 ◽  
Vol 206 (1) ◽  
pp. 63-71 ◽  
Author(s):  
S F Benjamin
Keyword(s):  
Combustion Chamber ◽  
Fuel Economy ◽  
Phenomenological Model ◽  
Spark Ignition ◽  
Wall Friction ◽  
Shear Stresses ◽  
Spark Ignition Engines ◽  
Fluid Shear ◽  
High Fluid ◽  
Experimental Findings

Recent studies have shown that a ‘barrel’ swirl type of flow in spark ignition engines may be exploited to provide improved fuel economy and reduced emissions. A simple analytical phenomenological model of ‘barrel’ swirl has been developed for a disc-type combustion chamber that describes the vortex behaviour during compression. The model shows that the vortex can spin up during early compression but then rapidly decays as top dead centre is approached due to the high fluid shear stresses that develop. This mechanism of swirl arrestment is shown to dominate that due to wall friction. The model confirms experimental findings that show rapid swirl decay in certain four-valve engines.

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