Increased Burning Rates Offer Improved Fuel Economy-NOx Emissions Trade-Offs in Spark-Ignition Engines

1979 ◽  
Author(s):  
James H. Tuttle ◽  
Richard R. Toepel
Keyword(s):  
Fuel Economy ◽  
Spark Ignition ◽  
Nox Emissions ◽  
Spark Ignition Engines ◽  
Trade Offs ◽  
Burning Rates

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

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.

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