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

• Published in: Energies (Basel) Vol. 13; no. 5; p. 1076
• Main Authors: Gutarevych, Yurii, Mateichyk, Vasyl, Matijošius, Jonas, Rimkus, Alfredas, Gritsuk, Igor, Syrota, Oleksander, Shuba, Yevheniy
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-03-2020
• Subjects: Automobile engines; Biodiesel fuels; combined method of power regulation; Energy efficiency; Engine cylinders; Fuel consumption; Fuel economy; Gasoline; Influence; Load; Regulations; Spark ignition; spark ignition engine; switching off the cylinder group; the idling mode; Throttles; Throttling; Vehicles
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en13051076

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.