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IMPROVING FUEL EFFICIENCY GASOLINE ENGINE IN IDLING

Journal: Academic Journal "Industrial Machine Building, Civil Engineering" (Vol.3, No. 45)

Publication Date:

Authors : ;

Page : 47-56

Keywords : active idle; gasoline engine; hydrogen containing gas; intensification; fuel efficiency.;

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Abstract

In the engine with spark ignition at low loads and modes idling significantly worsen their fuel efficiency and environmental performance. The increase in specific fuel consumption by the engine is idling, small loads and transients mainly determined by mixing deterioration, increasing the relative heat losses in the coolant and oil temperature is reduced in these modes. Also, when the engine load modes small fortune increased relative cost net power to overcome mechanical resistance, and the work is idling all the power of the engine is consumed to overcome friction, gas exchange and to drive auxiliary machinery. All these factors lead to the fact that the specific fuel consumption of the engine at low loads and modes of idling 1,5 – 5 times higher than the rated power at work that affect the value of environmental performance. One of the measures to improve workflow and reduce fuel consumption engines with spark ignition modes of small loadings and idling is the use of additives that intensify the combustion process. Most their physical and chemical properties suitable for these purposes hydrogen as its rate of combustion significantly exceeds the rate of combustion of gasoline. But the use of pure hydrogen is complicated by the fact that its storage on board the vehicle represents a significant hazard. In this regard, are useful as additives substances containing hydrogen in its composition and that you can get on board the vehicle. These substances belong hydrogen containing gas H2/O2, which is produced by electrolysis of aqueous solutions of alkali. This gas consists of molecules and atoms of hydrogen and oxygen. The article describes the results of experimental studies of the impact additives hydrogen containing gas to fuel efficiency gasoline engine in various modes active speed idling. In laboratory testing engines department «Engines and Heating Engineering» National Transport University studied the impact of additives hydrogen containing gas to fuel efficiency gasoline engine with carburetor feed system MeMZ-245 in the active idle. Tests conducted on the engine rotation frequency in the range from 900 to 3,000 rpm. Size additives was constant for all speeds and amounted to 1б5 l / min. Additive the hydrogen containing gas has positive effect on fuel efficiency gasoline engine idling. By working with constant addition of 1.5 l / min H2/O2 hour reduced consumption of gasoline at different speed idling. The biggest savings for the 11.86% observed with a frequency of 900 rpm and the addition of 8.3% hydrogen containing gas. To achieve a certain speed mode for work with the addition of H2/O2 must throttle opening angle to less than without gas. As a result of reduced hour air flow, resulting in a massive reduction of harmful emissions.

Last modified: 2016-07-25 19:44:01