Drawing Engine Universal Performance Characteristics Map Method Based on MATLAB

2012 ◽  
Vol 614-615 ◽  
pp. 361-365 ◽  
Author(s):  
Zhi Peng Zhang ◽  
Jian Zhen Zhang
Keyword(s):  
Fuel Economy ◽  
Performance Characteristics ◽  
Efficient Tool ◽  
Operational Range ◽  
Changing Tendency

The changing tendency of engine performances in its operational range can be directly showed in the engine universal performance characteristics map. Taking advantage of MATLAB mathematic operation, data from engine characteristic tests are processed and the method is simple and credible. The universal performance characteristics map is intuitionist and perspicuous, and is in good fit with data got in tests. It provides a reliable and efficient tool to research into engine performances and automotive drive and fuel economy benefits.

scholarly journals PERFORMANCE EVALUATION OF A FOUR STROKE COMPRESSION IGNITION ENGINE WITH VARIOUS HELICAL THREADED INTAKE MANIFOLDS

2012 ◽  
pp. 277-285
Author(s):  
V.CVS PHANEENDRA ◽  
V. PANDURANGADU ◽  
M. CHANDRAMOULI
Keyword(s):  
Performance Evaluation ◽  
Fuel Economy ◽  
Performance Test ◽  
Prime Factor ◽  
Performance Characteristics ◽  
Compression Ignition ◽  
Improve Performance ◽  
Compression Ignition Engine ◽  
Inlet Manifold ◽  
Engine Systems

Fuel economy remains the prime factor favoring the application of the diesel engines and the need to improve performance regarding power output or lower fuel consumption or preferably both, has led to research in the engine systems. This research includes design and orientation of the inlet manifold, which is a major factor effecting the performance of the engine.A four stroke air cooled compression ignition engine with power 9 H.P and rated speed 1500 rpm was selected to investigate the performance characteristics. The swirl motion of the air is an important parameter in optimizing the performance of an engine. For better turbulence the surface of the inlet manifolds (C.I Engine) will be made rough and unpolished. Here, for obtaining better turbulence the helical threads were arranged in the inlet manifolds. The performance test was performed on the engine with the normal manifold and helical threaded manifolds of pitch 10mm, 15mm, 20mm, and 25mm. The performance characteristics with normal manifold and helical threaded manifolds were calculated and compared.

Reducing Nacelle Pressure Drag

2017 ◽  
Author(s):  
D. J. Cerantola ◽  
M. S. Zawislak ◽  
A. M. Birk
Keyword(s):  
Reynolds Number ◽  
Fuel Economy ◽  
Suction Side ◽  
Maximum Diameter ◽  
Radius Of Curvature ◽  
Wall Functions ◽  
Pressure Drag ◽  
Baseline Case ◽  
Operational Range ◽  
Corner Vortex

Decreasing drag on aircraft components was beneficial towards improving fuel economy and operational range. A generic axisymmetric nacelle-strut configuration typical of those housing fuselage-mounted engines was evaluated at a Reynolds number of 6 × 105 based on the nacelle maximum diameter d = 26.5 cm and an angle of attack of 20 deg. It was estimated that drag could be reduced by 20%. Three case studies were evaluated that added a fillet to the nacelle-strut corner, vortex generating triangular tabs, and flow-path obstructing vanes to improve flow control by reducing suction-side separation. Experimental results showed that a 0.11 d radius of curvature fillet reduced drag by 8% with respect to the baseline case. Numerical results employing the realizable k-ε turbulence model with wall functions predicted no improvements with the tabs and an 8% reduction with the vanes.

Hybridization of Medium-Duty Tactical Truck Using Crankshaft-Integrated-Starter-Generator (C-ISG)

2012 ◽  
Author(s):  
Y. Gene Liao ◽  
Molly O’Malley ◽  
Allen M. Quail
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Experimental Evaluation ◽  
Performance Characteristics ◽  
Time Duration ◽  
Battery Charging ◽  
Static Tests ◽  
Fuel Economy Improvement ◽  
Starter Generator ◽  
The U.S

Fuel economy improvement on medium-duty tactical truck has and continues to be a significant initiative for the U.S. Army. The Crankshaft-Integrated-Starter-Generator (C-ISG) is one of the full hybrid propulsions to improve the fuel economy. The C-ISG configuration is attractive because one electric machine can be used to propel the vehicle, to start the engine, and to be function as a generator. The C-ISG has been implemented in one M1083A1 5-ton tactical cargo truck. This paper presents the experimental evaluation of the C-ISG hybrid truck performance characteristics compared to the conventional truck. The evaluated performance characteristics include all electric range for on- and off-road mission cycles, fuel consumption, as well as the battery charging profile and the silent watch time duration in the static tests.

scholarly journals Basic aspects of methodology for justifying the performance characteristics of a tracked machine with electromechanical transmission

2020 ◽  
Vol 17 (5) ◽  
pp. 574-583
Author(s):  
V. N. Kuznetsova ◽  
R. V. Romanenko
Keyword(s):  
Fuel Economy ◽  
System Analysis ◽  
Combustion Engine ◽  
Dynamic Properties ◽  
Road Transport ◽  
Performance Characteristics ◽  
Storage Device ◽  
Tracked Vehicle ◽  
Tracked Vehicles ◽  
Advantages And Disadvantages

Introduction. High rates of new territories development, the development of the construction and road-transport complex, mining and transportation of minerals is impossible without machinery and equipment. The use of a caterpillar propeller as a base chassis has both advantages and disadvantages. One of the main problems is ensuring the mobility of tracked vehicles. The use of mixed-type power units and transmissions allows solving this scientific problem and ensuring the efficiency of technological operations during the operation of tracked vehicles. Modern vehicles use a variety of transmission types, including electromechanical transmission (EMT). In such a design, torque conversion and change in the speed of the drive wheels of the caterpillar propulsion device are carried out by means of traction electric motors (TEM). The aim of the use of electromechanical transmission in tracked machines is to increase the tractive-dynamic properties and fuel economy and, as a result, to improve the mobility of the machine. The combination of an internal combustion engine (ICE) and electric machines in a caterpillar machine (CM) makes it possible to maximize the advantages of the latter and compensate for the disadvantages of each. These improvements are achieved mainly through the different performance characteristics of the traction electric engine (TEE) and the energy storage device (ESD).Research methods. A system analysis served as the basis for the theoretical studies. A mathematical model of the motion of a tracked vehicle with an electromechanical transmission has been developed. The methods of the theory of algorithms were used.Results. A structural diagram of the arrangement of a series connection of elements of an electromechanical transmission of a tracked vehicle, protected by a patent of the Russian Federation, has been developed and presented. An algorithm has been developed for the interaction of its elements taking into account the movement of the machine. The main mathematical relationships included in the methodology for substantiating the operational characteristics of a tracked vehicle with an electromechanical transmission are presented.Discussion and conclusion. Using the developed approaches and methodology, it will be possible to calculate the components of the electromechanical transmission in order to ensure the required mobility of the caterpillar machine, to assess its fuel economy, as well as its maximum and average speed.

Microstructure of an extruded rapidly solidified Al-8Fe-2Mo alloy

1986 ◽  
Vol 44 ◽  
pp. 548-549
Author(s):  
W. T. Donlon ◽  
J. E. Allison ◽  
S. Shinozaki
Keyword(s):  
Electron Microscopy ◽  
Automotive Industry ◽  
Fuel Economy ◽  
High Strength ◽  
Al Alloys ◽  
Light Weight ◽  
Thin Sections ◽  
Strength And Durability ◽  
Rapidly Solidified ◽  
Whitney Aircraft

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.

The Relation of Locomotive Maintenance to Fuel Economy

1918 ◽  
Vol 86 (2218supp) ◽  
pp. 11-11
Author(s):  
Frank McManamy
Keyword(s):  
Fuel Economy

Fuel Economy

1918 ◽  
Vol 86 (2225supp) ◽  
pp. 123-123
Keyword(s):  
Fuel Economy
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