Tēma: Moto degvielas patēriņš

Kopš: 21. May 2009

No: Aknīste

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Braucu ar: Valkyrie Interstate

14 Feb 2013, 19:10:28 Niere rakstīja:

14 Feb 2013, 17:27:50 Valkyrie rakstīja:
Degvielas patēriņš ir atkarīgs arī no tā, kur atrodas STATOIL's, jo ir baigā nianse vai tā DUS ir Trondheimā, Bergenā vai Oslo. Nu vai arī piem. Preiļos

kļūdies.
pat tad, kad statoil ilgstoši piegādā degvielu no Mongstadas rūpnīcas, sūdzības par degvielas patēriņu neiet mazumā ne par procentu.
un no šīs rūpnīcas tiek piegādāts ļoti daudz.

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15 Feb 2013, 01:41:15 MIGs rakstīja:
Niere - vai visiem benzīniem iekš LV jābūt ar bioetanola piejaukumu, vai tā ir brīva izvēle ?

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09 Jan 2013, 11:08:59 Niere rakstīja:
Tā kā citā diskursā "Moto degvielas patēriņš" parādās tik populārais mīts par "dramatisko degvielas kvalitātes un patēriņa atšķirību" LV un "Eiropā", pārpublicēju informāciju no Chevron:
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FUEL ECONOMY

Fuel economy in the U.S. is usually expressed as the number of miles traveled on one gallon of gasoline (miles per gallon, or mpg). Many drivers calculate vehicle mpg by counting the miles driven between fill-ups. Outside the U.S., fuel economy is usually expressed as liters per 100 kilometers (L/100 km).
Because controlling influencing factors is difficult and often impossible, driving on the road is not a reliable way to determine how fuel economy is affected by gasoline composition. A more accurate determination is possible under controlled laboratory conditions. A vehicle is mounted on a chassis dynamometer in a temperature-controlled space and driven through a specified operating cycle.
The weight or volume of the gasoline consumed during the cycle may be measured or the fuel economy may be calculated from the weight fraction of carbon compounds in the vehicle’s exhaust.
Figure 1.3 shows that the average fuel economies of two fleets of vehicles are proportional to the heating values of the gasolines tested.4 This is the relationship predicted by combustion theory. In the test, the newer fleet was composed of 1989 model-year cars and the older fleet included 1984–1985 model-year cars. The test involved two different sets of gasolines(Matrix A and Matrix B) that varied in aromatics content, olefins content, oxygen content, oxygenate type, and several other properties (see page 31). Results show that heating values can be used as surrogates for actual fuel economy measurements when considering the effect of gasoline composition on fuel economy.
Conventional fuels always have varied in heating value. One cause is the formulation differences among batches and among refiners. A survey of 1990–1991 conventional gasolines found that the heating value of summer gasolines varied over an 8 percent range.5 Heating value also varies by grade and by season. On average, the heating value of premium-grade gasoline is about 0.7 percent higher than regular grade because premium grade, in general, contains more aromatic hydrocarbons, the class of hydrocarbons with the highest densities. The heating value of winter gasoline is about 1.5 percent lower than summer gasoline because winter gasoline contains more volatile, less dense hydrocarbons. Oxygenated gasolines (see page 53) have lower heating values because the heating values of the oxygenate components are lower than those of the hydrocarbons they displace. The percentage decrease in heating value is close to the mass percent oxygen in the gasoline. For example, in keeping with federal regulations, gasoline in carbon monoxide nonattainment areas in the U.S. is oxygenated to a minimum of 2.7 mass percent oxygen during four or five winter months.6 The heating value of the oxygenated product is about 2.7 mass percent lower than that of conventional gasoline. In addition, federal RFG and California Phase 3 RFG in federal RFG areas are typically oxygenated year-round to an average oxygen content of about 2 mass percent. The resulting heating values are about 2 percent lower than that of conventional gasoline. California Phase 3 RFG also has limits on distillation temperatures and aromatics content, which has the secondary effect of lowering the density of the fuel. These limits reduce heating value by about another 1 percent.
The gasolines that produced the results displayed in Figure 1.3 were specially formulated to span a wide range of compositions. The compositional variations were much greater than those separating conventional and reformulated commercial gasolines. Thus, the results provide solid evidence that RFG does not exert an unusual effect on fuel economy.
Individual drivers have reported decreases of 10 percent, 15 percent, and even 20 percent in fuel economy when they began using RFG. Not surprisingly, many of the claims are anecdotal. Most drivers do not keep continuous fuel-economy records, so they don’t have a meaningful fuel-economy baseline for the gasoline they previously used. Even with a baseline, a fuel-economy value based on the consumption of a single tank of gasoline can be misleading. Drivers interested in fuel economy should average results over several tanks of gasoline or, better yet, over several months of driving.

Heating Value
Heating Value The heating value (also referred to as energy content) of gasoline is its heat of combustion, or the heat released when a known quantity of fuel is burned under specific conditions. In the U.S., heating value is usually expressed as British thermal units (Btus) per pound or per gallon at 60°F. The international metric (SI) units are joules per kilogram (J/kg) or joules per cubic meter (J/m3) at 15°C. For gross heating value, the water produced by the combustion is assumed to be recondensed to a liquid. For the lower net heating value, the water is assumed to remain a gas. All engines exhaust water as a gas, so net heating value is appropriate for comparing different fuels. Because gasoline is sold by volume, it is customary to express gasoline heating values per unit volume, specifically, Btu per gallon (or J/m3). This is the value that correlates with fuel economy because fuel economy is expressed per unit volume (mpg) in the U.S. or volume per distance (L/100 km) in much of the rest of the world. The densities of the hydrocarbons in gasoline vary over a much wider range from their heating values per unit weight. Consequently, compositional changes that result in density changes are accompanied by changes in heating value per unit volume. If the density of a conventional gasoline decreases, its heating value per unit volume also decreases.
Adding oxygenates to conventional gasoline also decreases heating value.
Oxygenates have lower heating values than hydrocarbons on both unit-weight and unit-volume bases. The amount of decrease depends on the amounts and identities of the oxygenates.

Factors Affecting Fuel Economy

Fuel economy is affected by a vehicle’s size, weight, aerodynamics, fuel delivery system, engine design, and transmission type. These factors remain constant for a specific vehicle.
There are, however, many variable factors that influence fuel economy. As mentioned, the heating value of gasoline is one. Weather conditions, air conditioner use, road conditions, the route driven, traffic, driving speed, and driving style are others. Fuel economy is also affected by the mechanical condition of the car, including the engine tune, wheel alignment, and tire pressure. Some of these non gasoline factors have the potential to cause substantial changes in fuel economy. Table 1.4 lists average and maximum effects published by the U.S. Environmental Protection Agency (EPA).
Carbonaceous engine deposits can build up over time and degrade fuel economy and other performance attributes, but these problems can be reduced with the use of deposit control additives. This subject is discussed in detail in Chapter 6, “Gasoline Vehicles – Deposit Control.”
Winter-related factors can combine to lower fuel economy up to 20 percent compared to summer factors. These include rain or snow on the road, which increases tire resistance.
In addition, for safety a driver may need to slow down to a less fuel-efficient speed. In cold weather, a richer air-fuel mixture is required to start and warm up an engine. Much of the warm-up is done at idle because of the need to defog or defrost windows. Also, in many vehicles, the air conditioner is operated to assist defogging. More energy is required to overcome the resistance created by the higher viscosities of cold lubricants, including engine oil, transmission fluid, and differential lubricant.
Short trips are worse for fuel economy than long trips because a cold engine uses more fuel than a warm engine and requires more energy to overcome the resistance of cold lubricants. Traffic jams and bumper-to-bumper driving exact a heavy toll on fuel economy.

Fuel Economy Road Test
The results of a Wisconsin on-road fuel economy test demonstrate that some of the above factors can have a much bigger effect on fuel economy than a small percentage change in gasoline heating value.

The test was designed to minimize all factors affecting fuel economy except gasoline composition. Fueled with various gasolines, vehicles were driven over the same route of 100 miles (161 kilometers) of urban and suburban roads. The fuel economy of each vehicle was measured four times for each gasoline: once in the morning and afternoon of the same day and again in the morning and afternoon of one day a week later. In some cases, a vehicle was driven by the same driver both days. Other vehicles were driven by more than one driver. When the results for the two weeks were compared, most of the fuel economies in the second week were lower. The differences were greater than 10 percent for a quarter of the car-fuel combinations. Two factors that probably contributed to the week-to-week differences were driver changes and a weather change.
Ambient temperatures were lower in the second week; on some days, noontime temperatures were as much as 17°C (30°F) cooler than the average noontime temperature of the preceding week.
The gasolines used in the Wisconsin test were commercial gasolines, either a conventional gasoline or a federal RFG oxygenated with methyl tertiary butyl ether (MTBE), ethyl tertiary butyl ether (ETBE), or ethanol (EtOH). When the results for all the road tests of all the vehicles were combined, the average fuel economy of the three oxygenated federal RFGs was 2.8 percent lower than the average fuel economy of the conventional gasoline. This value was much less than the 10 percent week-to-week difference for some of the car-fuel combinations but within the range predicted by the differences in the gasolines’ heating values.

OTHER PERFORMANCE FACTORS
Many gasolines available around the world contain oxygenates. In engines without closed-loop feedback systems, oxygenated gasoline leans the air-fuel mixture. Fuel leaning can cause some degradation in driveability, depending on an engine’s calibration.
Without fuel additives, deposits form throughout an engine’s intake system, including in the fuel injectors, carburetor, intake manifold, and intake ports and on the intake valves. Deposits can be very deleterious to engine performance, degrading driveability, decreasing power and fuel economy, and increasing emissions.
Today, we commonly discuss gasoline or gasoline powered vehicles and their impact on air quality. A number of metropolitan areas in the U.S. fail to meet one or more federal air quality standards. In some of these areas, on-road vehicles are responsible for more than half of the emissions that either primarily or secondarily cause violations of air quality standards.
Other major metropolitan areas throughout the world also are experiencing serious air pollution problems.
This chapter explains who regulates emissions and how and why they do it. It also explains which emissions come from vehicles and how those emissions are formed. Finally, it explains how emissions are affected by gasoline characteristics and how gasoline is being reformulated to help reduce emissions.
The explanations are complicated because they involve complex regulations and complex science. As a consequence, keeping this review short and simple is challenging. The numerous acronyms and abbreviations are unavoidable; both government regulation and science use them heavily.

ja nu kas: http://translate.google.com/

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Kopš: 08. Dec 2010

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15 Feb 2013, 11:35:04 MIGs rakstīja:
Nu un kādās proporcijās ?

[ Šo ziņu laboja Niere, 15 Feb 2013, 13:27:34 ]

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14 Feb 2013, 21:14:40 mexa rakstīja:
ir starpība no kurienes ņem, pārbaudīts, it īpaši kādu vācu degvielu, viens paziņas čoms pat vadā no DE soļķi un pārdod-pircēji ir tam soļķim par pa dārgāku cenu... ar benžu tas pats. piem manā galā ir ingrīda-tirgo konfiskātu, tobiš viss kopā, to labi brauc, to ēd kā velns uz viena auto, uz 98 nemanās tajā dusā starpības pievedumā...

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15 Feb 2013, 13:44:35 mexa rakstīja:
studiju laikā nobraukti vismaz 40KKm ar vienu autosu(calibra 8v)mērot pēc dusu pumpjiem un kannām patēriņš bija mazāks uz Lukoil benžas, statoil drusku lielāks. uz izjūtam starpība ir manāma, es neesmu ar auto uz jūs, tā kā jūtu arī kas pa kam. zināmi cilvēki kas sporta autosos lej tikai no lukoila 98o, vai tik tā krokodila šoferis nebija h1tman . draugu izvērtējums arī krita par labu uz lukoilu. no russijas man vadā gan staoilu gan lukoilu, tur tā starpība teju nav manāma. un vispār no rus benžas esmu sajūsmā, itkā lamā vietējie, bet man autoss uz ru 92 skrien labāk nekā LV labs 95, biju šokā kad pirmoreiz ielēja. latvijas statiks man nepatīk un ar papīriem to neizskaust. igaunijā un tālāk somijā itkā bija labāks, bet tur es tik garām braucu

[ Šo ziņu laboja Niere, 15 Feb 2013, 14:03:14 ]

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23 Jun 2013, 01:50:06 Niere rakstīja:
pirmajā lapā šajā pašā diskursā viss atrodams.
jā, Tavs degvielas patēriņš ir normā.

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Braucu ar: visu kas rūc un nerūc

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No: Salaspils

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Braucu ar: GL1800, Versys650 sidecar

23 Jun 2013, 08:42:15 tuchka rakstīja:
Katram savs, tā vienmēr ir bijis
Vizinos ar FJR.. pirms statoila patēriņš bij 5,5-6l/100. Nu jau trīs mēnešus leju tikai statoil, jauda nav zudusi, patēriņš 4,5 - 4,8l/100 kopējā ciklā Gāzēju, brīžiem kārtīgi atvelku un arī ar sotaku mierīgi braucu, tad atkal pieleju bāku un .... ????? neticami mazs patēriņš

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Kopš: 27. Sep 2009

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Braucu ar: z750

23 Jun 2013, 01:54:52 EGLE rakstīja:

23 Jun 2013, 01:50:06 Niere rakstīja:
pirmajā lapā šajā pašā diskursā viss atrodams.
jā, Tavs degvielas patēriņš ir normā.

Sorry Sorry! (Aklajam pietiek pataustit vienreiz )

KAWASAKI Z 750 (04-06) * 6.83 L / 100 km
un ja pagāzē tad arī rodas sausums bakā tik Atri !

TNX

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