Sentences with phrase «fuel combustion increased»

In the USA, industry emissions from fuel combustion increased by 3.8 %.

Not exact matches

The combustion of fossil fuel that increases carbon dioxide by 0.7 per cent per year decreases the oxygen by only 0.001 per cent per year (Ehrlich, Ehrlich & Holdren 1977, p. 79).

When burned, that can improve combustion in bursts, therefore increasing performance whilst having no influence on the fuel flow limit.

Second, analysis of isotopes, which can distinguish among sources of emissions, demonstrates that the majority of the increase in carbon dioxide comes from combustion of fossil fuels (coal, oil and natural gas).

«Fire whirls are more efficient than other forms of combustion because they produce drastically increased heating to the surface of fuels, allowing them to burn faster and more completely.

But these fuel cells require an electrocatalyst — a platinum surface — to increase the reaction rate, and the cost of the precious metal makes it hard for hydrogen fuel cells to compete economically with the internal combustion engine.

«The lower operating temperatures during cold start are due to increasing fuel efficiency in advanced combustion engines, which leaves less energy in the tailpipe exhaust,» said Abhaya Datye, a distinguished professor at UNM's Department of Chemical and Biological Engineering and study co-author.

For example, some car engines already have variable valve lift and timing, which provides greater control over the flow of air into and out of the combustion chamber; until now automakers have employed this system primarily to boost horsepower, but it can also be used to increase fuel economy.

Since carbon dioxide (CO2) is the natural by - product of the combustion of fuel, the increased standards would also address climate change by reducing tailpipe emissions of CO2.

Increased deposition of nitrogen from atmospheric sources because of fossil fuel combustion and forest burning.

By comparison, scenarios for fossil fuel emissions for the 21st century range from about 600 billion tons (if we can keep total global emissions at current levels) to over 2500 billion tons if the world increases its reliance on combustion of coal as economic growth and population increase dramatically.

Human - caused climate change has been occurring over the last 200 yr, largely because of the combustion of fossil fuels and subsequent increase of atmospheric CO2.

The lower operating temperatures during cold start are due to increasing fuel efficiency in advanced combustion engines, which leaves less energy in the tailpipe exhaust, said Datye, a study co-author.

The new study, published last week in the journal Environmental Research Letters, showed that emissions of sulfur dioxide, a common air pollutant released during coal and fossil fuel combustion, increased from 2000 to 2006, after which they started to decline.

The rapid rate of climate change since the Industrial Revolution has resulted from changes in atmospheric chemistry, specifically increases in greenhouse gases due to increased combustion of fossil fuels, land - use change (e.g., deforestation), and fertilizer production (Forster et al. 2007).

OECD research estimates that by 2050, carbon dioxide emissions from fuel combustion will have increased by more than 50 %.

The added lead increased the octane value of the fuel which gave the engineneers of old a better way to control the combustion rate in the internal combustion engine.

This 12 Valve mode results in swirl of the intake charge which increases combustion efficiency, resulting in improved low end torque and better fuel economy.

Variable camshaft timing helps maximize fuel economy by reducing the engine's pumping work via a delayed closing of the intake valve, which increases the expansion process of the combustion event.

A misfire is when the combustion cycle of your engine is interrupted, causing a sudden and severe loss of power while dramatically reducing fuel economy and increasing emissions.

The basic idea of the upgrade is to allow an increase in the air and fuel into the combustion chambers causing an «explosion» of power.

Unlike the other gasoline models, the Cruze's 2.0 diesel is only available with an automatic transmission, and is the only engine that features direct fuel injection — a modern engine innovation that promotes more efficient combustion and increases power relative to the volume of fuel used.

The high compression combustion results in significantly improved engine efficiency, resulting in 15 % increases in fuel efficiency and torque.

This technology has many advantages, but the most notable are increased power, less risk of detonation or knock, better fuel economy, and cooler combustion chambers.

The Jeep Grand Cherokee's available Flexible - fuel Vehicle (FFV) 4.7 - liter V - 8 engine incorporates electronic throttle control, two spark plugs per cylinder, increased compression ratio, improved cylinder - head port flow and a new combustion system.

For gasoline - powered vehicles, Honda will continue developing internal combustion engines which will increase fuel economy to what Ito called «the ultimate level».

With this new combustion chamber shape and the precise control of direct injection, the compression ratio has been increased to 11.1:1 (up from 10.5:1 on the previous port - injected engine), yet the engine still operates on regular unleaded fuel.

Packed with Variable Valve Timing, the Challenger finds more ways to maximize fuel by varying the intake valves» timing, which further improves combustion and performance, actually allowing to increase the Dodge's MPG.

Features include two - step variable valve lift, cooled EGR, upgraded variable - valve timing, a new intake manifold, high - tumble intake ports, shrouded combustion chambers, eight - hole fuel injectors with optimized atomization, multiple friction - reduction features, and an increased compression ratio of 11.3:1 (but still only requires 87 octane fuel).

Variable valve timing helps maximize fuel economy by reducing the engine's pumping work via a delayed closing of the intake valve, which increases the expansion process of the combustion event.

High pressure injectors of increased cross-section deliver fuel directly to the combustion chambers.

This unique feature improves the flow of fuel into the combustion chamber, which results in an increase in horsepower during towing and reduced emissions.

The engine also includes a Bosch ® HPCR fuel system to deliver precise fuel control and multiple injections per combustion stroke, which helps increase efficiency and reduce traditional «diesel clatter.»

The new engine also features a Bosch ® HPCR fuel system to deliver precise fuel control and multiple injections per combustion stroke, which helps increase efficiency and reduce traditional «diesel clatter.»

This dual - pump DI increases maximum pressure from 2,000 to 2900 psi, further atomizing fuel and improving combustion efficiency.

Significantly improved engine efficiency thanks to the high compression combustion, resulting in 15 percent increases in fuel efficiency and torque

While a larger displacement Atkinson cycle engine may offer less top - end horsepower than a traditional Otto internal combustion engine, its increased thermal efficiency allows for strong acceleration and better fuel economy, Saga said.

Other technologies have been introduced such as direct injection with fuel pressure increased to 250 bar and a special combustion chamber design to optimize the air - fuel mixture.

The combustion engine remains switched on and fuel consumption may increase.

This increases combustion efficiency, which translates to better performance, while reducing CO2 emissions and improving fuel consumption.

«Climate scientists presume that the carbon cycle has come out of balance due to the increasing anthropogenic emissions from fossil fuel combustion and land use change.

Since the industrial revolution the combustion of fossil fuels and deforestation have led to an increase of 26 % in carbon dioxide concentration in the atmosphere.

Most of these perturbations, tied either directly or indirectly to human fossil fuel combustion, fertilizer use, and industrial activity, are projected to grow in coming decades, resulting in increasing negative impacts on ocean biota and marine resources.

Globally, economic and population growth continue to be the most important drivers of increases in CO2 emissions from fossil fuel combustion.

John — In concurrence with Robert's comment, the CDIAC and most other sources attribute all or almost all of the 39 % increase in atmospheric CO2 to anthropogenic activity, but only a fraction of that (the major part) is due to fossil fuel combustion.

«Due to human activities such as the combustion of fossil fuels and deforestation, and the increased release of CO2 from the oceans due to the increase in the Earth's temperature, the concentration of atmospheric carbon dioxide has increased by about 35 % since the beginning of the age of industrialization.»

This proved that the increased CO2 concentration over the last century was due to fossil fuel combustion, not volcanic activity or an other source.

«In considering the question of human activity and climate change it is essential to distinguish between global warming, which is a progressive increase in the annual mean global temperature, and human - activity - induced greenhouse warming, as may, for example, be caused by the release of greenhouse gases into the atmosphere as a result of fossil fuel combustion or deforestation.»

On the naïve and scientifically silly assumption that the only way that plant - based carbon can get into the atmosphere is by people burning fuels, they exult that here indeed is the smoking gun: Decreases of C13 in the atmosphere mean that our sinful combustions are clearly identifiable as major contributors to the 100 ppm increase in CO2 since 1850.

Impacts of California's Five - Year (2012 - 2016) Drought on Hydroelectricity Generation — This comprehensive assessment of the costs to California of lost hydroelectricity during the five - year California drought (from October 2011 to the end of September 2016; the official California «water year» runs from October 1 to September 30) reveals an increase in electricity costs of approximately $ 2.45 billion, as well as a 10 percent increase in the release of carbon dioxide from California power plants due to the additional combustion of fossil fuels for electricity generation.