Sentences with phrase «fuel combustion on»

But the potentially calamitous impact of clearance for mining, logging and ranching, combined with the longer - term impact of human - induced climate change, driven by fossil fuel combustion on a global scale, had to be identified by complex computer simulations.

The backcloth to California's climate — the overall annual precipitation — may not change greatly as the world, and the U.S. with it, warms as a consequence of greenhouse gas emissions from fossil fuel combustion on a global scale.

The backcloth to California's climate — the overall annual precipitation — may not change greatly as the world, and the US with it, warms as a consequence of greenhouse gas emissions from fossil fuel combustion on a global scale.

There's a slow cooling trend, as expected from the slowly decreasing insolation (the Milankovitch cycle), followed by an unexpected temperature spike at the end — the result of fossil fuel combustion on a global scale.

Not exact matches

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

This initiative will create numerous jobs and move our region into the 21st century by working with green technologies that reduce our reliance on the combustion of fossil fuels.»

One way that automakers aim to improve fuel economy on internal combustion engines is by altering the transmission, which can boost performance by an estimated 5 to 10 percent.

The recently published study shows, based on the available information, that traffic (25 %), combustion and agriculture (22 %), domestic fuel burning (20 %), natural dust and salt (18 %), and industrial activities (15 %) are the main sources of particulate matter contributing to cities» air pollution.

Smouldering (or smoldering in American spelling) combustion is a flameless form of combustion, deriving its heat from oxidations occurring on the surface of a solid fuel.

Initially, the researchers have focused on the combustion of liquid fuel sprays found in engines, where the extreme pressures and temperatures create an environment that is optically challenging.

«You can change the shape of the combustion chamber, the injection pressure, the number of pulses, how much fuel is in each pulse, the orientation of the injectors, and on and on.

Other R&D efforts in alternative forms of power focus on developing fuel cells, alternative forms of combustion such as GDI and HCCI, and even the stored energy of compressed air.

(Yashwanth, B. L.; B. Shotorban; S. Mahalingam; D. R. Weise, «A numerical investigation of the effect of moisture content on pyrolysis and combustion of live fuels,» Paper D402, Central States Section of The Combustion Institute, Spring Technical Meeting, Tulsa, OK, March 17 - 18, 2014)

For example, controlling fossil - fuel combustion could reduce atmospheric nitrogen deposition on both land and sea.

«Most scenarios consistent with 2 °C used in the IPCC Fifth Assessment Report largely depend on carbon capture and storage (CCS), both from fossil - fuel combustion and, particularly, bioenergy,» said Andrew.

«That's why we are concentrating on building high - technology combustion engine cars, hybrid cars, as well as electric cars powered either by batteries or fuel cells.

The reason for this choice is that constant - speed races like the Indianapolis 500, which take place on oval tracks, are better for internal combustion engines because those are most efficient at constant speed, yet waste fuel and create extra pollution in stop - start driving.

Those electric cars — combined with improvements in the fuel efficiency of existing internal combustion engines, new hybrid power trains and even fuel - cell vehicles — could begin to reduce the roughly $ 1 billion a day the U.S. spends on imported oil.

However, its future potential uses are significantly limited by scarcity and cost, as well as the fact that platinum readily binds with carbon monoxide, which «poisons» the desired reactions, for example in polymer electrolyte membrane (PEM) fuel cells, which are the leading contenders for small - scale and mobile power generation not based on batteries or combustion engines.

Human emissions however are on the decline in many countries due to more strict pollution controls on power plants like burning low - sulfur fuel and technological advances to remove it during and after combustion.

In 1996, when climate research was more certain about the link between fossil fuel combustion and climate change than during the time of Shaw's memo, Exxon's new chairman and chief executive Lee Raymond said in a speech in Detroit: «Currently, the scientific evidence is inconclusive as to whether human activities are having a significant effect on the global climate.»

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.

Like other major automakers, Audi (and its parent Volkswagen Group) is working on meeting its medium - term regulatory requirements (e.g., in the 2020 timeframe) by reducing the average fuel consumption of its new vehicles using a combination of three primary measures: optimizing its combustion engines for greater efficiency; developing alternative drive... Read more →

Human influences on the climate (largely the accumulation of CO2 from fossil fuel combustion) are a physically small (1 %) effect on a complex, chaotic, multicomponent and multiscale system.

Metaphorically, debaters discover the fire, make internal combustion engines which bang and eventually act as two co-pilots of a plane: they switch on gases, engines begin to buzz, making together the synchronized operations allowing the take - off until the plane reaches its cruising speed: The rhythm and logic fueling each other.

If this turns out to be correct, once the fuel molecule combines with the air molecule, how does combustion occur from there?Does the fuel molecule just rapidly release energy, thus the nearby air molecule start moving rapidly, and push on the piston head to produce power?

Toyota is developing many powertrains for the future, including a fuel - cell system for heavy - duty commercial trucks, but remains bullish on its latest internal - combustion engines.

I've read on the internet, in a couple of maintenance books and asked a few buddy mechanics and they all seem to point to the fact that a healthy diesel engine should not produce black smoke and that the common reason why this happens is because of too much fuel to not enough oxygen leading to incomplete combustion.

Without getting too detailed about the inner workings of a turbo, it's basic function is to provide on - demand power to the engine by forcing more air (and thus, more fuel) into the combustion chamber.

In reality, 2017 was the year that traditional automakers ramped up their counter assault on Tesla's electric vehicles, with plans for everything from fuel cells and solid - state batteries to new ways to make the internal combustion engine cleaner and more efficient.

Fuel in injected on the «suck» stroke, when the piston crown is traveling down the bore, thus effectively creating negative pressure in the combustion chamber.

During the 24 hours of the Le Mans race, each car will be given a «fuel energy allocation» per lap, differing slightly depending on whether the internal combustion element is fuelled by petrol or diesel.

Due to the behavior of the working fluid (air and fuel mixture) before and after combustion, which have physical limitations on their flow, as well as their interaction with the ignition spark, the optimal valve timing, lift and duration settings under low RPM engine operations are very different from those under high RPM.

The engine control computer will determine how much fuel to inject into the combustion chambers based on this data.

At low RPM only one valve on the intake opens fully, promoting combustion chamber swirl and improved fuel atomization.

I've known Turner for years and first met him when he was at Lotus (he had two stints at the Norfolk company), where he worked on the Corvette ZR1 engine, Lotus's own V8 and numerous skunkworks projects, including a test engine nicknamed Omnivore for its ability to run on virtually any fuel, and an optical engine that allowed the combustion process to be observed through a transparent cylinder.

The car runs on 100 octane fuel to avoid knocking and premature combustion issues as the high octane fuel requires higher heat / compression rate for the combustion and best used with the powerful turbocharged engines.

The result is a net CO2 reduction of up to 70 per cent on a well - to - wheel - basis, the measurement of CO2 release of a fuel from its production (well) to its combustion or deployment (wheel).

On each stroke, six individual jets spray fuel directly into the combustion chamber, mixing with the incoming air.

On the new Isuzu engine each fuel injector is moved from the intake manifold to the cylinder head so that it is actually spraying fuel into the combustion chamber.

The fuel also has a cooling effect on the combustion that allowed the M engineers to endow the engine with a high compression ratio: yet another technical attribute that contributes to both performance and efficiency, while also reducing exhaust emissions and even having a positive effect on how the engine sounds.

Charge - depleting mode allows a fully charged PHEV to operate exclusively (or depending on the vehicle, almost exclusively, except during hard acceleration) on electric power until its battery state of charge is depleted to a predetermined level, at which time the vehicle's internal combustion engine or fuel cell will be engaged.

Today's gas - electric hybrids are the among the most fuel efficient and greenest cars among vehicles relying on internal combustion power.

The stratified charge puts a mixture that's richer near the spark plug for easy ignition, while other areas on the combustion chamber have a leaner fuel / air ratio.

For example, when towing a trailer on a hot summer day, Silverado and Sierra's combustion system can reduce the need to trim back spark advance to control detonation, helping maintain both performance and real - world fuel efficiency.

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.

While the compact combustion chamber and higher compression ratio on gasoline engine helps to improve engine efficiency, the advanced thermal management system in diesel engine along with low friction engine oil and modified fuel injection system help diesel engine in faster warm up and lower frictional losses.

Direct injection's precise fuel delivery enables more complete combustion to help reduce emissions, particularly on cold starts — the time when most engine emissions are typically created.

The first two years of work focused on the combustion chamber and making the air flow and fuel burn as efficient as possible, said Jordan Lee, chief engineer for the engine program.

Key changes to the engine include moving the spark plug to a central location in the combustion chamber and pistons that have a complex design on the surface to contain the air - fuel mixture.