Sentences with phrase «fuel combustion engines»

Not exact matches

It's a full - flow, stage - combustion engine, which maximizes the theoretical momentum that you can get out of a given source of fuel and oxidizer.

This means it has a battery and an electric motor; there's no internal combustion engine, fuel tank or tailpipe.

For a long time, electric car buyers were spared the 180 percent import tax that Denmark applies to vehicles fueled by an internal combustion engine.

Additionally, with traditional combustion engine fuel - efficiency improving rapidly, we do not see the cost of EDV ownership providing consumers with a better value than traditional vehicles.

Hydrogen could be an excellent alternative to internal combustion engines, but the cost of hydrogen fuel cells have so far prevented a breakthrough

The swept volume of one combustion chamber is calculated («swept volume» being the space available for the fuel mixture before combustion; generally speaking, the more space, the more fuel and the more power produced), then multiplied by the number of cylinders in the engine.

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.

Despite decades of research, hydrogen fuel cells have failed to replace combustion engines in cars, thanks in large part to the cost of their platinum catalysts, says Signe Kjelstrup at the Norwegian Academy of Science and Letters in Oslo.

The device produces an electric field near the fuel injector and the field thins out the fuel which means that the droplets of fuel that get injected into the engine are smaller, which appears to give more efficient and cleaner combustion.

Gasoline is a petroleum - derived liquid mixture consisting primarily of hydrocarbons, used as fuel in internal combustion engines.

Emerging technologies could make the internal combustion engine substantially more fuel - efficient, even as green vehicles make inroads

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.

«Engine developers can use this information to validate computer models and design advanced engine combustion strategies that will improve fuel economy for consumers while also lowering tailpipe pollutant emissions.&Engine developers can use this information to validate computer models and design advanced engine combustion strategies that will improve fuel economy for consumers while also lowering tailpipe pollutant emissions.&engine combustion strategies that will improve fuel economy for consumers while also lowering tailpipe pollutant emissions.»

Envirofit's fix replaces the engine's carburetor, which mixes the air and fuel before they enter the combustion chamber, with a direct in - cylinder fuel - injection system.

But while fuel - cell vehicles are pushing the technological frontier, they drive like any traditional internal combustion engine vehicle, with a 300 - mile range and a refueling time of less than five minutes.

The image shows a plug - in hybrid electric vehicle, which also has a fuel tank and a combustion engine, but the technology system works equally well with a purely electric vehicle.

Saab's combustion - control engine has leapfrogged the manufacturers still studying fuel cells, methanol fuels, and electrics by reinventing an ordinary internal - combustion gasoline power plant that recycles unburned components of its exhaust.

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.

That's because fermenting corn into ethanol delivers less liquid fuel energy for internal combustion engines than does burning the kernels to generate power for electric motors.

Rocket engines, gas turbines and diesel engines experience conditions in their combustion chamber that exceed the critical conditions of their fuel, and supercritical finely atomized sprays are used to coat tablets in the production of medicines.

When the fuel reaches the disk, centrifugal force flings it out to the perimeter and forces it into the engines» combustion chambers.

He adds: «In theory, you could have a plug - in hybrid with a renewable fuel powered [internal combustion engine] and eliminate the need for petroleum all together.»

And the logistics and transport industries will have to switch from internal combustion engines to fuel cells and driverless transport.

The use of alcohol as a fuel for internal combustion engines, either alone or in combination with other fuels, has been given much attention mostly because of its possible environmental and long - term economical advantages over fossil fuel.

«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.

(Even in such a case, however, the Volt would consume some fuel; periodically the car's internal combustion engine automatically starts up and burns some gas in order to perform self - diagnostic tests and keep itself lubricated.)

One area of their research seeks to match engine combustion modes with improved fuel properties to create higher efficiency and lower emission transportation technologies.

But Recchia - O'Neill is certainly at the forefront of a transformation of the U.S. — and global — auto market from standard gasoline - fueled internal combustion engines to greener vehicles.

«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.

Despite the unconventional powertrain and fuel tank, the car itself is little different from Reynard's internal - combustion engine models.

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.

Preuss says that an internal combustion engine typically achieves 15 per cent efficiency in converting fuel to power.

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.

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.

«The nice thing about fuels — and the reason why we still have a lot of internal combustion engines rather than electric engines — is that chemical fuels have an enormous energy density.

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.

But Bryen says that the same sensor technology, and the algorithms controlling fuel - air mixtures, can also improve the efficiency of fuel - injection engines, including the latest Japanese designs with multiple valves and stratified charge combustion.

To improve fuel efficiency, advanced combustion engines are being designed to minimize the amount of heat wasted in the exhaust.

Also of interest are studies of engine combustion, which affects fuel economy.

These new trucks — which employ a diesel combustion engine along with a hydraulic high - pressure accumulator that stores energy captured during braking — get 35 percent better fuel economy and generate as much as 30 percent fewer greenhouse gas emissions as compared to the non-hybrid diesel - powered vehicles they are replacing.

Hydrogen - powered fuel cells are regarded as a clean alternative to conventional combustion engines, as, aside from electric energy, the only substance produced during operation is water.

Hydrogen fuel cells are a promising green energy solution, producing electricity much more efficiently and cleanly than combustion engines.

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 →

Argonne engineers are currently working with scientists at the Advanced Photon Source (fuel - spray project), Chemical Sciences and Engineering Division (combustion chemistry) and are developing collaboration with researchers in the Leadership Computing Facility to optimize this combustion approach for practical engines.

Through our Vehicle, Bioenergy, and Fuel Cell Technologies Offices, EERE advances the development of next - generation technologies to improve plug - in electric and other alternative - fuel vehicles, advanced combustion engine and vehicle efficiency, and produce low - carbon domestic transportation fuFuel Cell Technologies Offices, EERE advances the development of next - generation technologies to improve plug - in electric and other alternative - fuel vehicles, advanced combustion engine and vehicle efficiency, and produce low - carbon domestic transportation fufuel vehicles, advanced combustion engine and vehicle efficiency, and produce low - carbon domestic transportation fuels.

The capabilities of Test Cell 1 include a fuel / air combustion skid for energy input; cooling systems for heat removal; 130 kW eddy - current dynamometer for precision power measurements; and instrumentation, system protection, and power control channels.For measuring the thermal output of fuel - fired thermal energy systems, such as a gas - fired liquid - metal evaporator for Stirling engines, Test Cell 1 offers a gas - gap calorimeter, which simulates the engine by allowing the liquid metal to condense at operating temperatures.

The chemical bonds in hydrogen gas, for example, could power fuel cells, internal combustion engines or generators.

In supersonic engines, RM enhances combustion efficiency by blending the fuel and the oxidizer.

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.

Plug - in hybrids benefit from the more efficient use of fossil fuels in electricity generation even now and so have lower emissions than internal combustion engine cars, and if they get their juice from renewables, emissions would be very low indeed.