The spark ignites the air /
fuel mixture in the engine cylinders.
By keeping an intake valve open during part of the compression stroke, some of the volume of unburned air /
fuel mixture in the cylinder moves back inside the intake manifold and lowers the volume being compressed, or «pumped.»
- The vehicle's computer is continually measuring the air /
fuel mixture in the engine.
The air -
fuel mixture in an engine's cylinders has a certain electrical conductivity, which varies — especially as «knock,» or detonation, occurs in a cylinder.
Detonation is caused by ignition of the air /
fuel mixture in the combustion chamber independent of the spark plug firing
The intake manifold directs the air -
fuel mixture in the engine to the corresponding cylinder where it is burned to produce power.
There are basically 3 things you need to consider for timing - engine RPM, air / fuel ratio, and volume of air
fuel mixture in the cylinder.
If they do it is usually at the fuel pump and would not impact your air /
fuel mixture in any way.
This is in part due to the compression ratio of the cylinder, how much the piston squeezes the air -
fuel mixture in the engine.
Conventional cars use an air -
fuel mixture in which all the oxygen and fuel is burned during combustion.
Not exact matches
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.
As it moves on, the crescent chamber expands and the
fuel mixture is sucked
in.
Hochul said her pitch is a
mixture of explaining some of the new industry clusters that officials are
fueling upstate — photonics
in Rochester, solar production
in Buffalo — as well as telling companies that taxes are lower.
Gasoline is a petroleum - derived liquid
mixture consisting primarily of hydrocarbons, used as
fuel in internal combustion engines.
Two - stroke engines produce a lot of pollution because the
fuel - air
mixture in them gets contaminated with the engine's lubricating oils.
Lighter components, including hydrogen and carbon monoxide
in a
mixture similar to Britain's old town gas, rise to the top of the chamber, from where they can be vented for use as
fuel.
The natural gas industry refuses to reveal what is
in the
mixture of chemicals used to drill for the fossil
fuel
The
mixture of houses, flashy
fuels, and brush fields
in full view of a large metropolitan area adds significantly to the challenges and complexity of even the smallest wildland fire.»
A 10-fold increase
in temperature would bring them into the realm of sparking reactions
in conventional fusion
fuel, a
mixture of the hydrogen isotopes deuterium and tritium, known as D - T.
«We have developed a new type of protective coating that enables a key process
in the solar - driven production of
fuels to be performed with record efficiency, stability, and effectiveness, and
in a system that is intrinsically safe and does not produce explosive
mixtures of hydrogen and oxygen,» says Nate Lewis, the George L. Argyros Professor and professor of chemistry at Caltech and a coauthor of a new study, published the week of March 9
in the online issue of the journal the Proceedings of the National Academy of Sciences, that describes the film.
These include a cleaning solvent called 1 - bromopropane, a wood preservative
mixture known as pentachlorophenol and cumene, which can be found
in fuel products and even tobacco smoke.
In their paper, the scientists described how quickly a
mixture of jet
fuel and oxygen ignites depending on different conditions.
The
fuel starts out as a
mixture of uranium isotopes, and the plutonium isotopes are «bred»
in place.
«The typical Mexico City car is a Volkswagen beetle several years old, running on a very rich air -
fuel mixture of 8:1
in order to develop adequate power at the city's altitude of 2400 metres,» says Stephen Bryen of Lean Power Corporation of Silver Spring.
This
mixture of metal powder,
fuel and metal oxide releases heat when ignited and is best known for its role
in fireworks and welding.
Orbiting scientists are also studying bone loss, aging and gene expression and performing combustion experiments that show how flames change shape and how different
fuel mixtures behave
in space.
The image this approach evokes for me is that of designing a car
in which the driver has to twist dozens of individual knobs to control the
fuel mixture, spark advance and valve clearances, among other things — when all he wants to do is go from one place to another.
The traditional cylinder - piston design used
in engines means that only the piston head itself produces motive force, as it is pushed up and down by the expansion of the burning
fuel - and - air
mixture.
Hydrogen, being an extremely light element, makes up only about 5 % of the weight of a rocket
fuel mixture, and can thus be imported from Earth; heavy insulation and some gelling of the
mixture with methane (as the hydrogen will not be fed directly into an engine) will reduce
in - space boil - off to negligible levels.
It will focus on catalyst development for four applications: proton exchange membrane
fuel cells to convert stored energy
in non-fossil
fuels into electricity; electrolysers for splitting water into oxygen and hydrogen — a potential clean
fuel cell source; syngas, a
mixture of CO and H2, which is generated from coal, gas and biomass, and widely used as a key intermediate
in the chemical industry; and lithium - air batteries.
Davidson led PPPL when TFTR began using a
mixture of half deuterium and half tritium for
fuel in 1993.
So
in much the same way as your car needs a regular service, good quality
fuel and a
mixture of city and country driving, your metabolism requires a healthy diet and a varied exercise regime to achieve optimal performance.
Available
in a range of sizes, with or without insulation, these bottles are ideal for carrying pure water or our Hammer Nutrition
fueling mixtures.
The major difference from carbohydrate overfeeding is that acetate directly reduces lipolysis and replaces fatty acids
in the tissue
fuel mixture, without mediation by insulin.
In direct Injection, the injector sprays the air
fuel mixture directly into the cylinder thus you have optimum computer controlled combustion.
When you suddenly push the gas pedal and the car doesn't react well, doesn't pickup but hesitates it means that uneven
fuel mixture is getting
in.
I am aware other things may need to accompany this; for example WOT
in 6th gear should not richen the
mixture as WOT does normally, etc., so let's say the car was produced from the factory with the computer and associated electronics accommodating the
fuel - gear.
This usually means that there is an issue with the
mixture of air and
fuel reaching the engine (more on that
in a bit).
This is not a big deal when the engine is running (worst possible side - effect: higher
fuel consumption), but can prevent the engine from starting as the engine reacts more sensitively to changes
in fuel -
mixture during the cranking phase.
Fuel economy isn't bad, either; according to the trip computer, I averaged 24 mpg over a 385 - mile trip (more than one tankful),
in a
mixture of freeway and two - lane driving.
However your thinking is correct when applied to
fuel injected systems, where a blockage
in the return line would raise
fuel pressure, thus enriching the
mixture.
As @Fred Wilson mentioned
in his comment, if the MAF sensor that you replaced isn't the one made specifically for your car, then it won't be able to correctly control the air
fuel mixture.
Using a lower octane
fuel than recommended can result
in the
fuel / air
mixture self - igniting (commonly called «knocking»).
The result is an incorrect air -
fuel mixture than can create a number of problems, such as hard starting, a rough idle, hesitation, misfiring or a drop
in fuel economy — issues that could, without proper diagnosis, seem to have other causes, such as incorrect ignition timing or fouled spark plugs.
Too much
fuel during the start and warm up, but
in normal operation the
mixture is correct and it burns soot from the plugs.
The CO is
in the normal output range for an engine that is running normally and within acceptable
fuel mixture limits.
Deposits
in the combustion chamber that heat up to the point that they can ignite the air /
fuel mixture
At WOT (Wide Open Throttle) at very low RPM, the engine will almost stop, as if there is a big hole
in the
fuel map and it doesn't provide the correct
mixture.
Their primary role is to provide feedback to the
fuel management to determine if the air -
fuel mixture being fed into the engine is being mixed
in the right ratio.
This is because it will have a race camshaft which opens the inlet valves very early, it may hold the inlet and exhuast valves open at the same time to improve chamber filling using the negative pressure
in the exhaust (i.e. scavange it's inlet plenum) and it will keep the valves open for as long as possible to let the maximum about of air /
fuel mixture into the cylinders.