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Since, Fuels= Carbon + Hydrogen (i.e Hydrocarbons)
i) Longer the Carbon Chain in the Compound, Higher will be Knock.
ii) Straighter the Carbon chain again higher will be knocking.
iii) addition of Methyl Group as a side chain in Hydrocarbon decreases the Knock tendency.
iv) More closer and compact the Carbon structure, lesser is the Knock tendency.
From above points we can conclude that,
- Propane (C3H8) has lesser knock tendency than Butane (C4H10)
- Iso-Butane has lesser knock tendency than n-Butane
- Alcohols (especially Methanol & Ethanol) are two most promising future fuels with high octane no. i.e very less knock tendency.
Ref.: Internal Combustion Engines by V. Ganesan.
Internal Combustion Engines by Mathur and Sharma.
The World Petroleum Congress the Hague 1951.
What else can I help you with?
What is the chemical symbol for fuel?
A fuel is a complex mixture of many components; no chemical symbol.For methane gas the chemical formula is CH4.
What can fuel the chemical reactions in a cell?
chemical energy
What is leaded fuel?
Leaded fuel is a type of gasoline that contains tetraethyllead (TEL), a chemical additive used to boost octane ratings and prevent engine knock in older vehicles. However, leaded fuel is now largely phased out due to the harmful effects of lead emissions on human health and the environment.
What is The molecular structure of Fire?
Fire is not a substance but a chemical reaction known as combustion, involving the rapid oxidation of a fuel in the presence of oxygen. The molecular structure of the reactants typically includes hydrocarbons (like wood or gasoline) and oxygen (O2). During combustion, these reactants break down and form products such as carbon dioxide (CO2), water (H2O), and various other compounds, depending on the fuel. Therefore, fire itself does not have a molecular structure, but it is the result of chemical reactions between specific molecular structures of the involved substances.
Would burning diesel fuel be a chemical change?
Yes, burning diesel fuel is a chemical change because it involves a chemical reaction where the fuel reacts with oxygen in the air to produce heat, light, and new chemical compounds like carbon dioxide and water vapor. The original diesel fuel is transformed into different substances during combustion.
Sign of knock sensor going bad?
the only sign is if it goes bad it should trigger the check engine light, you wont notice loss in peformance in engine. all it does is when there is a knock in a cylinder, from bad fuel, it leans back on fuel to stop the knock.
What is the function of a knock sensor on a 2000 mercury villager?
the knock sensor monitors preignition,spark knock and sends signal to pcm,pcm responds by adjusting ignition timing and fuel timing until knock is gone.
What type of Energy is stored in fuel?
Chemical Energy.
What is the octane of jet fuel?
Jet fuel is kerosene, about the same stuff as diesel. Octane is a number that measures anti-knock properties of fuels. Diesels knock--that's how they work. Jets don't have enough compression to knock. Jet and diesel fuels would measure typically 15-25 "octane anti-knock". Sort of....
Is fuel exploding a chemical or physical change?
Fuel exploding is a violent Chemical Reaction when fuel is reacted with atmospheric oxygen.
What does a knock sencor do?
A knock sensor listens for the 'knock' (or pinking), that shows that the fuel is exploding, rather than burning. Via the engine management computer, it retards the timing of the spark, until the knocking stops. 'Knocking' can damage valves and piston crowns, if allowed to continue. A knock sensor allows different grades of fuel to be used, without damaging the engine.
What happens if you put regular unleaded fuel in a Volkswagen Passat the takes premium fuel?
That car has a knock sensor, so you won't destroy it. It will, however, run terrible because the timing's so retarded by the knock sensor.
What is the chemical symbol for fuel?
A fuel is a complex mixture of many components; no chemical symbol.For methane gas the chemical formula is CH4.
Which molecule is octane?
Octane is a hydrocarbon molecule with the chemical formula C8H18. It is a major component of gasoline and is used as a standard reference in the octane rating system that measures the anti-knock properties of a fuel.
What is the function of the knock sensor on the Lexus ES 300?
The knock sensor allows the computer to adjust the engine timing for maximum advance and fuel economy.
What can fuel the chemical reactions in a cell?
chemical energy
Why does your 93 Cadillac DeVille knock when the engine is accelerating?
If it is more of a ping than a knock then just try running some higher octane fuel in it. If is more of a knock it could be a rod or crankshaft bearing. If it is definitely a knock you should get it looked at right away.
