At which stroke the fuel is injected?
At which stroke the fuel is injected in the CI engine? Explanation: Fuel injection in the CI engines start at the end of the compression stroke. Fuel is injected directly into the combustion chamber.
How does the piston behave during intake stroke?
Intake stroke: the intake stroke draws air and fuel into the combustion chamber. The piston descends in the cylinder bore to evacuate the combustion chamber. When the inlet valve opens, atmospheric pressure forces the air-fuel charge into the evacuated chamber.
How does fuel injection system work?
A modern fuel injection system works by atomising the fuel at high pressure, mixing it with clean air as it passes the inlet manifold, before entering the combustion chamber of each cylinder. The key element of the electronic modern fuel injection system is the word “electronic.”
What is the difference between fuel injection and carburetor?
Unlike carburetors, a Fuel Injection system is comprised of a complex set of electronics and sensors. In carbureted systems the fuel gets drawn from the tank, while in a Fuel Injected system it depends on a fuel pump installed inside the tank for a fine-grained control over fuel flow.
What is the requirement met by the injection system?
What is the requirement met by the injection system? Explanation: None.
What causes fuel injection problems?
Usually, it’s the build-up of rust that causes a clogged fuel injection. This typically happens due to a source upstream in the petrol supply, for example, the fuel supply line or fuel rail. If you leave your car sitting idle without servicing for a long time, you might get clogged fuel injectors.
What is the meaning of intake stroke?
Definition of intake stroke
: the stroke in the cycle of an internal-combustion engine during which the fuel mixture is drawn in before compression.
What happens to the intake and exhaust valves during power stroke?
Because the intake and exhaust valves are closed, the combustion of the fuel takes place in a totally enclosed (and nearly constant volume) vessel. The combustion increases the temperature of the exhaust gases, any residual air in the combustion chamber, and the combustion chamber itself.
What is the position of intake and exhaust valves during intake stroke?
…the typical four-stroke-cycle engine, the intake and exhaust valves and the fuel-injection nozzle are located in the cylinder head (see figure).
Why fuel injection is better than a carburetor?
A fuel injection system precisely delivers fuel in the right amount and can tweak it according to several parameters resulting is less fuel wastage and better fuel efficiency. A carburettor is unable to adjust the fuel ratio according to the engine conditions.
Why do motorcycles still use carburetors?
Carburetors are your old-school, analog option, and they’re what all bikes relied on until electronic fuel injection began to appear in the ’80s. Nowadays, the vast majority of bikes have EFI, though plenty of smaller motorcycles and scooters still use carbs to help keep them affordable.
What are the disadvantages of fuel injection?
Disadvantages of a fuel injection system :
The fuel injection system is a lot more expensive than a carburettor upgrade. Repairing fuel injectors is not easy as compared with carburettors. The Air fuel ratio and mix of that will be excellent in a carburettor than a direct Injection system.
What are the advantages and disadvantages of petrol injection?
Advantages of Petrol Injection System:
Petrol injection system has improved the ratio of the volume of the fluid by this there is an increase in power. There is the decrease in fuel consumption. There are no effects by combustion on supplying the quality fuel by this compression ratio can be improved.
What are advantages of fuel injection?
Fuel Injection Advantages
Better engine life. It results in Enhanced engine efficiency. It also offers better fuel efficiency. More efficient burning of fuel results in cleaner environment.
What is the advantage of indirect fuel injection?
The advantages of the indirect injection (IDI) engine are its quieter combustion and a combustion system that is more amenable to high speed operation. The disadvantage of the IDI engine, is that the direct injection (DI) engine has a 10–15% lower fuel consumption.
Is direct or indirect injection better?
Direct injection diesel engines do have a number of advantages over their older counterparts. First off, DI engines have higher thermal efficiency and produce less soot, so they’re better for the environment. DI engines also have better performance potential, especially if they’re well maintained.
What’s the difference between direct and indirect fuel injection?
There are two types of injection systems, direct and indirect. Indirect injection or (IDI) is when the fuel injection is not directly injected into the combustion chamber. Instead, fuel goes into a pre-combustion chamber or an air cell to begin the process that then spreads into the main combustion.