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What is the cause of diesel engine fuel ignition delay is?
The longer ignition delay can be caused by a number of factors including: lower intake air temperature, lower boost pressure due to turbocharger lag, lower combustion chamber wall temperature and more advanced dynamic injection timing.
What causes a diesel engine to miss?
There are actually three categories of misfires: fuel, ignition and engine mechanical. In diesel engines, a misfire is caused when the ignition is bad. Faulty electronics for a fuel system can hamper the flow to the engine, hampering the reactions necessary for combustion. Fouled injectors can lead to poor atomization.
How do you reduce ignition delay?
Hence, if n 2 is somewhat increased prior to the fuel being exposed to oxygen, the observed ignition delay, τ, should decrease. According to the two energy level system, τ can be decreased simply by increasing the fuel temperature prior to injecting or exposing the fuel to oxygen.
What are the factors affecting ignition lag?
Engine operating variables such as speed and load affect the ignition delay because they change the primary factors such as injection pressure, compression temperature, pressure and air velocity. It has been found that under normal running conditions, compression temperature and pressure are the major factors.
How do you tell if a diesel has a misfire?
Signs & Symptoms of Misfiring
- Sound. Depending on how good your muffler is, you may be able to hear a misfire in one or more cylinders.
- Smell. When a cylinder misfires, it will discharge an unburned, or partially burned, fuel-air charge into the exhaust stream.
- Power Pulses.
- Sight.
What does a misfiring diesel sound like?
So what does a misfire sound like? During a misfire, the engine will make a sudden sound that can be described as popping, sneezing, or backfiring. Backfiring occurs when unburned fuel exits the cylinder on the exhaust stroke and is then ignited farther in the system by the spark of the next cylinder.