Mechanical Engineering Exam > Mechanical Engineering Questions > Divided chamber diesel engines use lower inje...
Start Learning for Free
Divided chamber diesel engines use lower injection pressure compared to open chamberengines because
- a)Pintle nozzles cannot withstand high injection pressure
- b)High air swirl does not require high injection pressure for atomization
- c)High injection pressures may cause overpenetration
- d)High injection pressure causes leakage of the fuel at the pintle
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Divided chamber diesel engines use lower injection pressure compared t...
Introduction:
Divided chamber diesel engines are a type of combustion system where the combustion chamber is divided into two parts: a main chamber and a smaller pre-chamber. These engines are designed to improve fuel efficiency and reduce emissions. In divided chamber engines, the injection pressure is lower compared to open chamber engines for several reasons.
Explanation:
1. High air swirl:
One of the main reasons for lower injection pressure in divided chamber engines is the presence of high air swirl. The pre-chamber in these engines is designed to create a high swirl of air during the intake stroke. This high swirl helps in better atomization of fuel and air mixture, improving the combustion process. As a result, lower injection pressure is required to achieve the desired level of atomization.
2. Atomization:
Atomization is the process of breaking down the fuel into small droplets to enhance its mixing with air. In divided chamber engines, the high air swirl already provides a good level of fuel and air mixing. Therefore, lower injection pressure is sufficient to achieve the required atomization. Higher injection pressure may cause excessive atomization, leading to overpenetration and inefficient combustion.
3. Overpenetration:
Overpenetration refers to the excessive penetration of fuel into the combustion chamber. When the injection pressure is too high, the fuel may penetrate deeply into the combustion chamber, leading to poor mixing with air and incomplete combustion. This can result in increased emissions and decreased fuel efficiency. Therefore, lower injection pressure is preferred in divided chamber engines to avoid overpenetration.
4. Pintle nozzles:
Pintle nozzles are commonly used in divided chamber engines. These nozzles have a small opening through which fuel is injected into the combustion chamber. While pintle nozzles are capable of withstanding high injection pressures, it is not necessary to use high pressures in divided chamber engines. The lower injection pressure helps in achieving better control over fuel delivery and optimizing the combustion process.
Conclusion:
In conclusion, divided chamber diesel engines use lower injection pressure compared to open chamber engines due to the presence of high air swirl, which provides better atomization of fuel and air mixture. Lower injection pressure helps in avoiding overpenetration and allows for better control over fuel delivery. While pintle nozzles can withstand high injection pressures, it is not necessary to use high pressures in divided chamber engines.
Divided chamber diesel engines are a type of combustion system where the combustion chamber is divided into two parts: a main chamber and a smaller pre-chamber. These engines are designed to improve fuel efficiency and reduce emissions. In divided chamber engines, the injection pressure is lower compared to open chamber engines for several reasons.
Explanation:
1. High air swirl:
One of the main reasons for lower injection pressure in divided chamber engines is the presence of high air swirl. The pre-chamber in these engines is designed to create a high swirl of air during the intake stroke. This high swirl helps in better atomization of fuel and air mixture, improving the combustion process. As a result, lower injection pressure is required to achieve the desired level of atomization.
2. Atomization:
Atomization is the process of breaking down the fuel into small droplets to enhance its mixing with air. In divided chamber engines, the high air swirl already provides a good level of fuel and air mixing. Therefore, lower injection pressure is sufficient to achieve the required atomization. Higher injection pressure may cause excessive atomization, leading to overpenetration and inefficient combustion.
3. Overpenetration:
Overpenetration refers to the excessive penetration of fuel into the combustion chamber. When the injection pressure is too high, the fuel may penetrate deeply into the combustion chamber, leading to poor mixing with air and incomplete combustion. This can result in increased emissions and decreased fuel efficiency. Therefore, lower injection pressure is preferred in divided chamber engines to avoid overpenetration.
4. Pintle nozzles:
Pintle nozzles are commonly used in divided chamber engines. These nozzles have a small opening through which fuel is injected into the combustion chamber. While pintle nozzles are capable of withstanding high injection pressures, it is not necessary to use high pressures in divided chamber engines. The lower injection pressure helps in achieving better control over fuel delivery and optimizing the combustion process.
Conclusion:
In conclusion, divided chamber diesel engines use lower injection pressure compared to open chamber engines due to the presence of high air swirl, which provides better atomization of fuel and air mixture. Lower injection pressure helps in avoiding overpenetration and allows for better control over fuel delivery. While pintle nozzles can withstand high injection pressures, it is not necessary to use high pressures in divided chamber engines.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Top Courses for Mechanical EngineeringView all
Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer?
Question Description
Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer?.
Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Divided chamber diesel engines use lower injection pressure compared to open chamberengines becausea)Pintle nozzles cannot withstand high injection pressureb)High air swirl does not require high injection pressure for atomizationc)High injection pressures may cause overpenetrationd)High injection pressure causes leakage of the fuel at the pintleCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup