Mechanical Engineering Exam > Mechanical Engineering Questions > The delay period in a petrol engine is of the...
Start Learning for Free
The delay period in a petrol engine is of the order of
- a)0.001 sec
- b)0.002 sec
- c)0.01 sec
- d)0.05 sec
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The delay period in a petrol engine is of the order ofa)0.001 secb)0.0...
The delay period is very short, about 0.002 sec. In high speed engines, this period will lead to significant crank movement.
Most Upvoted Answer
The delay period in a petrol engine is of the order ofa)0.001 secb)0.0...
Delay Period in a Petrol Engine
The delay period in a petrol engine refers to the time taken for the combustion process to occur after the spark plug generates a spark. It is the time interval between the instant the spark is produced and the initiation of combustion of the air-fuel mixture. This delay period is essential for the proper functioning of the engine and affects its overall performance.
Factors Affecting Delay Period
Several factors influence the delay period in a petrol engine, including:
1. Air-Fuel Mixture: The composition and quality of the air-fuel mixture significantly affect the delay period. A stoichiometric mixture (14.7:1 air-fuel ratio) generally has a shorter delay period compared to a lean or rich mixture.
2. Compression Ratio: Higher compression ratios tend to reduce the delay period as they increase the temperature and pressure within the combustion chamber, facilitating faster combustion.
3. Spark Timing: The timing of the spark plays a crucial role in determining the delay period. It must be precisely timed to ignite the air-fuel mixture at the optimal moment for efficient combustion.
4. Engine Temperature: Higher temperatures within the combustion chamber reduce the delay period by promoting faster combustion.
5. Engine Load: The load on the engine affects the delay period. Higher loads generally result in longer delay periods due to increased turbulence and slower combustion.
Order of Delay Period
The delay period in a petrol engine is typically of the order of 0.002 seconds. This means that the combustion process begins approximately 0.002 seconds after the spark is generated. It is important to note that this value can vary depending on the specific engine design, operating conditions, and other factors mentioned earlier.
Significance
Understanding and optimizing the delay period is crucial for maximizing the engine's performance and efficiency. A shorter delay period ensures efficient and timely combustion, leading to improved power output, fuel economy, and reduced emissions. Engine designers and manufacturers continually strive to minimize the delay period through various techniques, such as optimizing the air-fuel mixture, improving ignition systems, and enhancing combustion chamber design.
In conclusion, the delay period in a petrol engine is approximately 0.002 seconds. This value represents the time interval between the spark generation and the initiation of combustion. By considering factors such as the air-fuel mixture, compression ratio, spark timing, engine temperature, and load, engine designers aim to minimize this delay period for optimal engine performance.
The delay period in a petrol engine refers to the time taken for the combustion process to occur after the spark plug generates a spark. It is the time interval between the instant the spark is produced and the initiation of combustion of the air-fuel mixture. This delay period is essential for the proper functioning of the engine and affects its overall performance.
Factors Affecting Delay Period
Several factors influence the delay period in a petrol engine, including:
1. Air-Fuel Mixture: The composition and quality of the air-fuel mixture significantly affect the delay period. A stoichiometric mixture (14.7:1 air-fuel ratio) generally has a shorter delay period compared to a lean or rich mixture.
2. Compression Ratio: Higher compression ratios tend to reduce the delay period as they increase the temperature and pressure within the combustion chamber, facilitating faster combustion.
3. Spark Timing: The timing of the spark plays a crucial role in determining the delay period. It must be precisely timed to ignite the air-fuel mixture at the optimal moment for efficient combustion.
4. Engine Temperature: Higher temperatures within the combustion chamber reduce the delay period by promoting faster combustion.
5. Engine Load: The load on the engine affects the delay period. Higher loads generally result in longer delay periods due to increased turbulence and slower combustion.
Order of Delay Period
The delay period in a petrol engine is typically of the order of 0.002 seconds. This means that the combustion process begins approximately 0.002 seconds after the spark is generated. It is important to note that this value can vary depending on the specific engine design, operating conditions, and other factors mentioned earlier.
Significance
Understanding and optimizing the delay period is crucial for maximizing the engine's performance and efficiency. A shorter delay period ensures efficient and timely combustion, leading to improved power output, fuel economy, and reduced emissions. Engine designers and manufacturers continually strive to minimize the delay period through various techniques, such as optimizing the air-fuel mixture, improving ignition systems, and enhancing combustion chamber design.
In conclusion, the delay period in a petrol engine is approximately 0.002 seconds. This value represents the time interval between the spark generation and the initiation of combustion. By considering factors such as the air-fuel mixture, compression ratio, spark timing, engine temperature, and load, engine designers aim to minimize this delay period for optimal engine performance.
|
Explore Courses for Mechanical Engineering exam
|
|
Top Courses for Mechanical EngineeringView all
Question Description
The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer?.
The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer?.
Solutions for The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect 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 The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The delay period in a petrol engine is of the order ofa)0.001 secb)0.002 secc)0.01 secd)0.05 secCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup on EduRev and stay on top of your study goals
10M+ students crushing their study goals daily