Mechanical Engineering - Automobile Engineering - Discussion
Discussion Forum : Automobile Engineering - Section 6 (Q.No. 1)
1.
If the valve clearances are excessively large, the problem that can arise is
Discussion:
13 comments Page 1 of 2.
Tesfamariam said:
7 years ago
The answer is not correct because excessive valve clearance makes the valve opening too late but makes valve closing to early.
(1)
Dheeraj said:
1 decade ago
Valve will be completely closed by spring force but the valve opening time is reduced leading to inefficient operation.
Sagar said:
1 decade ago
Increased valve clearance has the effect of increasing low end torque by decreasing valve overlap.
Kishor prasad said:
1 decade ago
Excessive valve clearance gives the tappet noise and reduces the valve opening may reduces the engine efficiency.
Subhash Maurya said:
10 years ago
If valve clearance excessive then exhaust gasses will be not discharged from the cylinder completely so engine overheated caused by pre ignition.
Ramchandra Singh said:
9 years ago
Due to valve clearence, excessive exhaust gases not discharge completely, the result is engine overheating.
Atul jha said:
8 years ago
Excessive valve clearance means valve face will not open fully thereby intake suction less air will be sucked and black smoke coming from exhaust side. Also, in exhaust stroke tdc valve overlap will be less and may be preignition.
Manthan said:
8 years ago
This is impossible. If the valve clearance is too high, valve will close like normal.
Incomplete valve closure will only occur only if there is a negative valve clearance. That is the tappet screw is overnight.
Incomplete valve closure will only occur only if there is a negative valve clearance. That is the tappet screw is overnight.
Amanpreet Singh said:
8 years ago
According to me, D is the correct option.
Vinder said:
8 years ago
Tappet clearance not valve clearance because valve is closed with the help of high tension spring.
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