Topic: Valve Overlap
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Answers to Common Questions
What is purpose of valve overlap?
It improves the efficiency of the engine by allowing better exhaust out flow and intake in flow. Read More »
Source: http://wiki.answers.com/Q/What_is_purpose_of_valve_overlap
What is valve overlap?
The portion of the operating cycle of a reciprocating engine in which, when the piston is passing TDC (top dead center) on the exhaust stroke, both the intake and exhaust valves are open. Valve overlap increases the efficiency of the engine... Read More »
Source: http://wiki.answers.com/Q/What_is_valve_overlap
What is meant by the term valve overlap?
There is a short time between the exhaust and intake stroke where all the valves are slightly open at the same time. This period of time is called valve overlap. This is because the intake valves are just starting to open as the exhaust val... Read More »
Source: http://wiki.answers.com/Q/What_is_meant_by_the_term_valve_overlap
More Common Questions
Answers to Other Common Questions
Overlap is where both Exhaust and Inlet valves on the same cylinder are open at the same time., this happens at around Top Dead Centre as the Inlet needs to be open as soon as the piston starts to go down the bore while the Exhaust needed t...
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Source: http://wiki.answers.com/Q/What_does_the_term_valve_overlap_mean
High performance piston aircraft engines do have valve overlap, just like high performance engines used in land vehicles, and for the same reasons. Listen to the Continental O-470, IO-520, IO-550, even IO-360 at idle (or Lycoming IO-540) an...
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Source: http://wiki.answers.com/Q/When_valve_overlap_happens_to_aircraft_...
High end Rpm output tails sooner, engines idle is lumpy, emissions are higher, too much overlap can cause rough low rpm driving, more chance of detonation.
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Source: http://wiki.answers.com/Q/What_are_the_disadvantages_to_have_a_la...
It is defined as a certain period in which both the intake and exhaus...
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Source: http://www.chacha.com/question/what-is-valve-overlap-in-a-recipro...
Overlap actually has to do with inertia of the flow of the fuel/air mixture (from my days in school in the 1960s). As fuel is drawn into the cylinder, there is some inertia in its flow. Just as the piston starts its compression stroke (a fe...
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Source: http://answers.yahoo.com/question/index?qid=20100211111712AA9sXEw
well u c, u take your 2inch willy and wank so hard it falls of then u pick it up and stick in your exzaust and start the enging and watch it explode. then you go and glue it all together and sell it on eBay.
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Source: http://wiki.answers.com/Q/How_does_valve_overlap_is_removed_in_ve...
It means the intake and exhaust valves overlap somewhat in opening and closing. This is due to the inertia of the charge coming in and exhaust going out. All modern vehicles have some overlap for maximum efficiency. Performance engines have...
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Source: http://answers.yahoo.com/question/index?qid=20100527221252AAOeme2
