Auto shutdown problem in automobile(motorcycle)

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Discussion Overview

The discussion revolves around the issue of an automobile engine, specifically in motorcycles, shutting down automatically when the clutch is applied. Participants explore potential causes and related concepts, including mechanical and fuel system interactions, as well as the role of the choke during cold starts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that a faulty kickstand cut-off switch may cause the engine to shut down when the clutch is applied.
  • Another participant notes that the issue seems prevalent in winter and speculates that it may relate to heat in the cylinder and the function of the choke in fuel delivery.
  • A further explanation of the choke's role in improving fuel atomization during cold starts is provided, but it is questioned whether there is a direct relationship between the clutch operation and fuel supply.
  • A request for information about six-stroke engines is made, indicating interest in related mechanical concepts.

Areas of Agreement / Disagreement

Participants express differing views on the cause of the engine shutdown, with some attributing it to mechanical issues like the kickstand switch, while others consider the effects of temperature and fuel delivery. The discussion remains unresolved regarding the exact relationship between the clutch and fuel supply.

Contextual Notes

Participants mention various assumptions regarding engine operation, fuel atomization, and the effects of temperature, but these are not fully explored or resolved within the discussion.

Who May Find This Useful

Individuals interested in motorcycle mechanics, automotive engineering, or those experiencing similar issues with engine shutdowns may find this discussion relevant.

jack001
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I have a doubt regarding automobile like bikes.
While driving, on applying clutch, (sometimes) the engine gets shutdown automatically(may be you might have experienced or noticed somewhere). So what might be the reason behind this. Please give your suggestion.
Thank you.
 
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You might have a problem with your kick stand cut off switch. This switch cuts off the engine when you put your transmission in gear while the kickstand is down. A faulty switch (or loose kickstand) may open the electrical circuit shutting off the engine.
 
hmmm might be. But this basically happens with almost all motorcycle and specially in winter season. May be the reason is related to heat in cylinder.. Why do we apply choke? To inject high proportion of charge in it. But after than what? So is there any relation between clutch and fuel supply?
 
jack001 said:
Why do we apply choke?

During cold starting, additional fuel is necessary to compensate for the large proportion of fuel which is not able to atomize and therefore will not remain suspended in the cold slow moving air stream when the engine is being cranked. This fuel spreads around the cold intake walls, collects together and form large liquid droplets unsuitable for efficient burning.

The choke improves atomization by increasing the air stream velocity and the increased depression forces more fuel to mix with the air which compensates for the leaner mixture created by the «lost» fuel on the intake walls. Once the engine is hot, the fuel droplets on the intake walls tend to vaporize, hence going back into the air stream.

jack001 said:
So is there any relation between clutch and fuel supply?

Not that I can't think of. It is more of a proper matching of engine and transmission RPM and, preferably, keep a constant engine power during the shifting process.
 
ok thanks buddy.. & can you explain me six stroke engine? Just give me line diagram of engine. That would be enough for me to understand.
 
http://en.wikipedia.org/wiki/Six-stroke_engine"
 
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