GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||||
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08:28 Dec 3, 2017 |
English language (monolingual) [PRO] Tech/Engineering - Transport / Transportation / Shipping / outboards | |||||||
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| Selected response from: Charles Davis Spain Local time: 21:17 | ||||||
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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4 +10 | choke = valve that reduces air flow to warm a cold engine / throttle = accelerator |
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Discussion entries: 3 | |
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choke = valve that reduces air flow to warm a cold engine / throttle = accelerator Explanation: I can remember the days when cars had a manual choke. It was a knob on the dashboard and on cold mornings, when it was difficult to start the engine, you pulled it out. It operated a choke valve, which is a valve that has the effect of warming up a cold engine more quickly by increasing the proportion of fuel in the air/fuel mixture reaching the cylinders. It does this simply by restricting the air flow and therefore reducing the proportion of air in the mixture. So the mixture burns hotter and the engine runs faster. https://en.wikipedia.org/wiki/Choke_valve The throttle is another name for the accelerator. It regulates combustion by regulating the amount of either air or fuel in the mixture, depending on the type of engine. In a petrol engine it's usually the amount of air. As with the choke valve, when the amount of air is reduced, combustion is increased and more power is produced. The main difference, apart from the fact that the throttle sometimes uses other ways of achieving the same result, is that the choke is engaged and left at a particular level, raising the richness of the mix by a fixed amount, and is used to warm the engine when it is cold, whereas the throttle allows the driver to constantly vary the fuel/air mixture and therefore the power, and is used to control speed. |
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