Dash Pot?
Jun 25, 2013 | 10:21 AM
#2
Registered User
Joined: Oct 2011
Posts: 2,707
Likes: 335
From: Denver CO
Well since you didn't ask for what on what why or anything else here is a link to Wikipedia
https://en.wikipedia.org/wiki/Dashpot
https://en.wikipedia.org/wiki/Dashpot
Jun 25, 2013 | 04:38 PM
#3
Registered User
Joined: Sep 2007
Posts: 8,379
Likes: 871
From: San Francisco East Bay
The injectors spray liquid gasoline, but the engine uses only gasoline vapor. A small amount of the sprayed gasoline clings to the inside of the intake manifold, but at steady state (driving down the road), that gasoline is evaporating as fast as it is getting replaced.
To go from idle to steadily running, it has to build up that thin layer of liquid gas. On a carbureted engine, you have an "accelerator pump." On a fuel injected engine, the injectors stay open a hair longer when the throttle opens.
But what happens when you slam the throttle closed? Not much air, but a bunch of liquid gas evaporating into the intake stream. So the mixture goes very rich, back fires through the exhaust, and ruins the air we breath. So all engines (carbureted or injected) have something to keep the throttle from slamming shut.
If you lose the dashpot, whenever you jump off the throttle you'll dump a bunch of unburned fuel into the exhaust, which isn't good for anything. You can get around it by always closing the throttle gently, but why worry about that when a little gadget will do it for you?
Yes, it's important. Now you know why.
To go from idle to steadily running, it has to build up that thin layer of liquid gas. On a carbureted engine, you have an "accelerator pump." On a fuel injected engine, the injectors stay open a hair longer when the throttle opens.
But what happens when you slam the throttle closed? Not much air, but a bunch of liquid gas evaporating into the intake stream. So the mixture goes very rich, back fires through the exhaust, and ruins the air we breath. So all engines (carbureted or injected) have something to keep the throttle from slamming shut.
If you lose the dashpot, whenever you jump off the throttle you'll dump a bunch of unburned fuel into the exhaust, which isn't good for anything. You can get around it by always closing the throttle gently, but why worry about that when a little gadget will do it for you?
Yes, it's important. Now you know why.
Oct 4, 2013 | 07:33 AM
#4
Registered User
Joined: Sep 2013
Posts: 1,631
Likes: 110
The injectors spray liquid gasoline, but the engine uses only gasoline vapor. A small amount of the sprayed gasoline clings to the inside of the intake manifold, but at steady state (driving down the road), that gasoline is evaporating as fast as it is getting replaced.
To go from idle to steadily running, it has to build up that thin layer of liquid gas. On a carbureted engine, you have an "accelerator pump." On a fuel injected engine, the injectors stay open a hair longer when the throttle opens.
But what happens when you slam the throttle closed? Not much air, but a bunch of liquid gas evaporating into the intake stream. So the mixture goes very rich, back fires through the exhaust, and ruins the air we breath. So all engines (carbureted or injected) have something to keep the throttle from slamming shut.
If you lose the dashpot, whenever you jump off the throttle you'll dump a bunch of unburned fuel into the exhaust, which isn't good for anything. You can get around it by always closing the throttle gently, but why worry about that when a little gadget will do it for you?
Yes, it's important. Now you know why.
To go from idle to steadily running, it has to build up that thin layer of liquid gas. On a carbureted engine, you have an "accelerator pump." On a fuel injected engine, the injectors stay open a hair longer when the throttle opens.
But what happens when you slam the throttle closed? Not much air, but a bunch of liquid gas evaporating into the intake stream. So the mixture goes very rich, back fires through the exhaust, and ruins the air we breath. So all engines (carbureted or injected) have something to keep the throttle from slamming shut.
If you lose the dashpot, whenever you jump off the throttle you'll dump a bunch of unburned fuel into the exhaust, which isn't good for anything. You can get around it by always closing the throttle gently, but why worry about that when a little gadget will do it for you?
Yes, it's important. Now you know why.
Oct 4, 2013 | 01:17 PM
#6
Registered User
Joined: Sep 2013
Posts: 1,631
Likes: 110
Did you read this?
The injectors spray liquid gasoline, but the engine uses only gasoline vapor. A small amount of the sprayed gasoline clings to the inside of the intake manifold, but at steady state (driving down the road), that gasoline is evaporating as fast as it is getting replaced.
To go from idle to steadily running, it has to build up that thin layer of liquid gas. On a carbureted engine, you have an "accelerator pump." On a fuel injected engine, the injectors stay open a hair longer when the throttle opens.
But what happens when you slam the throttle closed? Not much air, but a bunch of liquid gas evaporating into the intake stream. So the mixture goes very rich, back fires through the exhaust, and ruins the air we breath. So all engines (carbureted or injected) have something to keep the throttle from slamming shut.
If you lose the dashpot, whenever you jump off the throttle you'll dump a bunch of unburned fuel into the exhaust, which isn't good for anything. You can get around it by always closing the throttle gently, but why worry about that when a little gadget will do it for you?
Yes, it's important. Now you know why.
To go from idle to steadily running, it has to build up that thin layer of liquid gas. On a carbureted engine, you have an "accelerator pump." On a fuel injected engine, the injectors stay open a hair longer when the throttle opens.
But what happens when you slam the throttle closed? Not much air, but a bunch of liquid gas evaporating into the intake stream. So the mixture goes very rich, back fires through the exhaust, and ruins the air we breath. So all engines (carbureted or injected) have something to keep the throttle from slamming shut.
If you lose the dashpot, whenever you jump off the throttle you'll dump a bunch of unburned fuel into the exhaust, which isn't good for anything. You can get around it by always closing the throttle gently, but why worry about that when a little gadget will do it for you?
Yes, it's important. Now you know why.
Oct 4, 2013 | 11:32 PM
#7
Registered User
Joined: Mar 2013
Posts: 1,047
Likes: 1
From: Central TX
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