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View Poll Results: Which uses more fuel? | |||
Engine braking |
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7 | 41.18% |
clutch in and use brakes |
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10 | 58.82% |
Voters: 17. You may not vote on this poll |
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#11 |
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some mixed answers!
I should add its not about me penny pinching, not fussed about that at all. i was just wondering from a engineering/science point of view. |
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#12 |
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The answer is a massive "it depends"
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#13 |
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yeah i thought it might, the vehicles we were originally talking about were a 2.5TD L200 and a 2.2 petrol (carbed) Hilux.
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#14 |
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Well a standard (not common rail) diesel has fuel flow proportional to engine speed and throttle position. So not much difference.
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#15 |
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#16 |
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Who's got that .gif of him with the lightbulb on his head?!?
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#17 |
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Its a sort of automatic pilot that drives your vehicle around without using any fuel.
We should market it really.
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#18 |
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As said, when an engine is idling, its still using a lot of fuel to turn the engine over.
When using engine braking, the momentum is still turning the engine and not forcing any fuel in. Our VXR does 0.2mpg when on idle, but you leave it in 6th and slow down it'll ratain max of 999.99 (therotically, no fuel used at all). |
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#19 |
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I thought that the engine braking causes the vacumn to build up massively, reducing the amount of pressure within the fuel pressure regulator. I thought this was how it worked on injected petrol engines anyway. Obviously the injectors will have different control logic but i dunno...
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#20 |
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Depends if it's a 2port reg or 3port ... compensated or not... (obv a 3port won't be compensated...) Basically ECU logic can cut fuel flow entirely on the overrun if programmed to do that.
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