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31 Aug 2005, 22:02 (Ref:1395925) | #1 | ||
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Join Date: Aug 2005
Posts: 36
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Fuel consumption on 4 stroke engines
Hi everyone,
I've got a question about four stroke engines. I would like to know how much a cilinder is filled with the fuel/air mixture during the intake stroke. I tried to calculate it but somehow my fuel usage is far to high. I tried the following: 4 stroke 3.0 litre V10 engine 13.5 to 1 air/fuel mixture In a four stroke engine all cilinders have 1 intake-stroke every 2 rounds, so at 10.000rpm each cilinder has 5.000 intakes per minute. When the full cilinder (for instance 300cc) would be filled in an intake-stroke there would be 5.000 intakes x 300cc x 10cylinders = 15.000 litres of air/fuel mixture going in and out of the engine. at a 13.5 to 1 air/fuel ratio that would be 1034 litres of fuel per minute. when you travel about 5km's in a minute that would be a very rich engine of about 200 litres / 1 km instead of a real racing engine around 1 / 1.5. So i guess i'm making a very big mistake, or during the intake a 300cc cylinder will not be filled with 300cc air/fuel mixture of 13.5/1. I guess it is then limited by the amount that can get through the intake valves or/and is blocked by the remaining exhaust. If so is there a way to calculate how much % of fresh fuel and air gets in the cylinder each intake-stroke? Can someone help me out? |
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