va salut cu respect
intamplator am gasit acest articol despre cum sa conduci economic un motor vvt si m-i s-a parut interesant;
imi cer scuze ca-l postez in engleza (nu am vrut sa-i alterez continutul prin traducere) si va multumesc pt intelegere;
"As my test has shown, by using VVT-i correctly, the driver could save up to 30% fuel compared to non VVT-i engine! However using VVT-i incorrectly could waste 30% of fuel compared to non VVT-i engine.
First thing is you will need to study your engine's characteristic. Usually VVT-i engine will change its timing between low engine speed and high engine speed at around 3000 RPM. Try to find the difference between low speed timing and high speed timing. Usually you will feel that the car's acceleration goes faster at that RPM.
You will then need to check the lowest RPM that your engine can work to move your car on straight and level road. Check it on each gear. Usually it will be near 2000 RPM. This is where VVT-i plays, it could deliver 90% of its torque from RPM as low as 2000.
Then you will need to change your driving habit. To drive quickly you will need to press the throttle quickly but then shift up just under the engine's timing change RPM. So, if your engine's timing change RPM is at 3000, you will need to shift at 2950. Usually the engine and transmission is designed to work together so the RPM could drop to just above the lowest RPM to move the car comfortably (e.g. from 2950 to 1900).
This will preserve the car's swiftness and safe some fuel. Contrary to popular believe to press the throttle softly to higher RPM (3500 - 4000 RPM), my theory says that we should press the throttle quickly to low RPM. This comes from of high school physic theory:
E=P*T or Energy = Power * Time or watt (horse power) * second
The higher the RPM the more horse power your engine deliver. The longer you stay at high RPM the more energy you waste.
The quicker you press the throttle the quicker you reach desired RPM and this results in quicker you shift to the next gear. This will reduce the time required to reach the desired speed, so the 'T' variable will be small. Then by using lower RPM means lower average power output from the engine, therefore reducing the 'P' variable. With 'P' and 'T' small the 'E' will be small as well, while 'E' is the factor that directly related to fuel consumption."
ce parere aveti ? a incercat cineva asta pana acum ? eu personal chiar sunt curios sa incerc; actualmente pe trafic urban in Timisoara am un consum de 9,5 - 10,5 l/100 km
p.s. in conceptia mea economie inseamna sa nu faci risipa, respectiv sa reduci cat mai mult consumul inutil
intamplator am gasit acest articol despre cum sa conduci economic un motor vvt si m-i s-a parut interesant;
imi cer scuze ca-l postez in engleza (nu am vrut sa-i alterez continutul prin traducere) si va multumesc pt intelegere;
"As my test has shown, by using VVT-i correctly, the driver could save up to 30% fuel compared to non VVT-i engine! However using VVT-i incorrectly could waste 30% of fuel compared to non VVT-i engine.
First thing is you will need to study your engine's characteristic. Usually VVT-i engine will change its timing between low engine speed and high engine speed at around 3000 RPM. Try to find the difference between low speed timing and high speed timing. Usually you will feel that the car's acceleration goes faster at that RPM.
You will then need to check the lowest RPM that your engine can work to move your car on straight and level road. Check it on each gear. Usually it will be near 2000 RPM. This is where VVT-i plays, it could deliver 90% of its torque from RPM as low as 2000.
Then you will need to change your driving habit. To drive quickly you will need to press the throttle quickly but then shift up just under the engine's timing change RPM. So, if your engine's timing change RPM is at 3000, you will need to shift at 2950. Usually the engine and transmission is designed to work together so the RPM could drop to just above the lowest RPM to move the car comfortably (e.g. from 2950 to 1900).
This will preserve the car's swiftness and safe some fuel. Contrary to popular believe to press the throttle softly to higher RPM (3500 - 4000 RPM), my theory says that we should press the throttle quickly to low RPM. This comes from of high school physic theory:
E=P*T or Energy = Power * Time or watt (horse power) * second
The higher the RPM the more horse power your engine deliver. The longer you stay at high RPM the more energy you waste.
The quicker you press the throttle the quicker you reach desired RPM and this results in quicker you shift to the next gear. This will reduce the time required to reach the desired speed, so the 'T' variable will be small. Then by using lower RPM means lower average power output from the engine, therefore reducing the 'P' variable. With 'P' and 'T' small the 'E' will be small as well, while 'E' is the factor that directly related to fuel consumption."
ce parere aveti ? a incercat cineva asta pana acum ? eu personal chiar sunt curios sa incerc; actualmente pe trafic urban in Timisoara am un consum de 9,5 - 10,5 l/100 km
p.s. in conceptia mea economie inseamna sa nu faci risipa, respectiv sa reduci cat mai mult consumul inutil
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