변속기 오일 교환 수리 사례

2026. 8. 14. 작업

난이도 & 준비물

증상

I was wondering about this the other day. Is the petrol usage in the car only influenced by the position of the gas pedal? So for example if I take my foot of the gas and coast for 30 seconds, would that be the same petrol consumption as sitting idle in traffic for 30 seconds? Or if If I'm driving through a slow zone with the gas pedal 30% depressed, over a minute would that be the same gas consumption as driving on a motor way in top gear with the gas pedal at 30% depressed? Do slopes / hills have an influence? Assuming I'm driving up a slope in a high gear with the gas pedal in a constant po

처리 내용

Lots of things influence fuel consumption, actual pedal position being probably the strongest. The engine's rotational speed has SOME influence, but not nearly as much as pedal position... and a lot of the reason that the engine's speed has influence is because ignition timing will be different at different engine speeds (among other secondary influences), and ignition timing also influences fuel consumption. Coasting, with the transmission shifted to neutral is exactly equivalent - in terms of fuel volume per unit time - to idling. Coasting with the transmission engaged is less efficient than idling because of compression braking. Slopes DO have some minor influence, because slopes alter engine speed (engine speed falls on upslopes, rises on downslopes), but GENERALLY if you hold the pedal exactly fixed (or just use a once-common accelerator lock) fuel consumption on downslopes should be very similar to fuel consumption on upslopes. Too, fuel pressure falls off slightly on upslopes, a