Originally Posted By: Hokiefyd
Originally Posted By: Artem
There's just no reason to see a V8 truck sipping fuel down the highway with all 8 pistons working generating 300-400tq... towing nothing! could easily get away with 100hp with 3-4 cylinders active, pushing the truck down the freeway while netting 30mpg
Even without cylinder deactivation, a V-8 truck doesn't generate max power just cruising down the highway. In fact, at 5-10% throttle, it's probably only generating 20-50 horsepower. Whether it's a hybrid or not, X amount of power is required to push N pounds with a K cross section through the air at M speed.
Alright... let me try that again...
Even at part throttle, it's still 8 cylinders working when it could easily get away with 4 (even if you have to give more gas to make the same amount of power, it's still more efficient)
A Ton of energy is wasted during the combustion process (which we know is very inefficient and only like 20% of the energy is used to turn the wheels) so it's better for 4 cylinders to do the work vs 8 tiny explosions going on)
That's why Honda is doing it. It might only be worth a few MPGs but for cars to be truly efficient, ALL the technology has to be implemented into each engine in order to squeeze out every drop of energy and waste as little as possible.