Mr Kilmer is person non-grata here and thus links to his video has been removed.
Why? I think he is the perfect justification for ignoring people who criticize hybrids while refusing to even try to understand how they work.
I always thought he seemed to know what he is talking about, no big deal though thanks for explaining.
If he does, he is deliberately misrepresenting it. If he doesn't, he is the idiot he appears to be.
Best advice is to completely block him
But he is soooo
amusing. Especially those glasses that make you wonder what he has been smoking.
I really don't need more evidence than this, which I hope doesn't get removed by TheDarkKnight:
This isn't a Prius. The Prius use(s) Atkinson Cycle engines, which (are) small four-cylinder gas engines that don't have cams in them. It's an old design that kind of failed because they work fine but they don't put out enough horsepower. But since they want the biggest gas mileage they can in the Prius they use an Atkinson motor. But this engine, it's just a conventional Toyota four-cylinder engine it's not an Atkinson cycle. It's a normal engine.
For the record, the engines Toyota uses in all of their hybrids are their "normal engines," modified to use the Atkinson cycle. The 1.8L engine in the current Prius is the same 1.8L engine that is in the current Corolla, modified to use the Atkinson Cycle. Which means it uses different cams. It has cams.
Note how Scotty, who claims to be an expert mechanic, says they "don't have cams." I don't know for sure, but they probably have "DOHC" imprinted on them somewhere. It means "Dual Over-Head Cams." But even if they don't, "DOHC" is clearly listed in any spec sheet. And clearly evident to any mechanic who (A) knows what a cam is, (B) has looked at the engine, and (C) isn't lying through his teeth. One has to wonder which of these statements does not apply to Scotty in this video.
To be complete, the 2.5L engine in the car Scotty is pointing to is a modified version of the 2.5L DOHC engine in the same-year gas-only Camry. It is also modified to use the Atkinson Cycle.
James Atkinson was an inventor of internal combustion engines. He pioneered the idea that it was more efficient for the expansion stroke to be longer than the compression stroke. But he tried to do it by altering the movement of the piston:
This is called the "Atkinson cycle-engine." The point of emphasis is that its mechanical cycle is different than what Otto used, and was quite complicated. The engine failed because that mechanical cycle was unreliable, as you might well imagine.
In modern times, we have better control over the valves. We accomplish what Atkinson wanted by simply closing the intake valves late in the cycle. This is called an "Atkinson-cycle engine." The point of emphasis here is that the power cycle it implements is what Atkinson wanted, rather than the mechanical cycle.
The effect of using the Atkinson-cycle is to (A) reduce power, because less fuel is used in each cycle, (B) make the range of rpms where it works well narrower, but (C) increase efficiency at certain levels of power. This is perfect for a hybrid, since (A) the electric motor can add power back in, (B) the car's speed is not tied as directly to rpms, and (C) it has a battery to buffer the power when the needs of the car differ from the optimum power.