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Joined 2 years ago
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Cake day: June 15th, 2023

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  • The turbo does indeed increase exhaust pressure, and therefore extracts some work from the crank but it’s extracting significantly more from the high pressure of the expanded hot gas.

    I’ll admit I’m at the edge of my knowledge here, but are you saying that if we were increasing the pressure in the cylinder from, say pure nitrogen (or another inert), instead of atmosphere (which contains oxygen), and we kept the same amount of fuel from natural aspiration, we’re still get the majority of the benefit of turbocharging even overcoming the parasitic portion of extra energy needed during the compression cycle and the exhaust cycle against the turbocharger impeller?




  • Your explanation about where the energy comes from with turbochargers sounds wrong to me.

    When exhaust gas passes through a turbocharger,

    You’re skipping a crucial step here. The exhaust gases get pushed through input of the exhaust gas impeller on the turbocharger by the movement of a piston in the engine during the exhaust cycle. This “work” isn’t free. Its energy that comes from the other pistons on their combustion cycle. If there is more resistance on the exhaust coming out of the engine (which there is to drive the turbocharger impeller), that energy must be added (robbed) by the energy at the crankshaft that ultimately powers the wheels.

    The extra boost of power we experience in an engine from using a turbocharger is that the turbocharger allows more oxygen to be put into the combustion chambers (and the engine puts more fuel in at the same time). The extra energy is from burning - - more fuel in the same period of time than without turbocharging. The fuel is the source of the energy, the turbocharger isn’t recovering any energy.

    The article is covering technology is actually recovering energy turning heat (thermal energy) back into electricity (electrical energy).


  • Understanding the headline requires prior knowledge of the industry and ARM specifically.

    Even without reading the article, I know that ARM is one of the only CPU companies I know of that designs CPUs but doesn’t actually manufacture any of them for sale themselves. They license their CPU designs to other companies that use them in their own products which is why Apple can make their M silicon ARM CPUS for iOS devices and Qualcomm can their Snapdragon CPUs smartphone CPUs.

    What this article headline is saying that ARM, for the first time, is manufacturing its own CPUs and not just licensing their tech to others to do so. Further, ARM is apparently poaching employees from their licensees that have ARM CPU knowledge to do it.


  • Generally a company doing something bad enough to encourage a large enough boycott to affect the bottom line is making quite a bit of money. They calculate the loss of sales due to the boycott over time and can plot when the value of the bad business is lower than the boycott. Many times they continue with the bad behavior in spite of loss of business from the boycott because the business might be at the edge of viability anyway. So extracting the last bit of value out of the company is a net win before the rotting husk is sold off in pieces for the value of its assets or the brand is sold to the opposing group that actually likes the bad behavior that was being boycotted so it becomes an asset again.












  • Yikes who would downvote this comment? Pretty gross how many people love cars more than humanity and the planet.

    Well, I did, and its not because I love cars and hate humanity/the planet. Its that this is such an irrelevant comment on the topic and is just looking to derail and invite argument that you yourself are perpetuating with your Strawman you posted here. I don’t downvote because I disagree with an opinion. I downvote when the posts are actively working against topical conversation to the thread.

    That poster did the equivalent of going into a thread about threats to livestock and said “everyone should be a vegan”.

    Oh, I downvoted you too, BTW.