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danwat1234
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And, I'm right. No mention of a turbo on the 2016 Prius. A 1.8 liter tweaked Atkinson cycle still. 54 city, 50 highway on the 2016 regular Prius. Not much of a highway improvement at all! But 58 city, 53 highway for the 'eco' model of the regular Prius, which I think has no rear wiper. But hard to say it improved the highway that much. https://www.youtube.com/watch?v=SHWHx-BxNx8&feature=youtu.be
The 2016 Prius will be revealed on September 8th 2015, I bet it'll have something close to concept#1.
Now if only it would be available for the US. But a far cheaper solution is to just hook up a 1,000 watt 12vDC to 120VAC inverter to the 12V accessory lead acid battery and leave the car on so it'll keep the lead acid battery charged via the traction battery, and be able to power 1,000 watts of devices, maybe a bit more. I am not sure of the capacity of the DC-DC converter. With this setup you just pay for the cost of the inverter, maybe $150 or less depending on whether you want new or used, modified or pure sine wave. The downside is it only handles 1,000 watts or so instead othe 6,000 watts of the 'leaf to home' system. I hope something similar becomes available (3rd party) for the Volt! Huge generator in that with nice catalytic converters.
800 wh per kilogram? That is a lot better than a Chevy Volt which is more like 80 wh per kilogram, since the battery pack weighs about 500 pounds and stores about 16KWH (about 45% a gallon of gas equivalent) of electricity. Of course the battery cells themselves are slightly more energy dense because some weight is involved in the battery pack for thermal management, sensors, crash protection.
Somehow I don't think HCCI will ever come to be. Atkinson cycle for GM cars would be a good first step (like Toyota has been doing for 12 years!). Putting in a regular 3 cylinder OTTO cycle engine for the range extender the the 2nd generation Volt is not exciting at all.
I really wish the Volt (or Cadillac ELR at least) would have a multilink (Mcpherson or wishbone) rear suspension rather than torsion beam rear end. For $60,000, it really should!! Cheap cars have a torsion beam rear end, but any reasonable car like a Civic has multilink. It has limitations on handling on uneven terrain. Hardly any camber or toe changes are allowed with this suspension design. Also, an Atkinson cycle engine. The 1.4L engine is the same engine as what is in the Cruze, without the turbocharger. Atkinson or lean burn is the way to go.
*I assume that's why cars DON'T -< (typo) have lean burn right now,
Perhaps this is how Toyota plans on using a lean burn engine in a future Prius. ~45% engine efficiency here we come. I assume that's why cars have lean burn right now, because of emissions. But then there are also patents that get in the way of innovation.
Lean burn engine for concept#2. Sounds awesome, like the 5th gen Civic VX and 6th gen Civic HX and 1st gen Honda Insight except better! But, how will they manage to keep the car SULEV emissions rated? Some very special catalytic converters, wide band o2 sensors.. For instance with the 2000-2006 Insight hybrid, the manual transmission version had the lean burn and was ULEV rated, the CVT version was SULEV rated because it had a non-lean burn engine. In Japan the CVT still had lean-burn but that's not the USA. If they can keep the emissions in tune, and make the emissions system reliable (expensive to repair!), It'll be a winner, and hypermilers will put in scangauges to try to extend lean burn mode as much as possible. Here's to hoping. It looks like Atkinson + Lean burn + short range plug-in = win. Reliability and manufacturing costs are key
Ultimately I believe HCCI engines will provide even more efficiency and will come with time. HCCI engines with a hybrid or plug-in hybrid powertrain would be perfect.
Hmm, Subaru is supposed to release a Hybrid to the USA market for the 2013 year, so far no word on what it will be, though it will likely be an Impreza. Will it just be a regular boxer engine with a small AC electric motor to provide regenerative braking and acceleration? I hope not. Subaru should have the boxer engine be an Atkinson cycle engine, or Miller cycle (Atkinson with supercharger), to get more MPG out of their engines. Making a mild hybrid by using their regular engines will be a disappointment. But I am glad that they are (Hopefully!) getting into the hybrid game, finally.
Wow, this technology with HCCI is intriguing. A lot of the comments on here give lots of ideas on how to make an HCCI engine. It is now over half-way through 2012, and no HCCI engines in sight. Lots of manufactures have Direct Injected OTTO cycle engines, and a lot of hybrids available that have atkinson-cycle engines. Toyota's 3rd generation Prius engine is ~38% efficient, being multi-port injected and they are aiming for the 4th generation Prius to have an engine that is 42% efficient, via Direct Injection and possible a longer stroke but smaller bore. Used Priuses are getting cheap on craigslist,Hurrah! I hope one day a Prius or other 'regular sized' 4-wheeled hybrid car can achieve 60MPG on the USA EPA highway and city test cycle. This can only be achieved I think with HCCI engines and high-tech steel alloys to save weight, along with aluminum or carbon fiber where it makes sense. In the coming years, engines and engine controls will become more and more complex, along with infotainment, collision avoidance and collision safety equipment. I question the long term reliability maintenance costs of future cars, and whether, despite the great fuel economy of a 2020 Hybrid Prius, would the net maintenance costs still save me money versus just keeping my 1999 Civic for another 20 years and doing the basic maintenance it requires? Chances are I would still save money with the new hybrid, I hope so.
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Aug 8, 2012