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Hybrid Vehicles Hybrid Vehicles - Archived Discussions Toyota Prius vs. Honda Civic Hybrid v. Honda Insight v. ? 
336 messages, Last post on Oct 26, 2007 at 11:07 AM
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Replying to: railroadjames (Sep 25, 2005 3:41 pm) They did sell more in August than for quite a while. I think it is the ideal commuter car. PS I don't think they can justify spending money on changes selling 55 units per month. |
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Replying to: railroadjames (Sep 25, 2005 3:41 pm) Honda only built 150 of the 2005 for the United States. They clearly aren't interested in greater sales. It's basically just a collector's item in the making... which actually isn't too bad of a thing. Automotive history is loaded with extremely limited quantity vehicles that are now prized items by the few that own them. JOHN |
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I think the Honda just might be more efficient in the real world. The current 5 speed matches the CVT Prius, but the auto gives up a couple of mpg. But the new one gains some efficiency, and Honda is closer to the EPA numbers than Toyota has been. So it'll be very close. -juice |
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Replying to: stevedebi (Sep 12, 2005 10:39 am) "The HSD doesn't have gears, so there is no way to put in a manual transmission without completely redesigning the system. " Well, actually it does have gears: sun, ring, and planetary gears. But the design of the system does eliminate the need for a conventional; automatic or manual transmission. so in effect you answer is correct "...The HSD doesn't have gears, so there is no way to put in a manual transmission without completely redesigning the system. " but sadly I already knew that and was lamenting that fact. YMMV 6-speed, MidCow
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Replying to: midnightcowboy (Sep 29, 2005 1:01 pm) Those are just power carriers, not gears, serving the same purpose as the connectors in a differential. It is not a transmission, since nothing ever disengages or even shifts. They just spin. What would having gears accomplish? You already have the ability to "downshift", kicking in a boost from the motor and/or gas engine (determined by what was powering the tires in the first place) when you step harder on the pedal. JOHN |
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Replying to: john1701a (Sep 29, 2005 3:01 pm) As a seasoned Prius owner i thougth you knew how the CVT planetary gear system worked. Here is a technical slide presentation that in session 2 shows the details of the Prius HSD system. Look at slide 28 in particular. It shows a picture of the actual Prius gears: sun ,planetary and ring. Here is the URL : http://www.engin.umd.umich.edu/vi/w4_workshops/Miller_W04.pdf The gear system acts as a transmission by combining the outputs of two Motor /Generators MG1 and MG2 with the drive to the wheels. The "power carrier" is just a name Toyota coined to try to explain the system to the non-engineering background, general public. I will state correctly again the HSD system uses gears! YMMV, MidCow |
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Replying to: midnightcowboy (Sep 29, 2005 5:30 pm) How come that isn't called a transmission? How come the components inside it aren't called gears? How come nothing ever engages & disengages? What is the point giving the same name for a device that is completely unlike any other? JOHN
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Replying to: midnightcowboy (Sep 29, 2005 5:30 pm) It is "PSD", which stands for Power Split Device. JOHN
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Replying to: john1701a (Sep 30, 2005 4:54 am) Look at this URL on the bottom of page101 and top of page 102: "In a series/parallel hybrid (such as the Prius), a power splitting device divides the power from the engine, so the ratio of power going directly to the wheels and to the generator is continuously variable. Since the motor can be run on the electricity as it is generated, the motor is used more than in a parallel system. " ALL series/parallel hybrid systems, example Prius, need a power splitting device, hence the coined name: http://www.homepower.com/files/HP102_100.pdf Have a Good Day, MidCow |
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