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New Speed Record For Hybrid Cars

prostoalex writes "According to CarPages, Toyota Prius set a new world record for hybrid vehicles. It 'set the mark at 130.794 mph on the three-mile short course using a standard Hybrid Synergy Drive power-train - a mixture of 1.5 litre petrol engine and an electric motor.'"

15 of 411 comments (clear)

  1. The FASTEST...erm... by Sensible+Clod · · Score: 5, Informative

    actually, it's the only hybrid ever entered. In fact, they had to convince the people to open a new category in order to allow the vehicle, because it has more than one 'engine'. IIRC, it may also have been because the other 'engine' (elec. motor) doesn't 'use conventional fuel'.

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    1. Re:The FASTEST...erm... by Andy_R · · Score: 4, Informative

      Actually, almost all land speed record breakers in recent years have been dual engine hybrids. The LSR rules require the car to be able to go in reverse, and the common solution to this requirement is to stick a tiny electric motor in somewhere that can strain itself half to death while dragging the car a few inches backwards to fit the rules.

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    2. Re:The FASTEST...erm... by jeif1k · · Score: 3, Informative

      For marketing purposes, the manufacturers lead the public to believe that they derive part of their energy from combustion of petrol and part "from electricity", which is meaningless but impressive to the average consumer, who doesn't stop to ask why, if that is so, he is not having to charge up his car every night.

      Fortunately, most consumers know that the "from electricity" part is far from meaningless. Quite to the contrary: it enables regenerative braking, low-end torque, and instant startup/shutdown.

      Our local newspaper recently published a glowing 'news story' [...]

      Well, so the quality of your local newspaper reporting matches the quality of its readers--readers like you. But just because both you and a reporter got it wrong doesn't mean the rest of the world doesn't understand it.

    3. Re:The FASTEST...erm... by ph43drus · · Score: 5, Informative

      The parent is right that the cars only get their energy from gasoline. However, there is a deeper efficiency story here that just isn't as quick and easy a sound bite as "getting your car's energy from two sources---gas and electricity"---which is an awful marketroid half-truth.

      Anyway, to clarify on hybrids:

      The efficiency story goes like this: your normally car engine sucks as far as efficiency is concerned. This is because they have to operate over a wide range of speed and power requirements. Eg. from just taking off from a dead stop to running up a hill at 70mph or more. A spark engine can get to be about 30% efficient (this is from memory, it might even be up to 40%, I'd have to go look it up, and I'm feeling lazy ;). But anyway, the point is, that because of the requirements put on the spark engine in a car, it has to be designed for maximum power output, and this means for most driving the highest efficiency a car engine can attain is 20% (this would be for a tiny Japanese car which is engineered for fuel efficiency, like a Toyota Tercel or Honda Civic, other cars, like most SUVs, perform worse).

      The trick with the hybrids like the Prius is that they have the battery+electric motor to supplement the gas engine. So, the designers can do something important: they can pick a median power output (much below maximum required power output), and design the spark engine to be maximally efficient for that power output. This allows them to get the 30-40% efficiency out of the gas engine mentioned above. The hybrid only ever runs the gas engine at this power output. If this is too much, the electric motor run the wheels. If this is too little, the motor and the engine drive the wheels. If the batteries are getting low, the gas engine drives the electric motor to charge the batteries. When braking, part of the axel motion is used to drive the electric motor and charge the batteries (reclaiming some of the energy already expended to be reused---this is the regenerative braking that others have mentioned). Note: the designers at Toyota and Honda have taken advantage of the fact that an electric motor and generator are merely the same device, which one it functions as depends on which end the energy comes in, so there is no separate generator. (And if it occurs to you that the clutching system would be complicated because of this, you're right.)

      As far as being able to charge up your hybrid, there are some experimental models with that feature. You might eventually be able to do that; so if you just drive around town, you'd only rarely have to fill your tank (however, this feature requires that the bank of batteries is bigger, and 50% of the electricity in the US comes from coal, so the pollution/energy expenditure could end up being worse off the wall charge, depending on where your power comes from ;).

      Jeff

  2. Not exactly standard... by avalys · · Score: 4, Informative

    This car was not exactly "standard", as the summary claims.

    "An engineering group from Toyota Motorsport in the USA prepared the car by changing the gear ratios (4.32:1 to 3.2:1) and increasing the inverter voltage from 500 to 550 volts. A transmission cooling system was added to decrease the temperature of the inverter and electric motor to maximise efficiency. Ambient temperature on the salt flats was nearly 100 degrees Fahrenheit with nearly 100 degrees humidity. Ice was added between runs to keep the system cool.

    The interior of the car was stripped to save weight, a roll cage added for safety and the whole car lowered by five inches to improve the aerodynamics for this highly specialised record attempt. Even the 26 in front and 25 in rear tyres were made especially by Goodyear."


    With that in mind, hybrids have a long way to go.

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    1. Re:Not exactly standard... by iamhassi · · Score: 4, Informative
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  3. Hybrid technology needed a little redneckization.. by CodeWanker · · Score: 4, Informative

    Let's face it, cool car ideas come from people who love cars the way most /.ers love processor overclocking, water-cooling, and case mods. Convincing a wider audience that tweaking a hybrid will make it jump up and dance is never a bad idea.

    Of course, as a side note, the industry's approach to hybrid autos is flat out wrong. Railroad trains are very efficient, well-proven hybrid designs: their diesel engines are always running at the most efficient level, and their momentum is provided entirely by electric motors. Tres spiffy.

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  4. 2005 Honda Accord Hybrid... by cpenner461 · · Score: 3, Informative

    ...will probably not have a problem meeting or beating this record when it hits the streets. Its got a 255hp V6 that gets 37/29 mpg (highway/city). 2005 Honda Accord Hybrid info

  5. Re:OOOOH WOW by Infinityis · · Score: 5, Informative

    Actually, that myth will likely be futher crushed with the release of a retrofittable hybrid electric vehicle kit, such as the one being developed by Ecolectric Technology (www.ecolectrictechnology.com). Then, you can take any vehicle, retrofit it to be hybrid electric, race it, and claim a new world record. The inherent increase in low-end torque (and thus acceleration) will probably make it as desirable a modification as turbochargers or superchargers on any performance vehicle.

    A hybrid McLaren might be pretty nice if you as me...

  6. National Electric Drag Racing Association by HockeyPuck · · Score: 3, Informative

    You should check these guys out...

    The drag race pure electric cars/motorcycles...

    http://www.nedra.com/

  7. Re:They did cheat a little by stripping it. by Firethorn · · Score: 4, Informative

    No, but a steam powered vehicle did hit 127.66 mph in 1906.

    Besides, Model-T's weren't speed machines, they were consumer machines that opened up the market to sectors who had never before been able to afford a car. A model-T modified for racing could reach 100 mph

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  8. Re:Was the electric motor even used? by Anonymous+Freak · · Score: 3, Informative

    For Honda's hybrid systems, yes.

    For Toyota's, no.

    1. The powertrain is more efficient, and lighter, than a normal cars. (No complex transmission, just a simple Planetary gear.)

    2. I know when I'm going down the freeway, I'm not going a perfectly constant 55 mph, nor am I travelling on a perfectly level road. (Only if your power load NEVER changes does the battery system not matter.) Quite often, I'm running on battery power alone, in fact, even at 60+ mph. (My record is going down a very slight incline, I accelerated from 61 to 63 mph on battery power alone. In my gas-only car, 'coasting' in neutral on the exact same stretch, the car settles at 56 mph.)

    3. The entire 'hybrid' system adds less than 100 pounds of weight to the car, and from what I've read, the simpler transmission and engine (no alternator, no starter) actually saves about 100 pounds, so it ends up even.

    I agree that setting a speed record in a hybrid is silly. But the hybrid components don't cause HARM, either.

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    The purpose of that site was not known.
  9. Re:Many years ago ... by killbill! · · Score: 4, Informative

    If you still think diesels stink, think again. In my country, even BMW sales are over 80% diesel.

    A nice example of modern Diesel engineering is the VW Phaeton V10 Tdi. It has 313 HP and, while officially electronically limited to 250 kph (155 mph), was tested at over 290 kph (180 mph) when it was released one year ago. It does 0-100 kph (0-62 mph) in 6.9 seconds (not too shabby for a 3 metric ton car). And yet, it still gets 27.7 mpg.

    To put it in a nutshell, I don't quite get what this hybrid frenzy is about. Soot emissions used to be a problem, but the latest cars get a soot filter that tackles it. On the other hand, batteries are an additional weight, and once at the end of their lives, are an environmental nightmare.
    Or could it be all about oil companies being too lazy to invest into cleaner gas-oil (like they sell in Europe)?

    If you're an American looking for a new car, I strongly suggest you gave the few imported diesel VWs, Audis or Mercedeses a try before you go the gasoline route.

  10. According to Honda... by scott9676 · · Score: 4, Informative

    My Insight can go 115 mph. And this is stock without being stripped, having a roll cage, or any other modifications.

    It has a 995 cc 3 cylinder gas engine putting out about 63 hp. In series it has a 13 hp electric engine. Because the 2 engines have different hp/rpm curves, it puts out 68 hp. But it only weighs 1850 pounds.

    The car goes 0-60 in 10.5 seconds, has really good handling, and drives kind of like a go kart. The only real bad thing is there isn't much sound insulation, so there is a fair amount of road noise.

    But even going 90 mph, it can still click off about 50 mpg. At 45 mph, you can get it into 'lean burn' mode and get a bit over 100 mpg.

    It's a really good commuter car, has a lifetime mileage of 56 mpg (would be a lot higher if I drove a bit more conservatively and didn't live in a hilly area).

    Also, there are some electric cars that go 0-60 in 3.6 seconds IIRC.

  11. Re:Hate to spoil your fun, but... by ambrosen · · Score: 3, Informative
    Fair point. I drive about 1000 miles per year, fly about 2500 miles per year (with high variance), am a car passenger for about 1500 miles per year, and take the train for about 4000 miles per year. My bike mileage over the past 10 years has varied between about 500 and 4000 miles per year. The figure of 15000 miles per year was an average figure per American I picked up without citation. The figures from North American Transportation Statistics give a total of 6981 billion passenger km travelled in personal vehicles in 2002. For a population of 293 million (CIA world factbook 2004) that gives 23825 km per person per year, or 14891 miles per person. There are 225,936,138 personal vehicles (ibid, different table) (of which c. 130 million are cars and 90 million are light trucks), which travelled 4,241 billion km, or about 11728 miles per vehicle per year, so my figures for mileage per vehicle a a little high, but not drastically so. My figures for personal mileage were right, though. I just didn't figure it'd be that different from vehicle mileage.

    As for the amount of energy to dispose of a car, my previous citation says

    In all cases, they [MacLean and Lave] chose not to analyze environmental impacts from the recycling and disposal stage, because they agreed with earlier studies indicating that the environmental impacts of manufacture and use greatly outweighed those of disposal. They based their analysis on a 1990 Ford Taurus, assuming a vehicle lifetime of approximately 14 years and a fuel efficiency of 21.8 mpg.
    The 120 GJ for manufacture includes all manufacturing costs. I'd say that implictly includes delivery to the customer. In the case of the 800kg car I drive most frequently, it was shipped by sea about 8 or 10 000 miles and then delivered by vehicle transporter about 200 miles. I'd say that's pretty negligible (sea transport uses orders of magnitude less energy per mile than road transport).

    I stand by my original observation that it's wrong to say that it costs more energy to replace a light truck with a hybrid car than it saves in using a hybrid car, but would still point out that that seems to me to be a straw man. In terms of actual choice when replacing a vehicle, then from an energy efficiency point of view, the hybrid wins. Whether it wins as compared to a high efficiency diesel is a moot point. As 9 million cars are replaced each year, along with 8 million trucks (SUVs & minivans are counted in this category), it seems that concentrating on halving the energy emissions of approximately 1/13th of the fleet would make a significant impact, along with encouraging end of life cars to be taken out of the economy slightly faster. When you consider that new cars are likely to be driven much higher mileages, then the figures look better still.

    In short, it's not a magic bullet, but it's a good start.