Toyota gets Japanese approval for PHEV Prius road tests
Even though Toyota has been unenthusiastic about efforts by American owners to convert Priuses to plug-in capability, they have been working on PHEVs internally. They've now received approval from the Japanese Ministry of Land, Infrastructure and Transport to road test their plug-in hybrid (previous post). The new vehicle has an on-board charging system that allows drivers to plug-in to a standard household outlet to charge the battery. Interestingly, unlike the conversions being done by companies like HyMotion, Toyota has chosen not to use a lithium ion battery pack. Instead they are sticking with NiMH but with a higher capacity than than the standard units used in other hybrids. On the Japanese 10-15 test cycle the PHEV Prius has an electric range of about 8 miles. Toyota will be testing eight examples of the PHEV Prius and providing data back to the government that can be used to update test methods for efficiency and emissions tests. Two of the plug-in hybrids will also be coming to the US for use at the Advanced Power and Energy Program at the University of California, Irvine and the Institute of Transportation Studies at the University of California, Berkeley.
[Source: Toyota]
July 25, 2007 – Torrance, CA - Toyota Motor Sales, U.S.A., Inc., (TMS) today announced that it will provide Toyota plug-in (PHEV) hybrid prototypes to the Advanced Power and Energy Program at the University of California, Irvine (UCI) and the Institute of Transportation Studies at the University of California, Berkeley (UCB), as part of its on-going sustainable mobility development program with the two UC campuses. Also, today, Toyota Motor Corporation (TMC) announced that the Japan Ministry of Land, Infrastructure, and Transport has certified prototype plug-in hybrid vehicles for use of similar testing on Japan public roads.
Toyota has a long history of working collaboratively with both universities on the development of advanced technology and alternative-fuel vehicles, including demonstration and research programs involving fuel cell vehicles, gas-electric hybrids and pure electric vehicles. This next phase of its sustainable mobility partnership involving plug-in hybrid vehicles will be conducted in conjunction with the Alternative Fuel Incentive Program jointly developed by the California Air Resources Board (CARB) and the California Energy Commission (CEC). The goal of this program, which was authorized under California Assembly Bill 1811, is to incentivize the use and production of alternative fuels and vehicles.
"Our goal with this program is to evaluate various advanced vehicle technologies, as well as key factors such as infrastructure, intelligent transportation systems, and urban design," says Dave Illingworth, senior vice president and chief planning officer for TMS. "The Toyota Prius convinced mainstream consumers on the merits of hybrids. Although there is much work to be done with plug-ins, we see this pilot program as a significant step in the advancement of the technology."
A conventional gas-electric full hybrid system, such as that found in the Toyota Prius, is powered by both an electric motor and a gas engine. The system operates in pure-electric mode, pure-gas mode, or a combined gas-electric mode. The electric motor is powered by a dedicated battery pack that is kept charged by electricity generated by the gas engine and the vehicle's re-generative braking system. The fact that the hybrid battery never needs to be plugged-in to a recharging station has been one of the primary selling points with mainstream consumers.
Based on the current-generation Prius, the PHEV prototypes will be powered by oversized packs of nickel-metal hydride batteries that effectively simulate the level of performance Toyota expects to achieve when it eventually develops its own more advanced, compact and powerful battery systems.
The prototype PHEV system is designed to operate in a similar manner to the current Prius, switching from pure-electric mode, to gas-engine mode to a combined gas-electric mode. The big advantage is that the PHEV's prototype battery pack is capable of storing significantly higher levels of electricity, supplied by "plugging into the grid" for periodic recharging sessions. With significantly more electric power in reserve, the vehicle will be capable of operating in pure-electric mode for longer periods of time and at much higher speeds than the current Prius. This will result in substantial gains in fuel economy and a major reduction in total tailpipe emissions of smog-forming gases, over current conventional hybrid systems.
Given its commercial success, it's no surprise that the further advancement of hybrid technology is a top priority for Toyota. As of the end of May 2007, cumulative sales of Toyota hybrid vehicles worldwide topped the one million mark, a global sales number the company hopes to hit annually in the early 2010s.
The U.S. market accounts for more than half of Toyota's first million hybrid sales-604,693 vehicles from the first Prius sold in 2000 through June 2007. And despite decreasing tax credits, demand continues to climb.
An analysis by The Detroit News showed Toyota accounted for 80 percent of the U.S. hybrid market in May, a month that saw TMS' hybrid sales jump more than 100 percent over the previous May. The company's hybrid sales for the first six months of 2007 are up 69 percent over the same period last year.
"The cost-benefit of hybrids is becoming more apparent with climbing gas prices," says Jim Lentz, TMS executive vice president. "We anticipate combined sales of Toyota and Lexus hybrids in the United States to reach a quarter million units this year."
The price of gas isn't the only reason people purchase hybrids; many are concerned about reducing dependence on foreign oil and tailpipe emissions. A recent study by the National Renewable Energy Laboratory says hybrids have saved close to 215 million gallons of fuel in the United States since their introduction in 1999.
Additionally, Toyota estimates that over the past decade, hybrids worldwide have emitted approximately 3.5 million fewer tons of CO2 than gas-powered vehicles of the same class.
Reader Comments (Page 1 of 1)
James Bowe 9:23AM (5/30/2008)
Love the Prius, but comon. 15km? Give me a break. If you live that close to work, ride your bike. I ride 4 miles each way every day, and it's the best part of my day, even when the weather sucks. I think the Volt's 40 miles is weak, 9 is just a waste of engineering time. @philmcneal it's great that you're a super hyper-miler, it sure adds a little fun to your daily commute. But toyota's not trying to save gas, they're trying to sell cars, and 99.9% of the buying public doesn't even know what hyper-miling is, and wouldn't have the patience to listen to your explanation of it, let alone your instructions on how to do it. Look at apples success. They give us cool/simple products. Same goes here, the KISS principle at work.
Reply
Kevin Nugent 9:17PM (5/30/2008)
Yeah yeah , but once again they are sticking with those damb nimh battery packs i cannot stand them !!> Why don't they support the lithium ion revolution as many have been trying to instill in hybrid for decades. If toyota bough packs from a123 systems can you imagine the engineering possibilities of that company could be . The more companies make the more money they can afford to invest into tehir product and make it better , but with very little customers the chance of tech price coming down is slim and it will not advance as fast
Reply
Kardax 6:21PM (7/25/2007)
I think 8 miles is probably enough range to sell tons of these. Salespeople will be able to pitch it as still having usability even in an oil shortage.
The GM Volt is described as having a 40 mile electric range, but will almost certainly cost more money. It'll be interesting to see these two cars duke it out in the market.
Reply
Tony Belding 7:51PM (7/25/2007)
I'd question the benefits of an 8-mile PHEV. I think if it's less than 20 then you begin to degrade the concept of a PHEV, which is to drive most of the time on battery power.
Reply
philmcneal 9:32PM (7/25/2007)
8 miles is awesome (15 km?) you only need around 5 km to reach operating temperature (1 km if you have engine block heater), even if the gas engine comes on you can program your own foot to run the engine in its efficent rpm band (1500 rpm for me on flats, 1750 on incline, and 2300 rpm for "redlining") and then use the rest of the juice to propel the car without burning any more gas but instead burning it off the battery pack/electric grid/solar.
when the car has full State of Charge (80%) the car really feels peppy, like a huge turbo upgrade. This is where 5 kilowatts (20 horsepower) really helps since the electric motor provides insta torque. And being able to recharge from the grid doesn't force the gas engine to go through any engine > inverter > battery pack conversion losses and instead focusing all its energy towards the wheels.
Also blended gas-electric mode stresses out the battery less, I just hope they include the EV mode button so we can control when the engine should come on.
High hopes! I really hope they offer an upgrade to 04 users and above (since the classic models don't have the inverter upgrade that the current prius models have (300 volts vs 500 volts)
Reply
Joseph 11:58PM (7/25/2007)
Watching what the car companies do is like watching a really long movie!
Reply
Joseph 11:59PM (7/25/2007)
If you read the pres release from Toyota is says that the max. speed in electric mode is about 60 mph!
Reply
Chris M 4:05PM (7/29/2007)
It was mentioned on PlugInAmerica.com, and they had links to the official Toyota press release:
http://www.toyota.co.jp/en/news/07/0725.html
and video:
http://www.toyota.co.jp/en/tech/environment/phv/conference/driving_300k.asx
The details in the press release indicate that the prototype plugin doubled the standard Prius NiMH battery pack for an EV range of about 15 Km, increased the electric motor power and torque and changed the gear ratios in the power split device to increase the EV speed to 100 Km/hr. It is not yet known whether the production version will use NiMH or some other battery type, it is possible they may first offer a NiMH plug-in, then later offer a LiIon version.
They also plan road tests in the US and Europe. Looks like Toyota will beat GM once again.
Reply