Bob Lutz has come out and said it again: "I would say there's almost no reasonable doubt in our minds anymore that this is going to work." And that isn't just that the Chevy Volt will work -- it's that it will work on time and as promised. In spite of the difficulties GM has had getting Volt technology up-to-speed within its timeframes, the man upstairs is apparently as confident as ever.
Lutz said that engineers have driven the car to and above its 40-mile pure electric range already. Two companies are still trying to win the lithium-ion battery pack contract, although LG Chem says it has a 3rd-gen unit that's ready to go. Another hurdle is the car's internal combustion range extender starting up, which Lutz described as "noisy and still a little rough."
And of course, it wouldn't be a Lutz piece without him taking a shot at something. Speaking of Toyota's delay in rolling out lithium-ion batteries (although there could be another reason for that), Lutz said Toyota should have faced a bit more scrutiny for that decision. "They told the world that GM was taking a huge risk, that lithium ion batteries were prone to explode and that we were putting our customers at risk and that they would stay with the tried and true. When it comes to Toyota, let me tell you, the press has a short memory." After all of this, if the Volt doesn't show up on time and as promised, GM will need to retool one of its plants to make humble pies.
Bob Lutz has gotten behind the wheel of a Chevy Volt mule, and he seems rather impressed -- both by the performance of its electric drivetrain's instant torque capabilities and the far-reaching impact that the electric vehicle could have on the marketplace. Of course, we are all familiar by now with the wallet-killing gas prices that are commonplace at our nation's stations, and Lutz was struck with just how important the Volt project truly is as he drove around and saw gas hovering around (and over) $4 bucks a gallon.
Although the vehicle that Lutz drove is still very much an engineering mule, the battery pack installed in the electric car was a lithium ion unit which has already been tested in the lab. Apparently, this first test-pack was delivered back in April, which marks a bit of a watershed moment in the development of the Volt. It's way too early in the development of the E-Flex platform to get your checkbooks out, as Lutz clearly states, but actual moving prototypes powered by lithium ion batteries is an important milestone.
According to Bob Lutz, the first Chevy Volt powertrain mule has just passed a major milestone. After several weeks of testing in the lab with a battery pack installed, the Malibu based pre-prototype has rolled out into the fresh air. In fact, according to Lutz, the car has even rolled passed past the security gates of the Milford Proving Ground to drive around on public roads. Even in this early, very rough, form, Lutz says the car is meeting and exceeding the goal of 40 miles of driving without running the engine. With this, the E-Flex engineers have demonstrated the performance viability of this concept. However, they still have a long way to go in validating the robustness of the system in different operating environments as well as the long-term durability of the powertrain as a whole. Perhaps the biggest issue to address is the cost of the system, particularly the battery pack. For GM to sell the Volt at an affordable price at launch, they will likely be taking a significant loss due to the cost of the batteries. When that cost comes down, GM will finally be able to crank up production.
The hopes and dreams of electric car aficionados for a purely battery powered successor to the late, lamented EV1 may soon be satisfied. Or not. It all depends on ... you guessed it, the battery. However, the latest utterings from Maximum Bob have people buzzing again. Mr. Lutz spoke to EV site PetroZero the other day and intimated that a purely battery-powered variant of the upcoming Volt is a possibility, leaving the range extender on the cutting room floor. This is actually not a new idea and dates back to the earliest dates of the Volt program. During a media briefing back in December 2006 several weeks before the Volt's public release, the Volt team showed us images like the one above that included several different powertrain configurations. The premise was to demonstrate the flexibility part of E-Flex. This included a variant with a larger battery and no engine to charge it. This pure EV was described as something that could be built if and when the range and more importantly the cost of the battery reaches a point where it could be successful in the market. Ditching the battery. on the other hand, won't happen because the inefficiencies inherent in transforming from mechanical to electrical to mechanical power without a battery to store regen energy and grid power just wouldn't make sense.
Finally, the PetroZero article indicates that Lutz will be driving the first Volt prototype within the next week. Lutz's use of the word prototype rather than mule led the author to believe this was an actual car with Volt bodywork. We checked with GM's Rob Peterson, who confirmed that such actual prototypes are still many months away and Lutz would actually be driving the Malibu-bodied mule that is now running with a lithium ion pack installed.
Fans of hybrid vehicles have been clamoring for carmakers to add plug-in capability to those models so that they can grab some juice off the grid and leave more in the tank. The problem is that making a useful PHEV is actually not as simple as just plopping in a bigger battery pack and some charging circuitry. Current hybrid models are only designed to run on electricity at light loads and relatively low speeds. At higher speeds or rates of acceleration they operate in a blended mode with both the engine and electric motor running. This of course is still beneficial because it means a smaller less powerful engine is required to meet customer performance expectations while saving gas.
In the real world, PHEVs need more electrical power from the motor in order to actually go farther without starting the engine. A new study done by General Motors using real world data recorded from over 600 cars analyzed how standard and plug-in hybrids would perform in the hands of real drivers. What they found was that to get a real benefit the vehicle needs to be designed to perform at all speeds on electrical power alone. With that much electrical power on board, having a full engine to drive becomes redundant. A small engine to charge the battery however makes sense. An extended range EV (like the Volt) would actually eliminate 70-percent of the engine starts at any time during a drive.
Last Saturday night before the Press Days began for the 2008 edition of the Detroit Auto Show, the 2nd annual GM Style event took place in a huge tent set up in a parking lot near the Renaissance Center headquarters of General Motors. Like last year's event, this runway show featured cars and fashions, but the feel of it was a bit different this year. This time last year, GM had yet to make its big design comeback breakthrough, for instance. Also, the cars were almost secondary to the celebrities last January. This time around, a year after the CTS, Malibu and Volt debuted in the days following the first GM Style event, the red carpet was gone and the fashions were worn by anonymous models, with musical accompaniment from Mary J Blige, Maroon 5 and Kid Rock. For 2008, the cars were the real stars. The automotive lineup was bookended by the oldest and newest Corvettes with a group of contemporary models in between. BTW, the tall gentleman in the front row who's white brimmed hat keeps popping up at the bottom of the pics? Detroit Mayor Kwame Kilpatrick.
Following the introductions of the Chevrolet Volt and Opel Flextreme during 2007 auto show season, Cadillac is bringing forth a third design based on the E-Flex architecture. The Cadillac Provoq concept is intended to help give the brand an image of premium sustainability by updating the fuel cell E-Flex powertrain that was shown in a Chevy Volt at the Shanghai Motor Show last year. The Provoq is a luxury crossover design that's considerably larger than the Volt.
With updated Cadillac styling cues on a 180-inch long CUV body, it's stretched 10 inches longer than a Volt to allow comfortable seating for five passengers. The Provoq is built around GM's fifth-generation fuel cell stack combined with a 9kWh lithium ion battery pack. The electrical energy is used to power a 70kW AC motor driving the front wheels and a pair of 40kW hub motors at each rear corner. Like the other E-Flex vehicles, the Provoq has plug-in capability and the battery has enough capacity for about twenty miles of driving range. Combined with the 6kg of compressed hydrogen gas stored in its two tanks, the Provoq has a total range of about 300 miles. Clay Dean's Cadillac design team incorporated some of the aerodynamic lessons learned by the Volt crew, including thermostatically controlled slats in the grille to minimize drag when cooling air flow isn't needed. Check out niot for more details on the Provoq concept.
