Posted on

GM creates a Tesla task force

We've already heard reports that General Motors is working on a new electric vehicle with a Tesla Model S-like range of 200 miles (322 km) but new details are starting to emerge about the company's Tesla task force.

In an interview with Reuters, General Motors Vice Chairman Steve Girsky revealed the company has created a new task force to study Telsa and the Model S. The diverse group - which includes product planning, engineering, manufacturing and sales personal - will attempt to learn everything they can about Tesla so they can improve their own future products. As Girsky explained, Tesla is "revolutionizing the business model ... not just how you put an EV together [but] how you go to market with something like this."

While it's unclear what lessons General Motors will learn, the company is reportedly working on a handful of new hybrids and EVs. Besides the 200 mile (322 km) Chevrolet EV, which is expected to cost between $30,000 and $35,000, the company is reportedly developing fuel-efficient flagships which could be badged as Cadillacs and cost more than $100,000.

Source: Reuters

Posted on

Porsche 918 Spyder: Engine Technology [VIDEO]

The Porsche 918 Spyder is a plug-in hybrid with four driving modes, two electric motors, and a 4.6 liter mid-mounted V8 engine. E-Drive is an all-electric mode primarily for city driving, with a range of up to 20 miles and a top speed of only 93 mph.

There are also three different “hybrid” modes (Hybrid, Sport, and Race) that use varying degrees of power from both the V8 engine and two electric motors. Hybrid mode is obviously on the more fuel-frugal end, with the engine and electric motors working to optimize fuel economy. Meanwhile Race mode is reserved for on-track shenanigans, with a special sub-mode called “Hot Lap” which unleashes the full fury of the 918 Spyder, with the electric motors providing even more of a power boost.

The 918 Spyder also has a carbon fiber-reinforced monocoque for a curb weight of just over 1,632 kg. But really, it’s all about the cutting edge drivetrain, and while it may remain prohibitively expensive for now, there’s no doubt Porsche is working to bring more economy-minded plug-in hybrids to the roads. The 918 Spyder is merely the R&D test bed.

Posted on

Top Gun Scrutineering for the Bridgestone World Solar Challenge [VIDEO]

The Clipsal and Schneider Electric Challenger Class single seat aerodynamic masterpieces were presented to Scrutineering on day 2 of the Bridgestone World Solar Challenge at the Royal Darwin Showgrounds.

This year’s Bridgestone World Solar Challenge is held from 6th – 13th October. If you can’t make it to Darwin or Adelaide, you can follow the race on Twitter via @tsport100 or @WorldSolarChlg.

Disclosure: This post is sponsored by Bridgestone World Solar Challenge. Words and thoughts are entirely my own.

Posted on

World’s Most Efficient EVs Travel 3,000 km without Plugging-In

This time next week the world's most energy efficient electric cars will be hitting speeds of up to 130 km/h (81 mph) as they race 3,000 km (1,865 Miles) coast to coast across the Australian Outback contesting the Bridgestone World Solar Challenge.

The outright contenders for line honours will come from the big budget single seater aerodynamic vehicles of the Schneider Electric Challenger Class. The only external energy source allowed during the race is solar irradiation received by a maximum of either 3 square meters of high-efficiency (22.5%+), triple-junction gallium arsenide (GaAs) solar cells or 6 square meters of silicon based solar cells with less than 22.5% efficiency. The solar array is paired with a maximum on-board energy storage capacity of 5 kw/h to assist with energy use strategy, hills, clouds or extra acceleration for overtaking.

To have a good chance to win each car has to 1) Collect as much solar energy as possible and 2) Use as little energy as possible. This means special attention needs to be applied to the efficiency of transferring electrical energy to the wheels and minimising friction from aerodynamic drag and rolling resistance which is affected by vehicle weight amongst other things.

To achieve the electrical efficiency goal, every Bridgestone World Solar Challenge winner since at least 1999 has used a direct drive in-wheel motor to propel the vehicle. Direct drive eliminates mechanical transmission losses that can be as much as 20%.

Solar cars use very low rolling resistance tires that are specially designed for this race with a rolling resistance ten times less than an average road car. With the rolling resistance of a cars tyres accounting for roughly 20% of all energy used, tyres can account for up to one in every five tanks of fuel in a regular road car. Vehicle weight is also kept extremely low with extensive use of carbon fiber, again to minimise rolling resistance.

Tokai Challenger in 2011 won with an average speed of 91.54 km/h (56 mph). With such high average speeds combined with the physics of air resistance being proportional to the square of speed, aerodynamic drag is the main source of losses on a solar race car. Much design effort is invested in CFD computer simulation, scale and full size wind tunnel testing. The best solar race cars achieve a drag coefficient as low as 0.07 (Nuna 3 – which holds the record for highest average winning speed @ 102.8 km/h) where a road car ranges from 0.24 (Tesla Model S) to 0.35 (Toyota Land Cruiser).

It is the chase of maximum aerodynamic efficiency that has lead to the race winning dominance of “coffee table” type vehicle designs which brings up the question of how practical can a solar-powered vehicles be? The 2013 Bridgestone World Solar Challenge sees the introduction of the Michelin Cruiser Class which is not focused on speed but practicality, with the ultimate goal of entrants being able to meet the requirements for road registration. Cruiser Class cars must seat a minimum of two people and will be allowed over-night battery charging at select locations.

While the Michelin cruiser class aligns solar race car design more closely with road car requirements, if the limitations of having the solar panels on the vehicle itself are removed, powering a regular road going EV with solar power is an affordable reality today!

Tesla Motors recently launched a network of solar powered superchargers capable of charging their Model S to 320 km of range in 30 minutes. Even a modest 1.5 kw residential roof-top PV solar system generates enough energy to power a commuter EV like a Nissan Leaf for more than average annual mileage. In fact, displacing the cost of petrol instead of grid power will reduce the break even time on a roof-top PV installation to just a few months.

This year’s Bridgestone World Solar Challenge is held from 6th – 13th October. If you can’t make it to Darwin or Adelaide, you can follow the race on Twitter via @tsport100 or @WorldSolarChlg.

Disclosure: This post is sponsored by Bridgestone World Solar Challenge. Words and thoughts are entirely my own.

Posted on

San Diego Gets First Public SAE Fast-Charging Station for EVs

The SAE International DC “Combo” Fast Charge station installation at the Fashion Valley Mall in San Diego is a milestone for plug-in electric vehicles – the first public installation in the U.S. of an industry-coordinated standard for fast charging of plug-in electric vehicles.

The Chevrolet Spark EV, available in California and Oregon, will be the first EV in the U.S. to offer the SAE International fast-charge connector as a vehicle option starting in late December.

“The launch of these new charge stations will help improve the convenience and adoption of electric vehicles because they dramatically reduce the charge time,” said Pamela Fletcher, executive chief engineer of electrified vehicles at General Motors. “The SAE Combo DC fast charge stations are the result of EV industry collaboration to help customers benefit from available public infrastructure.”

The new combined AC and DC charging, or combo, connector is accessible via a single charge port on the vehicle and allows electricity to flow at a faster rate, making EVs more convenient for longer trips and for EV owners who may lack convenient access to overnight home charging.

“San Diego Gas & Electric applauds the collaborative efforts it took to make San Diego home to the world’s first retail SAE DC fast charge station,” said Lee Krevat, director of smart grid and clean transportation for the utility. “Our local drivers that have vehicles equipped with this charging system connector will be the true beneficiaries of this technology.”

Many major automakers including GM, Ford, Chrysler, BMW, Daimler, Volkswagen, Audi and Porsche have announced they will adopt the SAE combo fast charge connector standard. Earlier, many of the world’s major automakers had adopted the SAE’s 120V/240V AC connector standard to assure plug-in vehicles could access all charging infrastructure regardless of vehicle make or model.