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Tuesday, August 18, 2015

Audi Q7 e-tron: Are You My Electric SUV?

Audi's e-tron project has quietly been stalking Tesla. From the R8 supercar to the A3 hatchback, they have some ambitious EV and PHEV ideas. The Q7 e-tron is one of the few 7 passenger vehicles out there with at least some all-electric range. Could this be the family car we've been looking for? Read my original review then we can discuss it.

Image via Best Green Cars.

Audi Q7 e-tron: Enough Plug-In TDI for the Whole Family

This week at the Geneva Auto Show, Audi displayed its family sized PHEV. Seven-seat plug-in hybrids just got a little less rare. For drivers who need three rows of seats and want some electric range, it's been hard finding anything to drive.

The Q7 e-tron boasts an astounding 166 MPGe. Is it really that much more efficient than the 124 MPGe BMW i3? It's probably measured with the very generous European scale, but remember what Audi has done well for a long time: diesel. Particularly their Turbo-charged Direct Injection (TDI) engines. It's the sort of engineering that allows the Golf TDI 2.0 to get 45 highway MPG.

Combine Audi's old skill at turbo diesel with their new passion for electricity, and you get a lot of performance and range. The Q7 e-tron uses a 3.0 liter TDI V6 and an electric motor to produce a combined 373 horsepower and 516 pound-feet of torque. Zero-to-sixty time is six seconds with a top speed of 139 mph. The eight-speed automatic transmission can de-couple from the drive-line, allowing the vehicle to coast for maximum efficiency.

The 17.3 kWh lithium-ion pack is built into the center tunnel. It enables the Q7 to travel 34 miles on pure electricity. With a high-voltage outlet, it can recharge in two and a half hours. A full battery and diesel tank will give the SUV a whopping 876 mile range. With Audi's famous Quattro all-wheel drive, traction will be no issue.

Read the rest of the review at Best Green Cars.

Image via Best Green Cars.

So, is this my electric family car? Let's go down the WIMEMV checklist:

Zero-Emissions?

For about 34 miles. After that it's a clean diesel. Depending on how your family drives, a PHEV will make most of your everyday miles all-electric. Then you have fossil-fuel range for the long trips. Still a major improvement. This thing will burn much less fuel than most big SUVs, so you can't complain about that.

Family-Size?

Seats seven in three rows, which is one of the requirements. Comparing the 2015 Q7 to the same year Toyota Sienna, most size numbers are very close except for the luggage volume and third row space. As expected, the minivan is a bit more roomy. So the Q7 will get you and the squad to hockey practice, but maybe not camping.

Image via Best Green Cars.
Comfortable?

Certainly. It's a luxury vehicle with all the touches you'd expect from a BMW and Mercedes-Benz competitor, like Bang & Olufsen sound and a virtual cockpit. The neighbors would be jealous and the kids would be spoiled.

Affordable?

Um, well no. When it goes on sale in Europe in early-to-mid 2016, the price could be well over $90,000. Not family priced. Surely it will have considerably more gizmos than I think I need. You know me. I'd rather have an engine, seats and a glovebox full of cash than a $90,000 car.

Available?

If it comes to the US, it won't be until 2017. Hopefully the EV marketplace will be very different then. We should have the Tesla Model X and maybe the Chrysler PHEV minivan. A high-end PHEV SUV may not sell. So, nothing we can do about this Audi for now.

Still I think PHEV technology is the bridge between ICE and advanced long-range batteries of the future. People can have zero-emissions short range and long range when they need it.

Thanks for giving this to somebody, Audi, if not us.

Monday, August 17, 2015

Where is my Compressed-Air Minivan?

May 1, 2015, the AIRPod made a splash in "Shark Tank" when it earned a $5 million pledge. Can compressed air engines truly power a passenger car? The technology is over a century old. Has it been repressed like so many other alternative power sources? How clean is it truly?

Will Compressed Air Power Tomorrow's Cars?
Originally published at BrightHub.com.

Could the future of automobiles be compressed air engines rather than ones fueled by batteries or hydrogen fuel cells?

The AIRPod

Motor Development International of France designed the AIRPod. It's a small three-wheeled city car that seats a driver in the front and two rear-facing passengers in the back. It has no pedals or steering wheel. Rather, a joystick controls this car. Range is about 100 miles with a top speed of 50 mph. Built mostly from resin and fiberglass, the AIRPod weighs a mere 600 pounds. ZPM hopes to sell them by the end of 2015 for around $10,000
.

Image via Best Green Cars.

Learn about the history of compressed air engines, their real world possibilities and their limitations.


Where is my Solar-Powered Minivan?

BestGreenCars.com has an overview page for each of the major types of alternative fuel vehicles: all-electric, plug-in hybrid and hydrogen fuel cell. Editor Assen Gueorguiev asked me to write one about solar-powered cars.

How does solar power work? Can a useful passenger car be powered by photovoltaic cells? I found the answer and it's almost yes. Please read on.


The Quest for Solar Powered Cars
Originally published at bestgreencars.com

We are currently traveling over 66,000 miles per hour around a giant nuclear reaction that produces 5x1023 horsepower per second. Let's plug our cars into that.

It's not that simple, but we're working on it. Occam's Razor states that the simplest answer is usually the best one. When did we decide that pumping oil from inside the Earth, refining it into gasoline to run our vehicles with, while releasing poisonous fumes, was the simplest answer?


How Solar Works

The modern photovoltaic cell is built mostly of silicon with some phosphorous and boron. Each silicon atom has fourteen electrons arranged within three shells. The first shell holds two electrons and the second holds eight. Both shells are full. The third holds four but is only half full. The atom wants to fill these holes so it eagerly shares electrons with neighboring atoms.

This is how molecular bonds are formed. Each silicon atom shares an electron with four of its neighbors, forming a solid crystalline structure. This makes pure silicon a poor conductor of electricity because the secured electrons don't want to flow. Impurities are necessary. Phosphorous and boron are added, making up about one out of every million particles.

Learn about the World Solar Challenge, the Ford C-Max Solar Energi and all of its predecessors.