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2015 24 Hours of Le Mans live race report

Check back regularly for more race updates every few hours. No, you don't need to stay up for the entire 24 Hours of Le Mans, but if you want to catch any of the action, Autoblog friend Reilly Brennan has a handy guide. And to keep you up to speed on the latest race events, we'll be posting live from Le Mans with regular race reports.Hour 1: Five laps in, Audi breaks up the three Porsches at the front, with the #19 919 Hybrid, driven by Nico Hulkenburg, passed by all three R18s. Hulkenburg eventually took back fifth position only to fall back again after the first pit stop. Meanwhile, clutch trouble kept the #23 Nissan GTR-LM in the pits until 15 minutes into the race. The other two Nissans were forced to start at the back of the grid after failing to the meet the 110 percent qualifying speed regulation. At the end of the first hour, just 7.5 seconds separated the first six cars. Then the factory team #92 Porsche GTE car caught fire, with the the #13 Rebellion P1 car taking frontal damage in the ensuing carnage. With the safety car out, the field is once again bunched up.Hour 2: The slugfest between Audi and Porsche continues, with neither side backing off. Halfway through the second hour the #7 R18 passes both leading Porsches for the top position. After another round of pits stops Porsche regains the lead until lap 30, when the Audi overtake once again and quickly pulls out a three-second gap. Nico Hulkenburg passes the other two Audis to join his Porsche teammates. At the beginning of the third hour it's Audi #7, Porsche #17, #18, and #19, followed by Audi #8 and #9. 33 seconds separates this group, with Toyota a minute back from the front car.Hour 3: On track the action refuses to stop. Although it's early, Audi is looking strong with the overall lead in the #7. What's more is that the Audis run four stints per set of tires, while the Porsche cars have to change rubber every third stop. But after a quick refueling, the lead R18 gets a tire puncture and comes back in 3 laps later, allowing Porsche to take over the top two spots. Then as the hour closes out a yellow flag causes traffic to bunch up and the #8 Audi gets stuck with nowhere to slow down. Driver Loic Duval dives for the side of the road but hits the guard rail and careens across the track, damaging the front and rear bodywork. The rest of the car is still intact, though, and once in the pits Audi replaces the entire front and rear of that in only three minutes.

Recharge Wrap-up: New and old Audis get greener, as does US electricity

Audi has made environmental improvements to the its TT while boosting performance. The new TT sees an 11-percent reduction in emissions, and up to 14 percent more power. Audi says that each TT will save around 5.5 metric tons of greenhouse gas emissions over its lifecycle. Additionally, the TT's manufacturing process has been cleaned up a bit, reducing emissions by about nine percent. Read more in the press release, below, or see Audi's lifecycle assessment here. Speaking of greening up Audis, Al Swackhammer of Washington converted his 1960 Audi DKW 1000S to run on electric power. Swackhammer first fell in love with the Audi Ur-Quattro, became an enthusiast of Audi and Volkswagen cars, and has owned nothing else ever since. With his DKW, he combined his passion for the classic car with his responsibility to the environment. "I am pleased that I did this project," says the happy owner, "and I enjoy driving it very dearly." Meet the man and his beloved electric Audi DKW in the video below. Toyota has chosen a sustainable design firm, Corgan, as the lead architect for its new North American headquarters. The new campus will be built in Plano, TX, and will be the workplace of about 4,000 Toyota employees. Corgan, who has already done 47 LEED certified projects, is already designing a temporary office for the site while it finishes the project. Toyota expects to begin working from the site in late 2016 or early 2017. Learn more in the press release below. In July, all new electrical generating capacity in the US came from renewable sources. The Federal Energy Regulatory Commission's Office of Energy Projects' newest "Energy Infrastructure Update" report says new electric generation put into service last month came from wind (379 megawatts), solar (21 megawatts) and hydro (5 megawatts). So far this year, 53 percent of new energy generation capacity has come from various renewable sources, and none from coal or nuclear. Currently, renewable energy accounts for 16.3 percent of the US electric generation capacity, providing about 14 percent of actual electricity. Read more in the press release from the Sun Day Campaign below. Positive life cycle assessment for the new Audi TT Compact sports car scores high for dynamic performance and efficiency Emissions reduced by 11 percent compared with predecessor Customer benefits from the very first mile Ingolstadt, August 18, 2014 – Dynamic performance and efficiency: The new Audi TT* impressively combines both qualities.

The tumultuous history of the diesel engine

Volkswagen, diesel's most enthusiastic patron, deceived everyone about the amount of emissions its cars were putting out. We have covered this latest massive automotive scandal in great detail, and there are surely more fascinating revelations to come. It turns out that this is just the latest episode in the epic story of the controversy and intrigue surrounding the diesel engine, and its inventor. This is the story of the tumultuous birth and interesting evolution of the compression-ignition engine at the center of the VW scandal. Napoleon III Got Rudolf Diesel Deported Rudolf Diesel was born in Paris in 1858. His Bavarian parents had settled in France where his father, Theodor, was a leather goods manufacturer. When the French Parliament declared war on Prussia, kicking off the Franco-Prussian war, the Diesels fled to London. When he was 12, Rudolf went to live with his aunt and uncle in the Bavarian university town of Augsburg. It was his parents' hometown, and importantly, it's where Rudolf began studying at the Royal County Trade School. His time in Augsburg, graduating at the top of his class from trade school that laid the groundwork for all that was to come. Diesel Nearly Blew Himself Up An early career in refrigeration saw Diesel running R&D in Berlin for Linde, a company started by refrigeration pioneer Carl Von Linde, one of Diesel's professors. His ambition to branch out beyond refrigeration, and his deep understanding of thermodynamics, led to efficiency experiments with steam engines. Diesel was trying to create an engine that didn't waste heat from the combustion process, therefore getting the most work out of the fuel. Instead, he was nearly killed when an experimental ammonia vapor steam engine exploded. Recovery took many months, and during some of that time, he was no doubt planning his next experimental engine, based on the theoretical Carnot cycle. His Engine Was An Attempt To Stick It To The Man Steam engines were expensive to run and wasteful. Diesel thought the efficiency of his design would be a way for the small business to compete with the dominant industrial giants. It was, and it did, but big business is equally passionate about chasing efficiency. Diesel engines quickly proliferated in industries both grand and cottage. Rudolf Didn't Really Invent The Diesel As We Know It Instead, he improved an existing one to a significant degree. The Diesel engine could be considered an evolution of the "hot-bulb" engine.