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Nissan working on something radical for Le Mans

With Porsche joining Audi and Toyota at the front of the LMP1 grid at Le Mans next year, Nissan is the next to be throwing its hat (and considerable R&D budget) into the proverbial ring. But only if it's allowed to do something radically different, according to the latest report in Car magazine.
Just what that means remains to be seen, but Nissan is reportedly in active discussions with the ACO (the body that governs the race) to see how far it can stretch the regulations. The ACO has taken an intriguingly different approach to equalizing performance, mandating the maximum amount of energy that can be used per lap instead of telling teams what kind of engines they can use. That's how Porsche is entering with a four-cylinder engine, Toyota with a V8 and Audi with a diesel six. But when it comes to the shape of the car itself, the rules are considerably more restrictive.
Unfortunately the rules would prohibit Nissan fielding the ZEOD RC (with its narrow front track) in the LMP1 class, relegating it instead to the Garage 56 slot for experimental racers (which the DeltaWing filled before). And the realities of endurance racing would effectively prohibit anyone from fielding an all-electric racer. Within those confines, though, Nissan is eager to find enough wiggle room to make something both visually and technically different from other LMPs. And if the ACO won't let it do so at Le Mans, it could turn to another race or series (like the Nürburgring 24) that would.

Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

Geely and Renault joint venture will develop internal combustion and hybrid tech

China's Geely Automobile Holdings and French car maker Renault SA on Tuesday said they will invest up to 7 billion euros ($7.71 billion) in a new equally held joint venture to develop gasoline engines and hybrid technology for automobiles. The JV is aimed at manufacturing more efficient internal combustion engines and hybrid systems at a time when the focus of much of the automobile industry has been on the capital-intensive transition to purely electric vehicles. "We are pleased to be embarking on this journey to become a global leader in hybrid technologies, providing low-emission solutions for automakers around the world," said Eric Li, Geely Holding Group chairman. The new company will employ 19,000 people at 17 engine plants and five research and development hubs, Renault said. At launch, it is expected to supply to multiple industrial customers including Volvo, Proton, Nissan, Mitsubishi Motors, and PUNCH Torino. The JV aims to have an annual production capacity of up to five million internal combustion, hybrid and plug-in hybrid engines and transmissions, Renault added. Reuters reported in March that the new venture will see 15 billion euros ($16.53 billion) in annual revenue. Saudi Aramco, which signed a letter of intent with Renault and Geely in March, is evaluating a strategic investment in the new company, Renault said. The Saudi oil producer has been involved in advanced discussions to take a stake of up to 20% in the JV, sources said earlier this year. Big oil firms have worked with automakers to develop sustainable fuels and hydrogen engines in recent years. But a deal here would make Aramco the first major oil producer to invest in the car business. The joint venture is expected to be launched in the second half of 2023. Earnings/Financials Green Mitsubishi Nissan Volvo Renault