It is often assumed that the internal combustion engine sees zero improvement, whereas battery-electric cars improve by 6% per year on average. Seen that way, the battery-electric car “catches up” to ...

When it comes to traversing great distances at highway speeds, the diesel engine's higher compression ratios and lean-burn combustion provide an efficiency that no gas engine can currently match—at ...

Most internal combustion engines are incredibly inefficient at turning fuel burned into usable energy. The efficiency by which they do so is measured in terms of "thermal efficiency", and most ...

Delphi is developing an engine fuel injection technology that could improve the fuel economy of gas-powered cars by 50 percent, potentially rivalling the performance of hybrid vehicles at less cost.

From hybrid powerhouses to sharp, eco-friendly haulers, these are the sedans that rule the efficiency charts in 2025.

The auto industry has work ahead to meet ambitious fuel efficiency goals of 55 mpg by 2025 — nearly twice the current average required. Hybrid and electric cars will play a role, but the plain old ...

(This story published on March 2 corrects paragraph 5 to show bpd, not tonnes) Demand for gasoline in the United States, which accounts for a tenth of global oil consumption, is expected to peak next ...

Transonic Combustion, a startup based in Camarillo, CA, has developed a fuel-injection system it says can improve the efficiency of gasoline engines by more than 50 percent. A test vehicle equipped ...

A new version of the internal combustion engine, which could significantly cut gas consumption, might be surprisingly practical and easy to deploy, according to recent findings by researchers at MIT.

Green bars are the engine efficiency. Conventional diesel on the left is 44% and the the best gas-diesel mix would be 53% efficient. Less heat trasfer and exhaust thermal losses. 1. What if an engine ...