Spark ignition engine fuel injectors run in the 20-to-50 pounds-per-square-inch range, while modern compression ignition engine fuel injectors run in the 30,000-to-50,000 psi range.

2. Regular Octane Meets A 16:1 Compression Ratio . If Mazda had it their way, they’d be running 80 octane fuel in their SPCCI engines rather than the elitist 87 you find on the affordable nozzle ...

Hyundai says that its under-development mill, which it calls GDCI (Gasoline Direct Compression Ignition), will achieve a 25 percent improvement in mileage compared to its current crop of spark ...

The engines use a conventional spark ignition for cold starts and when HCCI is disengaged. Fuel comes from conventional injectors located in the center of each combustion chamber.

Mazda’s hotly anticipated SKYACTIV-X Spark Controlled Compression Ignition engine has been described as the “Holy Grail” of gasoline motors—something with diesel-like fuel economy, but far ...

Diesel (compression-ignition) and petrol (spark-ignition) engines have their fuel injection systems, providing portion fuel injection through small nozzles under high pressure in the combustion ...

Yesterday at the Tokyo Motor Show, Mazda released new info on its highly anticipated compression-ignition Skyactiv-X engine.It's all a bit daunting if you're not an engineer, but helpfully, Mazda ...

Mazda is predicting about 188 horsepower and 170 lb-ft of torque from the 2.0-liter Skyactiv-X. Today’s 2.0-liter Skyactiv-G engine, as fitted to the 3, makes 155 horsepower and 150 lb-ft of ...

Mazda’s powertrain team has brewed up a fancy new engine that, like a diesel, uses compression to activate the combustion process. In a press release on the new tech, Mazda tells us just how ...

Hyundai today revealed that it is currently testing a new compression-ignition gasoline engine that is expected to be more efficient than an equivalent diesel. The new Hyundai 1.8-liter inline ...

But the SKYACTIV-X merges the diesel engine's compression ignition—and its efficiency and low-RPM grunt—with the gas engine's high-RPM responsiveness, creating an engine that pulls strongly ...