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  • What is a gasoline direct injection engine?

  • Today's vehicles grow in complexity with every passing year.

  • Oxygen sensors, catalytic converters, engine control modules, and engines

  • themselves constantly undergo improvements to help vehicles operate

  • more efficiently.

  • One of the more recent and significant trends happening today is the growing use

  • of gasoline direct injection engines.

  • Let's explore why direct injection engines are a hot topic today.

  • A direct injection engine uses a different approach to deliver fuel to

  • the cylinder.

  • As an alternative to the port fuel injector, which delivers fuel past the

  • cylinder's intake valve,

  • the direct injection engine has fuel injectors that spray fuel directly

  • into the combustion chamber.

  • The gasoline direct injection engine is part of a long history of sophisticated

  • and innovative evolutions in the industry, all geared toward common goals:

  • Achieving better fuel economy.

  • Lowering emissions.

  • Increasing engine power.

  • In 1885,

  • Karl Benz invented the carburetor, which mixed liquid gasoline with air to form

  • a vapor that would combust and fuel the car.

  • For nearly a century, the carburetor was used and constantly improved on by the

  • automotive industry.

  • But starting in the 1980's, regulatory changes in admissions and

  • new customer expectations began driving changes to technology.

  • Governments set stringent limits on emissions, with specific requirements for

  • unburned fuel, carbon monoxide, and nitrous oxide emissions.

  • These restrictions initiated the use of the catalytic converter, which is still

  • used today to clean tailpipe emissions.

  • In addition, fuel injection was introduced as a more efficient method of

  • controlling fuel flow and ensuring small droplets.

  • Today, gasoline direct injection engines use the next generation fuel injector,

  • enabling engines to run leaner, with higher compression ratios, and with more power,

  • but while using less gasoline. Like many of today's sophisticated components,

  • gasoline direct injection engines work through complex computer-controlled

  • technologies to achieve the tightest of tolerances to deliver just the right

  • amounts of fuels.

  • These complex new technologies require fuels to evolve at a similar pace.

  • When injectors experience higher temperatures and pressures, it's just

  • that much more important to keep them functioning properly.

  • The right combination of advanced fuel additives are critical in keeping the

  • direct injection engine clean and efficient,

  • delivering the right quantity of fuel at the right time in the right position in

  • the cylinder.

What is a gasoline direct injection engine?

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B2 injection fuel gasoline direct engine cylinder

How gasoline direct injection engines work.

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    小昌 posted on 2014/03/24
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