ENGINE OPERATION in SATURN SKY REDLINE

ENGINE OPERATION in SATURN SKY REDLINE

General Motor introduced its powerful Ecotec 2.0L direct ­injection turbo engine in the 2007 Saturn Sky Red Line at the New York International Auto Show. The engine was hailed by many that year for its capability to produce 260 hp and 260 lb.-ft. of torque, making it one of GM’s highest specific output engines ever, at 2.1 hp per cubic inch of displacement.

The Ecotec 2.0L Turbo was developed with the global resources of GM Powertrain in the U.S. and Europe, drawing on expertise from the naturally aspirated Ecotec 2.2L direct injection engine used in some European applications, and the 2.0L turbocharged engines already in production.

The Ecotec 2.0L Turbo was used in the Saturn Sky Red Line and the Pontiac Solstice GXP, and was GM’s first spark ignition, direct injection offering for North America.

Gasoline direct injection technology helped the Ecotec engine produce more power while maintaining the lower fuel consumption of a small displacement port-injected engine.

Variable valve timing and an intercooled, twin-scroll turbocharging system were used to optimize the Ecotec 2.0L Turbo engine’s performance.

With direct injection, fuel is delivered directly to the combustion chamber to create a more complete burn of the air/fuel mixture. Less fuel is required to produce the equivalent horsepower (especially at normal cruising speeds) of a conventional port-injection combustion system.

GM engineers said that because direct injection technology works well with turbocharging and helps deliver a great balance of power and economy, the 2.0L Turbo produces the power expected of a V6, but in a smaller, more efficient package.