![]() Twin counter-rotating balance shafts, inherent in the Ecotec engine architecture, spin at twice the speed of the engine crankshaft to cancel the second-order vertical shaking forces experienced by inline four-cylinder engines. The individual ignition modules for each spark plug enhance combustion and engine energy efficiency. Individual coil-on-plug ignition modules improve upon the two-coil "cassette" of the original Ecotec design. The digital sensors improve information processing and reliability, which in turn means more-efficient engine performance. “Digital sensors are more accurate and provide improved reliability,” said Subhedar of this emerging trend in engine-monitoring technology. It incorporates 32 megabytes of burst flash memory and 32 kilobytes of external RAM and 36 kilobytes of internal RAM, as well as a high-speed CAN bus to deliver optimal networking capability.Īll engine-related sensors for the Ecotec 2.4-liter are digital rather than analog. The Ecotec 2.4-liter is one of the first GM engines to employ this sophisticated new controller that leverages 32-bit processing power. This well-proven "drive-by-wire" control allows for remarkably precise engine control and response, while simultaneously enhancing the engine’s interface with other vehicle systems.Īn all-new, engine control module (E67). The ETC system eliminates the physical connection between the accelerator pedal and the engine throttle. The new Ecotec enjoys a host of new technical enhancements:Įlectronic throttle control. Yet the system adds little weight or assembly complexity to the basic Ecotec DOHC architecture because the Ecotec family was designed from the beginning to easily accept technology advances such as variable camshaft phasing.īut the new Ecotec 2.4-liter's technology story hardly stops there. The new variable valve timing system uses electronically controlled hydraulic camshaft phasers to alter the relationship of the intake and exhaust camshafts as much as 50 degrees relative to the crankshaft. ![]() These increases, multiplied by each of the Ecotec 2.4-liter’s four cylinders, yield a total displacement of 2,384 cubic centimeters versus the original 2.2-liter's 2,189 cubic centimeters.īut equally important to delivering class-leading torque is the Ecotec 2.4-liter’s new variable valve timing system, developed to enhance the low- and midrange torque output of the new engine. The new engine's bore is 88 mm and stroke is 98 mm, versus the 2.2-liter's 86-mm bore and 94.6-mm stroke. For the new 2.4-liter variant, both cylinder bore and stroke are increased in relation to the original Ecotec 2.2-liter engine. Increasing displacement is perhaps the most-proven technique to improve horsepower and torque, and that’s where GM Powertrain engineers started when developing the Ecotec 2.4-liter. Intelligent Technology as Important as Cubic Inches ![]() The new Ecotec 2.4-liter engine's torque-rich power delivery and its designed-in refinement deliver a driving experience that will please both performance-oriented buyers and those simply seeking a more sophisticated feel from a compact-car powertrain. – for a 2.4-liter normally aspirated four-cylinder in the United States And the Ecotec 2.4-liter's 170 horsepower at 6000 rpm also is one of the highest specific-power outputs for any non-boosted four-cylinder of any size sold in the U.S., according to Ward's 2003 market data. ![]() The combination of slightly more displacement and variable valve timing enables the Ecotec 2.4-liter to achieve one of the highest torque ratings – an estimated 170 lb.-ft. That sort of responsiveness enormously enhances engine response." "For the new Ecotec, variable valve timing helps deliver 90 percent of the torque peak at as low as 2400 rpm. "We have added technology to improve low-end torque and continue to reduce emissions," said Jay Subhedar, Ecotec global four-cylinder engine assistant chief engineer. But along with the larger displacement, which has become vital in the increasingly competitive compact-car segment, the 2.4-liter for the first time brings variable valve timing to the Ecotec modular engine family. GM Powertrain's new Ecotec 2.4-liter four-cylinder engine, slightly modifies that well-used adage, "There’s no substitute for cubic inches." In the case of this slightly larger version of the original Ecotec 2.2-liter, one of GM's highest-volume engine families, there are a few more cubic inches found in the new 2.4-liter variant. Nope no new pistons, stock motor so far for the hahn kit. ![]()
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