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It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy. Estimated performance on EPA tests shows a 5.5–7.5% improvement in fuel economy. [1] GM's Active Fuel Management [2] technology used a solenoid to deactivate the lifters on selected cylinders of a pushrod V-layout engine.
SIDI (Spark Ignition Direct Injection) Ecotec – petrol Medium Gasoline Engine produced by Adam Opel AG. EcoTec3 is the name used on General Motors' Small Block Gen 5 Engines. All include direct injection, cylinder deactivation, and continuously variable valve timing, either in V6 form of 4.3L or V8 form of either 5.3L or 6.2L.
It was the simplest, most basic 5.3L V8 of its family, lacking any special technologies. Also known as the Vortec 5300, the LH8 was available in the H3 and GM mid-size pickups through 2009. The LH8 is a variant of the 5.3L Gen IV small-block V8 modified to fit in the engine bay of the GMT345 SUV and GMT355 trucks.
The oldest engine technological predecessor for the variable-displacement engine is the hit and miss engine, developed in the late 19th century.These single-cylinder stationary engines had a centrifugal governor that cut the cylinder out of operation so long as the engine was operating above a set speed, typically by holding the exhaust valve open.
The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1.2 and 2.5 litres.Confusingly, the Ecotec name was also applied to both the Buick V6 Engine when used in Holden Vehicles, as well as the final DOHC derivatives of the previous GM Family II engine; the architecture was substantially re-engineered for this new Ecotec ...
This was so named because it began with Chevrolet's V8 engines. Chevrolet big-block V8s; Chevrolet small-block V8s; GM Vortec 4300 90° V6; GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations) Jeep with GM Iron Duke inline 4 2.5L/151 in 3 (1980-1983).
In late 2014, Chevrolet released the 2015 Silverado SSV (Special Service Vehicle) to complement its lineup of law enforcement vehicles. The SSV Silverado was available in the 1500 Crew Cab with either the short (5.5') or standard (6.5') box. The 5.3L EcoTec3 V8 was the only engine option, and the SSV was based on the WT trim.
1977–2013 Chevrolet 90° V6 engine (derived from the Chevrolet Small-Block" V8; now marketed as GM Vortec V6 or Vortec 4300 or EcoTec3 V6) 1979–2010 Chevrolet 60-Degree V6 1994–2005 Opel 54-Degree L81 V6 (used in the Saturn Vue , Cadillac Catera and Saturn L series )