Gen 3 2.0 Project
09-18-2013, 05:13 PM
#45
taken from a gm powertrain article.
2011 ECOTEC 2.0L I-4 VVT DI TURBO (LHU)
Vehicle Applications
Buick Regal
Product Highlights
Twin-scroll turbocharger
Air-to-air intercooler
Gen II sand-cast engine block
Forged steel crankshaft
Aluminum pistons with jet-spray cooling
Rotocast aluminum cylinder head with sodium-filled exhaust valves
DOHC with continuously variable valve timing
Direct injection
Cam-driven high-pressure fuel pump
E85-capable
Cam-driven vacuum pump
220 horsepower (164 kW)
260 lb.-ft. torque (353 Nm)
Overview
Available in the Buick Regal CXL, the Ecotec 2.0L turbo (LHU) is a next-generation derivative of the Ecotec 2.0L turbo LNF engine, introduced for the 2007 model year and the first North American engine with direct injection. It is tuned to meet the unique performance, efficiency and quietness targets of the Buick Regal and it is rated at 220 horsepower (164 kW) and 260 lb.-ft. of torque (353 Nm).
The Regal is a global car and the Ecotec 2.0L turbo's development applied the best practices of technical centers in Europe and North America. It was subjected to one of the toughest, most comprehensive validation processes ever at GM, which included millions of miles of real-world road testing in a broad range of climates and environments. The result is a powerful and efficient engine that delivers the smoothness and quietness commensurate with Buick.
As with all Ecotec engines, it features durability and technology features familiar in premium V-type engines, including low-friction hydraulic roller-finger valve operation and an electronic throttle. A hydraulic tensioner keeps the timing chain adjusted for life, and extended-life spark plugs deliver 100,000 miles (160,000 km) of service.
Additional Ecotec family traits include:
Dual overhead camshafts (DOHC) with four valves per cylinder
Twin counter-rotating balance shafts to cancel the second-order vibration typical in four-cylinder inline engines
Full-circle transmission attachment and a structural oil pan that bolts to both the engine block and transmission bell housing.
Gen II Engine Block
The Ecotec 2.0L turbo sand-cast cylinder block is a superior refinement of previous Ecotec engine block castings. It is dimensionally similar with previous Ecotec turbo block variants, while providing improved structural support, as well as enabling greater control of noise, vibration and harshness.
The main bearing bulkheads, which support the crank bearings, as well as the cylinder bore walls have been significantly strengthened to support increased engine loads. Refinements to the oil distribution system enable improved oil flow throughout the engine and an expansion of the coolant jacket, along with the use of cast-in-place bore liners, allows more precise bore roundness and improves the blocks ability to dissipate heat.
2011 ECOTEC 2.0L I-4 VVT DI TURBO (LHU)
Vehicle Applications
Buick Regal
Product Highlights
Twin-scroll turbocharger
Air-to-air intercooler
Gen II sand-cast engine block
Forged steel crankshaft
Aluminum pistons with jet-spray cooling
Rotocast aluminum cylinder head with sodium-filled exhaust valves
DOHC with continuously variable valve timing
Direct injection
Cam-driven high-pressure fuel pump
E85-capable
Cam-driven vacuum pump
220 horsepower (164 kW)
260 lb.-ft. torque (353 Nm)
Overview
Available in the Buick Regal CXL, the Ecotec 2.0L turbo (LHU) is a next-generation derivative of the Ecotec 2.0L turbo LNF engine, introduced for the 2007 model year and the first North American engine with direct injection. It is tuned to meet the unique performance, efficiency and quietness targets of the Buick Regal and it is rated at 220 horsepower (164 kW) and 260 lb.-ft. of torque (353 Nm).
The Regal is a global car and the Ecotec 2.0L turbo's development applied the best practices of technical centers in Europe and North America. It was subjected to one of the toughest, most comprehensive validation processes ever at GM, which included millions of miles of real-world road testing in a broad range of climates and environments. The result is a powerful and efficient engine that delivers the smoothness and quietness commensurate with Buick.
As with all Ecotec engines, it features durability and technology features familiar in premium V-type engines, including low-friction hydraulic roller-finger valve operation and an electronic throttle. A hydraulic tensioner keeps the timing chain adjusted for life, and extended-life spark plugs deliver 100,000 miles (160,000 km) of service.
Additional Ecotec family traits include:
Dual overhead camshafts (DOHC) with four valves per cylinder
Twin counter-rotating balance shafts to cancel the second-order vibration typical in four-cylinder inline engines
Full-circle transmission attachment and a structural oil pan that bolts to both the engine block and transmission bell housing.
Gen II Engine Block
The Ecotec 2.0L turbo sand-cast cylinder block is a superior refinement of previous Ecotec engine block castings. It is dimensionally similar with previous Ecotec turbo block variants, while providing improved structural support, as well as enabling greater control of noise, vibration and harshness.
The main bearing bulkheads, which support the crank bearings, as well as the cylinder bore walls have been significantly strengthened to support increased engine loads. Refinements to the oil distribution system enable improved oil flow throughout the engine and an expansion of the coolant jacket, along with the use of cast-in-place bore liners, allows more precise bore roundness and improves the blocks ability to dissipate heat.
