GM Medium Gasoline Engine


Medium Gasoline Engine is a medium-displacement 4-cylinder gasoline engine developed by Opel Automobile GmbH and marketed as 'SIDI Ecotec'.

History

Production began in late 2012 at Szentgotthárd, Hungary. The engine features Start/Stop and reduces fuel consumption and CO2 emissions by 13 percent comparing to the predecessor, while maintaining Euro 6 emissions standards.
A turbocharged Eco variant delivering @ 4250 rpm and @ 1650-4250 rpm has been introduced at 2012 Moscow International Automobile Salon ; a Performance version with maximum torque and peak power will also be available. Each version features unique turbine aerodynamic, and aggressive boost strategies improve low-end torque.
The high-performance turbocharged 20A4E engine with central direct injection has bore and stroke, with cylinder pressure of and compression ratio of 9.5:1 for Performance version and 10.5:1 for Eco version is developed and manufactured by Chinese Saic Motor company. It uses a grey cast-iron block with die-cast aluminum bedplate, aluminum cylinder head, chain-driven DOHC valvetrain with hydraulic tensioners, dual continuous variable cam phasing, and forged steel crankshaft. The engine has twin balance shafts and specially designed cam cover to improve NVH, while optimized compressor geometry, acoustic resonators and overall air handling help reduce noise by 2 dB. Centrally placed injector allows optimal operation in both stratified and homogeneous charge ignition. Optimized main bearing journal diameter, roller cam followers, and PVD coated piston rings reduce friction.
Starting in 2013, the engine began to replace turbocharged 1.6 L Family I Ecotec engine in Opel cars, and in 2014-2015 it will replace naturally aspirated 1.6 L and 1.8 L Family 1 engines in Chevrolet cars. Starting with 2020 model year, this engine is no longer available for the United States market, due to Buick Cascada and Chevrolet Malibu Hybrid being phased out because of low sales and high importation taxes from Europe.

Models

NameDisplacementBore x StrokeCompression RatioPowerTorque
A16XHT 9.5:1 at 4750-6000 rpm
A16SHT/B16SHT 9.5:1 at 5500 rpm
11.5:1 at 5000 rpm at 4750 rpm
SAIC 20L4E 2.0 TGI
10.0:1 at 5300 rpm
at 5300 rpm
at 5000 rpm 		at 2500–4000 rpm
at 2000–4000 rpm
at 2500–3500 rpm
SAIC 20A4E 2.0 TGI
at 5500–6000 rpm at 1750–3500 rpm

Applications

The Eco version of the engine is used in:
The Pro version of the engine is used in:
The Pro version of the engine is used in:
The LKN is used in:
The 224 PS SAIC 20L4E is used in:
The 234 PS SAIC 20A4E is used in: