{"id":12795,"date":"2020-03-19T14:18:59","date_gmt":"2020-03-19T18:18:59","guid":{"rendered":"https:\/\/techlink.mynetworkcontent.com\/?p=12795"},"modified":"2020-03-20T17:37:01","modified_gmt":"2020-03-20T21:37:01","slug":"new-3-cylinder-engines-drive-buick-encore-gx","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=12795","title":{"rendered":"New 3-Cylinder Engines Drive Buick Encore GX"},"content":{"rendered":"

The all-new 2020 Buick Encore GX (Fig. 10) features two new, fuel efficient, turbocharged 3-cylinder engines mated to either a continuously variable transmission (CVT) or a Hydra-Matic 9-speed automatic transmission.<\/span><\/p>\n

\"\"Fig. 10<\/b><\/span><\/p>\n

1.2L Turbo Engine<\/b><\/span><\/p>\n

The turbocharged 1.2L inline 3-cylinder engine (RPO LIH) is standard on front-wheel drive models. (Fig. 11) It\u2019s paired with the VT40 continuously variable transmission (RPO MRG). The engine produces 137 horsepower and 166 lb.-ft. of torque.<\/span><\/p>\n

\"\"Fig. 11<\/b><\/span><\/p>\n

The cylinder head is a dual overhead camshaft design made of cast aluminum alloy. Its combustion chamber contains four valves per cylinder. <\/span><\/p>\n

The engine has two camshafts, one for the intake valves and another one for the exhaust valves. The camshafts are driven using a Belt-in-Oil system. This system reduces noise and friction compared to timing chains and dry belt systems. Both the timing belt and the oil drive belt have a change interval of 150,000 miles (240,000 km) or 15 years.<\/span><\/p>\n

The aluminum alloy engine cylinder block is made by high pressure die casting with three cast-in-place iron cylinder liners. (Fig. 12) Of the four crankshaft bearings, the thrust bearing is located on the third bearing from the front of the engine. A lower structural extension forms the lower portion of the crankcase to promote cylinder block rigidity and reduce engine noise and vibration.<\/span><\/p>\n

\"\"Fig. 12<\/b><\/span><\/p>\n

The cast aluminum pistons are a lightweight and low-friction design with a recessed top and a barrel-shaped, graphite-coated skirt. The pistons use two compression rings and one oil control ring assembly. The chromium steel pins are designed to be full-floating and must be serviced with the pistons as an assembly.<\/span><\/p>\n

The oil cooler heat exchanger is mounted to the lower left side of the engine, on the coolant pump housing, and is used to cool the engine oil.<\/span><\/p>\n

 <\/p>\n

CVT Transmission<\/b><\/span><\/p>\n

The VT40 is a fully automatic single mode continuously variable, front-wheel drive transmission. (Fig. 13) The transmission features:<\/span><\/p>\n