VW Audi EA211 four cylinder engine

Volkswagen AG
EA211
Production period:	since 2011
Manufacturer:	Volkswagen AG
Engine Type:	line
Valve control:	DOHC
displacement:	1197 cc-1395 cm 3
Fuel supply:	various
Engine charging:	partially
Power:	44-110 kW
Previous model:	VW EA111
Successor:	VW EA211 evo

The VW EA211 is a gasoline engine series of four cylinders. The engine generation has been used in various vehicles of the Volkswagen Group since 2011 and is the successor to the VW EA111 series . The common features of all engines of the EA 211 series include four-valve technology , the drive of the two overhead camshafts ( DOHC valve control ) via a maintenance-free timing belt and the exhaust manifold integrated in the cylinder head .

Technology 

All variants have four valves per cylinder, which are operated via roller rocker arms of the two overhead camshafts ( DOHC valve control ). The camshafts are driven by the crankshaft via a maintenance-free toothed belt . All engines have stepless adjustment of intake camshaft by means of hydraulic phaser. The 1.4 TSI engines from 103 kW also have an adjustment of the exhaust camshaft. 

All four-cylinder, however, have a direct injection and a turbocharger with single-scroll turbine. Volkswagen uses the brand name " TSI " for these engines . Depending on the variant, different turbochargers are used, which differ mainly in the dimensions of the turbine and compressor wheels. The material of the turbocharger is designed for exhaust gas temperatures up to 950 ° C. For better cooling, the turbocharger is integrated into the cooling circuit of the intercooler. The wastegate flap is actuated by an electric charge pressure controller with integrated position transmitter. 

All engines have a three-way catalytic converter . From 2017 onwards, some variants will also use an Ottopartikelfilter (OPF). It is a closed particle filter. Unlike a diesel particulate filter , however, this requires no active regeneration due to the higher exhaust gas temperatures of the gasoline engine.

All engines are liquid cooled . The engine cooling high-temperature cooling circuit is divided into two circuits, one for the cylinder block and one for the cylinder head, to accelerate warm-up. Each circuit has its own thermostat.

There is also a low-temperature cooling circuit for indirect intercooling. In this cycle, the cooling of the exhaust manifold and the turbocharger is involved. The low temperature circuit has an electrically driven coolant pump, which, for example, the turbocharger can be cooled even after parking the vehicle.

Variants 

1.2 l four cylinder (1.2 TSI)

The displacement of the four-cylinder in - line engine is 1197 cc with a bore of 71.0 mm and a stroke of 75.6 mm, with a cylinder spacing of 82 mm. The compression is 10.5. The engine weighs according to DIN 97 kg.  The 1.2 TSI was first offered in two performance levels with 63 kW and 77 kW, the power outputs are achieved through a modified software. Thus, the maximum boost pressure for the 63 kW variant is 1.7 bar and for the 77 kW variant 1.9 bar.

1.4-liter four-cylinder (1.4 TSI) 

The displacement of the four-cylinder in - line engine is 1395 cc with a bore of 74.5 mm and a stroke of 80.0 mm, with a cylinder spacing of 82 mm. The compression is 10.5. In the 90 kW variant, the engine weighs 104 kg according to DIN, and 106 kg in the 103 kW variant. While the 90 kW variant has only one intake camshaft adjustment , the 103 kW variant has an intake and exhaust camshaft adjustment. The engine with 103 or 110 kW is also available in a version with cylinder deactivation(at Volkswagen: Active Cylinder Management, ACT, at Audi: Cylinders on Demand, CoD).