PSA EW/DW engine

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EW/DW engine
Overview
Manufacturer	PSA Peugeot Citroën
Production	1998–present
Layout
Configuration	Straight-four engine
Displacement	1.7 L (1,749 cc) 1.9 L (1,868 cc) 2.0 L (1,968 cc) 2.0 L (1,997 cc) 2.2 L (2,179 cc) 2.2 L (2,231 cc)
Cylinder bore	82.2 mm (3.24 in) 82.7 mm (3.26 in) 85 mm (3.35 in) 86 mm (3.39 in)
Piston stroke	81.4 mm (3.20 in) 88 mm (3.46 in) 96 mm (3.78 in)
Valvetrain	SOHC 2 valves x cyl. DOHC 4 valves x cyl. with VVT
Combustion
Turbocharger	Variable-geometry with intercooler (some versions)
Fuel system	Indirect injection Common rail direct injection Gasoline direct injection
Fuel type	Petrol, Diesel
Cooling system	Water-cooled
Output
Power output	69–203 PS (51–149 kW; 68–200 hp)
Torque output	127–370 N⋅m (94–273 lb⋅ft)
Emissions
Emissions target standard	Euro 3 – Euro 6
Emissions control systems	Catalytic converter, SCR
Chronology
Predecessor	PSA XU engine (for petrol engines) PSA XUD engine (for diesel engines)
Successor	Prince engine (for petrol engines) Ingenium engine (for diesel engines Jaguar Land Rover only)

The PSA EW/DW engine is a family of straight-4 black-top^[1] automobile engines^[2] manufactured by the PSA Group for use in their Peugeot and Citroën automobiles. The EW/DW family was introduced in 1998 as a replacement for the XU engine.^[3] Some DW engines are produced as part of a joint-venture with Ford Motor Company.

The EW/DW uses many parts from the XU, most notably the crankshaft, but is built with lighter materials. The EW name is used for the petrol engines ("e" for essence) and DW for Diesel engines.

All EWs are DOHC multivalve with displacement from 1.7 to 2.2 L (1,749 to 2,231 cc). They are mainly used for large family cars and executive cars, as well as large MPVs, although the 2.0 L is also used for some hot hatch models.

The DW started with an SOHC 2-valve design between 2.0 and 2.0 L (1,968 and 1,997 cc), later receiving DOHC and four valves per cylinder upon the introduction of the 2.2 L in 2000 with the Citroën C5 and Peugeot 607. Turbocharged versions started using common rail and received the commercial designation HDi. The DW10 served as the basis for the Ford/PSA engine partnership using second generation common rail and a variable-geometry turbocharger for the first time on the 2.0 L design.