Ford Sigma engine

Ford Sigma engine
Ford Sigma engine
Overview
Manufacturer	Ford Motor Company, Yamaha Motor Company
Also called	Zetec-S; Zetec-SE; Duratec; Duratec Ti-VCT;
Production	1995–present
Layout
Configuration	I4
Displacement	1.2 L; 75.8 cu in (1,242 cc); 1.4 L; 84.7 cu in (1,388 cc); 1.5 L; 91.5 cu in (1,499 cc); 1.6 L; 97.4 cu in (1,596 cc); 1.7 L; 102.5 cu in (1,679 cc);
Cylinder bore	71.9 mm (2.83 in); 76 mm (2.99 in); 79 mm (3.11 in); 80 mm (3.15 in);
Piston stroke	76.5 mm (3.01 in); 81.4 mm (3.20 in); 83.5 mm (3.29 in); 2.0 L; 122.0 cu in (2,000 cc);
Cylinder block material	aluminium
Cylinder head material	aluminium
Valvetrain	SOHC 2 valves x cyl.; DOHC 4 valves x cyl. w/Ti-VCT
Compression ratio	10.0:1, 10.3:1, 11.0:1, 11.8:1
Combustion
Supercharger	On 2002 1.0-litre Ford Fiesta
Fuel system	Electronic fuel injection; Sequential multi-port FI
Management	PCM, Siemens
Fuel type	gasoline
Oil system	Pressure-fed with full flow oil filter
Cooling system	Water-cooled
Output
Power output	60–155 PS (44–114 kW; 59–153 hp)
Torque output	109–162 N⋅m (80–119 lb⋅ft)
Dimensions
Dry weight	81 kg (179 lb) (1.6 L Zetec); 90 kg (198 lb) (1.6 L Duratec)
Emissions
Emissions target standard	Euro 4, Euro 5
Emissions control systems	Close-coupled, closed loop, three-way catalyst with oxygen sensor
Chronology
Predecessor	CVH Engine; Valencia-HCS engine
Successor	Ford EcoBoost engine

The Ford Sigma is a small straight four automobile engine introduced in 1995 by Ford Motor Company. Its first evolution was sold as the Zetec-S (not to be confused with the trim level), then Zetec-SE and finally, in later years, renamed Duratec. The last upgrade of the engine is named Duratec Ti-VCT. Conceived for Ford's smaller models, the motor was intended to replace the older HCS (a derivative of the even older Kent unit) and smaller capacity CVH units.