Suzuki K engine

Suzuki K engine
Suzuki K15B engine
Overview
Manufacturer	Suzuki
Production	1994–present
Layout
Configuration	Inline-three engine Inline-four engine
Displacement	658 cc (0.66 L) 996 cc (1.0 L) 998 cc (1.0 L) 1,171 cc (1.2 L) 1,197 cc (1.2 L) 1,242 cc (1.24 L) 1,373 cc (1.4 L) 1,462 cc (1.5 L)
Cylinder bore	68 mm (2.7 in) 71 mm (2.80 in) 73 mm (2.87 in) 74 mm (2.91 in)
Piston stroke	60.4 mm (2.38 in) 68.6 mm (2.70 in) 71.5 mm (2.81 in) 74 mm (2.91 in) 74.2 mm (2.92 in) 79.5 mm (3.13 in) 82 mm (3.23 in) 83 mm (3.27 in) 85 mm (3.35 in)
Cylinder block material	Aluminium
Cylinder head material	Aluminium
Valvetrain	DOHC 4 valves per cylinder with VVT (since 1999)[1]
Valvetrain drive system	Timing Chain
Compression ratio	8.4–13.0:1
RPM range
Max. engine speed	6200–8500 rpm
Combustion
Turbocharger	IHI, Mitsubishi
Fuel system	multipoint fuel injection or direct injection
Fuel type	Petrol CNG
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	37–146 PS (36–144 hp; 27–107 kW)
Torque output	55–235 N⋅m (6–24 kg⋅m; 41–173 lb⋅ft)
Chronology
Predecessor	Suzuki F engine Suzuki G engine (G10A/B) Suzuki M engine
Successor	Suzuki R engine

The Suzuki K engine family is a series of automobile engines from Suzuki, introduced in 1994. Displacements range from 0.7 L to 1.5 L. All engines have aluminium cylinder blocks with three or four cylinders in-line. Cylinder heads have two overhead camshafts, driven by chain, and four valves per cylinder. Fuel is gasoline/petrol, metered by multipoint fuel injection or direct injection. Some variants are turbocharged.

Since 2013, some of the K engines range have been upgraded with Dualjet technology.^[2] The upgrades include new two injectors per cylinder, increased compression ratio (improving the thermal efficiency), redesigned water jacket shape, piston cooling by oil jets, water-cooled EGR system and several other changes for fuel efficiency.^[3] The turbocharged variant with direct injection fuel system is called Boosterjet.^[4][5]

Furthermore, a mild hybrid technology with 12 or 48-volt Integrated Starter Generator (ISG) dubbed as Smart Hybrid Vehicle by Suzuki (SHVS) is available for markets with stricter emission regulation, such as Europe, Japan, Singapore and India. This mild hybrid technology helps to increase fuel mileage, providing optional acceleration and also reduces emissions.^[6][7] A strong hybrid variant with Motor Generator Unit (MGU) is available in Europe and Japan.