Suzuki K 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. The upgrades include new two injectors per cylinder, increased compression ratio, redesigned water jacket shape, piston cooling by oil jets, water-cooled EGR system and several other changes for fuel efficiency. The turbocharged variant with direct injection fuel system is called Boosterjet.
Furthermore, a mild hybrid technology with 12 or 48-volt Integrated Starter Generator dubbed as Smart Hybrid Vehicle by Suzuki is available for markets with stricter emission regulation, such as Europe, Japan, India, Singapore and Mexico. This mild hybrid technology helps to increase fuel mileage, providing optional acceleration and also reduces emissions. A strong hybrid variant with Motor Generator Unit is available in Europe and Japan.

Three-cylinder

K6A

This is the first K engine, which first appeared in 1994 and was discontinued in 2018. It is the smallest in the family and also the first K engine with VVT. This engine was available in several versions, such as naturally aspirated, turbocharged, lean-burn, CNG and strong hybrid. The hybrid version was also the first hybrid engine in the kei car class and only available in the Suzuki Twin.
Technical specifications:
  • Displacement:
  • Bore and stroke: 68 mm x 60.4 mm
  • Valvetrain: DOHC, 12-valve, with or without VVT
  • Compression ratio: 8.4–8.9, 10.5
  • Maximum power:
  • * at 5500–6500 rpm
  • * at 6000–6500rpm
  • * at 6500 rpm
  • Maximum torque:
  • * at 3500–4000 rpm
  • * at 3000–3500rpm
  • * at 3500 rpm
Applications:
The three-cylinder 1.0-litre version of K engine, fitted in many Suzuki's city cars since 2008. In 2014, this engine was reworked by increasing the compression ratio from 10.0 to 11.0:1 and known as K-Next. This changes claimed to increase the petrol mileage over 23km/L, achieved maximum power on lower rev and reduced frictional losses. CNG variant also available for Indian domestic market.
Technical specifications:
  • Displacement:
  • Bore and stroke: 73 mm x 79.4 mm
  • Valvetrain: DOHC, 12-valve
  • Compression ratio: 10.0–11.0
  • Maximum power:
  • * at 6000 rpm
  • * at 6000 rpm
  • Maximum torque:
  • * at 3500 rpm
  • * at 3500 rpm
Applications:
Reworked version of K10B engine with naturally aspirated Dualjet or turbocharged direct injection Boosterjet technology. The compression ratio was increased from 11.0:1 to 12.0:1 for more thermal efficiency and reduced frictional losses. Suzuki's
SHVS mild hybrid system is available for this engine in European and Japanese market. The CNG version is also available for Indian market.
Technical specifications:
  • Displacement:
  • Bore and stroke: 73 mm x 79.4 mm
  • Valvetrain: DOHC, 12-valve, Single or Dual VVT
  • Compression ratio: 10.0, 12.0
  • Maximum power:
  • * at 5500–6000 rpm
  • * at 5300 rpm
  • * at 1000 rpm
  • * at 5500 rpm
  • Maximum torque:
  • * at 3500 rpm
  • * at 3400 rpm
  • * at 1500–4500 rpm
  • * at 100 rpm
Applications:

K10A

The smallest four-cylinder K-series engine.
Technical specifications:
  • Displacement:
  • Bore and stroke: 68 mm x 68.6 mm
  • Valvetrain: DOHC, 16-valve, with or without VVT
  • Compression ratio: 8.4, 10.0
  • Maximum power:
  • * at 6500–7000 rpm
  • * at 6500 rpm
  • Maximum torque:
  • * at 3500 rpm
  • * at 4000 rpm
Applications:
Technical specifications:
  • Displacement:
  • Bore and stroke: 71 mm x 74 mm
  • Valvetrain: DOHC, 16-valve
  • Compression ratio: 9.3
  • Maximum power:
  • * at 6000 rpm
  • Maximum torque:
  • * at 3250 rpm
Applications:
  • 1998–2000 Suzuki Wagon R+

    K12B

Appeared first in 2008 and reworked with Dualjet technology in 2013. In China, this engine was also used by Suzuki's former joint venture partners, Changan Suzuki and its subsidiaries. Known under E-Power EA12 or JL473Q names.
Technical specifications:
  • Displacement:
  • Bore and stroke: 73 mm x 74.2 mm
  • Valvetrain: DOHC, 16-valve, VVT
  • Compression ratio: 11.0–12.0
  • Maximum power:
  • * at 5500–6000 rpm
  • Maximum torque:
  • * at 4400–4800 rpm
Applications:
The Dualjet version of K12B engine and can also combined with 12-volt SHVS mild hybrid technology or a strong hybrid system with Motor Generator Unit.
Technical specifications:
  • Displacement:
  • Bore and stroke: 73 mm x 74.2 mm
  • Valvetrain: DOHC, 16-valve, Dual VVT
  • Compression ratio: 12.5
  • Maximum power:
  • * at 6000 rpm
  • * at 1000 rpm
  • * at 3185–8000 rpm
  • Maximum torque:
  • * at 4400 rpm
  • * at 100 rpm
  • * at 1000–3185 rpm
Applications:
  • 2015–2025 Suzuki Solio/Mitsubishi Delica D:2
  • 2017–2024 Suzuki Swift
  • 2015–present Suzuki Ignis
  • 2015–2020 Suzuki Baleno

    [|K12D]

Replacing the previous K12C Dualjet engine for European, as the European emission standard has moved to Euro 6d stage. The displacement is the same as K12M and K12N Dualjet engines. The SHVS mild hybrid system is also standard.
Technical specifications:
  • Displacement:
  • Bore and stroke: 73 mm x 71.5 mm
  • Valvetrain: DOHC, 16-valve, Dual VVT
  • Compression ratio: 13.0
  • Maximum power:
  • * at 6000 rpm
  • * at 800 rpm
  • Maximum torque:
  • * at 2000 rpm
  • * at 499 rpm
Applications:
Destroked version of the K12B, developed by Maruti Suzuki. Mainly for the Indian market as the country imposed higher excise tax for petrol engines larger than 1,200 cc. This engine is also available for markets in South East Asia, South America and Africa; in 2020 the K12D derivative was developed from this.
VVT technology was added for this engine in 2012. In February 2018, the Dualjet version was introduced first in Thailand with higher 11.5:1 compression ratio.
Technical specifications:
  • Displacement:
  • Bore and stroke: 73 mm x 71.5 mm
  • Valvetrain: DOHC, 16-valve, with or without VVT
  • Compression ratio: 10.5–11.5
  • Maximum power:
  • * at 6000 rpm
  • * at 6000 rpm
  • Maximum torque:
  • * at 4000–4400 rpm
  • * at 4000 rpm
Applications:
  • 2009–2016 Suzuki Splash/Maruti Ritz
  • 2010–present Suzuki Swift
  • 2010–2025 Suzuki Dzire/Swift sedan
  • 2015–2022 Suzuki Baleno
  • 2017–present Suzuki Ignis
  • 2019–2022 Suzuki Wagon R
  • 2019–2022 Toyota Glanza

    K12N

Dualjet version of K12M engine and also available with SHVS mild hybrid technology. A version for commercial vehicles with lower output is also available.
Technical specifications:
  • Displacement:
  • Bore and stroke: 73 mm x 71.5 mm
  • Valvetrain: DOHC, 16-valve, Dual VVT
  • Compression ratio: 12.0
  • Maximum power:
  • * at 6000 rpm
at 6000 rpm
  • * at 6000 rpm
at 6000 rpm
  • Maximum torque:
  • * at 4200 rpm
at 2900 rpm
  • * at 4300 rpm
at 2800 rpm
Applications: